... GB/T3094-2000 4)Sharp and kind enough Product:High frequency welded steel pipeThickness:0.45-1.5mm,Thick wall 1. ... Shengfang Qianjin Tube-Making Co., Ltd. , which was found in 2000 is a professional and reputed manufacture and exporter,for welded steel tube and ... steel strip. If you are interested in this product,please do not hesitate to contact us. High frequency welded ...