ASME SA 213 is a material specification specifically used for manufacturing core tubing in high-pressure and high-temperature equipment such as boilers, superheaters, and heat exchangers.
When procuring high-temperature tubing for boilers, superheaters, or heat exchangers, ASME SA 213 is one of the most commonly specified material standards. However, many buyers and engineers still confuse it with ASTM A213, or misunderstand what "SA213 material" actually means.
Characteristics of ASME SA 213
| Feature | Description |
| Form | Seamless tubes (not pipes) - ordered by outside diameter and minimum wall thickness rather than nominal pipe size (NPS) and schedule number |
| Material Types | Two main families: • Ferritic alloy steels (primarily chromium-molybdenum grades like T2, T5, T9, T11, T12, T22, T91, T92) • Austenitic stainless steels (grades designated with "TP" like TP304, TP304L, TP316, TP316L) |
| Special Grades | "H" grades (e.g., T91H, TP347H) have enhanced creep-rupture strength for higher temperature service |
| Applications | Specifically designed for heat transfer applications in power generation (boilers, superheaters, reheaters), petrochemical, and process industries requiring resistance to high temperatures and corrosion |
What Type of Material is SA213?
ASME SA213 does not refer to a single material grade, but rather a "family of specifications" covering multiple alloy systems:
Ferritic Alloy Steel Grades (T-Series)
Typical grades:
- T2, T5, T9
- T11, T12, T22
- T91, T92 (high creep strength)
Main characteristics:
- Excellent high-temperature strength
- Good creep resistance
- Widely used in power plant applications
Austenitic Stainless Steel Grades (TP-Series)
Typical grades:
- TP304 / TP304L
- TP316 / TP316L / TP316Ti
- TP321 / TP347
Main characteristics:
- Excellent corrosion resistance
- Good oxidation resistance
- Stable performance in chemical media environments
These grades are widely used in petrochemical industries and heat exchanger systems.
Where is ASME SA213 Material Used?
SA213 tubing is designed to withstand extreme service conditions, with applications including:
- Industrial boilers
- Superheater tubes
- Heat exchangers
- Power generation systems
- Oil and gas refineries
Thanks to its seamless structure and specific alloy composition, this material can withstand:
- High pressure
- High temperatures
- Long-term thermal stress
SA213 vs ASTM A213: What’s the Difference?
This is a common question in procurement.
| Standard | Organization | Application |
| ASTM A213 | ASTM | General industrial use |
| ASME SA213 | ASME | Pressure vessels & boilers |
Manufacturing and Quality Requirements
From a production perspective, SA213 tubes must meet stringent standards:
- Manufacturing process
- Seamless (cold drawn or hot finished)
- Controlled heat treatment (solution annealing / normalizing)
Mechanical Testing
- Tensile test
- Hardness test
- Flattening test
- Hydrostatic test or non-destructive testing (NDT)
Chemical Composition Control
The alloying elements (Cr, Mo, Ni, etc.) of each grade are strictly controlled to ensure:
- Creep resistance
- Corrosion resistance
- Structural stability
Why Choose SA213 Tubing
Based on practical project experience, SA213 materials are widely selected because they offer the following advantages:
- Long service life under thermal cycling conditions
- Reliable performance in pressure systems
- A wide range of grades suitable for different environmental conditions
- Good compatibility with ASME-certified equipment