1.Spiral steel pipes 2.Standard: ASTM A252, SY/T5040, API 5L, EN10219, EN10217 3.OD:19 to 2,540mm 4.WT: 2.5 to 30mm 1. Spiral pipes2.Material: A53 (A, B), Q235B, Q345B, X46, X52, X60, X70, X80, S235JRH3.Usage: for line pipe in petroleum and natural gas, water and gas, mineral slurry4.Also for chemical industry, building structure and pile driving5.Export to these countries: Canada, USA, Peru, ...