ASTM A234 carbon steel pipe fitting grade, alloy steel pipe fittings are made of chromium, molybdenum, nickel alloy, Hastelloy, Monel, Inconel and other alloy elements, with higher pressure rating, better strength, good corrosion resistance resistance and longer durability. Нефти, хийн дамжуулах, химийн үйлдвэр, химийн үйлдвэр, цөмийн ургамал, цөмийн хүч, бусад салбарууд