SA213 T91 Alloy Seamless Coal Gas Steel Pipe Thickness 2.5-60 mm Outer Diameter 21. ... ,12Cr1MoVG,SA210,SA213 4.Manufacturer Product NameSA213 T91 Alloy Seamless Coal Gas Steel Pipe Outer diameter21.3-762mmWall thickness2.5-60mmStandardASME SA213 ... pipes conveying fluid, such as the transportation of oil, natural gas, coal gas, water and some solid materials pipeline Compared to solid steel ...