ASTM A213 / A249
stainless steel
heat exchanger tube
TeCarve supplies ASTM A213 seamless and ASTM A249 welded stainless steel heat exchanger tubes engineered for high-efficiency thermal systems, shell-and-tube heat exchangers, surface condensers, boilers, and process reboilers across chemical processing, power generation, and industrial HVAC installations.
To ensure precise procurement matching for engineering teams and fabricators, our heat exchanger tubes are strictly categorized by manufacturing process and compliance standards:
• ASTM A213 Seamless Heat Exchanger & Boiler Tubes: Precision cold-drawn or cold-pilgered from solid austenitic or duplex billets without longitudinal welds. Specially engineered for high-pressure, elevated-temperature environments (superheaters, high-pressure feedwater heaters, and volatile chemical reactors) where uniform circumferential hoop strength and zero weld-zone vulnerability are mandatory.
• ASTM A249 Welded Heat Exchanger & Condenser Tubes: Precision roll-formed and longitudinally welded from cold-rolled strip with 100% in-line weld bead rolling/working and full solution annealing. Delivers superior wall thickness uniformity (tight ±10% WT tolerance), concentricity, and optimized heat transfer economics for HVAC chillers, surface condensers, brewery/dairy pasteurizers, and low-to-medium pressure reboilers.
Available in austenitic grades (304, 304L, 316, 316L, 321, 310S, 904L) and duplex alloys (2205 / S31803 / S32205) in straight lengths up to 24 meters or custom U-bent configurations with localized bend stress-relief annealing. Every heat exchanger tube undergoes 100% eddy current testing and hydrostatic proof testing, fully certified with EN 10204 3.1 Mill Test Certificates under our ISO 9001:2015 quality management system.
For project-specific sizes, tolerances, and testing requirements, explore our custom stainless steel tube fabrication service.
Pressure-Tight Heat Exchanger Tubes: 100% Hydrostatic & 100% Eddy-Current Tested
ASTM A213 seamless and ASTM A249 welded heat exchanger straight tubes and precision U-bends from our Foshan and Wenzhou partner factories.
Specifications
Available Sizes by Standard
Markets: N. America — seamless heat exchanger, boiler tube, condensers (Tube · OD-based)
| OD (mm) | BWG | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|---|
| 6.35 | 20 | 0.89 | ±0.10mm | ±10% |
| 9.53 | 18 | 1.24 | ±0.10mm | ±10% |
| 12.70 | 16 | 1.65 | ±0.10mm | ±10% |
| 15.88 | 16 | 1.65 | ±0.10mm | ±10% |
| 19.05 | 16 | 1.65 | ±0.10mm | ±10% |
| 22.23 | 16 | 1.65 | ±0.10mm | ±10% |
| 25.40 | 14 | 2.11 | ±0.15mm | ±10% |
| 31.75 | 14 | 2.11 | ±0.15mm | ±10% |
| 38.10 | 12 | 2.77 | ±0.15mm | ±10% |
| 44.45 | 12 | 2.77 | ±0.20mm | ±10% |
| 50.80 | 10 | 3.40 | ±0.25mm | ±10% |
| 63.50 | 10 | 3.40 | ±0.30mm | ±10% |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 317L, 321, 347, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A1016 (A213 seamless / A249 welded), EN ISO 1127, JIS G3463, or GB/T general tolerance tables
Markets: N. America — welded austenitic boiler, superheater, heat exchanger & condenser tube
| OD (mm) | BWG | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|---|
| 6.35 | 20 | 0.89 | ±0.10mm | ±10% |
| 9.53 | 18 | 1.24 | ±0.10mm | ±10% |
| 12.70 | 16 | 1.65 | ±0.10mm | ±10% |
| 15.88 | 16 | 1.65 | ±0.10mm | ±10% |
| 19.05 | 16 | 1.65 | ±0.10mm | ±10% |
| 22.23 | 16 | 1.65 | ±0.10mm | ±10% |
| 25.40 | 14 | 2.11 | ±0.15mm | ±10% |
| 31.75 | 14 | 2.11 | ±0.15mm | ±10% |
| 38.10 | 12 | 2.77 | ±0.15mm | ±10% |
| 44.45 | 12 | 2.77 | ±0.20mm | ±10% |
| 50.80 | 10 | 3.40 | ±0.25mm | ±10% |
| 63.50 | 10 | 3.40 | ±0.30mm | ±10% |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 317L, 321, 347, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A1016 (A213 seamless / A249 welded), EN ISO 1127, JIS G3463, or GB/T general tolerance tables
Markets: Europe, Middle East — pressure piping, petrochemical, power gen heat exchangers
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 17.2 | 2.0 | ±0.2mm (±1.2%) | ±0.25mm (±12.5%) |
| 21.3 | 2.3 | ±0.2mm (±0.9%) | ±0.29mm (±12.5%) |
| 26.9 | 2.3 | ±0.2mm (±0.7%) | ±0.29mm (±12.5%) |
| 33.7 | 2.6 | ±0.3mm (±0.9%) | ±0.33mm (±12.5%) |
| 48.3 | 2.6 | ±0.36mm (±0.75%) | ±0.33mm (±12.5%) |
| 60.3 | 2.9 | ±0.45mm (±0.75%) | ±0.36mm (±12.5%) |
| 76.1 | 2.9 | ±0.57mm (±0.75%) | ±0.36mm (±12.5%) |
| 114.3 | 3.6 | ±0.86mm (±0.75%) | ±0.45mm (±12.5%) |
| 168.3 | 4.0 | ±1.26mm (±0.75%) | ±0.50mm (±12.5%) |
| 219.1 | 6.3 | ±1.64mm (±0.75%) | ±0.79mm (±12.5%) |
| 355.6 | 8.0 | ±3.56mm (±1.0%) | ±1.00mm (±12.5%) |
| 508.0 | 10.0 | ±5.08mm (±1.0%) | ±1.25mm (±12.5%) |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 317L, 321, 347, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A1016 (A213 seamless / A249 welded), EN ISO 1127, JIS G3463, or GB/T general tolerance tables
Markets: Japan, Southeast Asia — stainless steel boiler & heat exchanger tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 17.3 | 1.2 | ±0.25mm | +0.40mm / −0 |
| 21.7 | 1.2 | ±0.25mm | +0.40mm / −0 |
| 27.2 | 1.5 | ±0.25mm | +0.40mm / −0 |
| 34.0 | 1.5 | ±0.25mm | +0.40mm / −0 |
| 48.6 | 2.0 | ±0.25mm | +22% / −0 (+0.44mm) |
| 60.5 | 2.0 | ±0.30mm | +22% / −0 (+0.44mm) |
| 89.1 | 2.5 | ±0.40mm | +22% / −0 (+0.55mm) |
| 114.3 | 2.5 | +0.40 / −0.60mm | +22% / −0 (+0.55mm) |
| 165.2 | 3.0 | +0.40 / −1.20mm | +22% / −0 (+0.66mm) |
| 216.3 | 3.5 | +0.40 / −1.60mm | +22% / −0 (+0.77mm) |
| 355.6 | 4.5 | +0.40 / −1.60mm | +22% / −0 (+0.99mm) |
| 609.6 | 6.0 | +0.40 / −1.60mm | +22% / −0 (+1.32mm) |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 317L, 321, 347, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A1016 (A213 seamless / A249 welded), EN ISO 1127, JIS G3463, or GB/T general tolerance tables
Markets: China domestic & Belt-and-Road / Chinese-contracted EPC — boiler & heat exchanger tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6 | 1.0 | ±0.10mm (±1.7%) | ±0.12mm (±12.5%) |
| 14 | 1.5 | ±0.15mm (±1.1%) | ±0.19mm (±12.5%) |
| 25 | 2.0 | ±0.25mm (±1.0%) | ±0.25mm (±12.5%) |
| 34 | 2.5 | ±0.34mm (±1.0%) | ±0.31mm (±12.5%) |
| 45 | 3.0 | ±0.45mm (±1.0%) | ±0.38mm (±12.5%) |
| 76 | 3.5 | ±0.76mm (±1.0%) | ±0.44mm (±12.5%) |
| 108 | 4.0 | ±1.08mm (±1.0%) | ±0.50mm (±12.5%) |
| 159 | 4.5 | ±1.59mm (±1.0%) | ±0.56mm (±12.5%) |
| 219 | 5.0 | ±2.19mm (±1.0%) | ±0.63mm (±12.5%) |
| 273 | 5.5 | ±2.73mm (±1.0%) | ±0.69mm (±12.5%) |
| 377 | 6.0 | ±3.77mm (±1.0%) | ±0.75mm (±12.5%) |
| 630 | 7.0 | ±6.30mm (±1.0%) | ±0.88mm (±12.5%) |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 317L, 321, 347, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A1016 (A213 seamless / A249 welded), EN ISO 1127, JIS G3463, or GB/T general tolerance tables
Where added external surface area is required for heat transfer, compare this range with our Stainless Steel Low Fin Tube.
Get Your Heat Exchanger Tube Quote
Sourcing precision stainless steel heat exchanger tubing (straight or U-bent) for shell-and-tube heat exchangers, surface condensers, boilers, or chemical chillers? Contact our thermal engineering desk for live mill pricing, tight wall tolerances, custom cut lengths, and flexible trial orders (100–300 kg MOQ supported).
Immediate heat exchanger tube pricing, production schedule planning, and raw billet stock checks within 2 hours.
Short tube cuts provided for tubesheet roller expansion testing, orbital seal weld trials, and metallography.
Verify tubesheet hole fit, baffle clearance, or bundle assembly parameters with low-MOQ trial orders.
100% Eddy-Current / Hydrostatic testing, flattening, flaring, reverse-bend tests, and full 3.1 certification.
Standards
→ Scroll right for full chemistry & mechanical data
| Grade | US (UNS) | EN (W.Nr.) | Japan (JIS) | China (GB/T) | C % (Max) | Si % (Max) | Mn % (Max) | P % (Max) | S % (Max) | Cr % | Ni % | Mo % | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2205 Duplex* | S32205 | 1.4462 | SUS329J3L* | 022Cr23Ni5Mo3N* | 0.030 | 1.00 | 2.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 655 MPa (95 ksi) | 450 MPa (65 ksi) | 25% | ≤31 HRC / ≤293 HB |
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-11.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 317L | S31703 | 1.4438 | SUS317L | 022Cr19Ni13Mo3 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 347 | S34700 | 1.4550 | SUS347 | 06Cr18Ni11Nb | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-13.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 904L* | N08904 | 1.4539 | N/A | 015Cr20Ni18Mo6CuN* | 0.020 | 1.00 | 2.00 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | 490 MPa (71 ksi) | 215 MPa (31 ksi) | 35% | ≤90 HRB / ≤200 HV |
- Standards Conformance: ASTM A213/A249 · EN 10216-5/10217-7 · DIN 17456/17458 · JIS G3459/G3463 · GB/T 24593/13296 · ISO 1127
- Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
- Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.
- Cross-Reference Note: 2205 duplex and 904L JIS/GB cross-reference figures are compiled from secondary industry sources — please confirm exact specification and heat-specific mill test certificate with TeCarve for critical applications.
Features
• High thermal efficiency
• Superior corrosion resistance
• Customizable configurations
• Smooth internal surface for optimized flow
Applications
For critical heat exchanger and condenser bundles, explore how engineers and procurement teams can verify our partner factories’ testing, hydro-test parameters, eddy current inspection, and MTC documentation prior to shipment.
Quality Control
• 100% Eddy current and hydraulic proof testing
• PMI and chemical composition analysis
• Dimensional inspection (OD, WT, Length)
• Third-party inspection available on request
What Quality Tests Does TeCarve Heat Exchanger Tube Pass Before Delivery?
Every heat exchanger tube batch runs 100% flattening, flaring/expansion, and bending tests to confirm the tube can go through tube-to-tubesheet expansion (tube expanding) in the field without cracking; welded heat exchanger tube additionally gets a reverse flattening test on the weld seam. This is on top of the 100% eddy current and hydraulic proof testing already covered above.
For projects specifying it, an intergranular corrosion (IGC) test to ASTM A262 (Practice E or Practice A) or GB/T 4334 can also be performed — this is a project-specified test rather than a standard default on every order, so flag it at inquiry stage if your specification requires it.
Why Would a Heat Exchanger Tube Fail a Hydrostatic Pressure Test?
A hydrostatic test rarely creates a problem — it reveals one that already existed. Common root causes include pitting or crevice corrosion that has locally thinned the wall, stress corrosion cracking from chloride exposure (cracks can be invisible before pressure is applied), weld or fabrication defects, wrong alloy for the service environment, and mechanical wear at baffles or tube-to-tubesheet joints from vibration.
Because these defects are often not visible before testing, TeCarve runs 100% eddy current and hydraulic proof testing on every heat exchanger tube batch, plus PMI (positive material identification) and chemical composition analysis to confirm the correct alloy was actually supplied — catching wall-thinning and material-grade mismatches before they reach a customer's pressure test.
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Heat Exchanger Tube Factory & Inspection Photos
Real product, inspection, packaging and loading photos.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We tailor stainless steel heat exchanger pipe and tube by seamless or welded construction, diameter, wall thickness, requested length, grade, and annealed, polished, pickled, or custom finish.
Low MOQ & Rapid Prototyping
MOQ is as low as 100–300 kg for flexible trial orders, with small batch customization and sample production supported, helping you shorten your development cycle and market entry.
Optimized Lead Time
In-stock standard sizes ship within 7–10 days. Custom specifications typically ship within 10–25 days after deposit, depending on order volume, dimensions, and surface finish. The full cycle—from inquiry and drawing confirmation through sampling, production, inspection, and dispatch—typically takes 33–55 days for custom items.
Global Logistics & On-Time Delivery
For heat exchanger tube deliveries worldwide, PVC wrapping and end caps are paired with anti-corrosion and moisture protection to preserve tube ends and surfaces.
How your order is made, checked and shipped
Tube forming at the partner factory
Heat treatment (annealing)
Dimensional inspection
Alloy verification with a handheld analyzer
Export packing
Container loading
What Global Buyers Say About TeCarve Tubing
“I've received the goods and everything is fine.”
“The goods already send to customers. I am waiting for the next order from them.”
“…there is no need of inspection this time… I trust in your product.”
Frequently Asked Questions
What standards apply to stainless steel heat exchanger tubes?
Our heat exchanger tubes comply with ASTM A213 (seamless), ASTM A249 (welded), TEMA standards for shell-and-tube exchangers, EN 10216-5, and EN 10217-7. Available in grades TP304, TP304L, TP316, TP316L, TP321, TP347, and duplex 2205/2507.
What is the size range for heat exchanger tubes?
Standard heat exchanger tube ODs range from 6 mm to 101.6 mm with wall thickness 0.5 mm to 4 mm. U-bend tubes and custom straight lengths are manufactured to TEMA or customer exchanger drawings.
What types of heat exchanger tubes does TeCarve supply?
We supply straight tubes, U-bend tubes, and low-fin tubes for shell-and-tube heat exchangers, condensers, reboilers, and coolers. All tubes undergo hydraulic proof testing; eddy-current NDT is available on request.
How do I choose between seamless and welded heat exchanger tubes?
Seamless tubes are preferred for high-pressure, high-temperature, or corrosive service where seam integrity is critical. Welded-and-drawn (W&D) tubes meet the same ASTM A249 standards and are a cost-effective alternative for the majority of heat exchanger applications.
What testing and documentation is provided with heat exchanger tubes?
Each batch is supplied with a full Mill Test Certificate (EN 10204 3.1) covering chemical analysis, mechanical properties, and heat number traceability. Proof pressure, flaring, flattening, and eddy-current NDT reports are available per ASTM and TEMA requirements.
Does TeCarve perform both hydrostatic and eddy current testing on heat exchanger tubes?
Yes. While ASTM A249 Section 13.6 and JIS G3463 permit choosing either hydrostatic or nondestructive electric testing, every TeCarve heat exchanger tube receives both 100% hydrostatic testing and 100% eddy current testing before dispatch.
What mechanical and corrosion tests are conducted on heat exchanger tubes?
We perform 100% flattening, flaring (expansion), and bending tests, plus reverse flattening on welded tubes. Intergranular corrosion testing per ASTM A262 Practice E or A is available on request.
Can TeCarve supply U-tubes bent to customer drawings?
Yes. We supply U-bent heat exchanger tubes formed to customer bending schedules, drawings, and radius tables.
Contact TeCarve