Curie Temp. of SA335-P91 material
Curie Temp. of SA335-P91 material
(OP)
I have a weld joint of SA335-P91 that is proving difficult to weld due to magnetisim in the pipe. can anyony tell me what the curie temp of this material is?
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Curie Temp. of SA335-P91 material
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Curie Temp. of SA335-P91 materialCurie Temp. of SA335-P91 material(OP)
I have a weld joint of SA335-P91 that is proving difficult to weld due to magnetisim in the pipe. can anyony tell me what the curie temp of this material is?
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RE: Curie Temp. of SA335-P91 material
You need to vary the number of wraps and use DC current. Remember, the objective is to introduce a magnetic field that will cancel out the existing field so that you can weld.
RE: Curie Temp. of SA335-P91 material
RE: Curie Temp. of SA335-P91 material
RE: Curie Temp. of SA335-P91 material
Contact a local NDT lab that does mag partical testing to come out and demag the pipe.
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RE: Curie Temp. of SA335-P91 material
RE: Curie Temp. of SA335-P91 material
I did try this approach with success on 19" OD main steam pipe (3" wall) - have the NDT company use 8 wraps of welders cable over the end of the weld prep, and use as low a current as possible for about 15 minutes.
RE: Curie Temp. of SA335-P91 material