ASTM A269 Welded Austenitic Stainless Steel Tubing

Stainless Steel Tubing for General Service

As an ASTM A269 manufacturer and stainless steel tube supplier, YES Stainless International produces nominal-wall, seamless, and welded austenitic tubing in 304/304L/316/316L/321/347 for corrosion-resistant service. Our ASTM A269 tubing is heat-treated for consistency, held to tight dimensional tolerances, and supplied with clean, burr-free ends for orbital welding. Each lot includes EN 10204 3.1 MTC and full heat traceability under an ISO 9001 system, with optional NDT, PMI, flaring/flattening tests, fixed-length cutting, and export-ready packaging for global shipments.

What is ASTM A269 Stainless Steel Tubing?

ASTM A269 is the standard for nominal wall, seamless, and welded austenitic stainless steel tubing used in general corrosion-resistant service at low or high temperatures. ASTM A269 defines chemical composition, heat treatment, dimensional tolerances, and verification tests such as flaring, flange, hardness, and reverse flattening to ensure consistent performance. Typical grades include 304, 304L, 316, and 316L. Tubes are supplied heat-treated with smooth, cleanable surfaces suitable for instrumentation, heat exchangers, fluid transfer, and plant utilities.

Product Overview of ASTM A269 Stainless Steel Tubing

Stainless Steel Grade	Dimension	Surfaces	Inspections & Tests
304 / 304L / 316 / 316L (321 / 347 on request)	OD: 25~114.3mm WT: 1.2~2.11mm Standard Length: 6M	Ap, BA, Mechanical polish or Electropolish on request.	Chemical composition, mechanical properties, hydrostatic, dimensional, and appearance per ASTM A269 and PO/ITP.

Key Features of ASTM A269 Stainless Steel Tubing

Annealed as Standard: All ASTM A269 tubes are supplied in the annealed condition, delivering the ductility, corrosion resistance, and weldability needed for reliable bending, flaring, and joining in service.
Tight Dimensional Tolerance: Controlled OD, wall thickness, ovality, and straightness according to ASTM standard, supporting precision fluid and gas control, clean fabrication, and consistent fit-up for instrumentation and plant utilities.
Typical Applications: Chemical & petrochemical piping, heat exchangers, hydraulic/pneumatic systems, food processing (non-sanitary), and instrumentation lines where stable dimensions and corrosion resistance are critical.

Product Specification of ASTM A312 Stainless Steel Pipe

Outside Diameter		Thickness (mm)
inch	mm	1.2	1.25	1.5	1.6	1.65	2.0	2.11
¾’’	19	●	●	●	●	●	●	●
⅞’’	22.2	●	●	●	●	●	●	●
1'’	25.4	●	●	●	●	●	●	●
1 ¼’’	31.8	●	●	●	●	●	●	●
1 ½’’	38.1	●	●	●	●	●	●	●
2'’	50.8	●	●	●	●	●	●	●
2 ½’’	63.5	●	●	●	●	●	●	●

FAQs

1. Which grades are available?

Common grades include 304/304L, 316/316L, 321, and 347. For chloride-bearing media or aggressive cleaners, 316/316L is typically recommended.

2. Are ASTM A269 tubes supplied annealed?

Yes. All ASTM A269 tubes are supplied in the annealed (solution-annealed) condition to ensure ductility, corrosion resistance, and weldability.

3. What tests are required by ASTM A269?

Standard verification includes flaring, flange, hardness, and reverse-flattening tests. On request, we provide hydrostatic or NDT (e.g., eddy current/ultrasonic) to match your purchase order.

4. How are stainless tubes packaged and marked for export?

Tubes ship with end caps, moisture control, and bundle/box packing. Clear shipping marks and labels show grade, size, ASTM A269, and heat/lot numbers for full traceability.

5. What’s the difference between ASTM A269 and ASTM A270?

A269 covers general/instrumentation tubing. A270 adds sanitary (hygienic) surface requirements for food, beverage, and pharma. For hygienic lines, specify ASTM A270 (or A269 with defined Ra/EP targets) depending on your validation needs.

6. What is the minimum order quantity (MOQ)?

Our stainless steel pipes and tubes are typically supplied in 6 m lengths. To reduce damage risk and optimize freight, we recommend a full-container load of about 20 MT. However, we also accept smaller orders. Share your size mix and destination, and we will propose safe packing and the most economical shipping plan.