... /A53, GB/T 8162 2. Material: ASTM A106/A53 Gr B, 10, 20, 45, Q345 etc 3. Tolerance: ... A106/A53, GB/T 8162 2. Material: ASTM A106/A53 Gr B, 10, 20, 45, Q345 etc3. Tolerance: by ... : 6M~12M, length can be manufactured by customer requirement.5. Bundling: according to the customer's requirements6. Packing: standard ... : Min 30 Days after Receiving the Payments China high quality GB/T8162 Structural Steel Pipe