Seamless & Welded Stainless Steel Tubing
Precision-manufactured austenitic stainless steel tubing engineered for demanding service in heat exchange, chemical processing, and critical pressure systems.
1/8" – 12"
OD Range
0.028" – 0.400"
Wall Thickness
304 / 316 / 316L
Available Grades
Engineered for Critical Service Conditions
ASTM A269 covers seamless and welded austenitic stainless steel tubing for general corrosive service and high- or low-temperature applications. Specify the grade, dimensions, length, manufacturing route, heat treatment, surface condition, testing, quantity, and documentation required for the project. For welded boiler and heat-exchanger service, compare ASTM A249 tubing, review the heat exchanger tubing range, or send your technical requirements.
Seamless & Welded Options
Both manufacturing methods available, selected based on application requirements, pressure ratings, and cost optimization.
Tight Dimensional Tolerances
Outside diameter tolerance of ±0.005" for sizes under 1.5" OD. Wall thickness held to ±10% of nominal.
Full Traceability
Heat-level traceability from raw material through final shipment. EN 10204 3.1 certificates provided with every order.
Material Specifications & Chemical Composition
| DN | Tube OD | Wall Thickness | OD Tolerance | WT Tolerance | Length Tolerance | Weight |
|---|---|---|---|---|---|---|
| inch(mm) | inch(mm) | inch(mm) | inch(mm) | (kg/m) | ||
| 8 | 1/4" (6.35) | 0.035" (0.89) | +/-0.005" (0.13) | +/-10.0% | +1/8" (3.18) -0 | 0.124 |
| 15 | 1/2" (12.7) | 0.065" (1.65) / 0.049"(1.25) | +/-0.005" (0.13) | +/-10.0% | +1/8" (3.18) -0 | 0.454 |
| 20 | 3/4" (19.1) | 0.065" (1.65) / 0.049"(1.25) | +/-0.005" (0.13) | +/-10.0% | +1/8" (3.18) -0 | 0.717 |
| 25 | 1" (25.4) | 0.065" (1.65) / 0.049"(1.25) | +/-0.005" (0.13) | +/-10.0% | +1/8" (3.18) -0 | 0.976 |
| 40 | 1-1/2" (38.1) | 0.065" (1.65) / 0.049"(1.25) | +/-0.008" (0.20) | +/-10.0% | +1/8" (3.18) -0 | 1.50 |
| 50 | 2" (50.8) | 0.065" (1.65) / 0.049"(1.25) | +/-0.008" (0.20) | +/-10.0% | +1/8" (3.18) -0 | 2.02 |
| 65 | 2-1/2" (63.5) | 0.065" (1.65) | +/-0.010" (0.25) | +/-10.0% | +1/8" (3.18) -0 | 2.54 |
| 80 | 3" (76.2) | 0.065" (1.65) | +/-0.010" (0.25) | +/-10.0% | +1/8" (3.18) -0 | 3.06 |
| 100 | 4" (101.6) | 0.083" (2.11) | +/-0.015" (0.38) | +/-10.0% | +1/8" (3.18) -0 | 5.23 |
| 150 | 6" (152.4) | 0.109" (2.77) | +/-0.030" (0.76) | +/-10.0% | +1/8" (3.18) -0 | 10.32 |
| 200 | 8" (203.2) | 0.109" (2.77) | +/-0.030" (0.76) | +/-10.0% | +1/8" (3.18) -0 | 13.86 |
| 250 | 10"(254) | 0.120"(3.05) | +/-0.040" (1.016) | +/-10.0% | +1/8" (3.18) -0 | - |
| 300 | 12"(304.8) | 0.120"(3.05) | +/-0.040" (1.016) | +/-10.0% | +1/8" (3.18) -0 | - |
ASTM A269 defines chemical composition, mechanical properties, heat treatment, dimensions, and testing requirements for the applicable tubing grades. The purchase specification should identify the required edition and any supplementary requirements.
- 304
- 304L
- 316
- 316L
- 317L
- 321
- S30400
- S30403
- S31600
- S31603
- S31703
- S32100
- 0.08%
- 0.03%
- 0.08%
- 0.03%
- 0.03%
- 0.08%
- 2.00%
- 2.00%
- 2.00%
- 2.00%
- 2.00%
- 2.00%
- 18.0–20.0
- 18.0–20.0
- 16.0–18.0
- 16.0–18.0
- 18.0–20.0
- 17.0–19.0
- 8.0–11.0
- 8.0–12.0
- 10.0–14.0
- 10.0–14.0
- 11.0–15.0
- 9.0–12.0
- —
- —
- 2.0–3.0
- 2.0–3.0
- 3.0–4.0
- —
- 75 ksi
- 70 ksi
- 75 ksi
- 70 ksi
- 75 ksi
- 75 ksi
- 30 ksi
- 25 ksi
- 30 ksi
- 25 ksi
- 30 ksi
- 30 ksi
Confirm the required grade, ASTM edition, dimensions, heat treatment, surface condition, testing, and material documentation when requesting a quotation. Availability of grades outside the listed range should be confirmed for each order.
Built for the World's Most Demanding Environments
ASTM A269 tubing serves as the backbone of critical infrastructure across energy, chemical, pharmaceutical, and food processing industries worldwide.
Chemical Processing
Corrosion-resistant tubing for reactors, heat exchangers, and process piping handling aggressive media including acids, alkalis, and chlorides.
Oil & Gas
High-pressure instrumentation lines, sample points, and process tubing for upstream, midstream, and downstream operations in hostile environments.
Pharmaceutical & Biotech
Electropolished and passivated tubing for WFI systems, CIP/SIP loops, and process lines requiring sanitary finishes and zero contamination risk.
Power Generation
Condenser and heat exchanger tubing for fossil fuel, nuclear, and renewable energy plants. Resistant to high-temperature oxidation and thermal cycling.
Food & Beverage
Stainless steel tubing for dairy, brewing and other food-processing applications. Specify the required grade, surface finish and cleaning procedure; verify food-contact suitability for the intended service.
Marine & Offshore
Superior pitting and crevice corrosion resistance for saltwater environments. Used in ballast systems, fire mains, and instrument air lines.
Every Tube Verified. Every Shipment Certified.
The inspection plan should be agreed before production and should identify the required dimensional checks, mechanical tests, nondestructive examination, surface inspection, and material documentation.
Testing and documentation requirements vary by grade, manufacturing route, project specification, and the applicable ASTM A269 edition. Include any customer-specific inspection or witness requirements in the enquiry.
ISO 9001:2015 Certified
Quality management system registered by accredited third-party auditor
PED 2014/68/EU Compliant
European Pressure Equipment Directive for export to EU member states
AD 2000-Merkblatt W0
German pressure vessel standard for high-integrity applications
Non-Destructive Examination
Eddy current, hydrostatic, and pneumatic testing per A450/A450M
From Raw Material to Delivered Excellence
A controlled, documented production flow ensures consistent quality from melt to shipment.
Raw Material Verification
PMI testing on incoming billets and strip. Chemical composition verified against heat certificate.
Forming & Welding
Cold pilgering or continuous TIG welding with in-process dimensional checks at every stand.
Heat Treatment & Testing
Solution annealing per grade requirements. Eddy current, hydrostatic, and flaring tests completed.
Finishing & Shipping
Pickling, passivation, cutting to length, protective packaging, and MTC preparation for dispatch.