Stainless Steel Pipes & Tubes Supplier in India
Aashish Metal & Alloys is a major stainless steel pipes and tubes supplier and stockist in Mumbai, India and supply them to industries throughout the country and around the globe. Having supplied specialty stainless steel products since [2002], Aashish Metal & Alloys maintains one of the largest ready-stock inventories in Mumbai, our one of the largest ready stock inventories of stainless steel pipes and tubes, including austenitic, ferritic, duplex, and super duplex grades ensure that your project has no avoidable delays.
Our stainless steel pipes and tubes are ASTM A312, ASTM A213, ASTM A269, ASME SA213, ASTM A358, ASTM A789 and ASTM A790 compliant. All items ship complete with full mill test certificates, chemical composition reports and mechanical property data for traceability and confidence, giving engineers and procurement managers the data they need. Whether you need stainless instrument tubing from 1/8″ NB or large-bore pipes up to 30″ NB, Aashish Metal & Alloys has you covered with all your stainless piping needs, from schedule 5S thin-wall to XXS heavy-wall.
What Are Stainless Steel Pipes & Tubes?
Stainless steel pipes and tubes are hollow, cylindrical or shaped sections that are formed from an alloy of iron with at least 10.5% chromium by mass — per ISO 15510 / EN 10088 definition. Correct as written; confirm phrasing is intentional and not auto-generated.
which provides a passive oxide layer that prevents corrosion, pitting and crevice corrosion in difficult service conditions. Nickel increases ductility and weldability; molybdenum (usually 2-3%) makes the alloy highly resistant to chloride induced pitting, a characteristic that is unique to the 316/316L family.
They come in two different types; seamless (hot-rolled, cold-drawn) and welded (ERW, EFW, LSAW) and are specified by the material standard used. Critical fluid services are best suited to seamless pipes, which have higher pressure ratings, while welded pipes are lower-pressure and cost efficient, and are used for structural, sanitary and other applications that require dimensional consistency.
Key Differentiators of Stainless Steel vs Other Piping Materials
- Superior corrosion resistance from cryogenic service to above 600°C
- Stress corrosion cracking resistance — critical in chloride-rich and marine environments
- Hygienic, non-contaminating surface — compliant with food, pharma, and potable-water standards
- Long service life with minimal maintenance, reducing total cost of ownership
- 100% recyclable — supports sustainable and green-building initiatives
- Available Product Forms of Stainless Steel Pipes and Tubes
- Stainless Steel Grades Available for Pipes and Tubes
- Stainless Steel Pipes & Tubes Grades Supplied by Aashish Metal & Alloys
- Specifications of Stainless Steel Pipes & Tubes
- ASTM A312 Chemical Composition — Most Common Grades
- ASTM A312 Mechanical Properties
- Industry Applications of Stainless Steel Pipes & Tubes
- Quality Control & Testing
- Applicable Standards & Certifications
- Seamless vs Welded Stainless Steel Pipe — How to Choose
- Frequently Asked Questions – Stainless Steel Pipes and Tubes
Available Product Forms of Stainless Steel Pipes and Tubes
Stainless Steel Seamless Pipes
Stainless Steel Welded Pipe
Stainless Steel Seamless Tubing
Stainless Steel Grades Available for Pipes and Tubes
The stainless steel pipes and tubes come in different grades that are used in different industries and some of the most common grades are listed below.
Stainless Steel Pipes & Tubes Grades Supplied by Aashish Metal & Alloys
| Grade | UNS No. | Key Property | Common Application |
|---|---|---|---|
| SS 304 / 304L | S30400 / S30403 | General corrosion resistance | Food processing, architecture, water treatment |
| SS 304H | S30409 | High-temperature strength | Superheater headers, heat exchangers above 500°C |
| SS 309 / 309S | S30900 / S30908 | Oxidation resistance to 1000°C | Furnace parts, radiant tubes, kiln liners |
| SS 310 / 310S | S31000 / S31008 | Extreme heat resistance to 1150°C | Annealing boxes, muffles, cement kilns |
| SS 316 / 316L | S31600 / S31603 | Chloride & pitting resistance (Mo) | Marine, pharma, chemical, coastal structures |
| SS 316H | S31609 | Creep strength at elevated temps | Pressure vessels, boilers |
| SS 316Ti | S31635 | Stabilised; resists sensitisation | Welded assemblies, chemical plant |
| SS 317L | S31703 | Higher Mo; improved pitting resistance | Pulp & paper, sulphuric acid environments |
| SS 321 | S32100 | Ti-stabilised; weld decay resistant | Aircraft exhausts, jet engine parts |
| SS 347 | S34700 | Nb-stabilised, high-temp service | Petroleum refining, elevated-temp piping |
| Duplex 2205 | S32205 | High strength + corrosion resistance | Offshore, desalination, heat exchangers |
| Super Duplex 2507 | S32750 | Extreme corrosion resistance | Subsea, FGD, seawater systems |
| SS 904L | N08904 | High alloy; acid & chloride resistance | H2SO4 plants, phosphoric acid, bleach |
| Alloy 20 | N08020 | Sulphuric acid resistance | Chemical reactors, fertiliser plants |
Specifications of Stainless Steel Pipes & Tubes
| Parameter | Details |
|---|---|
| Applicable Standards | ASTM A312 / ASME SA312 | ASTM A213 / ASME SA213 | ASTM A269 | ASTM A249 | ASTM A358 / ASME SA358 | ASTM A789 / ASME SA789 | ASTM A790 / ASME SA790 | ASME SB677 |
| Size Range — Pipe | 1/8″ NB to 30″ NB (3 mm OD to 762 mm OD) |
| Size Range — Tube (OD) | 5.8 mm to 508 mm |
| Wall Thickness | 0.30 mm to 50 mm (Schedule 5S through XXS) |
| Schedules Available | 5S, 10S, 10, 20, 40S, STD, 40, 60, 80S, 80, 100, 120, 140, 160, XXS |
| Pipe / Tube Forms | Round, Square, Rectangular, Oval, Hydraulic, Custom Profile |
| Manufacturing Types | Seamless (Hot Rolled / Cold Drawn) | ERW | EFW | LSAW | Fabricated from Plate |
| End Finish | Plain End (PE) | Bevelled End (BE) | Threaded End (TE) |
| Surface Finish | 2B, BA, No.1, No.4, No.8 Mirror, Electro-polished, Pickled & Passivated |
| Length | Single Random (SRL) | Double Random (DRL) | Fixed / Cut-to-Length |
| Large Diameter Specialization | Up to 610 mm OD in EFW / LSAW; up to 30″ NB in seamless/ERW |
| Duplex / Super Duplex Standards | ASTM A789 / ASME SA789 | ASTM A790 / ASME SA790 | ASTM A928 |
| High Corrosion Alloy Standard | ASME SB677 (Alloy 904L, N08925, N08926) |
ASTM A312 Chemical Composition — Most Common Grades
| Grade | UNS | C max | Mn max | Cr | Ni | Mo |
|---|---|---|---|---|---|---|
| TP304 | S30400 | 0.08 | 2.00 | 18.0–20.0 | 8.0–11.0 | — |
| TP304L | S30403 | 0.035 | 2.00 | 18.0–20.0 | 8.0–13.0 | — |
| TP316 | S31600 | 0.08 | 2.00 | 16.0–18.0 | 11.0–14.0 | 2.00–3.00 |
| TP316L | S31603 | 0.035 | 2.00 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 |
| TP321 | S32100 | 0.08 | 2.00 | 17.0–19.0 | 9.0–12.0 | — |
| TP347 | S34700 | 0.08 | 2.00 | 17.0–19.0 | 9.0–13.0 | — |
ASTM A312 Mechanical Properties
| Grade | UNS | Tensile Strength (min) | Yield Strength (min) | Elongation (min) |
|---|---|---|---|---|
| TP304 / TP316 | S30400 / S31600 | 515 MPa [75 ksi] | 205 MPa [30 ksi] | 35% |
| TP304L / TP316L | S30403 / S31603 | 485 MPa [70 ksi] | 170 MPa [25 ksi] | 35% |
| TP321 / TP347 | S32100 / S34700 | 515 MPa [75 ksi] | 205 MPa [30 ksi] | 35% |
Industry Applications of Stainless Steel Pipes & Tubes
Stainless steel pipes and tubes from Aashish Metal & Alloys are trusted across the most demanding industrial sectors in India and globally:
| Industry / Sector | Typical Grades Used | Application Description |
|---|---|---|
| Oil & Gas / Petroleum Refining | 316L, 321, 347, Duplex 2205 | Process lines, heat exchangers, offshore headers, casing & tubing, sour service piping |
| Chemical & Petrochemical | 304L, 316L, 317L, 904L, Alloy 20 | Reactors, storage tanks, condensers, piping for acids, solvents, corrosive media |
| Power Generation | 304H, 316H, 321H, 347H | Boiler superheater tubes, steam lines, heat recovery systems |
| Pharmaceutical & Biotech | 316L (Sanitary) | CIP/SIP lines, sterile transfer, pure water distribution, clean steam |
| Food & Beverage | 304 / 316L (ASTM A270) | Milk lines, brewery piping, food processing, beverage transfer |
| Desalination & Water Treatment | Super Duplex 2507, 316L | Brine lines, RO pressure vessels, heat exchangers, evaporators |
| Marine & Offshore | 316L, Duplex 2205, Super Duplex 2507 | Deck piping, firewater mains, cooling water, ballast systems |
| Pulp, Paper & Textile | 317L, 904L, 316L | Bleach plant piping, digester lines, dye vessels, process piping |
| Construction & Architecture | 304 / 316, 316L | Structural handrails, facade cladding, curtain walls, roofing |
| Aerospace & Defence | 321, 347, 316L | Aircraft hydraulic lines, exhaust tubing, high-temp components |
| Mining & Minerals | Duplex 2205, 317L | Slurry lines, acid drainage, mineral processing equipment |
| Renewable Energy | 316L, Duplex | Solar thermal loops, biogas piping, hydrogen handling systems |
Quality Control & Testing
Quality is embedded at every step of our supply process. The following tests and inspections are performed on stainless steel pipes and tubes before dispatch:
| Test / Inspection | Method / Standard | Purpose |
|---|---|---|
| Hydrostatic Test | ASTM A312, A213 (water pressure) | Verify pressure integrity and absence of leaks |
| Pneumatic Test | On request per ASME B31.3 | For systems where residual water is unacceptable |
| Ultrasonic Testing (UT) | ASTM E213 / ASME V | Detect internal flaws, laminations, inclusions |
| Eddy Current Testing (ECT) | ASTM E309 | Surface and near-surface discontinuity detection in tubes |
| Radiographic Testing (RT) | ASTM E1032 / ASME V | Weld integrity for EFW and fabricated pipes |
| Positive Material Identification (PMI) | XRF / OES analysis | Confirm alloy grade composition on each heat |
| Dimensional Inspection | Per applicable ASTM / EN standard | OD, wall thickness, length, straightness, ovality |
| Visual & Surface Inspection | Per material standard | Check surface condition, scale, pitting, marking |
| Intergranular Corrosion Test (IGC) | ASTM A262 Practice A/B/C/E | Confirm resistance to sensitisation in weld zones |
| Hardness Testing | Brinell / Rockwell / Vickers | Verify heat treatment condition and material grade |
Applicable Standards & Certifications
| Standard | Scope |
|---|---|
| ASTM A312 / ASME SA312 | Seamless, welded & HF cold-worked austenitic SS pipe — general pressure service |
| ASTM A213 / ASME SA213 | Seamless ferritic & austenitic alloy steel boiler, superheater & heat exchanger tubes |
| ASTM A269 / ASME SA269 | Seamless & welded austenitic SS tubing — general service |
| ASTM A249 / ASME SA249 | Welded austenitic steel boiler, superheater, heat exchanger & condenser tubes |
| ASTM A358 / ASME SA358 | EFW austenitic chromium-nickel SS pipe for high-temp service |
| ASTM A789 / ASME SA789 | Seamless & welded ferritic/austenitic duplex SS tubing — general service |
| ASTM A790 / ASME SA790 | Seamless & welded ferritic/austenitic duplex SS pipe — general corrosive service |
| ASTM A270 | Seamless & welded austenitic SS sanitary tubing (food, dairy, pharmaceutical) |
| ASME SB677 | UNS N08904 (904L), N08925, N08926 SS tubes — extremely corrosive service |
| ASTM A928 | Ferritic/austenitic duplex large diameter welded pipe |
| EN 10216-5 / EN 10217-7 | European standard seamless & welded SS tubes for pressure purposes |
| DIN 11850 / ISO 1127 | Sanitary tube dimensional standards (food, pharma industries) |
Seamless vs Welded Stainless Steel Pipe — How to Choose
| Parameter | Seamless SS Pipe | Welded SS Pipe (ERW/EFW) |
|---|---|---|
| Manufacturing | Hot rolled / cold drawn billet; no weld seam | Strip/plate formed and longitudinally welded |
| Pressure Rating | Higher — preferred for critical pressure service | Lower to moderate — adequate for most services |
| Wall Uniformity | Slight eccentricity possible | Consistent wall thickness |
| Size Range | Up to ~24″ NB feasible seamlessly | Available up to 100″ NB (EFW/LSAW) |
| Surface Finish | May require pickling; bright drawn available | Bright annealed, polished available (ERW tubes) |
| Cost | Higher (more processing) | Lower (strip-based production) |
| Lead Time | Longer for non-standard sizes | Generally shorter |
| Applicable Standard | ASTM A312, A213, A269 | ASTM A312, A249, A358, A269 |
| Best Suited For | High-pressure, high-temp, cryogenic, critical service | Structural, low-pressure, sanitary, heat exchanger |
Frequently Asked Questions – Stainless Steel Pipes and Tubes
The common difference between stainless steel pipes and tubes is that Pipes are measured by inside diameter (ID) and used for fluid flow, while tubes are measured by outside diameter (OD) and used for structural or precise applications.
The A4 / 316 stainless steel offers the best corrosion resistance, especially in marine and chemical environments.
Yes, both seamless and welded stainless steel pipes are available.
The common standards include ASTM A213, A269, A249, and EN 10296-2.
Yes, stainless steel pipes can be supplied in custom lengths as per project requirements.
Yes, Material Test Certificates (MTC) and third-party inspection can be provided on request.
For More Information About Stainless Steel Pipes and Tubes please call +91-22-66362223 / 66394926 or send an email to export@aashishmetal.com
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