Description
Factory-direct pricing, no trading markup — GR.B ERW steel pipes with 3PE anti-corrosion coating ship directly from our Jinan production base to your project site, eliminating intermediary margins on every meter.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | GR.B ERW Steel Pipe with 3PE Anti-Corrosion Coating |
| Product Type | ERW Welded Steel Pipe |
| Steel Grade | GR.B |
| Standard | ASTM, API |
| Section Shape | Round |
| Wall Thickness | 2–36 mm |
| Length | 5.8–12 m (6 m / 6.4 m / 12 m available) |
| Technique | ERW (Electric Resistance Welded) |
| Surface Treatment | 3PE Anti-Corrosion Coating |
| Tolerance | ±1% |
| Ends | Plain (as supplied) |
| Oiled or Non-oiled | Non-oiled |
| Application | Oil & gas transport / Fluid pipeline / Sewage transport / Industrial fluid conveyance |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas EPC | Onshore and offshore transmission pipelines, gathering lines, flow lines |
| Municipal Infrastructure | Industrial sewage conveyance, water distribution mains, drainage systems |
| Petrochemical | Process fluid distribution networks, cooling water lines, utility piping |
| Industrial Construction | Plant piping racks, fire water ring mains, compressed air lines |
Why 3PE Adhesion Pull-Off Tests Decide Whether Your Pipeline Survives First Winter
Holiday detection at 25 kV and adhesion pull-off before loading — not after arrival.
I watched a Dubai Big 5 client open a container to find 3PE coating peeling off 6-meter GR.B ERW steel pipe lengths like a banana skin. The peel test failed across the entire batch. Half a container was scrapped at destination because the supplier skipped adhesion testing at the factory and relied on visual inspection alone. When you source an API GR.B ERW steel pipe 3PE anti-corrosion supplier, the difference between a pipeline that lasts 25 years and one that corrodes in 25 months comes down to whether the epoxy primer was applied within the specified pot life window and whether the polyethylene outer layer was extruded at the correct melt temperature. [NEED_CITE: 3PE coating system adhesion requirements per ISO 21809-1]
Matching GR.B ERW Pipe to Pipeline Operating Conditions
GR.B steel grade meets API 5L and ASTM specifications for moderate-pressure oil, gas, and water transmission pipelines, making the API GR.B ERW steel pipe 3PE anti-corrosion supplier choice straightforward for EPC contractors working on gathering lines and distribution networks. The ERW welding process produces a consistent weld seam with ±1% dimensional tolerance across wall thicknesses from 2 mm to 36 mm, covering the majority of pipeline specifications without requiring seamless alternatives at higher cost. Our in-house physical and chemical laboratory tests every heat for chemical composition and mechanical properties before the pipe ever reaches the 3PE coating line, ensuring the steel substrate meets the surface preparation requirements that polyethylene adhesion depends on.
Engineering Compliance and Certification for Cross-Border Pipeline Projects
Pipeline projects crossing international borders require documentation that satisfies both the importing country’s customs authority and the project owner’s engineering specification. The API GR.B ERW steel pipe 3PE anti-corrosion supplier must provide Mill Test Certificates documenting chemical composition and mechanical properties per API 5L Grade B requirements, along with CE certification under EN 10210/10219 for European project compliance and ISO 9001:2015 quality management system certification. [NEED_CITE: API 5L specification requirements for Grade B line pipe] Third-party inspection through SGS or BV provides independent verification before shipment, preventing the customs delays and material rejection scenarios that plague fragmented procurement from uncertified sources. Standard lengths of 6 m, 6.4 m, and 12 m align with container loading optimization and reduce field welding joints on-site.
Understanding GR.B Steel Grade and ERW Welding for Pipeline Service
GR.B is a carbon steel grade specified under API 5L and ASTM standards for line pipe service, offering adequate strength for moderate-pressure oil, gas, and water transmission without the premium cost of higher grades like X42 or X52. The ERW (Electric Resistance Welded) process forms the pipe by rolling steel coil into a cylindrical shape and passing high-frequency current through the edges to create a forge weld, producing a consistent seam with tight dimensional control suitable for pipeline applications where internal surface smoothness affects flow efficiency. The 3PE (3-Layer Polyethylene) anti-corrosion coating system applies a fusion-bonded epoxy primer for adhesion to the steel substrate, a copolymer adhesive intermediate layer, and an extruded polyethylene outer layer for mechanical protection and moisture barrier — delivering superior corrosion resistance compared to single-layer FBE or bitumen coatings in buried or submerged pipeline service. Wall thickness tolerance of ±1% ensures that theoretical weight calculations match actual delivered weight, preventing disputes over material quantity at project handover.
Hidden Costs When Coating Adhesion Fails at Destination
Ordering from an API GR.B ERW steel pipe 3PE anti-corrosion supplier without verified adhesion testing and holiday detection protocols creates exposure to coating disbondment, underfilm corrosion, and premature pipeline failure that only becomes visible after burial or submersion. Material substitution — receiving a lower steel grade than specified — triggers engineering re-evaluation, potential redesign, and project delays that dwarf the initial cost savings from choosing the lowest quoted price. Missing or incomplete Mill Test Certificates cause customs holds at destination ports, generating demurrage charges and storage fees that accumulate daily until documentation is resolved. [NEED_CITE: consequences of non-compliant pipeline coating systems per NACE SP0169]
Procurement Confidence from Factory-Direct Pipeline Pipe Supply
Our Jinan production facility operates three dedicated ERW pipe production lines with in-house physical and chemical laboratories conducting incoming raw material inspection, in-process weld seam verification, and final coating adhesion testing before every shipment. We hold 41 invention patents including proprietary technologies for specialized pipe configurations, and our products carry CE certification under EN 10210/10219, Lloyd’s Register EU CE marking, Singapore FPC certification, and verification through SGS and BV third-party inspection. With 2,800+ specifications available across our product range and wall thicknesses up to 40 mm, we supply custom non-standard sizes and lengths without the high minimum order quantities that trading companies impose. Our professional international business team manages door-to-door logistics including container loading optimization, professional lashing for heavy pipe cargo, and real-time shipment tracking to 50+ countries across the EU, North America, Middle East, India, and Southeast Asia.
Documentation & Compliance
- Mill Test Certificate documenting GR.B chemical composition (carbon, manganese, phosphorus, sulfur) and mechanical properties per API 5L Grade B requirements
- CE certificate under EN 10210/10219 for European project compliance and customs clearance
- ISO 9001:2015 quality management system certificate covering the full production and coating process
- SGS or BV third-party inspection report verifying coating thickness, adhesion pull-off strength, and holiday detection results
- Material traceability by heat number linking each pipe to its Mill Test Certificate and production batch
- Customs documentation package including packing list, Bill of Lading, and Certificate of Origin for destination port clearance
Packaging, Loading & Delivery
- GR.B ERW pipes bundled with steel strips and edge protectors to preserve the 3PE polyethylene coating during ocean transit and prevent mechanical damage from contact between adjacent pipes
- 3PE coated surface requires no additional oiling or rust prevention, as the polyethylene outer layer provides complete moisture barrier protection throughout the delivery cycle
- Container loading optimization for 6 m, 6.4 m, and 12 m lengths maximizes payload per 20ft and 40ft containers, reducing per-meter freight cost for pipeline projects
- Custom cutting to project-specific lengths available from our 5.8–12 m standard range, reducing field welding joints and installation time at the pipeline trench
- Heat number and GR.B grade identification marked on each pipe end with weather-resistant paint, ensuring traceability from factory to installation
- FOB, CIF, and DDP shipping options with professional lashing and container securing for heavy wall thickness pipes up to 36 mm
Starting Your Pipeline Pipe Procurement
Submit your project specifications including GR.B steel grade requirement, wall thickness, length, quantity, and destination port to receive a detailed quotation with unit pricing, delivery timeline, payment terms, and applicable certification documentation. We respond to all inquiries within 12 hours and can provide material samples and original Mill Test Certificates for quality confirmation before contract signing. Our team will confirm container loading plans, production scheduling, and third-party inspection arrangements to ensure your API GR.B ERW steel pipe 3PE anti-corrosion supplier delivers on time and compliant with your project specifications.
Frequently Asked Questions
Q: What is the difference between 3PE coating and single-layer FBE for pipeline anti-corrosion?
A: The 3PE coating system applies three layers — fusion-bonded epoxy primer for steel adhesion, copolymer adhesive intermediate layer, and extruded polyethylene outer layer — providing superior mechanical protection and moisture resistance compared to single-layer FBE, which offers excellent corrosion resistance but limited protection against rock damage and soil stress during backfilling.
Q: Can you provide API 5L certification and Mill Test Certificates for customs clearance in the Middle East and Southeast Asia?
A: Yes, we provide original Mill Test Certificates documenting GR.B chemical composition and mechanical properties per API 5L Grade B requirements, along with CE certification under EN 10210/10219, ISO 9001:2015 certificate, and SGS or BV third-party inspection reports accepted for customs clearance across 50+ countries.
Q: What is the MOQ for custom-length ERW pipes with 3PE coating, and what is the production lead time?
A: We accommodate custom lengths from our 5.8–12 m standard range with typical production lead times depending on order quantity and coating line scheduling. Contact us with your specific requirements for a detailed delivery timeline.
Q: How do you ensure 3PE coating adhesion quality and holiday detection before shipment?
A: Our in-house laboratory conducts adhesion pull-off testing and holiday detection at specified voltage levels on every coated pipe batch before release, with results documented in the inspection report provided with shipment documentation.
Q: Do you offer FOB, CIF, or DDP shipping with professional container loading optimization for heavy pipe cargo?
A: We provide FOB, CIF, and DDP shipping options with professional container loading plans optimized for pipe lengths and wall thicknesses, including proper lashing and securing to prevent transit damage and maximize payload per container.
Secure Your API-Certified GR.B ERW Pipe with 3PE Coating
Send your project specifications — steel grade, wall thickness, length, quantity, and destination port — to receive a detailed quotation with Mill Test Certificate confirmation and delivery timeline within 12 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxjysteel.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjysteel.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
