... , Jiangsu, Shandong of China (Mainland)* Mill: Qingshan, Baofeng, Taigang pipe* Certification: ISO* Material Grade: 304,304L,309,310S,316L,321 ... party by high-temperature and high pressure, high temperature gas pipe in water vapor and the effects of oxidation and corrosion ... occur and therefore require a high level of durable steel pipe strength, high antioxidant properties and have a good organization ...