1. Standard: ASTM A106/A53, GB/T 8162 2. Material: ASTM A106/A53 Gr B, 10, ... 3. Tolerance: by the standard 1. Standard: ASTM A106/A53, GB/T 8162 2. Material: ASTM A106/A53 Gr B, 10 ... . Delivery Time: Min 30 Days after Receiving the Payments China high quality GB/T8162 Structural Steel Pipe