Lan Ming Tianjin Steel Manufacturing Co., Ltd. was established in 2007, mainly produces and sells two-sided submerged arc spiral (Executive GB/T9711.1-1997 and SY/T5037-2000 of-standard), welded pipe, hot dip galvanized pipes, scaffolding tubes (execution of GB/T12793 and the GB/T3092) large-diameter longitudinal welded pipes (Executive GB/T3091-2001 standard), square pipe, rectangular pipe (GB/T6728-2002), the products have passed the ISO9001-2000 international quality system certificationswidely used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction, oil bridges water supply, construction scaffold, machinery tubes. We always adhere to the fundamental quality, and to cooperate in good faith for the purpose, welcome new and old customers to come with the purchase!