Seamless Steel Pipe
seamless steel pipes engineered for high-pressure fluid conveyance, gas transmission pipelines, structural mechanical engineering, and severe high-temperature industrial line operations. We guarantee absolute structural concentricity, zero internal wall scale defects, and strict wall thickness tolerances under our direct [2-Hour Rapid Quote] mill program.
Tired of slow supplier responses while your critical project bidding deadline closes in? Terrified of receiving sub-standard carbon pipes that split during field bending or fail on-site hydrostatic testing logs, risking major safety inspection failures? Eliminate cross-border purchasing risks and secure your mill-verified testing logs immediately.
PRODUCT DETAILS
Seamless Steel Pipe Three-Standard Cross Matrix
| American Standard Material (ASTM) | European Equivalent (EN 10216) | Japanese Equivalent (JIS) / GB | Schedule / Wall Thickness Range | Primary Application Matrix |
|---|---|---|---|---|
| ASTM A53 Grade B | EN 10216-1 P235TR2 | JIS G3454 STPG370 / GB 8163 | SCH 40, SCH 80 | Low-Medium Pressure Fluids, Gas & Steam Conveyance |
| ASTM A106 Grade B / C | EN 10216-2 P265GH | JIS G3456 STPT410 / GB 3087 | SCH 40 to SCH 160, XXS | High-Temperature, Extreme Pressure Refineries & Boilers |
| API 5L Grade B / X42 to X70 | EN 10208-2 L245NB to L485NB | JIS G3457 Equivalent / GB 9711 | STD, XS, Custom Heavy Wall | Cross-Country Crude Oil & Natural Gas Transmission lines |
Technical QA/QC Verification
• Total MTC Log Traceability: All pipeline consignments are systematically supplied with authentic EN 10204 3.1 Mill Test Certificates (MTC) linked to verified ladle heats, confirming tensile strength, yield limits, cold flattening resilience, and chemical boundary compliance. Ready for independent auditing by SGS, Bureau Veritas, or TÜV.
• Capital Security Guarantee: We eliminate cross-border transactional anxiety for industrial plant and pipeline infrastructure developers by processing heavy volume material configurations through 100% Irrevocable Letters of Credit (L/C) at sight financial frameworks.
Internal Protection & Ocean Logistics
• Hexagonal Sea Bundling & Anti-Crush Bracing: Small diameters are wrapped into rigid hexagonal bundles with thick steel bands, while heavy wall pipes are nested loose with internal bracing. All cargo is stowed using heavy timber dunnage and cross-lashing wire setups inside maritime vessels to eliminate friction or cross-sectional flattening across sea routes.
• Complimentary Destination Port Demurrage: SXY Steel Group allocates an automated buffer of 14 to 21 days of extended free container demurrage at your discharge port, ensuring your logistical team has sufficient operational time to process import customs clearance.
Product introduction
This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. All seamless and welded pipes shall be treated to control their micro-structure. Tensile tests, impact tests, hydro-static tests, and nondestructive electric tests shall be made in accordance to specified requirements.
1. Scope
1.1 This specification covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several grades of ferric steel are included as listed in Table 1. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties.
1.2 Supplementary Requirement S1 of an optional nature is provided. This shall apply only when specified by the purchaser.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
Technical data
Seamless Steel Pipe Chemical Composition and Mechanical Properties
This data is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
| Standard | Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Tensile Strength (MPa) | Yield Strength (MPa) |
|---|---|---|---|---|---|---|---|---|
| ASTM A53 | A | ≤0.25 | – | ≤0.95 | ≤0.05 | ≤0.06 | ≥330 | ≥205 |
| B | ≤0.30 | – | ≤1.2 | ≤0.05 | ≤0.06 | ≥415 | ≥240 | |
| ASTM A106 | A | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥415 | ≥240 |
| B | ≤0.35 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥485 | ≥275 | |
| ASTM A179 | A179 | 0.06-0.18 | – | 0.27-0.63 | ≤0.035 | ≤0.035 | ≥325 | ≥180 |
| ASTM A192 | A192 | 0.06-0.18 | ≤0.25 | 0.27-0.63 | ≤0.035 | ≤0.035 | ≥325 | ≥180 |
| API 5L PSL1 | A | 0.22 | – | 0.90 | 0.030 | 0.030 | ≥331 | ≥207 |
| B | 0.28 | – | 1.20 | 0.030 | 0.030 | ≥414 | ≥241 | |
| X42 | 0.28 | – | 1.30 | 0.030 | 0.030 | ≥414 | ≥290 | |
| X46 | 0.28 | – | 1.40 | 0.030 | 0.030 | ≥434 | ≥317 | |
| X52 | 0.28 | – | 1.40 | 0.030 | 0.030 | ≥455 | ≥359 | |
| X56 | 0.28 | – | 1.40 | 0.030 | 0.030 | ≥490 | ≥386 | |
| X60 | 0.28 | – | 1.40 | 0.030 | 0.030 | ≥517 | ≥448 | |
| X65 | 0.28 | – | 1.40 | 0.030 | 0.030 | ≥531 | ≥448 | |
| – | X70 | 0.28 | – | 1.40 | 0.030 | 0.030 | ≥565 | ≥483 |
| API 5L PSL2 | B | 0.24 | – | 1.20 | 0.025 | 0.015 | ≥414 | ≥241 |
| X42 | 0.24 | – | 1.30 | 0.025 | 0.015 | ≥414 | ≥290 | |
| X46 | 0.24 | – | 1.40 | 0.025 | 0.015 | ≥434 | ≥317 | |
| X52 | 0.24 | – | 1.40 | 0.025 | 0.015 | ≥455 | ≥359 | |
| X56 | 0.24 | – | 1.40 | 0.025 | 0.015 | ≥490 | ≥386 | |
| X60 | 0.24 | – | 1.40 | 0.025 | 0.015 | ≥517 | ≥414 | |
| X65 | 0.24 | – | 1.40 | 0.025 | 0.015 | ≥531 | ≥448 | |
| X70 | 0.24 | – | 1.40 | 0.025 | 0.015 | ≥565 | ≥483 | |
| X80 | 0.24 | – | 1.40 | 0.025 | 0.015 | ≥621 | ≥552 |
Carbon Steel Seamless Pipe Chemical Composition and Mechanical Properties
| Standard | Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Cu (%) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GB/T 8163 | 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.15 | ≤0.25 | ≤0.25 | 335-457 | ≥205 | ≥24 |
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.25 | 410-550 | ≥245 | ≥20 | |
| Q345 | 0.12-0.20 | 0.20-0.55 | 1.20-1.60 | ≤0.045 | ≤0.045 | – | – | – | 490-665 | ≥325 | ≥21 |
Carbon Steel Seamless Pipe Tolerance
| Pipe types | Dimension | Pipe Size (mm) | Tolerances |
|---|---|---|---|
| Hot rolled | OD | All | ±1% (min ±0.50mm) |
| WT | All | +15%, -12.5% | |
| Cold drawn | OD | 6~10 | ±0.20mm |
| 10~30 | ±0.40mm | ||
| 30~50 | ±0.45mm | ||
| >50 | ±1% | ||
| WT | ≤1 | ±0.15mm | |
| >1~3 | +15% -10% | ||
| >3 | +12.5% -10% |
Seamless Steel Pipe End
| Pipe End Type | Application / Description |
|---|---|
| Plain End | Wall Thickness less than 0.5 inch, including SCH STD & SCH XS |
| Plain End (Square Cut) | Wall Thickness over 0.5 inch, including SCH XXS |
| Beveled End | Wall Thickness less than 0.5 inch, including SCH STD & SCH XS |
| Couplings | Outside Diameter equal or less than 2″ |
| Thread Protection | Outside Diameter over 4 inch |
Packing and shipping
Our company has passed ISO9001 quality management system certification, Our Mill product with CE/EN10204 / ASTM/Classification society certificate/CASO/BIS etc certificate.All the customers give good appreciation to our products.We are glad to be your good partner.
Application Areas
Steel is widely used in steel structure workshops, bridge frames, main structures of high-rise buildings, and infrastructure construction (such as highways, oil and gas pipelines). Its high strength properties ensure load-bearing stability and seismic performance. In ship manufacturing, steel is used to build hull structures, decks, and internal components. Hot-rolled coils rely on their load-bearing capacity to adapt to harsh environments.
Factory workshop
With a commitment to excellence, innovation, and sustainability, the company has established itself as a trusted partner in the international steel industry.After nearly two decades of relentless endeavour, our client base now spans over 110 countries and regions across Europe, the Middle East, South America, and Southeast Asia.
Free Pipeline System Layout Audit & Seamless Pipe Nesting Optimization Assessment
Managing technical procurement parameters for a fluid transport network, industrial boiler assembly, petrochemical plant layout drawing, or global steel pipeline tender? Upload your cut-length distribution schedules, wall thickness schedules, grade tiers, or raw Bill of Materials (BOM) files below. SXY Steel Group’s specialized technical desk will conduct a comprehensive nesting yield audit to minimize drop-off scrap waste and optimize your procurement budget.
