Home > Seamless Tube > Stainless Steel Seamless Tubes
Inox Steel India supplies high-precision Stainless Steel Seamless Tubes engineered to meet the demanding requirements of heat exchangers, boilers, condensers, instrumentation lines, hydraulic circuits, petrochemical operations, and pharmaceutical processing systems. Manufactured as per ASTM A213, ASTM A269, and ASTM A632, these tubes ensure exceptional performance in high-pressure, high-temperature, and corrosive environments.
Seamless tubes are the industry standard for critical applications because they offer:
We supply all major austenitic stainless-steel grades:
These seamless tubes are produced through cold drawing, pilgering, hot finishing, and solution annealing, ensuring high metallurgical integrity and long service life. Industries rely on our tubes for complex process requirements such as:
Inox Steel India is known for delivering consistent, certified, export-quality seamless tubes to EPC contractors, OEMs, fabricators, and end-users across India, GCC, Africa, Europe, and Southeast Asia. Every batch adheres to international quality standards with complete MTC documentation.
Stainless steel seamless tubes are widely chosen for high-pressure, high-temperature, high-purity, and corrosive-service environments. The absence of weld seams ensures leak-free performance and uniform mechanical integrity, making these tubes essential across process industries.
1. Heat Exchanger & Condenser Tubes
Seamless tubes deliver excellent thermal conductivity and uniform wall thickness, ensuring reliable heat transfer.
Used In:
Preferred Grades: TP304L / TP316L / TP321
2. Boiler, Superheater & High-Temperature Systems
High-temperature resistance and creep strength make seamless tubes suitable for critical boiler operations.
Applications:
Standards: ASTM A213 (TP304H/316H/321/347)
3. Instrumentation & Control Tubing
Precision OD/ID tolerances ensure accurate flow control in instrumentation circuits.
Used For:
Standard: ASTM A269 / ASTM A632 (small diameter)
4. Chemical & Petrochemical Process Tubing
Excellent resistance to acids, chlorides, solvents, and marine environments.
Applications:
Preferred: TP316L & TP347
5. Food, Beverage & Pharmaceutical Tubing
Suitable for hygienic and high-purity operations.
Applications:
Finish Options: BA (Bright Annealed) • EP (Electropolished)
6. Mechanical & Automotive Tubing
Used for structural, mechanical, and performance-driven components.
Applications:
(Grades: TP304/L, TP316/L, TP321, TP347 — ASTM A213 / A269 / A632)
| Parameter | Stainless Steel Seamless Tubes |
|---|---|
| Applicable Standards | ASTM A213 / ASME SA213 • ASTM A269 • ASTM A632 • EN 10216-5 • ISO / DIN Precision Tube Standards |
| Grades Available | TP304, TP304L, TP316, TP316L, TP321, TP347 |
| Manufacturing Process | Cold Drawn Seamless (CDS) • Hot Finished Seamless • Pilgering • Extrusion • Solution Annealed |
| Size Range (OD) | 6 mm to 219 mm OD (Custom OD available) |
| Thickness Range | 0.5 mm to 12.7 mm |
| Length | 6m • 12m • Cut-to-Length • U-Bent Tubes • Coil Tubes (ASTM A632) |
| Surface Finish Options | Mill Finish • Annealed & Pickled • Bright Annealed (BA) • Electropolished (EP) • Clean ID for instrumentation |
| Mechanical Properties | Tensile Strength: 515–620 MPa • Yield Strength: 200–290 MPa • Elongation: 35–45% (grade-wise) |
| Corrosion Resistance | Excellent resistance to chemicals, chlorides, pitting, stress corrosion cracking & high-temperature oxidation |
| Heat Treatment | Solution Annealed • Stress Relieved • Stabilized Heat Treatment (TP321/TP347) |
| Dimensional Tolerances | As per ASTM A269/A213 — Tight OD, WT, roundness & straightness tolerances |
| End Finish | Plain End (PE) • Bevel End (BE) • Deburred Ends |
| Testing (Mandatory) | Eddy Current • Hydrostatic Test • Mechanical Tests • Flattening • Flaring • Hardness Test |
| Optional Testing | PMI • Ultrasonic Testing • Intergranular Corrosion Test (IGC) • Residual Stress Testing |
| NDT Compliance | ASTM A269/A213 mandatory NDT — EC/UT/Hydro |
| Documentation Provided | MTC EN 10204 3.1 • NDT Reports • PMI Reports • Heat Treatment Charts |
| Typical Applications | Heat Exchangers • Boilers • Superheaters • Condensers • Instrumentation • Chemical Processing • Food & Pharma • Hydraulic Tubes |
| Key Grade Benefits | TP304/L: General service • TP316/L: Chloride & pitting resistance • TP321: High-temp stabilization • TP347: High-stress elevated temp performance |
| Application | Recommended Grade | Why |
|---|---|---|
| General service, heat exchangers | TP304/304L | Economical corrosion resistance |
| Chemical & marine environments | TP316/316L | Superior pitting & chloride resistance |
| High-temperature service | TP321 | Titanium stabilized |
| High-stress, elevated temperature | TP347 | Niobium stabilized |
| Instrumentation & hydraulic lines | TP316L & BA/EP finishes | Smooth ID, precision tolerance |
| Type | OD Range | WT Range | Typical Use |
|---|---|---|---|
| Seamless Tube (Standard) | 6 mm – 219 mm | 0.5 mm – 12.7 mm | HX, boilers, condensers |
| Instrumentation Tube | 3.2 mm – 25.4 mm | 0.5 mm – 2.11 mm | Control & hydraulic lines |
| Coiled Tubes (A632) | 6 mm – 19.05 mm | 0.5 mm – 1.65 mm | Injection & continuous tubing |
| U-Bent Tubes | Custom | Custom | Heat exchanger bundles |
| Grade | Price Range (₹/kg) | Notes |
|---|---|---|
| TP304/304L | ₹320 – ₹420 | Most commonly used |
| TP316/316L | ₹380 – ₹480 | Superior corrosion resistance |
| TP321 | ₹400 – ₹520 | High-temp applications |
| TP347 | ₹420 – ₹550 | Premium high-temperature grade |
| BA / EP Tubes | Add 15–30% | Pharma/Food-grade finish |
Prices vary by OD, WT, finish, and project volume.
Every stainless-steel seamless tube batch undergoes:
Mandatory Mechanical Tests
Dimensional Tests
Non-Destructive Tests (NDT)
Special Application Tests
All tubes are supplied with:
MTC 3.1 • NDT Reports • Heat Number Traceability • PMI Reports (when required)
Inox Steel India is a trusted supplier of Stainless Steel Seamless Tubes for critical applications across global industries. Our tubes are manufactured with high precision, strict dimensional control, and superior metallurgical consistency, ensuring long-term performance in demanding process environments.
What Makes Our Seamless Tubes Superior
We support complex engineering requirements with consistent tube quality across every production batch.
| Industry | Applications |
|---|---|
| Petrochemical & Refinery | Heat exchangers, condensers, reboilers |
| Power & Energy | Boiler tubes, superheater coils, air heaters |
| Chemical Processing | Corrosive fluid lines, reactor coils |
| Pharmaceutical & Food | High-purity BA/EP tubes |
| Oil & Gas | Injection lines, instrumentation circuits |
| HVAC & Refrigeration | Evaporator & condenser coils |
| Automotive & Mechanical | Precision tubing, exhaust components |
| OEM Manufacturing | Process equipment, hydraulic tubes |
We are a long-term partner to EPC contractors, OEMs, and process equipment fabricators worldwide.
Inox Steel India exports stainless steel seamless tubes to 40+ countries, ensuring safe transportation and strict compliance with technical documentation.
Export Packaging Includes:
Major Export Markets:
UAE • Saudi Arabia • Qatar • Kuwait • Oman
Europe • Singapore • Malaysia • Vietnam
South Africa • Nigeria • Kenya • Egypt
USA (project-based compliance)
We provide:
✔ Material selection guidance
✔ Heat exchanger & boiler tube recommendations
✔ Documentation for third-party inspection
✔ Project-specific pricing
✔ Swift dispatch for small & bulk orders
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
Yes — A53 Grade B is widely used for air lines in industries.
IS 3589 Class B with red oxide paint OR 3LPE coating.
Yes — up to 2540 mm OD in IS 3589 (SAW).
Yes — Hot Dip Galvanized A53 pipes are commonly used.
Yes — with certified coating tests.
Yes — full documentation + test certificates + coated pipes.
Inox Steel India supplies stainless steel seamless tubes in grades TP304/L, TP316/L, TP321 & TP347 as per ASTM A213, A269 & A632. Ideal for heat exchangers, boilers, condensers, instrumentation and high-purity applications. BA & EP finishes available.