Welded Round Steel Pipe – Cost-effective carbon steel pipe for structural and fluid applications.
Multiple Steel Grades – ASTM A53, A500, API 5L, Q235/Q355 and EN grades available.
Custom Pipe Sizes – OD, wall thickness, length and pipe-end preparation can be customized.
Surface Processing Available – Black, oiled, painted, galvanized and coated finishes supported.
Complete Export Documents – MTC, COO and full commercial and shipping documentation available.
Carbon Steel Welded Pipe is a round hollow steel product manufactured by forming steel strip, coil or plate into a cylindrical shape and joining the longitudinal or spiral edges through a controlled welding process.
Welded round pipe provides an economical solution for structural fabrication, fluid transportation, machinery, fencing, scaffolding, steel structures, agricultural equipment and general industrial applications.
Henan GDD supplies welded carbon steel pipes in multiple ASTM, API, EN and Chinese grades. Outside diameter, wall thickness, fixed length, surface treatment, pipe ends and additional processing can be customized according to project drawings and purchase specifications.
| Item | Specification |
|---|---|
| Product Name | Carbon Steel Welded Pipe / Welded Round Steel Pipe |
| Manufacturing Process | ERW, HFW, LSAW, SSAW or Other Welded Process According to Pipe Size and Specification |
| Common Grades | Q195, Q215, Q235B, Q355B, ASTM A53 Gr.B, ASTM A500 Gr.B/Gr.C, API 5L Gr.B, S235JR/S235JRH, S355JR/S355J2H or Equivalent |
| Common Standards | ASTM A53/A53M, ASTM A500/A500M, API 5L, EN 10219, EN 10217, GB/T 3091 or Customer Specification |
| Outside Diameter | Approximately 10 mm – 610 mm for Common Welded Round Pipe; Larger Sizes Available Subject to Welding Process and Mill Capability |
| Wall Thickness | Approximately 0.6 mm – 30 mm or Customized According to OD and Manufacturing Process |
| Length | 5.8 m, 6 m, 9 m, 11.8 m, 12 m, Random Length or Customized |
| Section Shape | Round |
| Surface | Black, Bare, Oiled, Primer Painted, Powder Coated, Hot-dip Galvanized or Customized |
| End Type | Plain End, Beveled End, Threaded End, Grooved End or Customized |
| Processing Service | Cutting, Beveling, Threading, Grooving, Drilling, Welding, Painting and Galvanizing |
| Weld Inspection | Visual Inspection, Dimensional Check, Hydrostatic Test, Eddy Current/UT or Other NDT Where Required by Standard or Contract |
| MTC | Mill Test Certificate / EN 10204 3.1 Where Applicable to the Ordered Material |
| Applications | Structures, Construction, Water Lines, Fluid Transmission, Fencing, Scaffolding, Machinery, Steel Fabrication and Industrial Piping |
| Available Documents | MTC, Certificate of Origin, Export License Where Applicable, Commercial Invoice, Packing List, Bill of Lading and Customs Documents |
| Packing | Steel Bundles, Reinforced Steel Straps, End Protection, Waterproof Wrapping or Customized Seaworthy Export Packing |
| Trade Terms | EXW, FOB, CFR, CIF |
Available grades, dimensional ranges, tolerances and testing requirements depend on the applicable standard and manufacturing process. Final specifications should be confirmed through the purchase order, technical agreement and corresponding Mill Test Certificate.
Carbon Steel Welded Pipe is manufactured from steel strip, coil or plate rather than directly from a pierced solid billet.
The steel is progressively formed into a round section, after which the edges are joined through a controlled welding process. Depending on diameter and application, the process can use ERW, HFW, longitudinal submerged arc welding or spiral submerged arc welding.
Modern welded-pipe production allows high dimensional consistency, efficient mass production and competitive material cost across a broad range of structural and industrial applications.
ERW means Electric Resistance Welded. It is one of the most widely used manufacturing methods for small- and medium-diameter carbon steel round pipes.
During production, steel strip or coil is continuously formed into a cylindrical shape. Electrical resistance heating is concentrated at the strip edges, and controlled pressure forms the longitudinal weld.
ERW pipes are widely used for structural fabrication, water transportation, fencing, scaffolding, machinery and general industrial applications.
HFW refers to High Frequency Welding and is commonly used in modern welded-pipe production.
High-frequency electrical energy heats the strip edges before they are forged together under pressure, producing a continuous longitudinal joint.
Production parameters, weld-zone treatment and inspection requirements depend on the applicable material standard and intended service.
For larger outside diameters and heavier wall requirements, LSAW or SSAW production routes can be considered.
LSAW uses a longitudinal submerged arc welded seam and is commonly considered for large-diameter pipeline and structural projects.
SSAW uses a spiral-forming and submerged arc welding process and is commonly used for large-diameter water, piling and pipeline applications.
Actual manufacturing-route availability should be confirmed according to the required OD, wall thickness, grade, standard and quantity.
The main difference between welded and seamless pipe is the manufacturing route.
Welded pipe is formed from steel strip, coil or plate and contains a controlled weld seam. Seamless pipe is produced from a solid billet without a longitudinal weld.
Welded pipe is often more economical and provides strong dimensional consistency for structural, water, fabrication and general industrial applications.
Seamless pipe may be specified for selected high-pressure, high-temperature or specialized services. The correct choice should always follow the applicable engineering code and project specification.
ASTM A53 is widely specified for carbon steel pipe used in mechanical, pressure and general-purpose applications.
ASTM A53 Grade B ERW pipe is commonly requested for water systems, industrial piping, fabrication and construction.
Customers should specify grade, type, schedule, surface condition, end preparation and testing requirements according to ASTM A53/A53M and the project specification.
ASTM A500 covers cold-formed welded and seamless carbon steel structural tubing in round and other hollow shapes.
ASTM A500 round welded tubes are widely used for structural frames, columns, supports, machinery, guardrails and fabricated steel assemblies.
Structural designers should specify the required grade, dimensions, wall thickness and design properties according to the applicable project documents.
API 5L covers steel line pipe used in pipeline transportation systems within the petroleum and natural gas industries.
Welded API 5L pipe can be produced using suitable ERW/HFW or submerged arc welding processes according to diameter and grade.
Grade, product specification level, dimensions, testing and documentation should be confirmed according to the applicable API 5L edition and customer specification.
Round welded steel pipe is widely used in steel structures because it provides efficient material usage, clean geometry and convenient welding and fabrication.
Common applications include columns, trusses, frames, handrails, supports, warehouses, platforms and equipment structures.
Structural suitability and load capacity should always be confirmed by the project engineer according to section properties, steel grade, connection design and applicable building code.
Machinery manufacturers use welded round tubing for machine frames, rollers, guards, support members and fabricated equipment.
In these applications, OD tolerance, wall thickness, straightness, surface condition and weld quality can be important selection factors.
Fixed-length cutting, drilling and other fabrication services can be discussed according to drawings and production capability.
Suitable welded carbon steel pipe can be used for water distribution and other fluid-transmission systems according to the applicable standard.
Wall thickness, coating, connection method and testing should be selected according to design pressure, installation conditions and service environment.
Hydrostatic or applicable non-destructive testing can be specified where required by the material standard or purchase contract.
Carbon steel welded round pipe is commonly used for fence posts, rails, barriers, gates and guardrail structures.
Black, painted or hot-dip galvanized finishes can be selected according to appearance and corrosion-protection requirements.
Customized fixed lengths can reduce cutting operations during fence or railing installation.
Welded round steel tubes are widely used in scaffolding systems and temporary construction structures where the correct grade, dimensions and system approvals are specified.
Common requirements can include controlled outside diameter, wall thickness, fixed length, straightness and galvanized or painted surface treatment.
Scaffolding components should always comply with the applicable system design, safety standard and engineering requirements of the destination market.
Black welded pipe is supplied without a zinc coating and retains the typical dark steel surface from production and handling.
It is widely used for fabrication, structural supports, machinery and applications where additional coating will be applied after fabrication.
Temporary anti-rust oil or primer can be applied when additional storage or transportation protection is required.
Welded carbon steel pipe can be hot-dip galvanized after production to improve corrosion protection for outdoor and humid environments.
Galvanized welded pipe is widely used for fencing, greenhouse frames, structural supports, outdoor equipment and selected fluid applications.
Zinc coating requirements, surface appearance and applicable galvanizing standard should be confirmed when placing an order.
Primer painting and other protective coating systems can be applied where customers require additional corrosion protection or specific surface appearance.
Red oxide primer, black coating and other project-specific finishes can be discussed according to application requirements.
Coating type and dry-film requirements should be confirmed before production for projects with specified corrosion-protection systems.
Welded round steel pipe can be specified using exact outside diameter and wall thickness or according to nominal pipe size and schedule for applicable piping standards.
Pipe weight, inside diameter and structural section properties change significantly as wall thickness changes.
Customers should provide the exact OD, wall thickness, length and applicable tolerance whenever possible to avoid specification ambiguity.
Piping applications may specify standard wall thicknesses through schedule designations such as SCH 20, SCH 40 and SCH 80.
A schedule number does not represent one fixed wall thickness for every pipe diameter. Actual wall thickness depends on the corresponding nominal pipe size and dimensional standard.
For quotation, customers can provide NPS + schedule or the exact OD × wall thickness specification.
Plain ends are commonly supplied for structural fabrication and general welding.
Beveled ends can be prepared for suitable butt-welded piping systems, while threaded or grooved ends can be supplied where the pipe size and applicable connection standard allow.
Plastic or metal end caps can also be added to protect prepared pipe ends during transportation.
Carbon Steel Welded Pipe can be cut to customized fixed lengths according to machinery, structural and fabrication drawings.
Additional services can include beveling, threading, grooving, drilling, hole punching and selected welding operations.
Customers should provide drawings and dimensional tolerances where finished fabrication is required.
A typical steel-fabrication customer requires welded round pipes in several diameters for frames, columns and support structures.
During quotation, the key information includes steel grade, OD, wall thickness, fixed length, black or painted surface and required dimensional tolerances.
For multiple-size projects, Henan GDD can organize bundles by specification and provide clear package markings to simplify warehouse receiving and fabrication.
A fencing or agricultural-structure buyer may require welded round tubes with hot-dip galvanized surfaces for outdoor installation.
The main confirmation points include outside diameter, wall thickness, zinc coating, fixed length and whether tube ends require caps or additional processing.
A pipe distributor may purchase ASTM A53 Grade B ERW pipes in several nominal sizes for water and general industrial systems.
For this application, schedule, pipe-end condition, hydrostatic or NDT requirements, MTC and bundle marking are confirmed before shipment.
Customer names, confidential pricing and proprietary project documents are not published without authorization.
The welded joint is one of the principal inspection areas in welded-pipe production.
Production parameters must be controlled to maintain consistent weld formation along the pipe length.
Depending on the applicable standard, inspection can include visual examination, dimensional checks, hydrostatic testing and selected non-destructive testing methods.
Specific testing methods and acceptance criteria should be identified in the purchase specification before production.
Inspection can include outside diameter, wall thickness, length, straightness, ovality and end condition according to the ordered specification.
Surface checks can identify excessive rust, dents, scratches, coating damage and other visible conditions.
For galvanized or painted pipes, the relevant surface and coating requirements can also be inspected according to the contract.
Mill Test Certificates help verify the material grade and production batch supplied for the order.
Depending on the applicable specification, MTC information can include heat number, chemical composition, mechanical properties, dimensions and relevant test results.
Pipe markings and bundle identification can be linked to the corresponding production and material documentation according to mill practice.
EN 10204 3.1 documentation can be provided where applicable to the ordered material and contract requirements.
Independent third-party inspection can be arranged according to the scope confirmed in the purchase contract.
Inspection can cover dimensions, markings, quantity, surface condition, MTC review, packing and loading.
Where witnessing of hydrostatic or non-destructive testing is required, the testing method, acceptance criteria and timing should be agreed before production.
Henan GDD supports compliant international export with technical, commercial and customs documentation prepared according to destination-country and contract requirements.
Available documents can include Mill Test Certificate, Certificate of Origin, export license where applicable, commercial invoice, packing list, bill of lading and customs declaration documents.
Product photographs, pipe-marking photographs, packing photographs, loading photographs and agreed third-party inspection reports can also be provided.
Destination-specific legalization, chamber endorsement and other special documentation requirements should be confirmed before order placement.
Welded steel pipes are normally packed in reinforced bundles with steel straps for convenient lifting and transportation.
Smaller-diameter pipes can be arranged in hexagonal or standard bundles according to customer requirements.
Waterproof wrapping, end caps and additional anti-rust protection can be applied where required by shipping route or storage conditions.
Bundle tags can identify grade, size, length, heat or batch number, quantity, net weight and customer shipping marks.
Henan GDD supplies Carbon Steel Welded Pipe to structural fabricators, construction companies, machinery manufacturers, pipeline distributors, fencing suppliers and industrial project customers.
We support ASTM A53, ASTM A500, API 5L, EN 10219, Q235, Q355 and other commonly required welded-pipe specifications.
Outside diameter, wall thickness, fixed length, surface treatment and end preparation can be customized according to project requirements.
Existing MTCs, material specifications, MTO lists and drawings can be reviewed before quotation to improve specification matching.
MTC, Certificate of Origin, export license where applicable and complete commercial and shipping documentation can be provided according to contract requirements.
Carbon Steel Welded Pipe is manufactured by forming carbon steel strip, coil or plate into a round shape and joining the edges through a controlled welding process.
ERW means Electric Resistance Welded pipe. It uses electrical resistance heating and pressure to join the longitudinal edges of formed steel strip.
Common grades include Q235B, Q355B, ASTM A53 Gr.B, ASTM A500 Gr.B/Gr.C, API 5L Gr.B, S235 and S355 series according to order requirements.
Common welded round pipes can be supplied from approximately 10 mm to 610 mm outside diameter, with larger diameters available through suitable welded-pipe processes subject to mill capability.
Yes. Hot-dip galvanized, painted, oiled and other surface-treatment options can be arranged according to the application.
Yes. MTC, Certificate of Origin, export license where applicable, commercial invoice, packing list, bill of lading and other agreed export documentation can be provided.
Please provide the standard, grade, outside diameter, wall thickness or schedule, length, surface finish, pipe-end type, quantity, destination port and required documents.
Yes. Third-party inspection can be arranged according to the inspection scope agreed in the purchase contract.
Looking for Carbon Steel Welded Pipe for structural fabrication, construction, water lines, fencing, machinery or industrial piping?
Send Henan GDD your required standard, grade, OD, wall thickness or schedule, length, surface treatment, pipe-end requirement, quantity, destination port and required documentation.
If you are replacing an existing supplier or purchasing for an engineering project, you can also send your current MTC, MTO/BOM, pipe specification or technical drawing for comparison and quotation.
