What is the difference between A106 and A53?

A106 is a seamless pressure-service pipe specification for high-temperature use, while A53 covers both welded and seamless pipe for more general service.

Is ERW pipe covered by A53?

Yes — A53 Type E designates electric resistance welded pipe.

Material specification

ASTM A106 / ASTM A53

Carbon Steel Pipe for Pressure and General Service

ASTM A106 covers seamless carbon steel pipe for high-temperature service; ASTM A53 covers welded and seamless pipe for general and mechanical service, including galvanised pipe.

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Scope

What it covers

A106 Grades A, B and C — seamless pipe for pressure service.
A53 Type E (electric resistance welded), Type S (seamless), Grades A and B.
Both are dimensioned per ASME B36.10M.

Practical notes

Points to specify

A106 is generally specified where elevated-temperature pressure service is involved.
A53 Type E covers ERW pipe used widely for structural, water, and general service lines.

Products quoted against ASTM A106 / ASTM A53

MS ERW Pipes

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FAQ

Common questions about ASTM A106 / ASTM A53

What is the difference between A106 and A53?: A106 is a seamless pressure-service pipe specification for high-temperature use, while A53 covers both welded and seamless pipe for more general service.
Is ERW pipe covered by A53?: Yes — A53 Type E designates electric resistance welded pipe.

More references

ASME B16.5

Pipe Flanges and Flanged Fittings (NPS 1/2 through NPS 24)

ASME B16.9

Factory-Made Wrought Buttwelding Fittings

ASME B16.11

Forged Fittings, Socket-Welding and Threaded

General guidance only. Work from the current published edition of the standard and your project specification; sizes, grades, classes and documentation are confirmed per enquiry.