Straight seam steel pipe is a spiral seam steel pipe with strip coil as raw material, extruded at constant temperature and welded by the automatic double-wire double-sided submerged arc welding process. The spiral steel pipe sends the strip steel to the welding pipe set, and after rolling with multiple rolls, the strip steel gradually rolls up to form a circular tube blank with an opening gap. The pressure of the extrusion roller is adjusted so that the weld gap is controlled within 1~3mm and the two ends of the welding joint are flush. Steel pipe transportation and railway, highway, water transport, shipping and are listed as one of the five transportation industries. Straight seam steel pipe is widely used in the chemical industry, petroleum, electric power, metallurgy, urban gas and heating system, high temperature, corrosive, toxic and radioactive medium important tasks, and the application of straight seam steel pipe quantity and quality plays an important role.

How to weld the best-welded steel pipe?

(1) Strip steelhead to tail butt, single wire or double wire submerged arc welding, automatic submerged arc welding after coil steel pipe repair welding.

(2) The weld gap control device is adapted to meet the welding requirements, and the pipe diameter, the amount of the wrong side, and the weld gap are strictly controlled.

(3) Both inner and outer welding adopts Lincoln welding machine for single-wire or double-wire submerged arc welding, so as to obtain stable welding quality.

(4) Before forming, strip steel is straightened, edged, planing, surface cleaned, conveyed, and bent.

(5) The electric contact pressure gauge is used to control the pressure of the oil cylinder on both sides of the conveyor to ensure the smooth transmission of the strip steel.

(6) Raw materials, namely strip coil, welding wire, and flux. Strict physical and chemical tests must be carried out before being put into operation.

(7) Adopt external control or internal control roller forming.

The application of the straight seam steel pipe is extremely wide since the civil sector has been in the state of division management, all lines of the straight seam steel pipe manufacturing, installation, inspection, operation management of each link of the system, and the stability technology are different, the stable management of the straight seam steel pipe relative to the straight seam steel pipe boiler, straight seam steel pipe pressure vessel in laws, regulations, standards tend to.

The pipe is composed of straight-seam steel pipe and pipe supporting parts. Used to transport, distribute, control, or stop the flow of fluid. Straight seam steel pipe is a kind of steel pipe welding process opposite to spiral steel pipe. This kind of steel pipe welding process is relatively simple, and the welding cost is relatively low, in the production time can reach a high rate, so it is relatively common in the market. And it is a widely used product, this steel pipe is welded with the longitudinal parallel welding method of steel pipe, but also widely used. With the same diameter and length, the welding length of straight seam steel pipe is much less, while the welding length of spiral steel pipe may increase by more than 30%. In the welding process due to these reasons, the rate is relatively low, and the yield is also quite low. But the same blank, the general spiral welded pipe can be obtained in a variety of diameter products. In contrast, straight-seam steel pipe can not achieve this welding effect. Straight-seam steel pipe is widely used in the market because of its special characteristics. Because the process cost is relatively low when welding, and the production process of forged steel, extrusion, rolling, and drawing steel can be manufactured, and the specifications are determined, so it provides the possibility for a wide range of applications.

Cangzhou Shenlong Pipe is specialized in the production of straight seam steel pipe, product quality control is strict, and fast delivery is the qualified supplier of PetroChina, and BP oil.