Steel Welded Pipe
TAG：Longitudinal Welded Steel Pipe High Frequency Welded Steel Pipe Electric Resistance Welded Pipe (ERW Pipe)
Steel Welded Pipe refers to cylindrical steel tubing manufactured by forming flat steel plates or hot-rolled strips into round,square,or rectangular profiles,then fusing the seam via high-frequency electric resistance welding(ERW),longitudi...
Steel Welded Pipe refers to cylindrical steel tubing manufactured by forming flat steel plates or hot-rolled strips into round,square,or rectangular profiles,then fusing the seam via high-frequency electric resistance welding(ERW),longitudinal submerged arc welding(LSAW),or spiral submerged arc welding(SSAW)under controlled heat and pressure.Unlike seamless steel pipes made from solid billets,welded pipes offer greater flexibility in size,faster production cycles,and lower overall costs,while modern welding and non-destructive testing(NDT)technologies ensure weld integrity meets the most stringent global standards.
Main Types&Features
ERW(Electric Resistance Welded Pipe):High-frequency welding process,uniform wall thickness,high dimensional precision,cost-effective.Suitable for medium-small diameters,low-to-medium pressure fluid transport,structural applications.
LSAW(Longitudinal Submerged Arc Welded Pipe):Single heavy plate as raw material,straight longitudinal seam,ideal for large diameters and thick walls.Widely used in high-pressure oil/gas transmission and heavy construction projects.
SSAW(Spiral Submerged Arc Welded Pipe):Spiral seam structure,excellent hoop strength and pressure-bearing capacity.Can produce large-diameter pipes from narrow strips;commonly applied to long-distance pipelines,bridge piles,and offshore engineering.
Galvanized Welded Pipe(Hot-dip/Electro-galvanized):Surface zinc coating significantly improves corrosion resistance,perfect for water supply,fire protection systems,agricultural irrigation,and outdoor fencing.
Stainless Steel Welded Pipe:Made of 304,316L and other grades,outstanding corrosion resistance for chemical,food,pharmaceutical and marine environments.
Materials,Specifications&Standards
Materials:Carbon steel(Q235,Q355,A53 Grade A/B),alloy steel,stainless steel,etc.Custom grades available for extreme temperature/pressure or corrosive conditions.
Dimensions:Diameters range from½inch(12.7mm)up to 60+inches(1500mm+);wall thicknesses follow SCH10 to SCH160,with customized heavy walls for structural use.Standard lengths are 6m,12m,or cut-to-order sizes.
Global Standards:ASTM A53,API 5L,EN 10219,EN 10210,GB/T 3091,AS/NZS 1163,ensuring compatibility across international projects.
Key Advantages
Cost Efficiency:Lower raw material and production costs compared to seamless pipes,especially for large-diameter,high-volume orders.
Dimensional Versatility:On-demand production of non-standard diameters and wall thicknesses to fit specific project requirements.
High Structural Integrity:Modern welding processes plus NDT inspections(ultrasonic testing,X-ray,hydrostatic pressure testing)guarantee weld strength and leak-proof performance.
Scalability:Mass production capability to meet tight deadlines for large infrastructure projects.
Typical Applications
Energy&Utilities:Oil,gas,and water transmission pipelines;power plant cooling/steam systems.
Construction&Infrastructure:Scaffolding,building columns,curtain wall supports,bridge structures,pile casings.
Mechanical&Industrial:Hydraulic cylinders,conveyor rollers,automobile exhaust pipes,machinery frames.
Municipal Engineering:Fire protection networks,sewage treatment pipelines,urban heating systems,irrigation pipes.
Surface Treatments&Customization
Coatings:Fusion-bonded epoxy(FBE),3PE anti-corrosion coating,cement mortar lining,polyurethane spray.
Surface finishes:Galvanized,black(as-welded),pickled and passivated,painted.
Value-added services:Cutting,threading,beveling,flanging,custom fabrication per client drawings.
