... , gas, water and some solid materials, pipes, etc..Seamless Carbon Steel Pipe:1.Seamless steel pipe for general use: ASTM A 53 GR.B ... .2mm W.T: SCH10S- SCH1202.Seamless steel pipe for high temperature:ASTM A 106 GR.B,Steel Grade: SA106B and speciation O.D ... .2mm W.T: SCH10S- SCH120;3.Seamless steel pipe DIN2448/1629,DIN17175, German standard,Steel Grade: st37,st42,st52,st35.8-st45.8 ...