Double-sided spiral submerged arc spiral pipe welding technology

Using double-sided spiral submerged arc spiral pipe welding technology, the narrowband (board) volume continuous welded steel pipe. In our natural gas and other long-distance gas pipeline project has been widely used, is our long-distance gas pipeline project using the main tube.

Spiral steel pipes are widely used in natural gas, petroleum, chemical, electric power, heat, water, steam heating, hydropower penstock, power, water and other long-distance pipelines and piling, dredging, bridges, steel and other engineering fields.

Spiral Pipe thermal fatigue stability generally refers to work in hot and cold alternating cracks under the action of the ability to resist. Of cold, heat generated by alternating said thermal fatigue crack crack. In the mold die casting, forging die thermal fatigue scrapped mainly due to poor stability are prone to thermal fatigue cracking. For the mold steel, its stability is mainly determined by the thermal fatigue toughness and strength. Therefore, stability, good thermal fatigue mold steel must have good toughness and high strength (wet strength) a good fit.

Spiral steel pipe surface by high velocity impact and turbulence of the fluid-like, and to abrasion and corrosion damage, known corrosion and wear. Impact corrosion is the main form of wear and corrosion resistance. Spiral steel pipe under the impact of high-speed fluid, the protective film damage, break at the bare metal accelerate corrosion. If the fluid contains solid particles, spiral steel pipe corrosion and wear is even more serious. Its exterior features are: localized grooves, corrugated, round and valleys shaped, usually show directionality. Exposed to the movement of fluid in equipment such as: pipes, tees, valves, blowers, centrifuges, impellers, heat exchangers, exhaust duct, etc. can have an impact corrosion. Soft metals such as copper and lead more serious.