... ) 3). Pressure class: 150 - 1, 500Lbs 4). Standard: ASME B16.5, ASME B16.36, S07005-I, HG20615~HG20622, BS1560-3.1, NF E29 ... Material: Carbon steel, stainless steel, Alloy steel, Low-temperature steel. 5). Use: It has good welding performance, widely used in Petroleum ...