What is the difference between carbon steel pipes ASTM A53 and A106 pipes? To answer this question, we need first to recap what these standards are all about:

ASTM A106: covers seamless carbon steel pipes for high pressure applications (and for temperatures up to 750 degrees F). Grades:A106Gr.A carbon steel pipes, A106Gr.B, A106Gr.C seamless pipes. ASTM A53 (A53Gr.A and A53Gr.B pipes): covers black and hot dip galvanized carbon steel pipes for low / medium pressure and mechanical application.

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Carbon Steel ASTM A53 Pipe vs A106 Pipe - Scope

ASTM A53 is Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless.  ASTM A106 is Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service.

Carbon Steel A53 Pipe vs A106 Pipe - Applied Type of Pipe

A 53 can be welded seam or seamless depending on how it is specificed for purchase. It is a general steel pipe spec and covers galvanized pipe as well as black pipe. A106 is a similar pipe in chemical composition but is intened for high temperature service (up to 750 Degs F). It is a seamless pipe. At least in the US, there is usually A53 for welded pipe while A106 is seamless. If you ask for A53 in the US they will quote A106 as an alternate.

Carbon Steel A53 Pipe vs A106 Pipe - Chemical Composition

For example when we compare between A106-B and A53-B seamless from chemical composition point of view, we find that : 1. A106-B contains silicon, min. 0.10% where A53-B has zero%, and silicon is the important element for improving the heat resistance criteria. 2. A106-B contains manganese 0.29-1.06%, where A53-B 1.2%. 3. A106-B contains low sulfur and phosphorus, max. 0.035% where A53-B contains 0.05 and 0.045% respectively.

Carbon Steel A53 Pipe vs A106 Pipe - Mechanical Properties

ASTM A53 Grade A Grade B Grade C carbon steel pipes tenside strength, min, psi (MPa) 48000(330) 60000(415)

Yield strength, min, psi (MPa) 30000(205) 35000(240)

ASTM A106 Seamless Pipes Tenside strength, min, psi (MPa) 48000(330) 60000(415) 70000(485)

Yield strength, min, psi (MPa) 30000(205) 35000(240) 40000(275)

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BBN Steel
Measurement unit (ANSI): 
Metric Ton

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