... pressure:0.25Mpa-10Mpa 3.temperature :0-550 Stainless steel welding neck flange 1.Type:Pipe fitting 2. ... -5504.inside nominal diameter:10-1200mm5.Material:stainless steel, carbon steel, alloy steel(Q235,20#,16Mn,ST45.8,12CrMoV,15CrMo,ooCr17Ni12Mo2 ... paint, yellow paint, black paint, electric galvanized 8.usage:Boilers and pressure vessels, petroleum, chemicals, shipbuilding, pharmaceutical, metallurgy, ...