In boiler, heat exchanger, superheater, and other high-temperature high-pressure applications, selecting the right steel pipe standard directly impacts equipment safety and service life. ASTM A179, A192, A210, and A213 are the four most commonly used boiler tube standards internationally, but each is designed for different service conditions and performance requirements. This article provides a detailed analysis from material, mechanical properties, and applicable conditions to help you make informed procurement decisions.

I. Core Positioning of the Four Standards

Standard	Full Name	Material Type	Primary Application
ASTM A179 / ASME SA179	Seamless Cold-Drawn Low-Carbon Steel Tubes for Heat Exchangers and Condensers	Low-carbon steel	Heat exchangers, condensers, similar heat transfer equipment
ASTM A192 / ASME SA192	Seamless Carbon Steel Boiler Tubes for High Pressure	Carbon steel	High-pressure boiler water walls, economizers
ASTM A210 / ASME SA210	Seamless Medium-Carbon Steel Boiler and Superheater Tubes	Medium-carbon steel	Boiler systems, superheaters
ASTM A213 / ASME SA213	Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater and Heat-Exchanger Tubes	Alloy steel / stainless steel	High-temperature high-pressure power station boilers, supercritical units

II. Detailed Analysis of Each Standard

1. ASTM A179 / ASME SA179 – Heat Exchanger and Condenser Tubes

ASTM A179 covers seamless cold-drawn low-carbon steel tubes specifically designed for heat exchangers, condensers, and similar heat transfer equipment.

Primary Material: Low-carbon steel (carbon content 0.06%–0.18%)

Key Mechanical Properties:

Tensile Strength: ≥325 MPa

Yield Strength: ≥180 MPa

Elongation: ≥35%

Typical Applications:

Shell-and-tube heat exchangers

Surface condensers

Feedwater heating systems

Heat transfer equipment in petrochemical and refinery plants

Advantages of A179: The low carbon content provides excellent cold bending properties, tube end flaring capability, and good machinability. Due to its low carbon content, weldability is excellent, making it the most economical choice for heat transfer equipment. A179 and A192 are the "workhorses" for low- and medium-pressure boiler service.

2. ASTM A192 / ASME SA192 – High-Pressure Boiler Tube Standard

ASTM A192 covers seamless carbon steel boiler tubes for high-pressure service and is one of the most widely used specifications in power station and industrial boilers.

Primary Material: Carbon steel (carbon content 0.06%–0.18%)

Key Mechanical Properties:

Tensile Strength: ≥325 MPa

Yield Strength: ≥180 MPa

Elongation: ≥35%

Hardness: ≤137 HBW (77 HRB)

Typical Applications:

Water wall tubes

Economizer tubes

Steam generation sections

Low-temperature superheaters

Core Difference between A192 and A179: A192 imposes stricter wall thickness tolerances and is suitable for higher design pressure boiler applications. When design pressure exceeds the limit of A179, A192 is the preferred upgrade. Both have similar chemical composition and strength levels, but A192 has more stringent manufacturing and inspection requirements.

3. ASTM A210 / ASME SA210 – Medium-Carbon Steel Boiler and Superheater Tubes

ASTM A210 covers seamless medium-carbon steel boiler and superheater tubes and provides two strength grades: Grade A1 and Grade C.

Primary Material: Medium-carbon steel

Grade A1: Carbon content approximately 0.27%

Grade C: Carbon content approximately 0.35%

Key Mechanical Properties:

Grade	Tensile Strength	Yield Strength	Hardness
A210 Grade A1	≥415 MPa	≥255 MPa	≤143 HBW
A210 Grade C	≥485 MPa	≥275 MPa	≤179 HBW

Typical Applications:

Boiler system piping

Superheater tubes

High-temperature steam piping

Core Advantage of A210: The medium carbon content provides higher strength and temperature resistance. Grade C offers nearly 50% higher strength than A179/A192, making it suitable for higher temperatures and pressures. However, welding and processing of medium-carbon steel require more careful control. A210 is suitable for boiler and superheater systems with design temperatures of 400°C–450°C.

4. ASTM A213 / ASME SA213 – Alloy Steel and Stainless Steel Tubes

ASTM A213 covers seamless ferritic and austenitic alloy-steel tubes for boiler, superheater, and heat exchanger high-temperature sections.

Primary Materials: Alloy steel / stainless steel

Ferritic alloys: T11, T12, T22, T91, T92, etc.

Austenitic stainless steels: TP304H, TP347H, etc.

Key Mechanical Properties:

Grade	Tensile Strength	Yield Strength	Typical Application
T11 (1.25Cr-0.5Mo)	≥415 MPa	≥170 MPa	Boiler water walls, superheaters
T12 (1Cr-0.5Mo)	≥415 MPa	≥205 MPa	Boiler water walls, economizers
T22 (2.25Cr-1Mo)	≥415 MPa	≥205 MPa	Boilers, refinery high-temperature sections
T91 (9Cr-1Mo-V)	≥585 MPa	≥415 MPa	Supercritical power station boilers

Typical Applications:

Boiler water walls

Economizers

Reheaters

Steam piping

High-temperature refinery equipment

Core Value of A213: The addition of chromium (Cr) and molybdenum (Mo) provides excellent oxidation resistance and creep resistance at elevated temperatures. T22 can operate long-term at 540°C–580°C, while T91/T92 can be used above 600°C for supercritical units. When carbon steels (A179/A192/A210) cannot meet high-temperature creep strength requirements, A213 alloy steels are the inevitable choice.

III. How to Choose – Procurement Decision Guide

Selection by Temperature / Pressure

Service Condition	Recommended Standard	Reason
Low-temperature heat exchangers, condensers	A179	Low carbon, cost-effective, good formability
Medium/high-pressure boilers, economizers	A192	Stricter wall thickness tolerances, suitable for high pressure
High-temperature superheaters (~450°C)	A210 Grade C	Medium carbon, high strength
High-temperature sections (540°C+)	A213 T22	Creep-resistant, oxidation-resistant
Supercritical (600°C+)	A213 T91/T92	Ultra-high strength, extreme heat resistance

Selection by Equipment Type

Equipment Type	Recommended Standard	Size Range
Heat exchangers, condensers	A179	OD 19–76.2mm
High-pressure boiler water walls, economizers	A192	OD 19–177.8mm
Boilers, superheaters	A210 A1/C	OD 19–127mm
Supercritical boiler high-temperature sections	A213 T11/T22/T91	OD 19–127mm

 

Whether you need A179 heat exchanger tubes, A192 high-pressure boiler tubes, A210 medium-carbon superheater tubes, or A213 T11/T22/T91 alloy steel tubes, Sanonpipe delivers High Quality, Fast Delivery, and Zero Risk – one-stop supply solutions for your projects.

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