Description
Factory-Direct ERW Pipe Pricing — 3 production lines running simultaneously deliver Q195–Q345 ERW round steel pipe at bulk volume pricing with no trading markup, shipped with original mill test certificates.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q235 ERW Round Steel Pipe |
| Product Type | ERW Welded Round Steel Pipe |
| Steel Grade | Q195, Q215, Q235, Q345, 10#, 20#, S235JR, S275JR, S355JR |
| Standard | GB, JIS |
| Section Shape | Round |
| Outer Diameter | 20–200 mm |
| Length | 6 m / 12 m |
| Technique | ERW (Electric Resistance Welded) |
| Surface Treatment | Black Painted / Hot Rolled |
| Tolerance | ±1% |
| Ends | Plain (customizable) |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Oiled or Non-oiled | Non-oiled |
| Invoicing | By Theoretical Weight |
| Application | Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe, Oil Pipe, Chemical Fertilizer Pipe, Structure Pipe |
| MOQ | 25 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Structural framing, scaffolding systems, piling supports |
| Oil & Gas / Petrochemical | Fluid transport lines, gas distribution networks, chemical fertilizer pipelines |
| Machinery & Industrial Equipment | Hydraulic cylinders, boiler tubes, drill pipe casings |
What Dimensional Tolerance Costs on a Bulk ERW Round Steel Pipe Order
A ±1% OD tolerance on a 200 mm pipe means 2 mm of deviation — enough to fail a flange fit-up on a pressure line.
When procurement teams source a Q235 ERW round steel pipe supplier without verifying tolerance control, the downstream costs multiply fast. Pipe ends that don’t align during welding mean field rework, wasted consumables, and schedule slippage on site. On fluid transport projects, even minor OD variation can compromise gasket sealing in flanged joints. We run three-stage in-house inspection on every production batch because I’ve seen entire containers rejected at destination when wall thickness drifted beyond acceptable limits [NEED_CITE: dimensional tolerance requirements for ERW welded steel pipe per GB/T 3091].
Matching ERW Round Pipe to Structural and Fluid Transport Engineering
A Q235 ERW round steel pipe in the 20–200 mm OD range covers the majority of structural framing and medium-pressure fluid conveyance specifications encountered across Southeast Asian and Middle Eastern infrastructure projects. The ERW seam, when produced under controlled parameters, delivers weld integrity comparable to the parent metal — critical for scaffolding load-bearing nodes and hydraulic system connections. Our production lines maintain consistent seam quality across Q195 through Q345 grades, and we supply 6 m and 12 m standard lengths with custom cutting available to reduce on-site waste for contractors managing tight fabrication schedules.
Engineering Compliance and Certification Requirements
Structural applications under EN 1993 require documented material properties and traceable heat numbers — a Q235 ERW round steel pipe supplier must provide mill test certificates linking each batch to its chemical composition and mechanical test results. For projects targeting European markets, CE certification under EN 10210 or EN 10219 becomes a customs clearance prerequisite, not an optional add-on. Surface treatment selection matters equally: black painted finish suits indoor structural use, while hot rolled surface conditions work for applications where downstream galvanizing or coating will be applied. We supply both options and mark every pipe with heat number and grade for full traceability [NEED_CITE: EN 10219 cold-formed welded hollow sections certification requirements].
Steel Grade Selection and ERW Process Fundamentals
The Q-series grades (Q195, Q215, Q235, Q345) follow the Chinese GB standard system where the number indicates minimum yield strength in MPa — Q235 delivers moderate strength suitable for general structural and low-pressure fluid applications, while Q345 steps up for heavier load requirements. The S-series equivalents (S235JR, S275JR, S355JR) align with European EN standards, and specifying the correct grade equivalence avoids procurement delays when project specs reference EN or ASTM frameworks [NEED_CITE: steel grade equivalence mapping between GB Q-series and EN S-series standards]. ERW welding forms the pipe by rolling steel strip into a cylinder and passing high-frequency current through the edges to create the longitudinal seam — this process offers cost advantages over seamless pipe for non-critical pressure applications while maintaining dimensional accuracy within ±1% tolerance. The 10# and 20# carbon steel grades serve boiler and drill pipe applications where specific carbon content controls hardness and machinability. Non-oiled finish means the pipe arrives ready for welding or coating without degreasing steps, reducing fabrication preparation time.
Hidden Costs of Procuring ERW Pipe Without Verified Documentation
Sourcing a Q235 ERW round steel pipe supplier who cannot provide original mill test certificates creates risk across the entire project lifecycle. Material without traceable heat numbers fails third-party inspection at destination, triggering customs holds and demurrage charges. Wall thickness running beyond negative tolerance reduces load-bearing capacity below design specifications — a problem that surfaces only during structural loading tests or, worse, under service conditions. Certification gaps mean re-export or scrap disposal costs. Every batch we ship carries MTC documentation and welcomes SGS or BV inspection before container sealing [NEED_CITE: material traceability and mill test certificate requirements for structural steel pipe].
Why Global Buyers Source ERW Round Pipe from Xin Jiyuan
We operate three production lines running simultaneously with monthly capacity exceeding 20,000 tons, giving bulk buyers reliable fulfillment on large-volume orders without waiting for single-line availability. Factory-direct pricing means no trading company markup — we pass volume discounts to long-term partners on recurring Q235 ERW round steel pipe orders. Every batch ships with original mill test certificates documenting chemical composition and mechanical properties per GB/JIS standards. Our in-house laboratory conducts three-stage inspection covering dimensional checks, weld seam integrity, and surface condition before release. We hold ISO 9001:2015 certification and CE marking under EN 10210/EN 10219 for European market compliance. Custom cutting, punching, and bending services reduce on-site fabrication work for contractors. Professional export documentation and container loading optimization maximize tonnage per shipment, cutting per-ton freight costs for overseas buyers.
Documentation & Compliance
- Mill test certificate documenting Q235 chemical composition and mechanical properties per GB standard, linked to heat number for full traceability
- CE certificate under EN 10210/EN 10219 available for European market structural applications requiring certified hollow sections
- ISO 9001:2015 quality management certificate covering ERW welding process control and dimensional inspection procedures
- SGS or BV third-party inspection report available on request, covering wall thickness, OD tolerance, and weld seam quality verification
- Material traceability documentation linking each pipe to heat number, steel grade, and production batch for project audit compliance
- Complete customs document package including packing list, bill of lading, and certificate of origin for smooth destination clearance
Packaging, Loading & Delivery
- Black painted Q235 ERW round steel pipe bundled with steel strips in seaworthy packaging, with edge protectors preventing surface damage during ocean transit
- Non-oiled hot rolled finish pipes stacked with wooden spacers between layers to maintain surface condition and allow inspection access at destination
- 6 m and 12 m standard lengths optimized for 20ft and 40ft container loading, with professional loading plans maximizing tonnage per container
- Custom cutting service available to deliver project-specific lengths, reducing on-site waste and fabrication time for contractors
- Every pipe marked with heat number, steel grade (Q195/Q235/Q345), and OD/wall thickness for immediate identification during site receiving
- FOB, CIF, and DDP shipping terms available with real-time tracking and professional export documentation handling
Getting Your Q235 ERW Round Steel Pipe Quote
Submit your specifications including outer diameter, wall thickness, steel grade, quantity, and destination port — we respond within 12 hours with factory-direct pricing, delivery schedule, and mill test certificate confirmation. For non-standard dimensions or custom length requirements, share your drawing or specification sheet and we’ll provide a tailored production proposal.
Start Your Bulk ERW Pipe Procurement
Send your requirements via email to admin@sdxinjiyuan.com or contact us on WhatsApp at +86 188 5315 7756 with your specifications and target quantity to receive competitive pricing and documentation details.
