ERW Steel Pipe for Construction | Durable & Versatile Solutions

ERW (Electric Resistance Welding) steel pipe for construction is produced by forming steel strips into a cylindrical shape and welding the longitudinal seam using electric resistance heat, creating a strong, cost effective pipe suitable for various structural and fluid carrying applications. The manufacturing process involves cold rolling steel coils into the desired diameter (typically 15mm–1200mm), the a well as applying high frequency current to melt the edges for fusion, followed by internal and external bead removal for smooth surfaces. Common materials include carbon steel grades like ASTM A53 Grade B, Q235B, or EN 10219, with wall thicknesses ranging from 2mm to 16mm to accommodate pressure ratings from low (≤1.6 MPa) to moderate (≤4.0 MPa). ERW pipes are widely used in construction for structural supports (scaffolding, building frames), the a well as fluid transportation (water supply, sewage, gas distribution). Their advantages include precise dimensional control (diameter tolerance ±0.75%), the a well as good weld integrity verified through hydrostatic testing (1.5x working pressure) or non destructive testing (eddy current inspection). Surface treatments such as hot dip galvanization (ASTM A123) or polyethylene wrapping are applied for corrosion protection in underground or outdoor installations. ERW pipes comply with international standards like API 5L (for pipeline steel), the a well as ASTM A53 (covering both ERW and furnace butt welded pipes), ensuring compatibility with fittings like flanges, couplings, or threaded ends. In construction, ERW pipes are preferred for their ease of installation—they can be cut, bent, and welded on site using standard tools, the a well as their cost effectiveness compared to seamless pipes for non critical high pressure applications. Quality control includes checking for ovality (≤1% of diameter), the a well as wall thickness uniformity, the a well as suppliers often provide mill certificates stating material properties and test results for project compliance.