Metinox Overseas is an international manufacturer, supplier and exporter of stainless steel pipes and tubes, ISO 9001:2015 certified, NABL-accredited lab tested, and third-party inspected by TÜV, SGS, and Bureau Veritas before shipment — with full MTC traceability from melt to US port of entry. with ASTM / ASME standards by the procurement teams from all over the United States. Our pipes operate in NACE MR0175 sour gas service, ASME BPE pharmaceutical clean rooms, and DNV-certified offshore subsea environments — documented by third-party inspection before every shipment from oil refineries in Texas or chemical processing plants in Louisiana to pharmaceuticals in New Jersey and food-grade facilities in California.
We produce and carry full range of 304, 304L, 316, 316L, 317L, 321, 347, 904L, Duplex 2205 and Super Duplex 2507 seamless pipes, welded tubes, ERW pipes, EFW pipes and instrumentation tubing. All products manufactured to the following ASTM and ASME standards: ASTM A312, ASTM A213, ASTM A269, ASTM A358 and ASME SA-312, Schedules SCH 5 through SCH XXS.
Metinox Overseas' ISO 9001:2015 certificate, full material traceability and third party inspection from TUV, SGS and Bureau Veritas assure USA buyers of quality and the assurance of quality is not expensive. We give importers, EPC contractors, MRO distributors, and plant procurement managers throughout the United States a competitive advantage with our CIF and FOB prices to major U.S. ports – Houston, Los Angeles, New York and Savannah.
Request a QuoteTable of Contents
- Types of Stainless Steel Pipes & Tubes We Supply to the USA
- Stainless Steel Pipes & Tubes Specifications
- Stainless Steel Pipe Grades Available
- Pipe & Tube Dimensions and Size Range
- Stainless Steel Pipe Schedule Chart
- Mechanical Properties of Stainless Steel Pipes & Tubes
- Chemical Composition of Key Pipe Grades
- International Standards & Grade Equivalents
- Testing & Inspection Capabilities
- Industries & Applications We Serve Across the USA
- USA Supply & Export Information
- Why USA Buyers Choose Metinox Overseas
- Frequently Asked Questions (FAQ)
Types of Stainless Steel Pipes & Tubes We Supply to the USA
Stainless Steel 304H Pipes
Stainless Steel 304L Pipes
Stainless Steel 304 Pipes
Stainless Steel 310H Pipes
Stainless Steel 310S Pipes
Stainless Steel 316H Pipes
Stainless Steel 316Ti Pipes
Stainless Steel 904L Pipes
Stainless Steel 316/316L Pipes
Stainless Steel 317/317L Pipes
Stainless Steel 321/321H Pipes
Stainless Steel 347/347H Pipes
Stainless Steel Pipes & Tubes Specifications
| Parameter | Seamless Pipe | Welded (ERW) Pipe | Instrumentation Tube | Heat Exchanger Tube |
|---|---|---|---|---|
| Manufacturing Standard | ASTM A312 / ASME SA-312 | ASTM A312 / A778 | ASTM A269 / A213 | ASTM A213 / A249 |
| OD Range | ¼" – 24" | ½" – 72" | 1/16" – 2" | ¼" – 4" |
| Wall Thickness | SCH 5S – XXS | SCH 5S – 40S | 0.020" – 0.120" | BWG 8 – BWG 22 |
| Length | Single/Double Random, Fixed | Single/Double Random | Fixed (1m–6m) | Fixed (6m–12m) |
| Surface Finish | Plain, Pickled, BA, 2B, No.4, No.8 | Plain, Pickled, 2B | BA, AP, EP, 2B | Plain, Pickled, BA |
| End Finish | Plain End, Bevel End, Threaded | Plain End, Bevel End | Plain End, Swaged | Plain End, U-Bend |
| Hydrostatic Test | Yes – per ASTM | Yes – per ASTM | Yes / Pneumatic | Yes – per ASTM |
| NDT (NDE) | UT, ET, RT, MT, PT | UT, ET, RT | ET, UT | ET, UT, HT |
Stainless Steel Pipe Grades Available
| Grade / UNS No. | Type | Key Properties | Common Applications in USA |
|---|---|---|---|
| 304 / UNS S30400 | Austenitic | Good corrosion resistance, weldable | Food processing, architectural, water systems |
| 304L / UNS S30403 | Austenitic | Low carbon, excellent weldability | Pharmaceutical, chemical tanks, piping |
| 316 / UNS S31600 | Austenitic | Mo-bearing, superior corrosion resist. | Marine, chemical, pharmaceutical piping |
| 316L / UNS S31603 | Austenitic | Low carbon variant of 316 | Offshore, pulp & paper, nuclear |
| 317L / UNS S31703 | Austenitic | Higher Mo/Cr, better acid resistance | Sulfuric acid, flue-gas desulfurization |
| 321 / UNS S32100 | Austenitic (Ti-stabilized) | High-temp resistance up to 900°F | Exhaust systems, aerospace, power plants |
| 347 / UNS S34700 | Austenitic (Nb-stabilized) | Sensitization-resistant | Boilers, high-temp chemical service |
| 904L / UNS N08904 | Super Austenitic | Very high corrosion resistance | Acid handling, seawater desalination |
| Duplex 2205 / UNS S31803 | Duplex | High strength + SCC resistance | Offshore, pulp & paper, heat exchangers |
| Super Duplex 2507 / UNS S32750 | Super Duplex | Exceptional corrosion + strength | Subsea, deep-sea oil, chloride environ. |
| Zeron 100 / UNS S32760 | Super Duplex | High PREN (>40), superior offshore | FPSOs, subsea manifolds, gas processing |
| Inconel 625 / UNS N06625 | Nickel Alloy | Cryogenic to 2000°F service | Aerospace, nuclear, seawater piping |
Pipe & Tube Dimensions and Size Range
| Nominal Pipe Size (NPS) | OD (inches) | OD (mm) | Wall Thickness Range (inches) | Available Schedules |
|---|---|---|---|---|
| 1/8" | 0.405" | 10.29 mm | 0.049" – 0.095" | SCH 10, 40, 80 |
| 1/4" | 0.540" | 13.72 mm | 0.065" – 0.119" | SCH 10, 40, 80 |
| 1/2" | 0.840" | 21.34 mm | 0.065" – 0.294" | SCH 5S – 160, XXS |
| 3/4" | 1.050" | 26.67 mm | 0.083" – 0.308" | SCH 5S – 160, XXS |
| 1" | 1.315" | 33.40 mm | 0.109" – 0.358" | SCH 5S – 160, XXS |
| 1½" | 1.900" | 48.26 mm | 0.109" – 0.400" | SCH 5S – 160, XXS |
| 2" | 2.375" | 60.33 mm | 0.109" – 0.436" | SCH 5S – 160, XXS |
| 3" | 3.500" | 88.90 mm | 0.120" – 0.600" | SCH 5S – 160, XXS |
| 4" | 4.500" | 114.30 mm | 0.120" – 0.674" | SCH 5S – 160, XXS |
| 6" | 6.625" | 168.28 mm | 0.134" – 0.864" | SCH 5S – 160, XXS |
| 8" | 8.625" | 219.08 mm | 0.148" – 0.906" | SCH 5S – 160, XXS |
| 10" | 10.750" | 273.05 mm | 0.165" – 1.000" | SCH 5S – 160 |
| 12" | 12.750" | 323.85 mm | 0.180" – 1.000" | SCH 5S – 160 |
| 16" | 16.000" | 406.40 mm | 0.188" – 1.218" | SCH 10 – 80 |
| 24" | 24.000" | 609.60 mm | 0.218" – 1.218" | SCH 10 – 60 |
Stainless Steel Pipe Schedule Chart — Wall Thickness (inches)
| NPS | SCH 5S | SCH 10S | SCH 40S (STD) | SCH 80S (XS) | SCH 160 | XXS |
|---|---|---|---|---|---|---|
| ½" | 0.065 | 0.083 | 0.109 | 0.147 | 0.187 | 0.294 |
| ¾" | 0.065 | 0.083 | 0.113 | 0.154 | 0.219 | 0.308 |
| 1" | 0.065 | 0.109 | 0.133 | 0.179 | 0.250 | 0.358 |
| 1½" | 0.065 | 0.109 | 0.145 | 0.200 | 0.281 | 0.400 |
| 2" | 0.065 | 0.109 | 0.154 | 0.218 | 0.344 | 0.436 |
| 3" | 0.083 | 0.120 | 0.216 | 0.300 | 0.438 | 0.600 |
| 4" | 0.083 | 0.120 | 0.237 | 0.337 | 0.531 | 0.674 |
| 6" | 0.109 | 0.134 | 0.280 | 0.432 | 0.719 | 0.864 |
| 8" | 0.109 | 0.148 | 0.322 | 0.500 | 0.906 | 0.875 |
| 10" | 0.134 | 0.165 | 0.365 | 0.500 | 1.000 | — |
| 12" | 0.156 | 0.180 | 0.375 | 0.562 | 1.000 | — |
Mechanical Properties of Stainless Steel Pipes & Tubes
| Grade | Tensile Strength (PSI / MPa) | Yield Strength (PSI / MPa) | Elongation (%) | Hardness (HRB max) |
|---|---|---|---|---|
| 304 / 304L | ≥75,000 PSI / ≥515 MPa | ≥30,000 PSI / ≥205 MPa | ≥35% | 92 HRB |
| 316 / 316L | ≥75,000 PSI / ≥515 MPa | ≥30,000 PSI / ≥205 MPa | ≥35% | 95 HRB |
| 317L | ≥75,000 PSI / ≥515 MPa | ≥30,000 PSI / ≥205 MPa | ≥35% | 95 HRB |
| 321 | ≥75,000 PSI / ≥515 MPa | ≥30,000 PSI / ≥205 MPa | ≥35% | 95 HRB |
| 347 | ≥75,000 PSI / ≥515 MPa | ≥30,000 PSI / ≥205 MPa | ≥35% | 95 HRB |
| 904L | ≥71,000 PSI / ≥490 MPa | ≥31,000 PSI / ≥215 MPa | ≥35% | 90 HRB |
| Duplex 2205 | ≥90,000 PSI / ≥620 MPa | ≥65,000 PSI / ≥450 MPa | ≥25% | 31 HRC |
| S. Duplex 2507 | ≥116,000 PSI / ≥800 MPa | ≥80,000 PSI / ≥550 MPa | ≥15% | 32 HRC |
| Inconel 625 | ≥120,000 PSI / ≥827 MPa | ≥60,000 PSI / ≥414 MPa | ≥30% | — |
Chemical Composition of Key Pipe Grades (% Weight)
| Grade | C (max) | Cr | Ni | Mo | Mn (max) | Si (max) | N (max) | Others |
|---|---|---|---|---|---|---|---|---|
| 304 | 0.08 | 18.0–20.0 | 8.0–10.5 | — | 2.00 | 0.75 | 0.10 | — |
| 304L | 0.030 | 18.0–20.0 | 8.0–12.0 | — | 2.00 | 0.75 | 0.10 | — |
| 316 | 0.08 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 2.00 | 0.75 | 0.10 | — |
| 316L | 0.030 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 2.00 | 0.75 | 0.10 | — |
| 317L | 0.030 | 18.0–20.0 | 11.0–15.0 | 3.00–4.00 | 2.00 | 0.75 | 0.10 | — |
| 321 | 0.08 | 17.0–19.0 | 9.0–12.0 | — | 2.00 | 0.75 | 0.10 | Ti: 5×C min |
| 347 | 0.08 | 17.0–19.0 | 9.0–13.0 | — | 2.00 | 0.75 | — | Nb: 10×C min |
| 904L | 0.020 | 19.0–23.0 | 23.0–28.0 | 4.00–5.00 | 2.00 | 1.00 | — | Cu: 1.0–2.0% |
| Duplex 2205 | 0.030 | 22.0–23.0 | 4.5–6.5 | 3.00–3.50 | 2.00 | 1.00 | 0.14–0.20 | — |
| S. Duplex 2507 | 0.030 | 24.0–26.0 | 6.0–8.0 | 3.00–5.00 | 1.20 | 0.80 | 0.24–0.32 | Cu: 0.5% |
International Standards & Grade Equivalents
| ASTM / ASME (USA) | EN / DIN (Europe) | JIS (Japan) | BS (UK) | UNS No. | Product Form |
|---|---|---|---|---|---|
| ASTM A312 TP304 | EN 1.4301 / DIN X5CrNi18-10 | SUS304 | BS 304S31 | S30400 | Seamless / Welded Pipe |
| ASTM A312 TP304L | EN 1.4307 / DIN X2CrNi18-9 | SUS304L | BS 304S11 | S30403 | Seamless / Welded Pipe |
| ASTM A312 TP316 | EN 1.4401 / DIN X5CrNiMo17-12-2 | SUS316 | BS 316S31 | S31600 | Seamless / Welded Pipe |
| ASTM A312 TP316L | EN 1.4404 / DIN X2CrNiMo17-12-2 | SUS316L | BS 316S11 | S31603 | Seamless / Welded Pipe |
| ASTM A790 S31803 | EN 1.4462 | SUS329J3L | — | S31803 | Duplex Pipe |
| ASTM A790 S32750 | EN 1.4410 | — | — | S32750 | Super Duplex Pipe |
| ASTM A213 TP316L | EN 1.4404 | SUS316LTB | — | S31603 | Heat Exchanger Tube |
| ASTM A269 TP316L | EN 1.4404 | — | — | S31603 | Instrumentation Tube |
| ASTM B444 N06625 | EN 2.4856 | NCF625 | NA21 | N06625 | Inconel 625 Pipe |
Testing & Inspection Capabilities
| Test / Inspection | Standard / Method | Scope | Certificate Issued |
|---|---|---|---|
| Chemical Analysis | ASTM A751 / OES / XRF | All heat / lot | Mill Test Certificate (MTC) |
| Mechanical Testing | ASTM A370 | Tensile, yield, elongation | Mechanical Test Report |
| Hydrostatic Test | ASTM A312 / ASME B31.3 | All pipes per schedule | Hydro Test Certificate |
| Ultrasonic Testing (UT) | ASTM E213 / ASME SE-213 | Seamless pipes, thick-wall | UT Report |
| Eddy Current Testing (ET) | ASTM E309 / ASME SE-309 | Tubes, instrumentation | ET Report |
| Radiographic Testing (RT) | ASTM E1032 | Welds on EFW / ASTM A358 | RT Film + Report |
| Magnetic Particle Testing (MT) | ASTM E709 | Ferromagnetic materials | MT Report |
| Dye Penetrant Testing (PT) | ASTM E165 | Weld areas, fittings | PT Report |
| Intergranular Corrosion Test | ASTM A262 Practice A/B/C/E | 304L, 316L, 321, 347 | IGC Test Certificate |
| PMI (Positive Material ID) | XRF / OES | On request / per spec | PMI Report |
| Hardness Test | ASTM E18 / E92 | Brinell, Rockwell, Vickers | Hardness Certificate |
| Pitting Resistance Test (PREN) | ASTM G48 Method A/B | Duplex / Super Duplex | Corrosion Test Report |
| Third-Party Inspection | TÜV / SGS / Bureau Veritas | On customer request | TPI Report + Release Note |
Industries & Applications We Serve Across the USA
Oil & Gas — Upstream, Midstream & Downstream
Metinox stainless pipes and tubes are used in wellhead assemblies, OCTG applications, manifolds, pipeline transmission, and refinery process piping. Grades including API 5L, ASTM A106, Duplex 2205, and Inconel 625 are regularly supplied to operators and EPC firms in Texas, Oklahoma, and the Gulf of Mexico offshore sector.
Products: Seamless pipes, SMLS line pipe, duplex pipes
Standards: API 5L, ASTM A312, ASTM A790, NACE MR0175/ISO 15156
Petrochemical & Chemical Processing
Process pipelines, heat exchanger tube bundles, reactor inlet/outlet nozzles, and vessel nozzles require high-corrosion-resistance alloys. Metinox supplies 316L, 317L, 904L, Inconel, and Hastelloy variants to facilities in Louisiana, Texas, and the Gulf Coast chemical corridor.
Products: Seamless pipes, heat exchanger tubes, instrumentation tubing
Standards: ASTM A312, ASTM A213, ASTM A249, ASME Section VIII
Power Generation
Boiler tubes, superheater tubes, economizer tubes, and condenser tubes in thermal, nuclear, and combined-cycle power plants require precise dimensional tolerances and heat-resistance. Grades 321, 347, 310S, and 316L are standard.
Products: Boiler tubes (ASTM A213), superheater tubes, economizer tubes
Standards: ASTM A213, ASME SA-213, ASME Section I
Food, Beverage & Pharmaceutical
Sanitary-grade stainless steel piping in 316L and 304L is used for hygienic fluid transport in breweries, dairy, juice plants, and pharmaceutical manufacturing. Surface finish requirements range from 2B to electropolished (EP) per ASME BPE.
Products: Sanitary tubing, instrumentation tubing, seamless hygienic pipes
Standards: ASTM A270, ASME BPE, 3-A Sanitary Standard
Water Treatment & Desalination
Stainless steel piping in 316L, 904L, Duplex 2205, and Super Duplex 2507 is used in municipal water treatment, industrial wastewater, and desalination facilities across the US Sun Belt states and coastal regions.
Products: Large-diameter pipes, seamless tubes, welded pipes
Standards: ASTM A312, ASTM A790, AWWA C200
Aerospace & Defense
Precision stainless and nickel alloy tubing for hydraulic lines, fuel systems, and structural applications in aerospace manufacturing. 316L, 321, 347, and Inconel 625 in precision-drawn instrumentation tube form — compliant with AMS 5567, AMS 5570, and ASTM A269 — available from stock for aerospace and defense procurement teams.
Products: Instrumentation tubing, precision drawn tubing
Standards: ASTM A269, AMS specifications on request
Marine & Offshore
Offshore platforms, FPSOs, subsea pipelines, and marine heat exchangers demand materials with exceptional resistance to seawater corrosion. Duplex 2205, Super Duplex 2507, 316L, and 904L are key offerings.
Products: Duplex/Super Duplex pipes, seamless tubes, EFW pipes
Standards: ASTM A790, DNV-ST-F101, ISO 15156
USA Supply & Export Information — Metinox Overseas
Export Capabilities to the United States
Metinox Overseas is an established exporter of stainless steel pipes and tubes to the United States, with a dedicated USA sales desk and established logistics partnerships with freight forwarders serving all major US seaports.
| Export Parameter | Details |
|---|---|
| Incoterms Available | FOB Mumbai / Nhava Sheva, CIF Houston / Los Angeles / New York / Savannah, CFR, DAP |
| Port of Loading | Nhava Sheva (JNPT), Mumbai Port, Mundra Port, Chennai Port |
| Destination Ports (USA) | Houston (TX), Los Angeles (CA), Newark/New York (NJ/NY), Savannah (GA), Baltimore (MD), Seattle (WA) |
| Typical Lead Time | 15–45 days (ready stock: 7–15 days) depending on volume, grade, and port congestion |
| Payment Terms | T/T (Wire Transfer), LC at Sight, LC 90 Days — flexible for established buyers |
| Minimum Order Quantity | 1 MT (ready stock); 5 MT (mill order) — custom quantities considered |
| Documentation Provided | Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, Mill Test Certificate, NABL Lab Reports, Third-Party Inspection Reports, Form E (for eligible duty reduction) |
| Customs HS Code (USA) | 7304.41 (Seamless SS Pipe), 7306.40 (Welded SS Pipe), 7304.49 (Other Seamless SS Tube) |
| US Import Duties | Applicable Section 232 tariff rates — buyers advised to verify current USTR/CBP status |
| Quality Compliance | ISO 9001:2015 | PED 97/23/EC | NABL Approved Lab | ASTM / ASME / API certified product |
| Dual-Use & Export Control | Products exported in compliance with US BIS Export Administration Regulations (EAR) |
| Carbon Border Consideration | LCA / EPD documentation available on request for sustainable procurement compliance |
Why USA Buyers Choose Metinox Overseas
- Competitive CIF/FOB pricing — 20–35% lower than domestic US mill pricing for equivalent ASTM-grade products
- Large ready stock held in India warehouse — minimizes lead times vs. mill-direct orders
- Full MTC traceability from melt to final product — compatible with ASME / API QA requirements
- Third-party inspection by TÜV, SGS, or Bureau Veritas before shipment — reduces buyer-side risk
- ISO 9001:2015 & PED-compliant quality management system
- Dedicated USA account management team with technical support for RFQ and specification review
- Custom marking, colour coding, and pipe end protection available per buyer’s specification
Frequently Asked Questions (FAQ)
Seamless pipes are manufactured without a weld seam, making them suitable for high-pressure and critical applications. Welded pipes are made from rolled steel strips and are more economical, especially for larger diameters and general-purpose use.
SS 316L is the most commonly used grade for chemical processing due to its excellent corrosion resistance. For highly aggressive environments, grades such as 317L, 904L, Duplex 2205, or Super Duplex 2507 may be recommended.
Common ASTM standards include ASTM A312, ASTM A213, ASTM A269, ASTM A249, ASTM A358, ASTM A778, ASTM A790, and ASTM A409. These standards cover stainless steel pipes and tubes for industrial, heat exchanger, and structural applications.
Metinox Overseas supplies stainless steel pipes in SCH 5S, 10S, 40S, 80S, 160, and XXS schedules as per ASME B36.19M. Custom wall thicknesses are also available on request.
Simply provide the pipe size, grade, type, schedule, quantity, and delivery requirements. Our team will review your RFQ and provide a competitive quotation within 24 business hours.
Ready-stock items are typically dispatched within 7–15 days, while custom orders may require 30–60 days for production. Delivery times vary depending on shipping schedules and destination ports.
Ready to Order Stainless Steel Pipes & Tubes?
Metinox Overseas supplies certified stainless steel pipes and tubes for demanding industrial, offshore, and process applications across the USA. Contact us today for pricing, availability, and a customized quotation.
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