Hello,
ASME B31.3 is not having any references clause for HOT welding procedure qualifications.
Yes, the fitting design shall be designed inline to B31.3 for process piping and the field welding of the fitting on the live system shall be done as per API 1104 .
Note : In case of fitting fabrication, let say in barred tee the weld joint between flange and sleeve , the shop welding can be carried out inline to ASME section IX.
On Mon, 24 Feb 2025 at 11:24 AM, ali owead <aliawead1@gmail.com> wrote:
Dear Expertwe have hot tappingfrom process piping b31.3 designto cross country pipeline old pipe i think api 1104 designWPS that need to folow api 1104 or asme b31.3.best regard.--
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