Sinopec International Petroleum Service (Thailand) Co. Ltd (Sinopec) is the contractor for a 42-inch Pipeline in Thailand. Sinopec applied automatic GMAW and semi-automatic FCAW processes to weld the circumferential seam welds between line pipes. The weldments were required to comply with the welding requirements of API 1104 and sour service hardness requirements of ISO 15156-1. Figure 1 shows an area of pipeline welded with automatic GMAW process.
Chen Welding Integrity (CWI) Services was engaged by the Sinopec as an independent expert to carry out a welding compliance surveillance to ensure the welding comply with the requirements of project specification, qualification and construction codes, welding procedure and welding practices. The compliance surveillance from Sinopec was followed by a series of technical support provided to Sinopec by their certified international welding engineer (CertIWE).
The details of the case study can be viewed from the link as follows: Case Study 005: Gas transmission pipeline welding compliance surveillance
