... pipe for general use: ASTM A 53 GR.B,Steel Grade: SA53B and speciation O.D:1/2 ... "-28",21.34 -711.2mm W.T: SCH10S- SCH1202 ... pipe for high temperature:ASTM A 106 GR.B,Steel Grade: SA106B and speciation O.D:1/2 ... .8-st45.8/1, speciation O.D: 1/2"-28",21.34-711.2mm W.T: SCH10S- SCH120;4 ... API SPEC 5LSteel Grade :A,B,X42,X46,X52 (PSL1)and speciation O.D: 2"-28",60.3-711.2mm W ...