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Fixed, vertical road traffic signs - Part 1: Fixed signs

This Part 1 of EN 12899 specifies requirements for complete sign assemblies (including supports), signs (sign plates with sign faces), sign plates (without sign faces) and for other major components (retroreflective sheeting, supports and luminaires). The main intended use of fixed signs is for the instruction and guidance of road users on public and private land. Matters not covered by this standard: a) sign gantry and cantilever structures; b) signs with discontinuous messages, e.g. using light emitting diodes (LED), or fibre optics; c) variable message signs; d) signs used for temporary purposes; e) foundations; f) tests for extremely low temperatures.


Fixed, vertical road traffic signs - Part 2: Transilluminated traffic bollards (TTB)

This Part 2 of EN 12899 specifies requirements for new transilluminated traffic bollards (TTBs) including their fixing, which may incorporate traffic signs (type 1 TTB) or may support traffic signs (type 2 TTB) to be used in traffic circulation areas. It covers performance requirements and test methods. Colorimetric and retroreflective properties as well as luminance of transilluminated illuminated portions are specified taking into account CIE recommendations. Structural requirements for TTBs include performance under static and dynamic loading. Provision is made for safety in use, including vehicle impact. Devices of similar function, but without transillumination or less than 600 mm in height, are not covered. NOTE Foundations are not specified in this standard but should be adequate to support the loads to be carried. Unless otherwise stated, clauses in this standard apply to both type 1 and type 2 TTBs.


Fixed, vertical road traffic signs - Part 3: Delineator posts and retroreflectors

This Part 3 of EN 12899 specifies requirements for new delineator posts and for new retroreflectors as separate products or combined together to be used in traffic circulation areas. It covers performance requirements and test methods. Colorimetric and retroreflective properties are specified taking into account CIE recommendations. Structural requirements include performance under static and dynamic loading. Provision is made for safety in use, including vehicle impact. To define durability this standard also includes performance levels to be maintained after natural weathering exposure. No requirements are given for the use of colours, dimensions and tolerances of delineator posts and retroreflectors


Piston-operated volumetric apparatus -- Part 1: Terminology, general requirements and user recommendations

This part of ISO 8655 specifies the general requirements for piston-operated volumetric apparatus. It is applicable to piston pipettes, piston burettes, dilutors and dispensers. It furthermore defines terms for the use of piston-operated volumetric apparatus and gives user recommendations. ISO 8655 is not applicable to medical products intended for use on human beings, e.g. for medical syringes. NOTE For metrological requirements, maximum permissible errors, requirements for marking and information to be provided for users for piston-operated volumetric apparatus, see ISO 8655-2 for piston pipettes, see ISO 8655-3 for piston burettes, see ISO 8655-4 for dilutors and see ISO 8655-5 for dispensers. Conformity testing (type evaluation) of piston-operated volumetric apparatus is given in ISO 8655-3. Alternative test methods such as photometric and titrimetric methods will be the subject of a future Part 7 to ISO 8655. For all other tests (e.g. quality assurance by the supplier, analytical and measuring equipment quality assurance by the user) see ISO 8655-6 or alternative test methods.


Piston-operated volumetric apparatus -- Part 2: Piston pipettes

This part of ISO 8655 specifies — metrological requirements, — maximum permissible errors, — requirements for marking and — information to be provided for users, for air-displacement (type A) and positive-displacement (type D) single-channel and multi-channel piston pipettes, complete with their selected tip(s) and any other essential, consumable parts, designed to deliver their specified nominal volume (Ex). NOTE General requirements and definitions of terms of piston-operated volumetric apparatus are given in ISO 8655-1. Conformity testing (type evaluation) of piston-operated volumetric apparatus is given in ISO 8655-6. Alternative test methods such as photometric and titrimetric methods will be the subject of a future Part 7 to ISO 8655. For all other tests (e.g. quality assurance by the supplier, analytical and measuring equipment quality assurance by the user) see ISO 8655-6 or alternative test methods. For safety requirements of electrically powered piston pipettes, see IEC 61010-1


Piston-operated volumetric apparatus -- Part 3: Piston burettes

This part of ISO 8655 specifies — metrological requirements, — maximum permissible errors, — requirements for marking and — information to be provided for users, for piston burettes. It is applicable to piston burettes with nominal volumes up to 100ml , designed to deliver their volume (Ex). NOTE General requirements and definitions of terms for piston-operated volumetric apparatus are given in ISO 8655-1. Conformity testing (type evaluation) of piston-operated volumetric apparatus is given in ISO 8655-6. Alternative test methods such as photometric and titrimetric methods will be the subject of a future Part 7 to ISO 8655. For all other tests (e.g. quality assurance by the supplier, analytical and measuring equipment quality assurance by the user) see ISO 8655-6 or alternative test methods. For safety requirements of electrically powered piston burettes, see IEC 61010-1


Piston-operated volumetric apparatus -- Part 4: Dilutors

This part of ISO 8655 specifies — metrological requirements, — maximum permissible errors, — requirements for marking and — information to be provided for users, for dilutors with a sample uptake capacity (In) from 5 μl to 10mland a diluent capacity (Ex) from 50μ to 100 ml . They are designed to deliver the sample and diluent together in measured proportion and measured volume. NOTE General requirements and definitions of terms for piston-operated volumetric apparatus are given in ISO 8655-1. Conformity testing (type evaluation) of piston-operated volumetric apparatus is given in ISO 8655-6. Alternative test methods such as photometric and titrimetric methods will be the subject of a future Part 7 to ISO 8655. For all other tests (e.g. quality assurance by the supplier, analytical and measuring equipment quality assurance by the user) see ISO 8655-6 or alternative test methods. For safety requirements of electrically powered piston dilutors, see IEC 61010-1.


Piston-operated volumetric apparatus -- Part 5: Dispensers

This part of ISO 8655 specifies — metrological requirements, — maximum permissible errors, — requirements for marking and — information to be provided for users for dispensers. It is applicable to dispensers with nominal volumes from 1 μl up to 200 ml , designed to deliver their volume (Ex). NOTE General requirements and definitions of terms for piston-operated volumetric apparatus are given in ISO 8655-1. Conformity testing (type evaluation) of piston-operated volumetric apparatus is given in ISO 8655-6. Alternative test methods such as photometric and titrimetric methods will be the subject of a future Part 7 to ISO 8655. For all other tests (e.g. quality assurance by the supplier, analytical and measuring equipment quality assurance by the user) see ISO 8655-6 or alternative test methods. For safety requirements of electrically powered dispensers, see IEC 61010-1. 2 Normative


Piston-operated volumetric apparatus -- Part 6: Gravimetric methods for the determination of measurement error

This part of ISO 8655 specifies the reference method for conformity testing of piston-operated volumetric apparatus, whereby errors of measurement are determined gravimetrically. The tests are applicable to complete systems comprising the basic apparatus and all parts selected for use with the apparatus, disposable or reusable, involved in the measurement by uptake (In) or delivery (Ex) process. NOTE General requirements and definitions of terms of piston-operated volumetric apparatus are given in ISO 8655-1. For the metrological requirements, maximum permissible errors, requirements for marking and information to be provided for users for piston-operated volumetric apparatus, see ISO 8655-2 for piston pipettes, see ISO 8655-3 for piston burettes, see ISO 8655-4 for dilutors and see ISO 8655-5 for dispensers. Alternative test methods such as photometric and titrimetric methods will be the subject of a future Part 7 to ISO 8655.


Piston-operated volumetric apparatus -- Part 7: Non-gravimetric methods for the assessment of equipment performance

This part of ISO 8655 specifies the photometric and titrimetric determination of errors of measurement of piston-operated volumetric apparatus. The tests are applicable to complete systems comprising the basic apparatus and all parts selected for use with the apparatus, disposable or reusable, involved in the measurement by delivery process. These non-gravimetric test methods can be applied  as aids to quality assurance by the supplier,  as routine quality assurance and routine calibrations by the user, and  as routine and post-repair testing. The methods described in this part of ISO 8655 are not applicable as alternatives to the gravimetric reference test methods specified in ISO 8655-6, which gives the only method suitable as a basis for supplier's declarations or independent certification of conformity. NOTE 1 Metrological requirements for piston-operated volumetric apparatus, especially maximum permissible errors, are specified in ISO 8655-2 to ISO 8655-5. NOTE 2 For conformity tests or type tests for declaration and certification of conformity, see the gravimetric reference test methods in ISO 8655-6.


Detergents

1.1 This standard establishes rules designed to achieve the free movement of detergents and surfactants for detergents in the internal market while, at the same time, ensuring a high degree of protection of the environment and human health. 1.2 For this purpose, this standard harmonizes the following rules for the placing on the market of detergents: a- The biodegradability of surfactants in detergents; b- Restrictions or bans on surfactants on grounds of biodegradability; c- The additional labelling of detergents, including fragrance allergens; d- The information that manufacturers must hold at the disposal of the Member States’ competent authorities and medical personnel; e- Limitations on the content of phosphates and other phosphorus in detergents. f- Stability requirements and sampling procedure. g- List of substances which detergents must not contain except for restrictions (same list as for cosmetics products). h- List of preservatives allowed to be used in detergents (same list as for cosmetics products). 1.3 Are concerned by this standard in all forms (liquid, powder, pastes): - General cleaners (detergents for general purposes), all-purpose cleaners: Floor, wall, parquet, stainless, metal (all surfaces), wood, plastics etc… - Dishwashing liquids. - Automatic dishwashing liquids and automatic liquid rinse aids. - Glass cleaners. - Laundry detergents in all their forms: powder, liquid, paste etc… - Fabric softeners. - Ironing waters. - Degreasers. - Chlorine based products (javel water), which have to comply also with NL EN 901 & NL EN 15077. - Oxygen based products. - Phenols and halogenated phenols based products. - Surface disinfectants and antiseptics (except for their disinfecting and antiseptic claims which shall conform to the relative Lebanese standards when available). - Car care detergents. - Descalers and limestone removers. - Bathroom, bowls and toilets cleaners. - Industrial cleaners. - Detergents for food contact surfaces. - Hard surface cleaners. - Scouring products. - Any other detergents complying with the definitions in clause 3.


Chemicals used for treatment of water intended for human consumption - Sodium hypochlorite

This European Standard is applicable to sodium hypochlorite used for treatment of water intended for human consumption. It describes the characteristics of sodium hypochlorite and specifies the requirements and the corresponding test methods for sodium hypochlorite. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use of sodium hypochlorite (see Annex B). NOTE While this standard is not applicable to sodium hypochlorite generated in-situ (see bibliographic reference [7]), the limits for impurities and chemical parameters apply.


Chemicals used for treatment of swimming pool water - Sodium hypochlorite

This European Standard is applicable to sodium hypochlorite used directly or for the production of formulations for treating swimming pool water. It describes the characteristics of sodium hypochlorite and specifies the requirements and the corresponding test methods for sodium hypochlorite. It gives information on its use for treating swimming pool water and determines the rules relating to safe handling and use of sodium hypochlorite (see Annex B).


Laboratory glassware -- Desiccators

This International Standard specifies requirements and tests for desiccators and vacuum desiccators intended for general laboratory purposes such as drying of substances or material.


Laboratory glassware -- Petri dishes

This International Standard specifies requirements and tests for glass Petri dishes intended for general laboratory purposes and microbiological work.


Plastics laboratory ware -- Single-use Petri dishes for microbiological procedures

This International Standard specifies requirements and test methods for plain, single-use Petri dishes for microbiological use. This International Standard does not apply to products of similar design which may be used for cell or tissue culture purposes. Neither does it apply to dishes supplied ready loaded with microbiological media. NOTE Petri dishes are used for microbiological routine purposes in very large numbers and consequently, are often handled by robotic equipment. Users of such equipment should satisfy themselves that the Petri dishes of any given manufacturer are suitable for use with such equipment and, if obtained from several sources, are compatible if mixed.


Natural gas -- Vocabulary

This International Standard establishes the terms, definitions, symbols, and abbreviations used in the field of natural gas. The terms and definitions have been reviewed and studied in order to cover all aspects of any particular term with input from other sources such as European Standards from CEN (The European Committee for Standardization), national standards, and existing definitions in the IGU Dictionary of the Gas Industry. The definitive intention of this document is to incorporate the reviewed definitions into the ISO/TC 193 source standards


Natural gas -- Determination of sulfur compounds using gas chromatography

This International Standard specifies the determination of hydrogen sulfide, carbonyl sulfide, C1 to C4 thiols, sulfides and tetrahydrothiophene (THT) using gas chromatography (GC). Depending on the method chosen from those given in the annexes, the application ranges for the determination of sulfur compounds can vary, but whichever of the methods is used, the requirements of this International Standard apply.


Natural gas -- Determination of composition and associated uncertainty by gas chromatography -- Part 1: General guidelines and calculation of composition

This part of ISO 6974 gives methods for calculating component mole fractions of natural gas and specifies the data processing requirements for determining component mole fractions. This part of ISO 6974 provides for both single and multiple operation methods and either multi-point calibration or a performance evaluation of the analyser followed by single-point calibration. This part of ISO 6974 gives procedures for the calculation of the raw and processed (e.g. normalized) mole fractions, and their associated uncertainties, for all components. The procedures given in this part of ISO 6974 are applicable to the handling of data obtained from replicate or single analyses of a natural gas sample.


Natural gas -- Determination of composition and associated uncertainty by gas chromatography -- Part 2: Uncertainty calculations

This part of ISO 6974 describes the process required to determine the uncertainty associated with the mole fraction for each component from a natural gas analysis in accordance with ISO 6974-1.


Cosmetics -- Microbiology -- Enumeration and detection of aerobic mesophilic bacteria

This International Standard gives general guidelines for enumeration and detection of mesophilic aerobic bacteria present in cosmetics, ⎯ by counting the colonies on agar medium after aerobic incubation, or ⎯ by checking the absence of bacterial growth after enrichment. Because of the large variety of cosmetic products within this field of application, this method may not be appropriate for some products in every detail (e.g. certain water immiscible products). Other methods (e.g. automated) may be substituted for the tests presented here provided that their equivalence has been demonstrated or the method has been otherwise validated. If needed, microorganisms enumerated or detected may be identified using suitable identification tests described in the standards given in the Bibliography. In order to ensure product quality and safety for consumers, it is advisable to perform an appropriate microbiological risk analysis, so as to determine the types of cosmetic products to which this International Standard is applicable. Products considered to present a low microbiological risk include those with low water activity, hydro-alcoholic products, extreme pH values, etc.


Cosmetics -- Microbiology -- Enumeration of yeast and mould

This International Standard gives general guidelines for enumeration of yeast and mould present in cosmetics by counting the colonies on selective agar medium after aerobic incubation. In order to ensure product quality and safety for consumers, it is advisable to perform an appropriate microbiological risk analysis so as to determine the types of cosmetic products to which this International Standard is applicable. Products considered to present a low microbiological risk include those with low water activity, hydro-alcoholic products, products with extreme pH values, etc. Because of the large variety of cosmetic products within this field of application, this method might not be suited to some products in every detail (e.g. certain water-immiscible products). Other methods (e.g. automated) can be used for the test presented here provided that their equivalence has been demonstrated or the method has been otherwise validated. Yeast enumerated can be identified using suitable identification tests, for example tests described in the standards listed in the Bibliography. Mould enumerated can be identified by other appropriate methods, if necessary.


Cosmetics -- Microbiology -- Detection of specified and non-specified microorganisms

This International Standard gives general guidelines for the detection and identification of specified microorganisms in cosmetic products as well as for the detection and identification of other kinds of aerobic mesophilic non-specified microorganisms in cosmetic products. Microorganisms considered as specified in this International Standard might differ from country to country according to national practices or regulations. Most of them considered as specified microorganisms include one or more of the following species: Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus and Candida albicans. In order to ensure product quality and safety for consumers, it is advisable to perform an appropriate microbiological risk analysis in order to determine the types of cosmetic product to which this International Standard is applicable. Products considered to present a low microbiological risk include those with low water activity, hydro-alcoholic products, extreme pH values, etc. The method described in this International Standard is based on the detection of microbial growth in a nonselective liquid medium (enrichment broth) suitable to detect microbial contamination, followed by isolation of microorganisms on non-selective agar media. Other methods can be appropriate depending on the level of detection required. In this International Standard specific indications are given for identification of Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus and Candida albicans. Other microorganisms that grow under the conditions described in this International Standard, may be identified by using suitable tests according to a general scheme (see Annex A). Other standards (e.g., ISO 18416, ISO 21150, ISO 22717, ISO 22718) may be appropriate. Because of the large variety of cosmetic products within this field of application, this method might not be suited in every detail, to some products (e.g. certain water-immiscible products). Other methods (e.g. automated) can be substituted for the test presented here provided that their equivalence has been demonstrated or the method has been otherwise validated.


Cosmetics -- Microbiology -- Detection of Candida albicans

This International Standard gives general guidelines for the detection and identification of the specified microorganism Candida albicans in cosmetic products. Microorganisms considered as specified in this International Standard might differ from country to country according to national practices or regulations. In order to ensure product quality and safety for consumers, it is advisable to perform an appropriate microbiological risk analysis so as to determine the types of cosmetic product to which this International Standard is applicable. Products considered to present a low microbiological risk include those with low water activity, hydro-alcoholic products, those with extreme pH values, etc. The method described in this International Standard is based on the detection of Candida albicans in a nonselective liquid medium (enrichment broth), followed by isolation on a selective agar medium. Other methods may be appropriate dependent on the level of detection required. NOTE For the detection of Candida albicans, subcultures can be performed on non-selective culture media followed by suitable identification steps (e.g. using identification kits). Because of the large variety of cosmetic products within this field of application, this method might not be suited in every detail to some products (e.g. certain water-immiscible products). Other International Standards (e.g. ISO 18415) might be appropriate. Other methods (e.g. automated) can be substituted for the test presented here provided that their equivalence has been demonstrated or the method has been otherwise validated.


Cosmetics -- Microbiology -- Detection of Escherichia coli

This International Standard gives general guidelines for the detection and identification of the specified microorganism Escherichia coli in cosmetic products. Microorganisms considered as specified in this International Standard might differ from country to country according to national practices or regulations. In order to ensure product quality and safety for consumers, it is advisable to perform an appropriate microbiological risk analysis, so as to determine the types of cosmetic products to which this International Standard is applicable. Products considered to present a low microbiological risk include those with low water activity, hydro-alcoholic products, extreme pH values, etc. This International Standard specifies a method that is based on the detection of Escherichia coli in a non-selective liquid medium (enrichment broth), followed by isolation on a selective agar medium. Other methods may be appropriate depending on the level of detection required. NOTE For the detection of Escherichia coli, subcultures can be performed on non-selective culture media followed by suitable identification steps (e.g. using identification kits). Because of the large variety of cosmetic products within this field of application, this method might not be suited to some products in every detail (e.g. certain water-immiscible products). Other International Standards may be appropriate. Other methods (e.g. automated) can be substituted for the test presented h


Plastics piping systems for water supply and for buried and above-ground drainage and sewerage under pressure — Unplasticized poly(vinyl chloride) (PVC-U) — Part 3: Fittings

This part of ISO 1452 specifies the characteristics of fittings made from unplasticized poly(vinyl chloride) (PVC-U) for piping systems intended for water supply and for buried and above-ground drainage and sewerage under pressure. It also specifies the test parameters for the test methods referred to in this part of ISO 1452. In conjunction with ISO 1452-1, ISO 1452-2 and ISO 1452-5, it is applicable to PVC-U fittings and to joints with components of PVC-U, other plastics and non-plastics materials intended to be used for the following: a) water mains and services buried in the ground; b) conveyance of water above ground for both outside and inside buildings; c) buried and above-ground drainage and sewerage under pressure. It is applicable to fittings in piping systems intended for the supply of water under pressure up to and including 25 °C (cold water), intended for human consumption and for general purposes as well as for waste water under pressure. This part of ISO 1452 is also applicable to components for the conveyance of water and waste water up to and including 45 °C. For temperatures between 25 °C and 45 °C, Figure A.1 of ISO 1452-2:2009 applies. NOTE 1 The producer and the end-user can come to agreement on the possibilities of use for temperatures above 45 °C on a case-by-case basis. Depending on the jointing method, this part of ISO 1452 is applicable to the following types of fittings: ⎯ fittings for solvent cementing; ⎯ elastomeric ring seal fittings. PVC-U fittings can be manufactured by injection-moulding and/or be fabricated from pipe. This part of ISO 1452 is also applicable to PVC-U flange adapters and to the corresponding flanges made from various materials. This part of ISO 1452 covers a range of fitting sizes and pressure classes and gives requirements concerning colours. NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. NL


Plastics piping systems for water supply and for buried and above-ground drainage and sewerage under pressure — Unplasticized poly(vinyl chloride) (PVC-U) — Part 4: Valves

This part of ISO 1452 specifies the characteristics of valves made from unplasticized poly(vinyl chloride) (PVC-U) for piping systems intended for water supply and for buried and above-ground drainage and sewerage under pressure. It also specifies the test parameters for the test methods referred to in this part of ISO 1452. In conjunction with ISO 1452-1, ISO 1452-2, ISO 1452-3 and ISO 1452-5 it is applicable to PVC-U valves with components of PVC-U, other plastics and non-plastics materials intended to be used for the following: a) water mains and services buried in ground; b) conveyance of water above ground for both outside and inside buildings; c) buried and above-ground drainage and sewerage under pressure. It is applicable to valves in piping systems intended for the supply of water under pressure up to and including 25 °C (cold water) intended for human consumption and for general purposes as well as for waste water under pressure. This part of ISO 1452 is also applicable to valves for the conveyance of water and waste water up to and including 45 °C. For temperatures between 25 °C and 45 °C, Figure A.1 of ISO 1452-2:2009 applies. NOTE 1 The producer and the end-user can come to agreement on the possibilities of use for temperatures above 45 °C on a case-by-case basis. This part of ISO 1452 is applicable to valves of the following types: ⎯ valves for solvent cementing; ⎯ valves for elastomeric ring seal joints; ⎯ valves for flanged joints. NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.


Medical laboratories -- Requirements for quality and competence

This International Standard specifies requirements for quality and competence in medical laboratories. This International Standard can be used by medical laboratories in developing their quality management systems and assessing their own competence. It can also be used for confirming or recognizing the competence of medical laboratories by laboratory customers, regulating authorities and accreditation bodies. NOTE International, national or regional regulations or requirements may also apply to specific topics covered in this International Standard.


Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 4: Valves for water supply systems

This Part of EN 12201 specifies the characteristics of valves or valve bodies made from polyethylene (PE 100 and PE 80) for buried and above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes. NOTE 1 For valves or valve bodies intended for drainage and sewerage under pressure, additional specifications/tests may be necessary according to the requirements of the purchaser, especially for the chemical resistance of the components in contact with the fluids and functioning characteristics. NOTE 2 For PE components intended for the conveyance of water for human consumption and raw water prior to treatment attention is drawn to 5.4. Components manufactured for water for other purposes may not be suitable for water supply for human consumption. It also specifies the test parameters for the test methods referred to in this European Standard. NOTE 3 Valves made from material other than polyethylene (PE) designed for the supply of water intended for human consumption to a relevant standard(s) can be used in PE piping systems conforming to EN 12201 when they have relevant PE connection for butt fusion or electrofusion ends (see EN 12201-3:2011). In conjunction with Parts 1, 2, 3 and 5 of EN 12201 it is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) allowable operating pressure, PFA, up to 25 bar 1) b) an operating temperature of 20 °C as a reference temperature; c) buried in the ground; d) sea outfalls; e) laid in water; f) above ground, including pipes suspended below bridges. NOTE 4 For applications operating at constant temperature greater than 20 °C and up to 40 °C, see EN 12201-1:2011, Annex A. EN 12201 covers a range of allowable operating pressures and gives requirements concerning colours and additives. NOTE 5 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes. This Part of EN 12201 covers valves for pipes with a nominal outside diameter dn ≤ 315 mm.


Natural gas -- Determination of sulfur compounds -- Part 1: General introduction

This part of ISO 6326 gives a brief description of standardized methods that can be used for the determination of sulfur compounds in natural gas. The principle of each method is described generally, the range of concentrations for which the method is suitable is indicated, and the analytical range and precision of each method is given. It should enable the user to select judiciously the proper method for the application being considered. Sulfur analysis is performed in order to determine a) total sulfur, b) sulfur contained in specific groups (e.g. thiol sulfur), c) individual sulfur compounds, and d) specific groups of sulfur compounds. The standardized methods available in the field of sulfur analysis are ⎯ the Wickbold combustion method: for total sulfur determination (ISO 4260), ⎯ the Lingener combustion method: for total sulfur determination (ISO 6326-5), ⎯ gas chromatography: for determination of individual sulfur compounds (ISO 19739), and ⎯ potentiometry: for determination of hydrogen sulfide, carbonyl sulfide and thiol compounds (ISO 6326-3). Other methods for the determination of sulfur compounds are available but are not considered here. Table 1 gives an overview of the standardized methods which can be used for the determination of total sulfur, hydrogen sulfide, carbonyl sulfide, tetrahydrothiophene, thiol sulfur, individual thiols, individual thiophenes, individual organic sulfides and disulfides.


Natural gas -- Determination of sulfur compounds -- Part 3: Determination of hydrogen sulfide, mercaptan sulfur and carbonyl sulfide sulfur by potentiometry

This part of ISO 6326 specifies a potentiometric method for the determination of hydrogen sulfide, mercaptan Sulfur, and car- bonyl sulfide Sulfur in natura1 gas in the concentration range equal to or above 1 mg/m3. The gas must be free of dust, mist, Oxygen, hydrogen cyanide and carbon disulfide. The hydrogen suIfide/mercaptan Sulfur ratio and also the mercaptan sulfur/hydrogen sulfide ratio should not exceed 50 : 1. The method is not recommended for gases containing more than approximately 1,5 % ( Vl V carbon dioxide. NOTE - In all Parts of ISO 6326, 1 m3 of gas is expressed at normal conditions (0 “C; 101,325 kPaL


Natural gas -- Determination of sulfur compounds -- Part 5: Lingener combustion method

This part of ISO 6326 specifies a method for the determination of total Sulfur in natura1 gas. The method is applicable to gases with Sulfur contents between 0,5 mg/m3 and ‘l 000 mg/m3. With a total Sulfur content of more than 0,l mg Sulfur in the absorption Solution, visual titration with an indicator tan be Chosen, whereas for lower contents turbidimetric titration is preferable. NOTE - In all Parts of ISO 6326, 1 m3 of gas is expressed at normal conditions (0 OC; 101,325 kPa).


Natural gas -- Determination of mercury -- Part 1: Sampling of mercury by chemisorption on iodine

This part of ISO 6978 specifies a method for the determination of total mercury content in natural gas using a sampling method at pressures up to 40 MPa by chemisorption on iodine-impregnated silica gel. This sampling method is suitable for the determination of mercury contents within the range of 0,1 µg/m3 to 5 000 µg/m3 in natural gas. This method is applicable to sampled gas volumes containing less than 20 mg hydrogen sulfide (absolute content) and less than a total liquid hydrocarbon condensate of 10 g/m3 under the sampling conditions. The collected mercury is determined by measuring the absorbance or fluorescence of mercury vapour at 253,7 nm. NOTE ISO 6978-2 gives a sampling method suitable for the determination of mercury content of pipeline natural gas by amalgamation of mercury on gold/platinum alloy thread at atmospheric pressure for the range of mercury from 0,01 µg/m3 to 100 µg/m3 and for sampling at high pressure (up to 8 MPa) from 0,001 µg/m3 to 1 µg/m3.


Natural gas -- Determination of mercury -- Part 2: Sampling of mercury by amalgamation on gold/platinum alloy

This part of ISO 6978 specifies a method for the determination of total mercury content of pipeline quality natural gas using a sampling method by amalgamation on gold/platinum (Au/Pt) alloy thread. This method is applicable to the sampling of raw natural gas when no condensation is present. At atmospheric pressure, this method is suitable for the determination of mercury content within the range of 0,01 µg/m3 to 100 µg/m3 in natural gas samples. At higher pressures (up to 8 MPa), this sampling method is suitable for the determination of mercury contents within the range of 0,001 µg/m3 to 1 µg/m3. The collected mercury is determined by measuring the absorbance or fluorescence of mercury vapour at 253,7 nm. NOTE ISO 6978-1 gives a sampling method suitable for the determination of mercury contents in natural gas by chemisorption on iodine-impregnated silica gel for the working range of 0,1 µg/m3 to 5 000 µg/m3 for sampling at pressures up to 40 MPa.


Natural gas -- Standard reference conditions

This International Standard specifies the standard reference conditions of temperature, pressure and humidity to be used for measurements and calculations carried out on natural gases, natural-gas substitutes and similar fluids. The primary application is expected to be in international custody transfer, where the reduction to a common basis of those physical attributes of a gas which describe both its quality and quantity will simplify the practice of world trade and commerce.


Natural gas -- Determination of composition with defined uncertainty by gas chromatography -- Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns

This part of ISO 6974 describes a gas chromatographic method for the quantitative determination of the content of helium, hydrogen, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons in natural gas samples using two packed columns. This method is applicable to determinations made in on-line processes or in the laboratory. It is applicable to the analysis of gases containing constituents within the mole fraction ranges given in Table 1 and which do not contain any hydrocarbon condensate. These ranges do not represent the limits of detection, but the limits within which the stated precision of the method applies. Although one or more components in a sample may not be detected present, the method can still be applicable. This part of ISO 6974 is only applicable in conjunction with parts 1 and 2 of ISO 6974.


Natural gas -- Determination of composition with defined uncertainty by gas chromatography -- Part 4: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns

This part of ISO 6974 describes a gas chromatographic method for the quantitative determination of natural gas constituents using a two-column system. This method is applicable to determinations made in on-line processes or in the laboratory. It is applicable to the analysis of gases containing constituents within the mole fraction ranges given in Table 1. These ranges do not represent the limits of detection, but the limits within which the stated precision of the method applies. Although one or more components in a sample may not be detected present, the method can still be applicable. This part of ISO 6974 is only applicable if used in conjunction with parts 1 and 2 of ISO 6974. Table 1 — Application ranges Component Mole fraction range % Nitrogen 0,001 to 15,0 Carbon dioxide 0,001 to 10 Methane 75 to 100 Ethane 0,001 to 10,0 Propane 0,001 to 3,0 iso -Butane (2-methylpropane) 0,001 to 1,0 n -Butane 0,001 to 1,0 neo -Pentane (2,2-dimethylpropane) 0,001 to 0,5 iso -Pentane (2-methylbutane) 0,001 to 0,5 n -Pentane 0,001 to 0,5 Hexanes sum of all C6 and higher hydrocarbons 0,001 to 0,2 NOTE 1 Oxygen is not a normal constituent of natural gas and would not be expected to be present in gas sampled for an on-line instrument. If any oxygen is present as a result of air contamination, it will be measured with the nitrogen. The resulting (nitrogen oxygen) value will be in error to a small extent because of the slight difference between detector responses for oxygen and nitrogen. Nonetheless, the result for the natural gas/air mixture will be reasonably accurate since neither component contributes to the calorific value. NL ISO 6974-4:2015 ISO 6974-4:2000(E) 2 © ISO 2000 – All rights reserved NOTE 2 The content of helium and argon are assumed to be negligible and unvarying such that helium and argon need not be determined.


Natural gas -- Determination of composition and associated uncertainty by gas chromatography -- Part 5: Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons columns

This part of ISO 6974 describes a gas chromatographic method for the quantitative determination of natural gas constituents using a three-column system. This method is applicable to natural gases of limited range, on-line and automatically calibrating on a regular basis for gas samples not containing any hydrocarbon condensate and/or water. It is applicable to the analysis of gases containing constituents within the mole fraction ranges given in Table 1. These ranges do not represent the limits of detection, but the limits within which the stated precision of the method applies. Although one or more components in a sample may not be detected present, the method can still be applicable. This part of ISO 6974 is only applicable if used in conjunction with parts 1 and 2 of ISO 6974. Table 1 — Application ranges Component Mole fraction range % Nitrogen 0,001 to 15,0 Carbon dioxide 0,001 to 8,5 Methane 75 to 100 Ethane 0,001 to 10,0 Propane 0,001 to 3,0 iso-Butane (2-methylpropane) 0,001 to 1,0 n-Butane 0,001 to 1,0 neo -Pentane (2,2-dimethylpropane) 0,001 to 0,5 iso-Pentane (2-methylbutane) 0,001 to 0,5 n-Pentane 0,001 to 0,5 Hexanes sum of all C6 and higher hydrocarbons 0,001 to 1,0 NOTE 1 Hydrocarbons higher than n-pentane are expressed as the "pseudo-component" C6 which is measured as one composite peak and calibrated as such. The properties of C6 are calculated from detailed analyses of the individual C6 and higher hydrocarbons by extended analysis or from historical data. NOTE 2 Oxygen is not a normal constituent of natural gas and would not be expected to be present in gas sampled for an on-line instrument. If any oxygen is present as a result of air contamination, it will be measured with the nitrogen. The resulting (nitrogen oxygen) value will be in error to a small extent because of the slight difference between detector responses for oxygen and nitrogen. Nonetheless, the result for the natural gas/air mixture will be reasonably accurate since neither component contributes to the calorific value. NOTE 3 The content of helium and argon are assumed to be negligible and unvarying such that helium and argon need not be determined.


Natural gas -- Determination of composition with defined uncertainty by gas chromatography -- Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns

This part of ISO 6974 describes a gas chromatographic method for the quantitative determination of the content of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons in natural gas samples using three capillary columns. It is applicable to the analysis of gases containing constituents within the mole fraction ranges given in Table 1 and is commonly used for laboratory applications. These ranges do not represent the limits of detection, but the limits within which the stated precision of the method applies. Although one or more components in a sample may not be present at detectable levels, the method can still be applicable. This part of ISO 6974 is only applicable if used in conjunction with parts 1 and 2 of ISO 6974. This method can also be applicable to the analysis of natural gas substitutes. NOTE Additional information on the applicability of this method to the determination of natural gas substitutes is also given where relevant.


Natural gas -- Extended analysis -- Gas-chromatographic method

This International Standard describes the specifications for the quantitative analysis of the following components of natural gas: helium hydrogen argon oxygen nitrogen carbon dioxide saturated hydrocarbons from C1 to C5 hydrocarbon fractions from C6 upwards aromatic compounds as benzene and toluene The gas-chromatographic methods determine the components in the following ranges: oxygen: 0,001 % (n/n) to 0,5 % (n/n) helium: 0,001 % (n/n) to 0,5 % (n/n) hydrogen: 0,001 % (n/n) to 0,5 % (n/n) argon: 0,001 % (n/n) to 0,5 % (n/n) nitrogen: carbon dioxide: methane: ethane: propane: 0,001 % (n/n) to 40 % (n/n) 0,001 % (n/n) to 40 % (n/n) 50 % (n/n) t0 100 % (n/n) 0,OZ % (n/n) t0 15 % (n/n) 0,001 % (n/n) t0 5 % (n/n) higher hydrocarbons: The method can measure hydrocarbon components from IO-6 (n/n) up to their maximum concentration, which is compatible with the requirement that the gas is free from hydrocarbon condensate at any pressure in the range 1 x IO* kPa to 7 x 103 kPa. 1 NL ISO 6975:2015 IS0 6975:1997(E) @ IS0 This method is not intended for the determination of oxygen compounds (water vapour, methanol, glycols) or sulfur compounds” It is not possible to make unambiguous identifications of hydrocarbons above Ca. Even where “spiking” a gas mixture with known components shows where they elute, it cannot be stated with certainty that such a component is the only one with that retention time. Unidentified components are classified according to the carbon number which the analysis indicates to be appropriate. While this is a necessary simplification, it does allow a reasonable quantitative value to be obtained. This method is intended for use in situations where the hexanes plus compositional breakdown and/or the complete analysis is desired. The method is not intended for dense phase gases whose pressure exceeds the cricondebar (critical condensation pressure), or for gas samples containing any measurable hydrocarbon condensate, liquid water or process fluid such as methanol or glycols (see IS0 6570-I and IS0 10715). Gases which have been treated for transmission are unlikely to contain detectable levels of hydrocarbons above C12. Samples taken from nearer the well head, before the gas has reached gas treatment plants, may contain hydrocarbons to C16 or above.


Plastics piping systems - Guidance for the installation inside buildings of pressure piping systems for hot and cold water intended for human consumption

This European Technical Report recommends practices to be followed in the application and installation of thermoplastics pipes and associated fittings. These fall within the scope of EN 806-1 and, EN ISO 15874, EN ISO 15875, EN ISO 15876, EN ISO 15877 and EN ISO 22391 to be used for hot and/or cold water distribution intended for human consumption inside buildings. This document can also be used for heating installations if applicable, except for under floor heating for which EN 12164 can apply. Guidance is also given on acceptable methods of jointing polybutylene (PB), crosslinked polyethylene (PE-X), polypropylene (PP), chlorinated poly(vinyl chloride) (PVC-C) and Polyethylene of raised temperature resistance (PE-RT) pipes and associated fittings, together with recommendations for their storage, handling and transportation.


Plastics pipes and fittings - Characteristics for utilisation of non-virgin PVC-U, PP and PE materials

This Technical Specification specifies definitions and recommended characteristics and test methods for the utilisation of PVC-U, PP and PE non-virgin materials in pipes, fittings and ancillaries for both pressure and non-pressure piping systems. This Technical Specification specifies the conditions for utilisation of non-virgin material with and without agreed specification Non-virgin materials may be reformulated by the use of additives and processing techniques to meet an agreed specification. Typically the additives used would be stabilisers and pigments etc. The WG responsible for the product standard should consider the content of this document and only permit dosage levels which give compliance with the requirements of the product standard. Further, the WG should consider whether extra or more frequent product testing is relevant when using such material in the production of pipes and fittings in accordance with the relevant product standard. NOTE For the purpose of this specification the term pipes means extruded pipes, gutters and any parts of a fabricated fitting which is made from an extruded pipe. The term fitting means injection- and rotomoulded fittings and injection moulded parts of a fabricated fitting. For the recycling process, the testing and the use of the non-virgin material National and/or European regulations may apply.


Plastics piping systems - Guidance for coding of products and their intended uses

This Technical Report gives guidance for the coding of products, their classification and intended uses for plastics piping systems. It lays down reference terms and symbols to be used when establishing documentation accompanying the CE marking according to the European Directives


Gas cylinders -- Refillable welded steel cylinders for liquefied petroleum gas (LPG) -- Periodic inspection and testing

This International Standard specifies the intervals and inspection and testing procedures for the periodic inspection of refillable welded steel dedicated LPG cylinders of water capacity from 0,5 l up to and 150 l including . It applies to cylinders protected by a system to prevent external corrosion and designed and manufactured in accordance with ISO 4706, ISO 22991 or an equivalent design and construction standard. This International Standard may also apply to other refillable welded steel cylinder designs for LPG with the approval of the national authority. Cylinders for the on-board storage of LPG as a fuel for vehicles are excluded from this standard, except cylinders used for fork-lift truck applications.


Gas cylinders -- Refillable welded steel cylinders for liquified petroleum gas (LPG) -- Procedures for checking before, during and after filling

This International Standard specifies the procedures to be adopted when checking transportable refillable welded steel LPG cylinders before, during and after filling. It applies to transportable refillable welded steel LPG cylinders of water capacity from 0,5 l up to and lincluding150 . It does not apply to cylinders permanently installed in vehicles, or to plant and filling equipment


Flat rolled steel products for welded gas cylinders

This International Standard specifies the characteristics of flat rolled steel products with a thickness up to 6 mm of the unalloyed steels listed in table 1 which are intended for welded gas cylinders (sec ISO 4706l)) with a normalized structure.


Transportable gas cylinders -- Cylinder valves -- Specification and type testing

This International Standard specifies valve design, production and marking requirements, and type test methods for valves intended to be fitted to gas cylinders which convey compressed, liquefied or dissolved gases. This International Standard does not apply to valves for cryogenic equipment, for fire extinguishers or for liquefied petroleum gas (LPG). Additional specific requirements for valves fitted with pressure-reducing devices (see ISO 22435 and EN 738-3), residual pressure-retaining devices and non-return devices (see ISO 15996), and bursting discs and pressure-relief devices (see ISO 4126 and prEN 14513) are not covered by this International Standard. NOTE Requirements for valves for liquefied petroleum gas (LPG) are specified in ISO 14245 and EN 13152, and in ISO 15995 and EN 13153. Requirements for valves for cryogenic vessels are specified in ISO 21011. Further specific requirements for valves for breathing apparatus are specified in EN 144-1, EN 144-2 and EN 144-3.


Oscillation-type density meters -- Part 1: Laboratory instruments

This part of ISO 15212 specifies metrological and other requirements for oscillation-type density meters which are used in laboratories for all kinds of homogeneous fluid samples. In addition, a method for adjustment and calibration of laboratory instruments is given. The instruments are either stand-alone units or part of more complex measuring equipment supplying additional test parameters of the sample. This part of ISO 15212 does not describe the method of use of density meters for particular applications or products such as petroleum products or beverages. Such methods of use can be defined by relevant institutions such as ISO or responsible government agencies. This part of ISO 15212 does not define an instrument specification for any particular application. For this information reference should be made to the relevant standard covering the method of use. This part of ISO 15212 is addressed to manufacturers of density meters and to bodies testing and certifying the conformity of density meters. In addition, this part of ISO 15212 gives recommendations for adjustment and calibration of density meters by the user.


Oscillation-type density meters -- Part 2: Process instruments for homogeneous liquids

This part of ISO 15212 specifies metrological requirements, among others, for oscillation-type density meters as well as for functional units (see 4.2) of oscillation-type density meters, which are used in process for all kinds of homogeneous liquids. This includes liquified gases. Instructions and methods for installation, preadjustment, adjustment and calibration of process instruments are also given. The instruments are either integral systems or functional units, which can be combined into an integral measuring system. This part of ISO 15212 does not describe the method of use of process density meters for particular applications or products, e.g. petroleum products or beverages. Such methods of use can be defined by relevant institutions such as ISO or responsible Government agencies. This part of ISO 15212 does not define an instrument specification for any particular application. For this information reference should be made to the relevant standard covering the method of use. This part of ISO 15212 is addressed to manufacturers of density meters and to bodies, testing and certifying the conformity of density meters. This part of ISO 15212 also gives recommendations for adjustment and calibration of process density meters. Oscillation-type density meters used in laboratories are addressed in ISO 15212-1.


Laboratory glassware -- Filter flasks

This International Standard specifies requirements to filter flasks with conical or cylindrical shape for general laboratory purposes.