Tianjin Yuheng Steel Co., Ltd.Which is located in Jinghai Industrial Area, Jinghai County, Tianjin is a professional steel pipe manufacturer and supplier in Hot Dipped Galvanized Steel Pipe, ERW Steel Pipe, Square & Rectangular Steel Tube and SSAW Steel Pipe (Spiral Steel Pipe).The transportation is very convenient, we are near to Tianjin Binhai.We are an ISO 9001:2008 certified companyWe covers 60, 000 square meters and have six production lines in producing high frequency welded steel pipe(OD:From 1/2inch to 10inch, Wall thickness from 0.8mm to 12mm), which is basic on the standards:GB/T 3091-2008, BS1387-1987, BS45687, EN39, DIN2440, ASTM A53 etc