Secondary Or Not: Non-alloy Special Pipe: Thick Wall Pipe Surface Treatment: Galvanized Certification: BSI Technique: Hot Rolled Application: Fluid Pipe Place of Origin: Tianjin, China (Mainland) Zinc: 300-500g/m2 Section Shape: Round Thickness: 1.5 - 5.75mm Length: 4-12m Outer Diameter: 1/2"-8"mm Grade: Q195,Q235,Q345,20#,45# Standard: ASTM A53-2007,ASTM A106-2006 , A500, BS1387