According to American Petroleum Institute standard APISPEC5CT1988 1st edition, petroleum casing steel grades H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P -110, Q-125 a total of 10 kinds. Oil casing shall be supplied with threads and couplings, or in any of the following pipe end forms: plain en

Product name: ERW steel pipeMaterial: Carbon steelSize: 500x3x6000mmStandard: ASTM A53Quantity: 6000 tonsMany cooperations have given the customer full confidence in THREEWAY STEEL.

1. The use of large-diameter stainless steel can be divided into oil well pipe (casing, oil pipe, drill pipe, etc.), line pipe, boiler pipe, mechanical structure pipe, hydraulic support pipe, gas cylinder pipe, geological pipe, chemical pipe (high-pressure fertilizer pipes, petroleum cracking pipes)

Pre-welding of straight seam steel pipe:Pre-welding includes seams and welds.1. There is no wrong edge or the wrong edge is smaller than the specified value. Generally, the amount of the wrong edge is ≤8% of the plate thickness, and the maximum is not more than 1.5mm.2. It is necessary to ensure tha