... ERW Welded Steel Pipe 1. API 5L PSL1/2, 2. IPS-M-PI-190(2), 3. NACE MR-0175. Large Diameter ... tubes, length less than 14 meters, thickness less than 2 inch etc. Standard:According to API 5L Gr.B standard.GB ... A192, A252, A500;API 5L Gr.B spec 1/2.Material:According to NACE MR 0175 standard.Q345, ST35.8 ... X70. X80.Weld standard:According to IPS-M-PI-190(2) standard.ISO3183-3, API Spec 5L PSL2, ISO3183, GB ...