Canadian Energy Regulator Onshore Pipeline Regulations
38 (1) A company shall not perform welding on a liquid-filled pipeline with a carbon equivalent of 0.50% or greater except if it has been demonstrated that no other practical alternative is available.
(2) If a company performs welding referred to in subsection (1), the company shall treat the weld as a temporary installation and replace that installation with a permanent one as soon as is practicable.
(3) Despite subsections (1) and (2) and section 16, if a company intends to perform welding on a liquid-filled pipeline with a carbon equivalent of 0.50% or greater and to treat it as a permanent installation, the company shall submit the welding specifications and procedures and the results of the procedure qualification tests to the Board for approval.
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