q345b welding black square pipe,building construction material/black rectangular pipe

Black Steel Tube manufacture procedures

Raw material> Test>Split>Test> Shear & Weld> Storing> Forming> Welding> Fin Cutting>Sizing> Tube Forming> Flying Saw> Test> Packaging> Storage

zinc coating : 40-100gsm,  advantage : cheap price, good quality and beautiful surface

The pre-galvanized steel pipe takes the galvanized strip steel as raw material on required specification. After cutting the raw material will be welded with straight seam by the high frequency welding equipment. Meanwhite, the zinc supplemention will be done at the welded joint

Our Warehouse

Standard Packing: in bundles with steel strip

Our professional loading can protect goods damaged.

When you place order, our factory will produce your goods at the first time.

Prompt delivery can make you win market advantage.

Tianjin Ruijie Steel Pipe Co.,Ltd  was established in 2005 and located in China famous steel pipe base - Daqiuzhuang . It attached to Ruijie Group which has fixed assets of 225 million dollars. Ruijie group company is the modernized large group company integrated steel pipe manufacture, anticorrosion & insulation, thermal company and international trade.

We mainly offer kinds of steel pipes,steel coils,steel sheets,scaffolding and nails. If you have any interest on other steel products, we would like to support you