Welded steel pipe manufacturing process is simple, efficient, and has more varieties of different specifications, equipment, and less capital, but the general strength of less than seamless. Since the 1930s, with high-quality strip steel rolling production and the rapid development of welding and inspection technology, continuously improving the quality of welds, welded steel pipe specifications increased, and more and more areas instead of non-pipe joints.

1 pipe can be divided according to the basic shape of the Longitudinal seam and spiral welded pipes are two:

(1) straight seam welded pipe: simple production technology, high efficiency, low cost, rapid development. Longitudinal more general industrial use.

(2) spiral welded steel pipe: Longitudinal strength is generally higher than that, which can narrow the larger diameter pipe billet production, you can also use the same width of the billet production of welded pipes of different diameters; but with the same length compared to straight seam pipe, spiral welded steel pipe weld length of 30 to 100%, and lower production rate; Therefore, the smaller diameter pipe actually use straight seam welded, large diameter spiral welded pipe is mostly used.

Cangzhou Shenlong Pipe Manufacturing Co., Ltd. cooperates with Baosteel and Baogang to produce large-caliber seamless steel pipe, straight-seam welded pipe, spiral steel pipe, and pipe fittings. The products comply with API, ASTM, DIN, BS, and JIS standards, and can accept SGS, BV, and other inspections. The products are used in oil, natural gas, bridge, water conservancy, and other large-scale projects, which are worthy of trust.