scope:

This standard specifies requirements and associated test methods for vulcanized rubber materials in gas appliances and equipment in contact with 1st, 2nd and 3rd family combustible gases. It also establishes a classification based on temperature range and hardness. This standard is applicable to materials from which are manufactured homogeneous seals and homogeneous or reinforced diaphragms. The normal range of operating temperatures covered by this standard is 0°C to +60°C. Tests are also included for applications using diaphragms withint the range -20°C to +80°C and seals within the range -20°C tp +150°C. For temperature outside these ranges the user should contact the manufacturer regarding the suitability of the rubber material.