Full-category welded pipe manufacturer | LSAW straight seam submerged arc welded pipe, ERW high-frequency welded pipe, SSAW spiral welded pipe, anti-corrosion galvanized composite pipe, custom-made

Haiqianwei specializes in the research and development and customized manufacturing of LSAW (submerged arc welded) pipes . Its main products include LSAW pipes, anti-corrosion welded pipes, and bimetallic composite pipes.
Leveraging mature LSAW (submerged arc welding) technology, we can produce large-diameter, thick-walled steel pipes for high-pressure applications. Our products possess excellent pressure resistance and fracture toughness, and we can customize pipe diameter, wall thickness, material, and anti-corrosion system according to project requirements.
Corrosion-resistant welded pipes can be treated with anti-corrosion coatings on both the inner and outer walls to extend the long-term service life of the pipeline in soil, seawater, and corrosive media environments. Bimetallic composite pipes adopt a composite structure of base material + corrosion-resistant alloy, which combines high strength and strong corrosion resistance, and are suitable for harsh working conditions such as hydrogen-containing media, oil and gas, chemical industry, and seawater transportation.
We support customized engineering solutions, providing a one-stop service from drawing coordination, material selection, production testing to delivery. Our products are widely used in major projects such as hydrogen pipelines, long-distance oil and gas pipelines, municipal engineering, and chemical fluid transportation.