... the trend of pipeline industry; it is widely used in cold and hot water supply, heating supply, fire protection, medicinal ... : GBT 19228.3-2003, EN681-1:1998Technical information:-- Material: Stainless steel 304 and 316L available.-- Max working pressure 1.6MPa (equal ... degree centigrade (with Chlorinated butyl rubber O ring),-- Suit medium: cold water, hot water, compressed air, gas, oil etcSizes range ...