Sir, with all due respect to you, too, you're hopeless.
"paragraph 335.1.1 of ASME B31.3 standard any distortion is PROHIBITED."
"We ORDERED the contractor to cut out these joints..."
"...this procedure is NOT ALLOWED."
And, you are asking for an opinion?? We've been discussing your inablity to control your contractor for the past 2 weeks...Give us all a break. Either stand up or shut up. (not a whole lot of disrespect intended). It is apparent you have taken none of our advice about controlling the contractor, so I, personally, will be responding to no more of your postings. I do not speak for the rest of the experts in this Forum, only myself.