... Flange, SW Flange, Thread Flange2). Diameter range: 1/2'' ~24'' (DN15~600)3). Pressure class: 150 - 1, 500Lbs4). Standard: ASME B16.5, ASME ... B16.36, S07005-I, HG20615~HG20622, BS1560-3.1, NF ... : Carbon steel, stainless steel, Alloy steel, Low-temperature steel. rst37.2 steel flanges