Calculating Gas Flow Rate for a Hot Tap
Calculating Gas Flow Rate for a Hot Tap
(OP)
Help, please.
Where can I find information on how to calculate the gas flow rate required through a main carrier pipe in order to weld a split full encirclement saddle on the line? This is necessary to permit the welding root pass to the outer pipe while providing enough heat transfer to keep the weld from "burning through".
I appreciate any responses. PCS1034
Where can I find information on how to calculate the gas flow rate required through a main carrier pipe in order to weld a split full encirclement saddle on the line? This is necessary to permit the welding root pass to the outer pipe while providing enough heat transfer to keep the weld from "burning through".
I appreciate any responses. PCS1034





RE: Calculating Gas Flow Rate for a Hot Tap
You might find something at the following link:
http://www.tdwilliamson.com
I have a proprietary welding procedure specification; however, I am not authorized to share it. The specification is based on a 1994 Edison Welding Institute Report. The information given in the specification gives a method to determine the acceptable envelope of heat input based on the carbon equivalency, pipe thickness, and a field test cooling rate. Note that the cooling rate is not calculated; but instead, field tested with the flow. Even if you come up with a calculation method, it would be prudent to find a copy of the 1994 EWI Report to confirm that you don’t have excessive HAZ hardness burn-through.
RE: Calculating Gas Flow Rate for a Hot Tap
RE: Calculating Gas Flow Rate for a Hot Tap
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/