13.1.4 Each welder or welding operator shall be allocated a unique identification number or symbol. On completion of a weld, each welder or welding operator shall mark the weld with this number or symbol using a method that is non-injurious to the material. This marking shall be maintained until all inspection and documentation is complete.
13.1.5 The Contractor shall ensure that an adequate quality control system exists to record the complete history of each weld, including WPS(s) used, welder or welding operator, and results of all NDE and production tests. This system shall ensure that any repair and rectification work, including design changes, is recorded and that all necessary NDE and production tests have been performed. Owner reserves right to perform periodic audits of Contractor to ensure proper functioning of the quality control system.
13.1.6 All tack welds or bridge welds shall be performed by qualified welders or welding operators, using a qualified WPS, meeting the requirements of this Engineering Standard.
13.1.7 Tack welds shall be removed or ground to a profile suitable for fusing into the finished weld. Other temporary welds shall be removed bycutting or grinding and ground smooth with the metal surface and the area subject to 100%MT/PT.