Seamless
ASTM A213 Alloy & Stainless Tube
ASTM A213 seamless ferritic, austenitic, and duplex alloy-steel tubes for boilers, superheaters, and heat exchangers — T11, T22, T91, TP304, TP316, TP321, and duplex 2205.
ASTM A213 seamless tubes
OVERVIEW
The definitive tube spec for boilers and heat exchangers.
ASTM A213 covers the broadest range of seamless tube grades for high-temperature and corrosion-resistant service. It spans ferritic chrome-moly grades (T11, T22, T91) for boiler superheaters, austenitic stainless grades (TP304, TP316, TP321, TP347) for heat exchangers and chemical service, and duplex grades (S31803/2205) for chloride-bearing environments.
Global Seamless manufactures A213 tubes across the full grade range with in-house heat treatment, solution annealing, pickling, and 100% eddy current testing on every tube.
✓ Ferritic: T5, T9, T11, T12, T22, T91
✓ Austenitic: TP304/L, TP316/L, TP321, TP347
✓ Duplex: S31803 (2205)
✓ OD: 10 mm – 168 mm, WT: 0.89 – 14 mm
✓ IBR, PED, and NACE certified
✓ Austenitic: TP304/L, TP316/L, TP321, TP347
✓ Duplex: S31803 (2205)
✓ OD: 10 mm – 168 mm, WT: 0.89 – 14 mm
✓ IBR, PED, and NACE certified
ASTM A213 heat exchanger tubes
DIMENSIONAL SPECIFICATIONS
Available size range.
Cold Drawn Seamless (CDS)
| Grade Family | Grades | Max Temp | Application |
|---|---|---|---|
| Low Alloy | T11, T12 | ~540°C | Superheater, reheater |
| Medium Alloy | T22, T5, T9 | ~580°C | Boiler, refinery furnace |
| Advanced | T91 | ~620°C | Supercritical boiler |
| Austenitic SS | TP304/L, TP316/L, TP321 | ~750°C | Heat exchanger, chemical |
| Duplex | S31803 (2205) | ~300°C | Seawater, chloride service |
APPLICATIONS & INDUSTRIES
Where these tubes get used.
MATERIAL GRADES
Ferritic · austenitic · duplex.
FERRITIC
T11 · T22 · T91
Chrome-moly grades for boiler superheaters and high-temperature service.
AUSTENITIC
TP304L · TP316L
Stainless grades for heat exchangers, chemical, and pharmaceutical service.
DUPLEX
2205
Duplex for seawater-cooled exchangers and chloride-bearing process streams.
TECHNICAL ARTICLES
Latest insights on alloy and stainless tubes.
ARTICLE
ASTM A179 vs A213 Specification
Choosing between carbon and alloy heat exchanger tubes.
ARTICLE
Surface Finish for Heat Exchanger Tubes
As-drawn, pickled, and bright-annealed options compared.
ARTICLE
Duplex in Aggressive Exchanger Service
When to specify duplex 2205 over austenitic stainless.
RELATED PRODUCTS
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