Carbon steel seamless steel pipe 1.Seamless steel pipe for general use: astm a 53 gr.B, Steel grade: sa53b and specication 2"-28"·+60.3-711.2mm 2.Seamless steel pipe for high temperature:astm a 106 gr.B, Steel grade: sa106b and specication 2"-28", 60.3-711.2mm 3.Pipeline: api spec 5l. 5ct Steel grade: b, x42, x46, x52 and specification 2"-28", 60.3-711.2mm 4.Seamless steel pipe for low temperature of -40f¦-101f¦, astm a333, Steel grade: gr.A, gr.1, gr.7, gr.3 specication 2"-28", 60.3-711.2mm 5.Seamless steel pipe din2448/1629, din17175-1979, german standard, Steel grade: st37, st42, st52, st35.8-st45.8/1, specication 2"-28", 60.3-711.2mm; Carbon steel welded steel pipe 1.American standard, erw high frequency welded pipe astm a 106f=a53, Specification: 4"-24" 114.3-609.6mm. 2.British standard, erw high frequency welded pipe bs 1387, Specification: 4"-24" 114.3-609.6mm. The purpose of our company is "development on honesty and cooperation for double-win" and our quality politcy is "to satisfy all the clients' requirements with high quality and excellent service". Standard lot size , weight , dimensions