SIGMA, a member of the American Welding Society (AWS), is able to provide all aspects of weld inspection and welder qualifications. Services include the development of welding procedures. Witnessing during welder qualifications and the co-ordination of any mechanical testing.

Both AWS & CSWIP welding inspectors, who are also fully qualified NDT technicians, are available for long term projects and welder qualifications. Full procedures can be run at our Mussafah facility with the addition of third party witnessing through TPI agencies

SIGMA can provide expat personnel for major contracts, British PCN level II & III inspectors for ultrasonic cross-checking or radiographic film reviewer and QA/QC documentation control throughout all aspects of fabrication and construction.

Service Provision

  • Welder Qualification Codes and Training
  • Third Party Witnessing of Welder Qualification and Welding Procedure Qualification
  • Post Weld Heat Treatment
  • Welding Specialists Holding CSWIP, AWS Qualifications
  • Responsible Welding Coordinator (RWC) Services
  • QC Inspection Services (welding/painting)


For over five decades, Sigma has created reliable and strategic partnerships through agreements and joint ventures with some of the leading names in the industry. Sigma helps local content generation based on ‘In-Country Value’ principals. It holds strong importance for long-term partnerships and collaborations to generate value for both partners

Exclusive partners in the UAE for these companies: