Heat Exchanger Tube Material

If you are manufacturer you should have access to the standard or make it available in case there is a question.

Available from ASTM.ORG

http://www.astm.org/Standards/A179.htm

http://www.astm.org/Standards/A106.htm

also note possible differences between ASME and ASTM

http://www.amerpipe.com/products/seamless-carbon-pipe/a106-grade-b

Rakesh....

You must first understand the nature of ASTM standards and the differences between pipe and tube.

SA 179 refers to a specification for carbon steel TUBING.. SA 106 Gr B refers to a commonly used specification for carbon steel PIPING. Piping is not the same as tubing.

http://www.engineeringtoolbox.com/pipes-tubes-d_347.html

Thank you for your reply, I know that SA 179 is cold drawn tubes and SA 106 is Hot finished pipes.

I can use either pipe or Tube if the thickness with stands for design Temperature .its only distributing Heat Transfer area in to pipe Length.

But every where SA 179 tubes are used for Heat exchanger. Is there any specific reason. We use SA 179 and recently we have received few offers from vendor and every one using SA 179.

Is there any Technical reason behind the selection of SA 179.

Regards,

Rakesh Reddy

What size do you require? AFAIK, SA106 is not available in tube sizes.

You do not state the diameter of the tubes, so I am assuming you are talking about 3/4" to say 1.5" OD tubes. Without looking up the specific tolerances in the respective ASTM/ASME standards, I say the tolerances for the SA106 pipe would not work for the tubesheet drilling and tube groove expansion into the tubesheet holes. I am sure the SA179 tolerances are much tighter which allows the tubesheet holes to be drilled to a much closer size to the Nominal Tube OD.