Stainless Steel Tubing — ASTM A269, A249, A270
YES Stainless International is a stainless steel tubing manufacturer for industrial and sanitary service. Our range includes ASTM A269, A249, and A270 in seamless and welded construction for general service, heat exchanger duty, and hygienic applications.
Overview
YES Stainless International supplies stainless steel tubing across four core specs: A269 (welded) for general/instrumentation service, A269 (seamless) for cleaner IDs and tighter pressure envelopes, A249 (welded) for heat-exchanger and boiler duty, and A270 (welded) for sanitary lines with verified roughness. Typical grades are 304/304L and 316/316L, furnished annealed with surfaces AP (annealed & pickled) or BA (bright annealed). For sanitary projects, we can provide Ra 20 / Ra 25 / Ra 32 with measurement records. For thermal duty, we follow A249’s weld cold-work and final heat-treatment intent for stable expansion into tube sheets. Every order is managed by a dedicated sales professional, backed by our engineering team, to ensure the stainless steel products meet your project specifications and performance requirements.
Products
Reliable general-service and instrumentation tubing.
ASTM A269 Welded Tubing
Seamless construction for higher purity and pressure.
ASTM A269 Seamless Tubing
Built for condensers, superheaters, and boilers
ASTM A249 Heat-Exchanger Tubing
Hygienic tubing with Ra-verified finishes.
ASTM A270 Sanitary Tubing
Key Features
- Material reliability: Grades 304/304L and 316/316L provide proven corrosion resistance across a wide range of media.
- Well Annealed Structure: Ductility, corrosion resistance, and weldability are restored for downstream fabrication.
- Surface options: AP/BA as baseline; mechanical polish or electropolish for sanitary (A270) when specified.
- Traceable paperwork: Every shipment can include EN 10204 3.1 MTC, dimensional records, and agreed inspection reports.
- Export protection: End caps, film wrap, and moisture control help preserve surface condition in transit.
product comparison
| Field | A269 — Welded | A269 — Seamless | A249 — Welded (HX/Boiler) | A270 — Welded (Sanitary) |
|---|---|---|---|---|
| Primary use | General/ instrumentation service | Instrumentation/ cleaner IDs & higher pressure | Heat-exchangers, condensers, superheaters, boilers | Food, beverage, and pharma service |
| Manufacturing | Strip formed + welded | Pierced billet, hot-rolled/cold-drawn | Strip formed + welded; post-weld cold-worked then heat treated | Strip formed + welded; sanitary polishing as ordered |
| Condition | Furnished annealed | Furnished annealed | Annealed after the required cold-work step | Annealed; sanitary polishing/electropolish optional |
| Surfaces | AP / BA (light polish optional) | AP / BA | AP / BA (clean, oxide-free) | Polished or electropolished per PO |
| Sanitary options | — | — | — | Ra 20 / Ra 25 / Ra 32 (ID/OD as specified), measurement report |
| Required tests (per spec) | Reverse-flattening, flange, hardness; hydrostatic or ECT as specified | Reverse-flattening, flange, hardness; hydrostatic or ECT as specified | Flattening, flange, reverse-bend, hardness/tension; 100% hydro or ECT | As per order: surface roughness check (Ra), visual/ID verification |
| Optional inspections | ECT, hydro; PMI on request | ECT, hydro; PMI on request | ECT/hydro; PMI | Ra report, borescope photos, passivation statement |
Quality & Documents
- Traceability: We provide EN 10204 3.1 MTC with heat/lot numbers and clear bundle tags.
- Inspection: Visual inspection is standard; hydrostatic, eddy current, and other NDT can be requested by the PO.
- Process control: Internal SOPs and ITPs align with applicable ASTM/ASME requirements in your specification.
As a stainless steel tubing manufacturer operating under ISO 9001, YES Stainless International controls materials, processes, and inspections from intake to release. Each shipment will include MTC 3.1, dimensional reports, and integrity test certificates. If you appoint a third party such as SGS, TÜV, BV, or Intertek, we coordinate onsite once your booking is confirmed, and the agency will issue the final report directly to you.
FAQs
1. What is the difference between A269 and A270?
A269 covers general-service tubing for instrumentation and process lines, while A270 adds hygienic surface requirements for food, beverage, and pharma applications, including Ra-verified finishes.
2. When should I choose seamless over welded in A269?
Select seamless when you need higher pressure margins, smoother IDs, or a seam-free construction. Choose welded for strong value and excellent dimensional uniformity.
3. How is A249 different from A269?
A249 is built for thermal duty—heat exchangers, condensers, and boilers. Welds are cold-worked before final heat treatment, supporting tube-sheet expansion and thermal cycling.
4. What finishes are available?
AP and BA are standard. For sanitary tubing, we offer polishing or electropolishing with Ra 20 / Ra 25 / Ra 32, as specified in your PO/ITP.
