Differences Between A53 and A106 Pipes

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A53 and A106 pipes are 2 popular choices for most steel pipes markets. They have similar appearance, and there are differences inside of them which need to be noticed carefully. when looking for steel pipes for some specific projects and applications. In the following article, we will explore the key differences between A53 and A106 pipes, specifications, manufacturing processes, and intended uses.

Specifications of A53 and A106 Pipes

A53 and A106 pipes are both carbon steel pipes, but they are designed to meet different specifications.

astm a106 seamless pipe

A53 pipe is mostly seen at some welding, threading, and flanging mechanical and pressure applications. Usually, 3 steel grades are appropriate for A53 pipes respectively are Grade A, Grade B, and Grade C. Steel grade determines the minimum yield strength (in psi) of the steel pipes. Low-pressure plumbing, water transport, and fire protection systems are major applications of A53 pipes.

Procedure ERW, SMLS
Dimensions 10.3mm – 660.4mm
1/8″ – 26″
DN6 – DN650
Thickness 1.65mm – 25.4mm
Steel Grade ASTM A53 GRA
Surface Coating Varnishing, Oiling, Hot Dip Galvanizing
FBE, 2PP, 3PP, 2PE, 3PE
End Type Square cut, Plain, Bevelled, Threaded, Grooved
Joint Method Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Pipe Machining Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

A106 pipe is widely used for working environments with high temperature. The applications usually have more operations of bending, flanging, and forming. Stringent chemical composition and mechanical property requirements make A106 pipe a better choice for high temperature and pressure conditions.

Procedure SMLS
Dimensions O.D.: 33.4 mm – 610 mm
NPS: 1″ – 24″
DN: 6 to 600
Thickness 1.65mm – 25.4mm
SCH10, SCH20, SCH30, SCH40 to SCH160
Steel Grade Grade A, Grade B, Grade C
Surface Coating Black, Red, Primer, Hot Dip Galvanizing, FBE coating
End Type Square cut, Bevelled, Grooved
Joint Method Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Pipe Packing In bundles, Plastic wrap

Different Manufacturing Processes

A53 and A106 pipes are made from steel pipe manufacturing processes.

Both seamless and welded manufacturing are able to produce A53 pipe. Seamless A53 pipe is made by heating a solid billet or ingot and then rolling it to adjust to specific diameter and wall thickness. Welded A53 pipe is made by bending and welding strips of steel together.

A106 pipe is only available in seamless form which is made by heating a solid billet and then stretching it to specific length without the use of any welded joints. This seamless manufacturing process brings a more uniform, stronger, and highly reliable pipe for high-temperature applications.

Various Application Scenarios

Applicable scenarios of A53 and A106 pipes covers many kinds of industrial fields.

A53 pipe has advantages of low cost and versatility. So, people usually use A53 pipe for general plumbing, piping systems for gas & air as well as liquid transportation.

A106 pipe is specifically designed for high-temperature and high-pressure applications. So, power plants, refineries, boilers, and pipelines where generates temperatures and pressures.

Finally, It is important to consider these above different factors of A53 and A106 pipes when purchasing the appropriate pipe for your projects.

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