... grades, specifications:1/ 4" -28", 13.7-711.2mm 2 Seamless steel pipe for high temperature operation of ... grades, specifications: 1/ 4" -28", 13.7-711.2mm 3 line pipe steel API SPEC5L: B specifications: ... grades, specifications: 1/ 4" -28", 13.7-711.2mm The 5 heat exchanger and condenser for seamless ... St52, specifications: 1/ 4" -28", 13.7-711.2mm 8 Steel seamless steel pipe (heat pipe) DIN17175-1979 ...