Description
Factory-direct P275NL1 P355N SSAW steel pipe supplier — every heat is tested in-house before shipment, with original MTC issued per EN 10204 3.1/3.2.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | P275NL1 / P275NL2 / P355N SSAW Steel Pipe |
| Product Type | Spiral Submerged Arc Welded (SSAW) Steel Pipe |
| Steel Grade | P275NL1, P275NL2, P355N |
| Standard | EN |
| Section Shape | Round |
| Length | 6 m / 6.4 m / 12 m |
| Technique | SSAW (Spiral Submerged Arc Welded) |
| Surface Treatment | Hot Rolled |
| Tolerance | ±1% |
| Oiled or Non-oiled | Non-oiled |
| Processing Service | Welding, Punching, Cutting, Bending |
| Application | Oil pipeline, Gas pipeline, Chemical fertilizer pipeline, Structural pipe |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas EPC | Onshore and offshore transmission pipelines, gathering lines, distribution networks |
| Chemical & Fertilizer | Process piping for ammonia synthesis, urea plants, acid transfer lines |
| Industrial Infrastructure | Structural pipe racks, utility corridors, plant support frameworks |
Where EN-Grade Certification Decides Whether Your Pipeline Cargo Clears Customs
Missing or inconsistent MTC documentation is the single most common reason EN-standard pipe gets held at destination ports.
When EPC contractors source P275NL1 P355N SSAW steel pipe supplier shipments for pressurized hydrocarbon service, customs authorities in the EU and Middle East routinely demand original mill test certificates matching EN 10204 3.1 or 3.2 format. A certificate that lists the wrong steel grade designation, omits impact test results at the specified sub-zero temperature, or fails to reference the correct heat number will trigger a hold — regardless of whether the physical product itself is sound. [NEED_CITE: EN 10204 inspection document types for metallic products] Beyond customs, project owners and third-party inspectors such as SGS or BV will reject material lacking full traceability from slab to finished pipe, meaning even a technically compliant shipment can be stranded on the quay if paperwork does not align.
How Normalized Fine-Grain Steel Grades Match High-Pressure Pipeline Demands
P275NL1, P275NL2, and P355N are all normalized, fine-grain pressure vessel and pipeline steels under the EN framework, engineered specifically for low-temperature impact resistance — a critical requirement for oil and gas transmission lines operating in cold climates or subsea environments. The P275NL1 P355N SSAW steel pipe supplier production process combines precision-rolled strip with spiral submerged arc welding and inline heat treatment, producing a weld seam microstructure that matches the parent metal’s toughness profile. Dimensional tolerance held at ±1% across outer diameter, wall thickness, and roundness ensures consistent fit-up during field jointing over long-distance routes, reducing the need for on-site reaming or cropping.
Engineering Compliance Across Pressure, Corrosion, and Certification Dimensions
Pipeline systems carrying hydrocarbons or corrosive chemical media must satisfy structural design codes such as EN 1993 for steel structures and ASME B31.3/B31.4/B31.8 for process and transmission piping, depending on the project jurisdiction. The normalized condition of P275NL1/P275NL2/P355N grades delivers guaranteed Charpy impact values at specified test temperatures, which is essential for preventing brittle fracture in pressurized service. For corrosion protection in aggressive environments, the hot-rolled surface can be further coated with 3PE, FBE, or epoxy systems at the fabrication stage. CE certification under EN 10210 and EN 10219 is mandatory for pipeline steel entering EU markets, and full documentation traceability by heat number is required for project handover. [NEED_CITE: EN 10210 and EN 10219 structural hollow section compliance requirements]
Understanding the Metallurgical Difference Between P275NL1, P275NL2, and P355N
The “N” suffix in all three designations indicates normalized delivery condition, meaning the steel has been heated to a uniform austenitizing temperature and air-cooled to refine the grain structure — this produces superior toughness compared to as-rolled material. The “L” denotes specified low-temperature impact testing, with NL1 and NL2 representing different test temperature tiers: P275NL1 is tested at −50 °C while P275NL2 is tested at −20 °C, meaning NL1 suits colder service environments. P355N offers a higher minimum yield strength tier within the same normalized, fine-grain family, making it suitable for higher-pressure pipeline segments where wall thickness optimization is a design priority. The SSAW manufacturing route allows production of large-diameter pipe from relatively narrow strip, offering cost advantages over seamless for transmission-line applications where extreme internal pressure is not the governing design factor. Hot-rolled surface condition provides a clean, mill-scale base suitable for subsequent field coating application.
The Hidden Cost of Accepting Substandard MTC Documentation
Procuring P275NL1 P355N SSAW steel pipe supplier material without verified, heat-level traceability creates compounding downstream risks. If the mill test certificate does not accurately reflect the actual chemical composition and mechanical properties of the delivered heat, the pipeline may fail third-party inspection at the construction stage — forcing costly material replacement, project delays, and potential contractual penalties. In the worst case, undetected non-conformance in impact toughness at low temperature can lead to brittle fracture during hydrotest or in-service operation, creating safety hazards and liability exposure. [NEED_CITE: consequences of non-conforming steel documentation in pressure pipeline projects]
Why EPC Procurement Teams Source P275NL1 P355N SSAW Steel Pipe Through Our Mill
As a factory-direct P275NL1 P355N SSAW steel pipe supplier, we eliminate intermediary markups and provide transparent pricing tied directly to raw material and production costs. Our in-house physical and chemical laboratory conducts incoming raw material inspection, in-process weld seam verification, and final dimensional and mechanical testing — every heat is tested before release, and original MTC is issued per EN 10204 3.1 or 3.2 as specified. We hold CE certification under EN 10210 and EN 10219, ISO 9001:2015 quality management registration, and accept third-party inspection by SGS or BV at any production stage. Our production lines cover over 2,800 specifications across six product categories, meaning pipeline steel can be consolidated with structural sections, plate, and fabrication services in a single procurement package. Custom non-standard diameters, wall thicknesses, and cut-to-length services are available, and our logistics team handles professional container loading optimization with real-time shipment tracking to 50+ countries.
Documentation & Compliance
- Mill Test Certificate documenting P275NL1 / P275NL2 / P355N chemical composition, yield strength, tensile strength, and Charpy impact values per EN 10204 3.1 or 3.2
- CE certificate confirming compliance with EN 10210 and EN 10219 for pressure-rated spiral welded pipe entering EU markets
- ISO 9001:2015 quality management system certificate covering the full SSAW production and inspection process
- SGS or BV third-party inspection report available for pre-shipment verification of dimensional tolerance, weld integrity, and mechanical properties
- Full material traceability by heat number linking each pipe to its original slab chemistry and normalized heat treatment record
- Export customs documentation including packing list, bill of lading, and certificate of origin for destination port clearance
Packaging, Loading & Delivery
- Non-oiled hot-rolled P275NL1/P355N SSAW pipe bundled with steel strips and edge protectors to prevent surface damage during ocean transit
- 6 m, 6.4 m, and 12 m lengths optimized for 20ft and 40ft open-top or flat-rack container loading with professional lashing plans
- Each pipe end marked with heat number, steel grade (P275NL1 / P275NL2 / P355N), and dimensional identification for site traceability
- Cut-to-length and bevel-end processing available to reduce field preparation time at pipeline construction camps
- FOB, CIF, and DDP shipping terms supported with door-to-door logistics coordination to major ports across the EU, Middle East, Southeast Asia, and Americas
How to Initiate Your P275NL1 P355N SSAW Pipeline Steel Inquiry
Submit your required steel grade, outer diameter, wall thickness, total quantity, and destination port via email or WhatsApp to receive a detailed quotation including unit price, production lead time, payment terms, and applicable certification scope. We will confirm MTC format, third-party inspection availability, and container loading optimization before contract signing.
Request Your P275NL1 P355N SSAW Steel Pipe Quotation with Full MTC Package
Send your specification sheet and destination details to receive factory-direct pricing and original mill test certificate confirmation 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
