Tianjin Huilitong Steel Tube Co., Ltd. is a professional manufacturer of ERW steel pipes, SSAW steel pipes and Square/Rectangular steel pipes. We own the most advanced automation cold-formed forming machine and high-frequency straight resistance welding machine at home and abroad.we can produce ERW steel pipes vary from 88.9mm (3") to 457mm (18"), SSAW steel pipes vary from 219mm (8') to 2020mm. (80"), Square/Rectangle pipes vary from 15*15*0.5mm to 400*200*13mm. Our products are strictly conducted according to GB/T 3091-2001, GB/T 9711.1-1997, API 5L/5CT, EN10219, ASTM A53, ASTM A500 and other equivalent standards. Our products are widely used for the transmission of petroleum and natural gas. They can also be used for building construction, water conveying, steel structure, shipbuilding, farm vehicle, the railway and highway guardrail, container framework, furniture, decoration and other related industries. Besides domestic sales of 15% total output, our products have gone 26 countries and regions in the world. We can make sure that it is must be your best choice to choose our products and excellent services.