astm a269 tp304l tube
2. Standard: ASTM A269 / ASME SA269, governing nominal-wall stainless steel tubing for general service industries
3. Process: High-precision precision cold drawn or cold rolled seamless, ensuring exceptional dimensional uniformity
4. Size Range: Outer Diameter from 1/4" to 5" (6.35mm to 127mm) with strict control on decimal wall calibrations
5. Heat Treatment: Full solution annealing in controlled atmosphere or hydrogen-protected vacuum furnaces
6. Surface Finish: High-purity bright annealed (BA) mirror look, smooth acid-pickled, or precise mechanical polished
7. Application: General industrial instrumentation lines, chemical dosing loops, pneumatic networks, and hydraulic lines
8. Service Advantage: Low MOQ for small-batch trial orders, fast delivery from extensive stock, and full MTC certification
9. Packaging: Secure international bundle packing wrapped in waterproof canvas or safely nested in solid plywood crates
10. Key Advantage: Effectively prevents harmful carbide precipitation during field welding to maintain absolute joint density
ASTM A269 TP304L Tube – Low-Carbon Stainless Steel Tubing for Critical Instrumentation & High-Purity Applications
ASTM A269 TP304L tube is a precisely built, low carbon austenitic stainless steel tubing solution to demanding fluid handling, instrumentation and chemical processing settings. Manufactured by Hebei All Trust Steel Co., Ltd, This product is manufactured to stringent ASTM A269/ASME SA269 specifications with carbon content controlled to ≤0.030% to remove the possibility of weld-zone sensitisation.
Our plant has an annual capacity of more than 15,000 tons and provides tubes from 1/16" to 5" OD (1.59-127 mm) with full 100% hydraulic and eddy current testing, accompanied by EN 10204 3.1/3.2 Mill Test Certificates. Each lot is precisely cold-drawn or cold-rolled and then hydrogen protected brilliant annealed (BA) for ultra smooth interior surfaces appropriate for high purity pharmaceutical, food grade and instrumentation systems.
Technical Specifications
| Parameter | Details |
|---|---|
| Standard | ASTM A269 / ASME SA269 / ASTM A213 / EN 10216-5 |
| Material Grade | TP304L (UNS S30403 / 1.4306) – Extra Low Carbon |
| Manufacturing Process | Cold Drawn / Cold Rolled / Precision Seamless / Automatic Welded |
| Outer Diameter (OD) | 1/16" – 5" (1.59 mm – 127 mm) |
| Wall Thickness (WT) | 0.010" – 0.200" (0.25 mm – 5.08 mm) |
| Length | 5.8 m / 6 m / 11.8 m / 12 m / Custom Cut / Coiled Tubing |
| Surface Finish | Bright Annealed (BA) / Annealed & Pickled / Mirror Polished |
| End Type | Plain End (PE) / Square Cut / Burr-Free Cleaned Ends |
| Testing | Eddy Current / Ultrasonic / Hydrostatic / Air Under Water / PMI Analysis |
| Certifications | EN 10204 3.1 & 3.2 MTC / ISO 9001:2015 / CE / PED |
| Packaging | Plywood Cases / Fumigated Wooden Boxes / Waterproof Wrapping / Plastic End Protectors |
Why Choose Our ASTM A269 TP304L Tube?
Superior Weld-Zone Integrity
The product has a very low carbon content (max. 0.030%) which excludes the precipitation of chromium carbide during welding operations. The metallurgical benefit here is that it avoids intergranular corrosion at the heat affected zones . This will allow your produced assemblies to remain structurally sound over time without post weld annealing. Field engineers enjoy shorter installation times and less manufacturing cost.
Extraordinary Dimensional Accuracy
Our tubes are cold drawn in many stages over precise mandrels to a tolerance of +/-0.05 mm for flawless concentricity between the inner and the outer diameter. This close dimensional control provides leak-free compression fitting assembly and trouble-free integration into high pressure instrumentation networks to 5000 psi.
Surface Internal Ultra-clean
The BA process involves bright annealing of each batch in a hydrogen-purged environment, resulting in a mirror-finish interior with roughness values less than Ra 0.4 μm. This pharmaceutical grade surface decreases particle adherence and the danger of bacterial colonisation and optimises the flow properties of fluids in sterile transfer systems.
Comprehensive Testing Protocol
We implement 100% non-destructive testing combining continuous eddy current scanning and air-under-water leak detection. Mechanical validation includes flaring tests, flattening tests, and ASTM A262 Practice E intergranular corrosion testing. Third-party inspection from SGS, BV, or TÜV is readily available upon request.
Core Industrial Applications
Chemical & Petrochemical Processing
This tube is well suited for heat exchanger bundles and instrumentation lines carrying organic acids, sulphurous chemicals and chloride containing solutions. The low-carbon chemistry avoids stress corrosion cracking in thermal cycling conditions at high pressure.
Pharmaceutical & Biotech
This astm a269 tp304l tube is used in clean-room fluid transfer systems to maintain contamination-free settings for drug production. The composition is weld-safe, meaning carbon migration that might jeopardise sterile validation methods are eliminated.
Marine & Offshore Engineering
Hydraulic control systems for subsea valves demand the combination of salt-spray resistance and vibration tolerance that only properly annealed TP304L can deliver. Our tubes withstand continuous exposure to seawater without pitting or crevice corrosion.
Food & Beverage Equipment
The smooth BA finish is ideal for hygienic piping in dairy processing, brewing systems and juice production lines to guarantee optimal CIP (Clean-In-Place) operations and conformity to FDA and 3-A sanitary standards.
Customization Capabilities
We support extensive dimensional flexibility to meet compact system constraints:
- Micro-diameter calibrations down to 1/16 inch for analytical instrumentation
- Metric and fractional sizing options to match international connection standards
- Specialized wall thickness profiles for weight-sensitive aerospace applications
- Fixed-length cutting with square, beveled, or threaded end preparations
- Custom surface treatments including electropolishing to Ra 0.25 μm
Our technical team offers CAD drawing verification and help for stress computation and corrosion resistance studies to optimise material choices for your individual operating circumstances.
Quality Assurance & Certifications
Four-Stage Inspection Process
Raw Material Verification: Spectrographic examination validates chromium (18.0-20.0%), nickel (8.0-11.0%) and carbon (≤0.030%) content with complete heat number traceability.
Production Monitoring: Real time dimensional inspection during cold-drawing assures consistency of wall thickness within ASTM tolerance limits.
Non-destructive Testing: Automated eddy current devices for longitudinal and transverse fault detection; hydrostatic testing for burst pressure performance.
Final Documentation: Each shipment is accompanied with Original EN 10204 3.1 certifications, PMI reports and intergranular corrosion test reports.
International Compliance
Process Piping Codes (ASTM B31.3), Pressure Equipment Directive (PED 2014/68/EU), and API 5L Pipelines all certify that this product is up to code. You may be certain that each batch will adhere to the exact same production procedure thanks to ISO 9001:2015 Certification.
Packaging & International Logistics
Export Protectionism
Each tube is encased in a plastic bag with soft foam separators. The tubes are tightly bundled in hexagonal formations. Multi-model carriage of heavy duty plywood containers with fumigation certifications to avoid surface damage.
Shipping Terms Flexible
We ship from main Chinese ports Shanghai, Ningbo, Tianjin and Qingdao on FOB, CFR, CIF or DDP basis. Full project procurement lowers freight costs in mixed container loadings with pipe fittings, flanges and valves.
Rapid Delivery Timelines
- Stock orders: 3–5 days
- Custom specifications: 15–20 days
- Large-volume projects: 25–30 days with priority scheduling options
FAQ
Q：What key performance parameters make this product ideal for high-precision laboratory loops?
A：This premium tube combines remarkable cold-bending flexibility with a refined low-carbon chemistry that restricts chromium carbide precipitation during welding, ensuring excellent structural ductility and joint area safety.
Q：How does your factory achieve the extremely smooth interior surface finish required for smooth fluid dynamics?
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 diagnostic leak-testing protocols must this specific tube batch clear prior to global maritime delivery?
A：Every manufacturing lot undergoes 100% mandatory non-destructive testing, passing through continuous automated internal eddy current scanning loops and comprehensive air-under-water pressure bubble tests.
Q：What precise micro-dimensional customization spectrums can be achieved to satisfy compact system boundaries?
A：We support extreme calibration versatility, accommodating micro-diameters down to 1/16 inch, tailored metric and fractional outer diameters, and specialized tight-tolerance wall profiles.
Q：How is this fragile instrumentation tubing packaged to prevent surface scratches during transit?
A：The tubes are packed individually inside protective plastic bag sleeves, arranged carefully with soft foam separators, and secured firmly inside reinforced seaworthy plywood crates.
Contact Us
Need material selection guidance or custom dimensional specifications for astm a269 tp304l tube? Our engineering team responds within 1 hour during business hours. Email us at info@hballtrust.com for quotations, technical datasheets, or third-party inspection arrangements.
