... Quality Stainless Steel SS316L API Pipe Fitting Coupling in Hot Sale Stainless Steel Pipe Coupling, Carbon Steel Pipe Coupling, Alloy Steel Pipe Coupling ... Crosses, Flanges, Bends, seamless Bends, pipe joints, etc.Materialcarbon steel, alloy steel, stainless steelStandardASME B16.9 B16.28, ASTM ... steel plate from D630mm to D3320mm 5, Socket welding pipe fittings from D3mm to D159mm 6, High-medium-low ...