... water, gas, and oil. Standard:API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711 Certificate:API ... 12''-72'') Wall Thickness:5.0 - 50mm Length:6 – 12m Steel Grade:API 5L: GR B, X42, X46, X56, X60, ... ASTM A53: GR A, GR B, GR C EN: S275, S275JR, S355JRH, S355J2H GB: Q195, Q215, Q235, Q345, L175, L210, L245 ... , Hydrostatic Test, X-ray Test. Mill Test Certificate:EN 10204/3.1B