Description
Factory-direct Q195 ERW welded steel pipe manufacturer — Every batch leaves Jinan with original mill test certificates and is available for SGS/BV third-party inspection before container sealing.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q195 ERW Welded Steel Pipe |
| Product Type | Welded Steel Pipe (Straight Seam / Submerged Arc Welded) |
| Steel Grade | Q195, SS400, A36, ASTM A1020, SPHC, St15, St37, St44, St52, S235JR |
| Standard | ASTM, JIS G3101, DIN17100 (EN10025), JIS G3106, EN10111, JIS G3131, DIN1614 |
| Section Shape | Round |
| Size Range | DN15 (21.3 mm) – DN150 (165 mm) |
| Wall Thickness | 2.75 – 5.5 mm (ordinary ≤1.0 MPa / thickened ≤1.6 MPa) |
| Technique | ERW / Laser Welded / Submerged Arc Welded (SAW) |
| Surface Treatment | Hot Rolled / Oiled / Black (Galvanized available per inquiry) |
| Tolerance | ±1% |
| Ends | Plain / Beveled (per request) |
| Application | Fluid transportation / Low-pressure pipeline / Structural support / Scaffolding / Conveyor rollers |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Scaffolding uprights, handrails, temporary structural frames on building sites |
| Mechanical Manufacturing | Belt conveyor rollers, machinery guard frames, equipment support brackets |
| Fluid & Pipeline Engineering | Low-pressure water lines, air supply pipes, drainage conduits in industrial plants |
| Steel Trading & Wholesale | Bulk stock for regional distributors covering DN15–DN150 standard sizes |
What Wall-Thickness Tolerance Costs on a Q195 ERW Welded Steel Pipe Order
A ±1% tolerance gap between catalog claim and caliper reading can turn a 20-ton container into a customs rejection or a site rework.
I spent half a year on a Southeast Asian housing project watching a supervisor measure every straight seam pipe with a caliper. The wall thickness negative tolerance was so far off that theoretical weight and actual weigh-in diverged by a noticeable margin — the entire container was rejected on the spot. Since then, I check wall thickness and weld seam quality on every Q195 ERW welded steel pipe before it leaves the mill. Even if the raw material price is attractive, nothing ships without passing SGS re-inspection. [NEED_CITE: EN 10219 cold-formed hollow section dimensional tolerance requirements]
Global buyers sourcing welded pipes from fragmented suppliers regularly face quality uncertainty, missing mill test certificates, and specification gaps that delay customs clearance. When pipes, plates, and beams come from different vendors, coordination costs multiply and delivery risks compound.
How DN15–DN150 Round Pipes Match Low-Pressure and Structural Applications
The DN15 to DN150 outer diameter range with 2.75–5.5 mm wall thickness covers the majority of low-pressure fluid lines and light structural frames encountered in building sites and conveyor systems. Ordinary wall grades handle pressures up to 1.0 MPa, while thickened wall options extend service to 1.6 MPa — enough for most water supply and compressed air circuits. As a Q195 ERW welded steel pipe manufacturer, we produce both pressure categories on three running lines, keeping standard sizes in ready stock and turning custom orders around within typical production lead times.
Engineering Compliance and Certification Requirements for Welded Round Pipes
Structural applications in Europe require CE marking under EN 10210 or EN 10219, and customs authorities in EU member states routinely block shipments lacking valid factory production control documentation. [NEED_CITE: CE marking requirements for structural steel hollow sections under EN 10210] North American projects specify ASTM grades, and the equivalence between Q195, SS400, A36, and S235JR must be documented on the mill test certificate for engineer approval. Surface treatment choice — black, oiled, or hot-dip galvanized — directly affects corrosion resistance in outdoor scaffolding and coastal conveyor installations. Every Q195 ERW welded steel pipe we supply ships with heat-number traceability and is available for SGS or BV third-party inspection before loading.
Steel Grade Selection and Welding Process for ERW Round Pipes
Q195 sits at the entry point of the Chinese steel grade system, offering adequate formability and weldability for low-pressure pipelines and light structural frames. Its equivalents — SS400 in JIS, A36 in ASTM, and S235JR in EN — share similar yield characteristics, though chemical composition limits vary by standard. [NEED_CITE: steel grade equivalence between GB, JIS, ASTM, and EN systems] ERW (Electric Resistance Welded) process suits the DN15–DN150 diameter range with consistent weld seam quality and competitive cost, while submerged arc welding (SAW) handles thicker walls and higher pressure ratings. Laser welding provides the tightest dimensional control for precision applications. Wall thickness tolerance of ±1% ensures that theoretical weight calculations remain reliable for project cost estimation and structural load analysis.
Hidden Costs of Procuring Welded Pipes Without Proper Certification
Pipes that fail to meet specified wall thickness tolerance trigger rework costs far exceeding the original material savings. Engineering inspectors rejecting scaffolding tubes on-site means project delays, crane re-mobilization fees, and potential structural safety concerns. Missing or incomplete mill test certificates cause customs holds at destination ports, generating demurrage charges and shipment rescheduling. [NEED_CITE: customs clearance requirements for structural steel imports with CE and mill certificates] A Q195 ERW welded steel pipe manufacturer providing original mill certificates and third-party inspection reports eliminates these hidden costs by ensuring every batch is traceable and compliant before it leaves China.
Why Global Buyers Source Q195 ERW Welded Steel Pipe From Xin Jiyuan
Factory-direct pricing means no trading company markup — volume discounts apply for long-term partners placing recurring orders. Our Jinan facility runs three production lines simultaneously with monthly capacity exceeding 20,000 tons, covering over 2,800 specifications across all major steel product categories. Every Q195 ERW welded steel pipe ships with original mill test certificates traceable to heat number, and our in-house laboratory conducts three-stage inspection during production. ISO 9001:2015 and Lloyd’s CE (EN 10210/10219) certifications are held, with SGS or BV third-party inspection available on request. Professional export teams handle documentation, customs clearance, and container loading optimization to maximize payload per shipment. Flexible MOQ from trial orders to full-container bulk quantities supports both new buyers testing the market and established distributors replenishing stock.
Documentation & Compliance
- Mill test certificate documenting Q195 chemical composition and mechanical properties per JIS G3101 and GB/T 700 standards
- CE certificate under EN 10210 and EN 10219 for structural hollow sections entering European markets
- ISO 9001:2015 quality management certificate covering the full production and inspection process
- SGS or BV third-party inspection report available upon request before container sealing
- Material traceability by heat number linking each pipe to its original steel coil and production batch
- Complete customs documentation including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Q195 ERW welded steel pipes bundled with steel strips in seaworthy packaging, with edge protectors for galvanized surfaces to preserve coating integrity during ocean transit
- Black and oiled pipes wrapped in waterproof cloth to prevent surface oxidation during storage and shipping
- Container loading optimized for DN15–DN150 diameter range, maximizing payload per 20ft and 40ft containers with professional lashing plans
- Standard export length pipes available with custom cutting to project-specified dimensions upon request
- Each bundle marked with heat number, steel grade, size, and length for site identification and traceability
- FOB, CIF, and DDP terms available with door-to-door logistics coordination to destination port or project site
How to Request a Quotation for Q195 ERW Welded Steel Pipe
Submit your required specifications including outer diameter, wall thickness, steel grade, quantity, and destination port via email, WhatsApp, or phone. We respond within hours with competitive bulk pricing, mill test certificate confirmation, and typical production lead times. Non-standard sizes and custom lengths are available — share your drawing or project requirements for a tailored proposal.
Get Your Q195 ERW Welded Steel Pipe Quote With Mill Test Certificate
Send your specifications and quantity to receive factory-direct pricing with full documentation.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxinjiyuan.com
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxinjiyuan.com
Frequently Asked Questions
Q: What is the steel grade equivalence between Q195, SS400, A36, and S235JR?
A: These grades share similar yield strength characteristics but differ in chemical composition limits and testing standards. Q195 follows Chinese GB standards, SS400 follows JIS G3101, A36 follows ASTM, and S235JR follows EN 10025. We provide mill test certificates documenting the actual chemical composition and mechanical properties so your engineer can verify compliance with project specifications.
Q: Can you provide SGS or BV third-party inspection before shipment?
A: Yes, SGS and BV third-party inspection is available on request for every batch of Q195 ERW welded steel pipe. The inspection covers dimensional checks, visual weld seam quality, and verification of mill test certificate accuracy. Inspection reports are issued before container sealing and included in your documentation package.
Q: What is the minimum order quantity for custom non-standard sizes outside DN15–DN150?
A: We offer flexible MOQ from trial orders to full-container bulk quantities. Standard sizes in the DN15–DN150 range are kept in ready stock for immediate shipment. Custom non-standard sizes and special wall thickness requirements are produced on our three running lines with typical production lead times — share your specifications for a detailed quotation.
Q: What surface treatment options are available for Q195 ERW welded steel pipe?
A: Standard options include hot rolled, oiled, and black finish. Hot-dip galvanized coating is available per inquiry for applications requiring enhanced corrosion resistance such as outdoor scaffolding, coastal installations, or buried pipelines. Surface treatment choice depends on your operating environment and project specifications.
Q: What documents are included with each shipment?
A: Every shipment includes original mill test certificates traceable to heat number, packing list, bill of lading, and certificate of origin. CE certificates under EN 10210/EN10219 are provided for European market shipments. SGS or BV third-party inspection reports are included when requested. All documentation is prepared by our professional export team to ensure smooth customs clearance at destination.
Start Your Q195 ERW Welded Steel Pipe Order Today
Share your project specifications and quantity to receive factory-direct pricing with complete mill test certificates and third-party inspection options.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxinjiyuan.com
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxinjiyuan.com
