astm a213 tp304l tube
2. Standard: ASTM A213 / ASME SA213, standard specification for seamless boiler, superheater, and heat-exchanger tubes
3. Process: 100% solid-billet cold drawn or cold rolled seamless, eliminating any directional heat-affected zone flaws
4. Size Range: Outer Diameter from 3.18mm to 127mm with strict dimensional tolerances to ensure tight tube-sheet fitting
5. Heat Treatment: Regulated solution annealing followed by rapid cooling to maximize grain refinement and structural softness
6. Surface Finish: High-purity bright annealed (BA) mirror look, smooth acid-pickled, or precise mechanical polished
7. Application: Chemical heat exchangers, petrochemical cooling coils, pharmaceutical condensers, and boiler feedback lines
8. Service Advantage: Sourced from tier-one steel billets, full grain size testing compliance, and MTC 3.1 provided with shipment
9. Packaging: Each tube individually plastic-sleeved, securely nested in robust export plywood cases to prevent transport bending
10. Key Advantage: Restricts harmful carbide precipitation during tube-to-sheet welding to maintain absolute heat-exchanger joint safety
ASTM A213 TP304L Tube – Low-Carbon Heat Exchanger Solution for Weld-Critical Industrial Systems
Hebei All Trust Steel Co., Ltd specializes in manufacturing high-integrity astm a213 tp304l tube designed for demanding boiler, heat exchanger, and chemical processing applications. Seamless tubes are cold drawn from extremely low carbon austenitic stainless steel (UNS S30403) with a maximum carbon concentration of 0.035% to minimise intergranular corrosion in weld heavy systems. We produce over 15,000 tons a year, we can test 100% hydraulically and we offer outer diameters from 3.18 mm to 127 mm. We provide precision engineered tubing with full EN 10204 3.1/3.2 MTC's and full traceability of all materials used for industrial projects worldwide.
Why Choose Low-Carbon TP304L Tubes for Your Heat Transfer Systems?
This product solves a major engineering problem, carbide precipitation when welding. Standard austenitic stainless steels are subject to chromium depletion at grain boundaries during heat cycling between 425 and 870 °C. This sensitisation results in fast intergranular attack in corrosive conditions.
Our TP304L version limits carbon to less than 0.035%, ensuring chromium availability in weld zones. You get weld-ready tube. In most chemical processing applications this means no expensive post-weld heat treatment.
TP304L has shown resistance to organic acids, chloride stress corrosion and high temperature oxidation to 870°C intermittent use. Industries requiring frequent tube to tubesheet welding include petrochemical heat exchangers, pharmaceutical condensers and power plant superheaters.
Each tube is solution annealed at a minimum of 1040°C and then rapidly water quenched. This produces a uniform austenitic structure of No. 7 grain size or finer, providing maximum ductility and corrosion resistance across the tube wall.
Technical Specifications of ASTM A213 TP304L Tube
| Parameter | Specification |
|---|---|
| Standard | ASTM A213 / ASME SA213 / ASTM A269 / EN 10216-5 |
| Grade | TP304L (UNS S30403 / 1.4306) |
| Process | Cold Drawn / Cold Rolled Seamless |
| Outer Diameter | 3.18–127 mm (1/8"–5") |
| Wall Thickness | 0.38–12.7 mm (0.015"–0.500") |
| Length | 5.8 m / 6 m / 11.8 m / 12 m / Custom Cut |
| Surface Finish | Bright Annealed (BA) / Acid Pickled / Mechanical Polished |
| End Type | Plain End / Square Cut / Beveled (Custom) |
| Tensile Strength | ≥485 MPa |
| Yield Strength | ≥170 MPa |
| Elongation | ≥35% |
| Hardness | ≤192 HBW / ≤90 HRB |
| Carbon Content | ≤0.035% |
| Chromium | 18.0–20.0% |
| Nickel | 8.0–11.0% |
| Testing | Eddy Current / Ultrasonic / Hydrostatic / ASTM A262 Practice E |
| Certificates | EN 10204 3.1/3.2 MTC / ISO 9001:2015 |
| Packaging | Plywood Cases / Plastic End Caps / Waterproof Wrapping |
Core Manufacturing Advantages
Material Integrity & Chemistry Control
We use 100% virgin stainless steel billets from ISO certified mills with confirmed nickel and chromium content. Spectrographic study. This product will be resistant to sensitisation in all welding conditions with carbon levels below 0.035%.
Cold Drawing Process of Precision
Micro-tolerance mandrels in our cold drawing procedures provide wall thickness consistency within +/-0.05 mm. This accuracy allows for constant heat transfer efficiency and accurate tube to tubesheet fit-up in small exchanger bundles.
Comprehensive Quality Validation
Every production batch clears multi-stage inspection protocols. Continuous eddy current scanning detects subsurface defects. Flaring and flattening tests verify ductility without cracking. High-pressure hydrostatic testing confirms leak-proof integrity at 1.5× design pressure.
For weld-critical applications, we perform ASTM A262 Practice E intergranular corrosion testing. This Strauss Test validates that low carbon content successfully prevents grain boundary chromium depletion during thermal exposure.
Surface Finish Options
Choose from three finishes based on your system cleanliness requirements:
- Bright Annealed (BA): Hydrogen-purged annealing delivers mirror-smooth internal surfaces with minimal fluid friction—ideal for pharmaceutical and food processing lines.
- Acid Pickled: Chemical descaling removes heat tint and mill scale, providing uniform passive layer formation.
- Mechanical Polished: Progressive abrasive polishing achieves Ra ≤0.4 μm surface roughness for high-purity applications.
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Industrial Application Scenarios
Petrochemical Heat Exchangers
Your sulfur-rich process streams demand tubing that withstands both high-pressure thermal cycling and aggressive chemical attack. The product combines excellent creep resistance with proven sulfidation resistance up to 760°C.
Seamless construction eliminates longitudinal weld seams—common failure points in fluctuating thermal environments. You gain reliable service life exceeding 100,000 operating hours in crude oil desalting units and catalytic cracker reboilers.
Pharmaceutical Condensers & Reactors
Regulatory compliance demands sanitary tubing resistant to organic acid corrosion and without metallic ion leaching. All BA-finished tubes fulfil the 3-A Sanitary Standards, with an interior surface roughness of less than 0.8 μm Ra.
Low carbon chemistry prevents carbide precipitation during Clean-In-Place (CIP) thermal cycles. Your equipment maintains validated corrosion resistance across repeated 121°C steam sterilization protocols.
Power Generation Superheaters
Boiler feedwater systems require tubing that maintains mechanical strength under sustained 540°C steam exposure. TP304L's austenitic structure provides superior oxidation resistance and creep-rupture strength compared to ferritic alternatives.
Our tubes support superheater outlet temperatures up to 600°C with minimal wall thinning. You reduce unplanned outages and extend boiler inspection intervals by 18–24 months.
Customization & Processing Capabilities
Hebei All Trust Steel adapts astm a213 tp304l tube specifications to your exact design requirements:
- Dimensional Flexibility: Custom wall schedules from thin-wall instrumentation tubing (0.38 mm) to heavy-wall high-pressure piping (12.7 mm)
- End Preparation: Square-cut plain ends, beveled edges for direct orbital welding, or threaded connections
- Length Precision: Laser-cut to ±1 mm tolerance for modular heat exchanger assembly
- Surface Treatment: Passivation per ASTM A967 to enhance corrosion resistance in chloride environments
- Bundle Configuration: Pre-assembled tube bundles with protective wrapping for reduced installation labor
Our engineering team provides CAD drawing verification, stress calculation support, and material selection guidance throughout your procurement cycle.
Quality Assurance & Documentation
Every shipment includes comprehensive certification packages:
- Mill Test Certificate (MTC): EN 10204 3.1 or 3.2 with heat number traceability
- PMI Report: Positive Material Identification confirming grade chemistry
- Dimensional Inspection: Wall thickness mapping and OD measurement records
- NDT Records: Eddy current and hydrostatic test documentation
- Corrosion Test Results: ASTM A262 Practice E intergranular corrosion certification
Third-party inspection by SGS, TÜV, or DNV is available upon request. We support witness testing at our facility or independent laboratory validation.
Logistics & Packaging
Export-Grade Protection
Individual plastic sleeves to avoid scratching in transport. Tubes are nested in fumigation-free wooden containers with foam separators and capable of withstanding 8-ton stacking loads.
Heavy grade steel strapping to secure bundles for container transport. Waterproof wrapping protects sea freight from moisture and salt damage.
Global Shipping Network
We ship from Shanghai, Ningbo, Tianjin, Qingdao, and Shenzhen ports with flexible trade terms:
- FOB: Factory-direct pricing for experienced importers
- CIF: Delivered cost including insurance and freight
- DDP: Door-to-door delivery with customs clearance handled
Lead times range from 3–5 days for stock items (5,000+ tons inventory) to 15–20 days for custom orders. Priority production scheduling reduces manufacturing time by up to 35% for urgent projects.
FAQ
Q：What key performance parameters prevent this product from experiencing weld zone failure?
A：This tube utilizes meticulously refined low-carbon chemistry that restricts chromium carbide precipitation during thermal assembly, preventing intergranular failure and protecting structural joint safety in damp thermal utility lines.
Q：How does your factory achieve optimal internal cleanliness needed for high-risk chemical plant pipelines?
A：The tube is precision cold-drawn over micro-tolerance mandrels and processed via hydrogen-purged bright annealing (BA) to lock in an ultra-clean, scale-free internal mirror surface finish that minimizes fluid friction.
Q：What precise non-destructive diagnostics verify that the wall is entirely leak-free prior to delivery?
A：Every single piece must clear continuous online eddy current scans combined with high-pressure hydrostatic leakage pressure validation or comprehensive dimensional laser thickness scanning.
Q：Can the dimensional parameters of this low-carbon series be customized to fit compact equipment blueprints?
A：Yes, we offer extensive manufacturing flexibility covering custom thin wall metrics, specialized metric variations, and clean deburred square-cut plain ends.
Q：How is this low-carbon boiler tubing packaged to prevent surface scratches during long-distance logistics?
A: Tubes are individually packaged in protective plastic bag sleeves, neatly placed with soft foam separators and tightly fastened in reinforced seaworthy timber boxes.
Q: What is the difference between TP304 and TP304L?
A: TP304L has a lower carbon limit (0.035% vs 0.08%) hence is more resistant to corrosion after welding without the need for post-weld heat treatment.
Q：Is the tube seamless or welded?
A：Per ASTM A213, it must be seamless. Welded versions fall under ASTM A249 specifications.
Contact Us
Ready to source weld-ready heat exchanger tubing for your next project with the astm a213 tp304l tube? Reach us at info@hballtrust.com for technical specifications and pricing.
