Ordinary seamless steel tube standard

　　1. General purpose seamless steel pipe ASTM A53 GR.B, steel number: SA53 B, specification: 1/4′′-28′′, 13.7-711.2mm

　　2. Seamless steel pipe for high temperature operation ASTM A106 GR.B, steel number: SA106B, specification: 1/4′′-28′′, 13.7-711.2mm

　　3. Line pipe API SPEC 5L, steel number: B, X42, X46, X52, specifications: 1/4"-28", 13.7-711.2mm

　　4.ASTM A106/A53/API 5L GR.B, steel number: B, specification: 1/4"-28", 13.7-711.2mm

　　5. Seamless low carbon steel pipe ASTM A179 for heat exchangers and condensers, size: 3/4′′, 1′′

　　6.-40°C-101°C seamless steel pipe ASTM A333 for low temperature operation, steel number: GR.A, GR.1, GR.6, GR.7, GR.3, specification: 1/4′′-28′′, 13.7-711.2mm

　　7. German standard DIN2448/1629 seamless steel pipe, steel number: St37, St44, St52, specifications: 1/4"-28", 13.7-711.2mm

　　8. Heat-resistant steel seamless steel pipe (heat-strength pipe) DIN17175-1979, steel number: carbon structural steel St35.8-St45.8/I, St35.8-St45.8/III, alloy structural steel 15Mo3, 13CrMo44 , 10CrMo910, specifications: 1/4"-28", 13.7-711.2mm

　　9. Structural seamless steel pipe GB/T8162-1999, steel number: 10#, 20#, 35#, 45#, 16Mn (Q345), specification: 6-720×1-70mm

　　10. Seamless steel pipe for conveying fluid GB/T8163-1999, steel number: 10#, 20#, 16Mn (Q345), specification: 6-720×1-70mm

　　11. Low and medium pressure boiler tube GB3087-1999, steel number: 10#, 20#, specification: 6-720×1-70mm

　　12. High pressure boiler tube GB5310-1995, steel number: 20G, specification: 6-720×1-70mm