This European Standard specifies requirements for elastomeric materials used in seals for supply pipes and fittings, ancillaries and valves at operating temperatures in general from - 5 °C up to 50 °C and in special cases from - 15 °C up to 50 °C, for the following: General applications (see Table 4, type G) a) gaseous fuel (manufactured, natural and liquefied petroleum gas [LPG] in gaseous phase); b) hydrocarbon fluids with aromatic content up to 30 % (V/V), including LPG in liquid phase. Special applications (see Table 4, type H) Materials suitable for carrying gaseous fuels containing gas condensates and hydrocarbon fluids of unrestricted aromatic content. General requirements for finished joint seals are also given; any additional requirements called for by the particular application are specified in the relevant product standards taking into account that the performance of pipe joints is a function of the seal material properties, seal geometry and pipe joint design. This European Standard should be used where appropriate with product standards which specify performance requirements for joints. This European Standard is applicable to joint seals for all pipeline materials including iron, steel, copper and plastics. In the case of composite seals requirements in 4.2.8 and 4.2.9 apply only when the materials used for any elastomeric parts come into contact with gaseous fuel or hydrocarbon fluid. Elongation at break, tensile strength, compression set and stress relaxation requirements for materials of hardness categories 80 and 90 apply only when they constitute that part of the seal which participates directly in the sealing function or in long term stability. This standard is not applicable to the following: a) seals made from cellular materials; b) seals with enclosed voids as part of their design; c) seals with requirements of resistance to flame or to thermal stress; d) seals which contain splices joining pre-vulcanised profile ends.
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ISO 1431-1:1989 Rubber, vulcanized or thermoplastic -- Resistance to ozone cracking -- Part 1: Static strain test
ISO 1817:1999 Rubber, vulcanized -- Determination of the effect of liquids
ISO 188:1998 Rubber, vulcanized or thermoplastic -- Accelerated ageing and heat resistance tests
ISO 1431-1:1989 Rubber, vulcanized or thermoplastic -- Resistance to ozone cracking -- Part 1: Static strain test
ISO 1817:1999 Rubber, vulcanized -- Determination of the effect of liquids
ISO 188:1998 Rubber, vulcanized or thermoplastic -- Accelerated ageing and heat resistance tests
ISO 2859-1:1999 Sampling procedures for inspection by attributes -- Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3302-1:1996 Rubber -- Tolerances for products -- Part 1: Dimensional tolerances
ISO 3384:1999 Rubber, vulcanized or thermoplastic -- Determination of stress relaxation in compression at ambient and at elevated temperatures
ISO 37:1994 Rubber, vulcanized or thermoplastic -- Determination of tensile stress-strain properties
ISO 3951:1989 Sampling procedures and charts for inspection by variables for percent nonconforming
ISO 4661-1:1993 Rubber, vulcanized or thermoplastic -- Preparation of samples and test pieces -- Part 1: Physical tests
ISO 471:1995 Rubber -- Temperatures, humidities and times for conditioning and testing
ISO 48:1994 Rubber, vulcanized or thermoplastic -- Determination of hardness (hardness between 10 IRHD and 100 IRHD)
ISO 815:1991 Rubber, vulcanized or thermoplastic -- Determination of compression set at ambient, elevated or low temperatures
ISO 9691:1992 Rubber -- Recommendations for the workmanship of pipe joint rings -- Description and classification of imperfections