API 5 l seamless steel tube 1. General purpose seamless steel tube ASTM A53 GR. B, steel grade: SA53 B, specifications: 1/4 "- 28, 13.7 711.2 mm 2. Hot work in seamless steel tube ASTM A106 GR. B, steel grade: SA106B, specifications: 1/4 "- 28, 13.7 711.2 mm 3. Line pipe API SPEC 5 l, steel grade, specification B: 1/4 "- 28, 13.7 711.2 mm 4. ASTM A53 / A106 GR/API 5 l. The B, steel grade: B, specifications: 1/4 "- 28, 13.7 711.2 mm 5. Heat exchanger and the condenser with ASTM A179, seamless carbon steel tube specifications: 3/4 ", 1" 6. - 40 ℃ to 101 ℃ low temperature operation with ASTM A333 seamless steel pipe, steel grade: GR. A, GR. 1, GR. 6, GR. 7, GR. 3, specifications: 1/4 "- 28, 13.7 711.2 mm 7. German standard DIN2448/1629 seamless steel tube, steel grade: St37, St44, St52, specifications: 1/4" - 28, 13.7 711.2 mm 8. Heat resistant steel seamless steel tube (heat pipe) DIN17175-1979, steel grade: carbon structural steel St35.8 St45.8 / I, St35.8 St45.8 / III 9. GB/T8162-1999 structure with seamless steel tubes, steel grade: 10 #, 20 #, 35 #, 45