Metinox Overseas is a reputed manufacturer, supplier, stockist, and exporter of high-quality stainless steel pipes and tubes, which are designed to serve the most demanding industries around the globe. With decades of metallurgical experience, we manufacture and supply seamless, welded, ERW and EFW stainless steel pipes and tubes in a wide range of grades to meet exacting ASTM, ASME, and ANSI standards. Each length supplied is corrosion resistant, dimensionally correct, and supported by their mill test certificates in accordance with EN 10204 3.1 so that you get complete material traceability with each order. Whether handling oil and gas pipelines, petrochemical plants, desalination facilities, food processing, pharmaceutical, or power generation applications, our pipes and tubes are capable of reliable performance under high pressure, extreme temperatures, and challenging chemical conditions. Buying with confidence is made easier by Metinox Overseas' extensive ex-stock inventory, custom sizing, third-party inspection assistance, and swift delivery to Oman, the wider GCC, Africa, and Southeast Asia. Contact us to obtain a material sample and a free quote.
Request a QuoteTable of Contents
- Our Stainless Steel Pipe & Tube Range
- Specifications of Stainless Steel Pipes & Tubes
- Stainless Steel Grades — Standard / Werkstoff / UNS
- Chemical Composition (typical %, by grade)
- Pipe Weight Chart (sample — NPS 32 / DN 800)
- Stainless Steel Tubing — Wall Thickness vs OD (sample)
- How to Choose: Seamless vs Welded vs ERW Stainless Steel Pipe
- Stainless Steel Pipe & Tube Grades Available in Oman
- Stainless Steel Pipe Dimensions & Thickness Range
- Stainless Steel Tubing Size Range in Oman
- Stainless Steel Pipes & Tubes Price List in Oman
- Industries We Serve with Stainless Steel Pipes & Tubes
- Our Manufacturing & Quality Assurance Process
- Certifications, Standards & Compliance
- FAQs - Stainless Steel Pipes & Tubes
Our Stainless Steel Pipe & Tube Range
Ref: https://www.metinoxoverseas.com/stainless-steel-pipes/
Stainless Steel Pipes
Stainless Steel Seamless Pipes
Stainless Steel Welded Pipes
Stainless Steel EFW Pipes
Stainless Steel Tubes
Special Alloys Pipes & Tubes
Alloy Steel Pipes
Alloy Steel Tubes
Carbon Steel Pipes & Tubes
ASTM A333 Gr 6 LTCS Pipes
Duplex Steel Pipes
Duplex Steel Tubes
Super Duplex Steel Pipes
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Super Duplex Steel Tubes
Specifications of Stainless Steel Pipes & Tubes
| Pipe Standards | ASTM A312 / A358 — ASME SA312 / SA358 |
| Tube Standards | ASTM A213 / A249 / A269 / A511 / A554 — ASME SA213 / SA249 / SA269 |
| Dimensional Standards | ANSI / ASME B36.19M & B36.10M |
| Pipe Outside Diameter | 6.00 mm to 914.4 mm OD (sizes up to 24" NB available ex-stock) |
| Tube Outside Diameter | 1/8" OD to 38 mm OD |
| Schedule / Thickness | SCH 5, SCH 10, SCH 40, SCH 80, SCH 80S, SCH 160, XXS |
| Type | Seamless / Welded / ERW / EFW |
| Form | Round, Square, Rectangular, Hydraulic, Coil |
| Length | Single Random, Double Random & Cut-to-Required Length |
| End Finish | Plain End, Bevelled End, Threaded |
Stainless Steel Grades — Standard / Werkstoff / UNS
| Grade | Werkstoff Nr. | UNS No. |
|---|---|---|
| SS 304 | 1.4301 | S30400 |
| SS 304L | 1.4306 / 1.4307 | S30403 |
| SS 304H | 1.4948 | S30409 |
| SS 310 | 1.4841 | S31000 |
| SS 310S | 1.4845 | S31008 |
| SS 310H | — | S31009 |
| SS 316 | 1.4401 / 1.4436 | S31600 |
| SS 316L | 1.4404 / 1.4435 | S31603 |
| SS 316H | 1.4401 | S31609 |
| SS 316Ti | 1.4571 | S31635 |
| SS 317 | 1.4449 | S31700 |
| SS 317L | 1.4438 | S31703 |
| SS 321 | 1.4541 | S32100 |
| SS 321H | 1.4878 | S32109 |
| SS 347 | 1.4550 | S34700 |
| SS 347H | 1.4961 | S34709 |
| SS 904L | 1.4539 | N08904 |
Chemical Composition (typical %, by grade)
| Grade | C max | Mn max | Si max | Cr % | Ni % | Mo % |
|---|---|---|---|---|---|---|
| 304 | 0.08 | 2.00 | 0.75 | 18.0–20.0 | 8.0–10.5 | — |
| 304L | 0.030 | 2.00 | 0.75 | 18.0–20.0 | 8.0–12.0 | — |
| 316 | 0.08 | 2.00 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| 316L | 0.030 | 2.00 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| 321 | 0.08 | 2.00 | 0.75 | 17.0–19.0 | 9.0–12.0 | — |
| 347 | 0.08 | 2.00 | 0.75 | 17.0–19.0 | 9.0–13.0 | — |
| 904L | 0.020 | 2.00 | 1.00 | 19.0–23.0 | 23.0–28.0 | 4.0–5.0 |
Values are indicative; certified composition is provided per heat in the mill test report.
Pipe Weight Chart (sample — NPS 32 / DN 800)
| NPS (DN) | Weight lb/ft (kg/m) | Schedule | OD in (mm) | Wall in (mm) |
|---|---|---|---|---|
| 32 (800) | 84.085 (126.03) | — | 32.00 (813) | 0.025 (6.035) |
| 32 (800) | 105.069 (157.02) | 10 | 32.00 (813) | 0.0312 (7.092) |
| 32 (800) | 168.037 (250.06) | 20 / XS | 32.00 (813) | 0.05 (12.07) |
| 32 (800) | 209.062 (312.01) | 30 | 32.00 (813) | 0.0625 (15.088) |
| 32 (800) | 230.029 (342.09) | 40 | 32.00 (813) | 0.0688 (17.048) |
Full weight chart (DN 6 to DN 900, all schedules) available on request or via the downloadable catalogue.
Stainless Steel Tubing — Wall Thickness vs OD (sample)
| Wall Thickness (in) | Available Tube OD Sizes |
|---|---|
| 0.010 | 1/16", 1/8", 3/16" |
| 0.028 | 1/8" to 2" |
| 0.035 | 1/8" to 2 1/4" |
| 0.065 | 1/4" to 3" |
| 0.120 | 1/2" to 3" |
How to Choose: Seamless vs Welded vs ERW Stainless Steel Pipe
| Criteria | Seamless | Welded | ERW |
|---|---|---|---|
| Manufacturing | Pierced from solid billet | Rolled & welded from plate | Cold-rolled & resistance welded |
| Pressure rating | Highest | Moderate | Moderate |
| Weak point | No weld seam | Welded seam | Welded seam |
| Best for | High-pressure / high-temp | Large-diameter lines | Economical, consistent runs |
| Relative cost | Higher | Lower | Lowest |
| Typical sizes | 1/2"–16" NB | 6"–100" NB | 1/2"–24" NB |
Stainless Steel Pipe & Tube Grades Available in Oman
| Stainless Steel Grade | UNS Number | Werkstoff No. | Key Features |
|---|---|---|---|
| 304 | S30400 | 1.4301 | General corrosion resistance |
| 304L | S30403 | 1.4306 / 1.4307 | Low-carbon welding grade |
| 304H | S30409 | 1.4948 | Elevated temperature service |
| 310 / 310S | S31000 / S31008 | 1.4841 / 1.4845 | High-temperature oxidation resistance |
| 316 | S31600 | 1.4401 / 1.4436 | Enhanced chloride resistance |
| 316L | S31603 | 1.4404 / 1.4435 | Low-carbon marine grade |
| 316Ti | S31635 | 1.4571 | Titanium-stabilized for heat applications |
| 317L | S31703 | 1.4438 | Superior pitting resistance |
| 321 / 321H | S32100 / S32109 | 1.4541 / 1.4878 | Stabilized for high-temperature service |
| 347 / 347H | S34700 / S34709 | 1.4550 / 1.4961 | Niobium-stabilized stainless steel |
| 904L | N08904 | 1.4539 | Excellent resistance to acids and chlorides |
Stainless Steel Pipe Dimensions & Thickness Range
| Parameter | Available Range |
|---|---|
| Nominal Pipe Size (NPS) | 1/8" to 48" NB |
| Outside Diameter | 10.3 mm to 1219 mm |
| Wall Thickness | 0.5 mm to 50 mm+ |
| Pipe Schedules | SCH 5S, 10S, 20, 40S, STD, 80S, XS, XXS |
| Manufacturing Types | Seamless, Welded, ERW, EFW |
| Standards | ASTM A312, A358, A213, A269, A790 |
| Length Options | Random, Double Random, Cut Length |
Stainless Steel Tubing Size Range in Oman
| Tube OD Range | Available Wall Thickness |
|---|---|
| 1/16" – 1/8" | 0.010" – 0.028" |
| 3/16" – 1/2" | 0.016" – 0.120" |
| 5/8" – 1" | 0.028" – 0.134" |
| 1-1/4" – 2" | 0.035" – 0.125" |
| 2-1/4" – 3" | 0.035" – 0.250" |
| 3-1/2" | Up to 0.375" |
Stainless Steel Pipes & Tubes Price List in Oman
| Product Type | Grade | Size Range | Price Range (USD/KG)* |
|---|---|---|---|
| Stainless Steel Seamless Pipe | SS 304/304L | 1/8" NB – 24" NB | $2.50 – $4.50 |
| Stainless Steel Welded Pipe | SS 304/304L | 1/2" NB – 48" NB | $2.00 – $4.00 |
| Stainless Steel Seamless Pipe | SS 316/316L | 1/8" NB – 24" NB | $3.50 – $6.50 |
| Stainless Steel Welded Pipe | SS 316/316L | 1/2" NB – 48" NB | $3.00 – $6.00 |
| Stainless Steel Pipe | SS 321 | 1/2" NB – 24" NB | $4.50 – $8.00 |
| Stainless Steel Pipe | SS 347/347H | 1/2" NB – 24" NB | $5.00 – $9.00 |
| Stainless Steel Pipe | SS 904L | 1/2" NB – 24" NB | $8.00 – $15.00 |
| Stainless Steel Tube | SS 304/304L | 1/2" OD – 8" OD | $2.50 – $5.00 |
| Stainless Steel Tube | SS 316/316L | 1/2" OD – 8" OD | $3.50 – $7.00 |
| Stainless Steel Instrumentation Tube | SS 316L | 1/8" OD – 1" OD | $5.00 – $10.00 |
Industries We Serve with Stainless Steel Pipes & Tubes
| Industry | Typical Use |
|---|---|
| Oil & Gas | Onshore/offshore pipelines, line pipe, process piping |
| Petrochemical & Chemical | Corrosive fluid transfer, reactors, process lines |
| Power Generation | Boiler tubes, superheater & condenser tubes |
| Desalination & Water | Seawater handling, RO plants, distribution |
| Food, Dairy & Beverage | Hygienic, polished sanitary tubing |
| Pharmaceutical | High-purity, electropolished tubing |
| Construction & Architecture | Structural, railing & decorative tube |
| Shipbuilding & Marine | Corrosion-resistant onboard piping |
| Pulp & Paper / Refining | Heat exchangers, digesters, process lines |
Our Manufacturing & Quality Assurance Process
- Raw material selection — verified billets and coils from reputed steel mills.
- Forming — seamless piercing or precision welding (ERW/EFW) to the required dimension.
- Heat treatment — solution annealing for optimal corrosion resistance and grain structure.
- Pickling & passivation — to remove scale and restore the protective chromium-oxide layer.
- Dimensional & NDT inspection — hydro testing, eddy current, ultrasonic and visual checks.
- Certification & marking — heat number, grade and standard marked; 3.1 MTC issued.
- Packing & dispatch — corrosion-protected packing with packing slips and export documents.
Certifications, Standards & Compliance
- ISO 9001:2015 Quality Management System
- EN 10204 3.1 / 3.2 Mill Test Certificates
- ASTM / ASME material standards (A312, A213, A269, A358, A554)
- ANSI / ASME B36.19M & B36.10M dimensional standards
- NACE MR0175 compliance available for sour service
- PED 2014/68/EU and third-party (SGS / BV / Lloyd's / TÜV) inspection support
FAQs - Stainless Steel Pipes & Tubes
Stainless steel pipes are generally used for transporting fluids and gases and are specified by nominal pipe size (NPS) and schedule. Stainless steel tubes are measured by exact outside diameter and wall thickness and are commonly used in structural, mechanical, and instrumentation applications.
The main types of stainless steel pipes include seamless pipes, welded pipes, ERW pipes, EFW pipes, and fabricated pipes. These are available in various grades such as 304, 316, 321, 347, and 904L for different industrial requirements.
A stainless steel pipe is a hollow cylindrical product manufactured from corrosion-resistant steel alloys containing chromium. It is widely used in oil and gas, chemical processing, water treatment, food processing, and construction industries.
The four primary categories of stainless steel are austenitic, ferritic, martensitic, and duplex stainless steel. Each type offers unique properties such as corrosion resistance, strength, heat resistance, and weldability.
SS 316 is generally considered superior to SS 304 in corrosive environments because it contains molybdenum, which improves resistance to chlorides and chemicals. SS 304 is more economical and suitable for general-purpose applications.
Steel pipes are primarily designed for fluid and gas transportation and are sized by nominal diameter. Steel tubes are manufactured to tighter dimensional tolerances and are commonly used in structural, engineering, and precision applications.
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