a269 tubing
2. Standard: ASTM A269 / ASME SA269, governing nominal-wall tubing for general industrial service
3. Process: Cold drawn or cold rolled precision seamless, ensuring precise wall thickness and smooth inner bore
4. Size Range: Outside Diameter from 1/4" to 5" (6.35mm to 127mm) with strict decimal wall tolerances
5. Heat Treatment: Bright annealed (BA) in a hydrogen-protected atmosphere to guarantee absolute internal cleanness
6. Surface Finish: High-purity bright annealed or mechanical polished (180 Grit / 240 Grit / 320 Grit / 400 Grit)
7. Application: Instrumentation systems, pneumatic controls, hydraulic lines, and automotive fuel systems
8. Service Advantage: Low MOQ for trial orders, fast delivery from stock, and complimentary sample availability
9. Packaging: Tightly bundled with heavy-duty plastic wrapping or packed into customized export wooden cases
10. Key Advantage: Exceptional flexibility for effortless bending and flaring, maintaining zero leakage under vibration
A269 Tubing – Precision Seamless Stainless Steel Tubing for Instrumentation and General Service Applications
Hebei All Trust Steel Co., Ltd manufactures high-precision a269 tubing engineered specifically for instrumentation systems, hydraulic controls, and general corrosive-service environments. Our yearly capacity exceeds 15,000 tons of seamless and welded austenitic stainless steel tube in grades TP304, TP304L, TP316 and TP316L. Every length is 100% eddy current or hydraulically tested for zero-defect structural integrity. Thanks to our cold-drawn production method we are able to achieve wall thickness tolerances of up to ±0.05 mm, assuring flawless compatibility with compression fittings and ferrule systems in industrial applications worldwide.
What Makes Our A269 Tubing Different
The product solves critical operational challenges in high-vibration and high-purity environments. Unlike standard piping, this tubing features strict outside diameter and nominal wall specifications that enable leak-proof sealing with double-ferrule instrumentation fittings.
Our manufacturing leverages 100% virgin stainless steel materials with guaranteed nickel and chromium content. You'll never get recycled mixed-scrap alloys or under weight materials. Each batch is fully traceable to the heat number and has EN 10204 3.1/3.2 Mill Test Certificates.
The bright annealed finish offers an exceptionally smooth inner surface with regulated roughness (Ra < 0.8 μm). This cleanliness reduces bacterial development in the pharmaceutical fluid transfer and minimises pressure loss in pneumatic control lines.
Cold rolled with precision for great ductility. It can be bent, flared and threaded in situ without creating micro-fractures or stress lines in the structure, which is important for offshore oil rigs and automobile fuel systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | ASTM A269 / ASME SA269 / ASTM A213 / EN 10216-5 |
| Material Grade | TP304, TP304L, TP316, TP316L, TP321, TP347 |
| Manufacturing Process | Cold Drawn / Cold Rolled / 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 | 6 m / 12 m / Coiled Tubing / Custom Cut Length |
| Surface Finish | Bright Annealed (BA) / Solution Annealed & Pickled / Mechanical Polished |
| End Type | Plain End (PE) / Square Cut / Burr-Free Cleaned Ends |
| Hardness Limit | ≤ 90 HRB (ensures ferrule bite for leak-proof seals) |
| Tensile Strength | ≥ 515 MPa (75 ksi) |
| Yield Strength | ≥ 205 MPa (30 ksi) |
| Elongation | ≥ 35% |
| Testing Methods | Eddy Current Test / Ultrasonic Test / Hydrostatic Test / Air Under Water Test |
| Quality Certificates | EN 10204 3.1 & 3.2 MTC / ISO 9001:2015 |
| Packaging | Plywood Cases / Fumigated Wooden Boxes / Coiled on Wooden Spools / Plastic Caps Protection |
Why Choose Our Instrumentation Tubing
Material & Functional Superiority
This tubing is designed for critical instrumentation and general service loops and has excellent structural ductility and intergranular corrosion resistance. The smooth interior boundary layer ensures clean fluid flow, which is critical for gas chromatography and hydraulic systems.
Production Quality & Testing Rigor
Manufactured under comprehensive micro-tolerance frameworks, combining automated cold rolling lines with intensive eddy current monitoring. Air-under-water leak testing ensures absolute zero-defect structural integrity before dispatch.
Versatile Customization & Dimensional Sizing
Fully customizable into ultra-long coiled configurations or exact fixed straight segments. Adaptable imperial and metric outer diameter variations match precision compression ferrule fittings perfectly across global standards.
Key Applications You Can Trust
Chemical and Petrochemical Processing
Heat exchangers and process lines demand resistance to organic acids and caustic solutions under varying thermal loads. Our a269 tubing survives aggressive environments without stress corrosion cracking.
Instrumentation and Control Systems
Precision tolerances make this tubing the industry standard for pneumatic and hydraulic signal lines on offshore oil rigs. It survives extreme salt spray and high-pressure cycles without dimensional drift.
Pharmaceutical and Food/Beverage
High-purity bright annealed finish facilitates cleanroom fluid transfer. The smooth internal surface prevents bacterial growth and enables effective Clean-in-Place (CIP) protocols in sterile processing.
Automotive Fuel Systems
Exceptional flexibility permits effortless bending and flaring while maintaining zero leakage under continuous vibration—critical for modern fuel injection systems.
Quality Assurance You Can Depend On
Every manufacturing lot clears continuous online eddy current scans combined with comprehensive air-under-water bubble diagnostics or high-pressure hydrostatic verification. You receive complete documentation including:
- EN 10204 3.1/3.2 Mill Test Certificates
- PMI (Positive Material Identification) reports
- Dimensional inspection records
- Flaring and flattening test results
- Hardness verification (Rockwell/Vickers)
Third-party inspection support from SGS, TÜV, BV, DNV, and ABS is available upon request. We maintain full material traceability from raw heat to final shipment.
FAQ
Q：What is the primary operational distinction between the product and standard a312 pressure piping?
A：ASTM product is specifically tailored for precision instrumentation, general service loops, and compression systems. It prioritizes exceptional wall concentricity and cold-bending flexibility over high-volume flow capacity.
Q：How does this product maintain structural integrity when subjected to tight radius mechanical bending?
A：The tubing utilizes a highly ductile, fully solution-annealed crystalline matrix that permits flawless field bending and flaring without developing micro-fractures or structural boundary stress lines.
Q：What stringent leak-detection diagnostics must this tubing clear prior to factory dispatch?
A：Every manufacturing lot must clear continuous online eddy current scans combined with comprehensive air-under-water bubble diagnostics or high-pressure hydrostatic pressure verification.
Q：Are the outer and inner diameters optimized to interface seamlessly with global compression fittings?
A：Yes, we maintain ultra-precise micro-tolerance limits on both internal and external circumferences, ensuring a perfect flush seal with standard double-ferrule instrumentation fittings.
Q：What custom length and packaging configurations can be requested for long-distance remote control lines?
A：We offer customized straight segments up to 12 meters as well as continuous ultra-long coiled tubing lines wrapped on secure wooden spools to minimize field joints.
Contact Us
Partner with Hebei All Trust Steel for precision a269 tubing backed by 15+ years of manufacturing expertise and global logistics support. Contact our technical team at info@hballtrust.com today for quotations, samples, or project consultation.
