STEEL PIPE

1.black steel pipe for general use: ASTM A 53 GR.B, Steel Grade: SA53B and specication 1/2"-48", 21.3-965mm 2.black steel pipe for high temperature:ASTM A 106 GR.B, Steel Grade: SA106B and specication 1/2"-48", 21.3-965mm 3.Pipeline: API SPEC 5L. Steel Grade: B,X42,X46,X52 and specification 1/2"-48", 21.3-965mm 4.black steel pipe for low temperature of -40C-101C, ASTM A333, Steel Grade: GR.A,GR.1,GR.7,GR.3 specication /12"-48", 21.3-965mm 5.black steel pipe DIN2448/1629,DIN17175-1979, German standard, Steel Grade: st37,st42,st52,st35.8-st45.8/1, specication 2"-48", 60.3-965mm