Large Diameter Thick Wall PSL2 ERW Welded Steel Pipe 1. API 5L PSL1/2, 2. IPS-M-PI-190( ... kinds of special steel pipe and tube accoring your request, such as seamless carbon steel pipe and tube, JCOE technology ... thickness less than 2 inch etc. Standard:According to API 5L Gr.B standard.GB/TB163, GB/T8162, GB ... , G3461;ASTM A106, A53, A179, A192, A252, A500;API 5L Gr.B spec 1/2.Material:According to NACE ...