1)flanges 2)Material: carbon steel, stainless steel 3)Standard: ASME, ANSI, API, JIS, JPI, DIN, UNI, BS, AS NameflangesCompany TypeManufacturerStandardANSI, ASTM, DIN, JIS, GB, BS, etc.Size1/2"-80"Materialcarbon steel, stainless steel and alloy steelFlange typeWN,SO,SW,TH,BL,PL,LJApprovalFM/ULProcessfree forging, plate cuttingFinishRustproof oil, lake or yellow painting, lacquer, electrical ...