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Training from TWI leads to internationally recognised certification – qualifications required by employers all over the world.

TWI is the world’s largest training organisation in welding, welding inspection and non-destructive testing, and trains more than 20,000 people every year across its global network of offices.

CSWIP - Certification of competence for critical engineering occupations

CSWIP is an internationally recognised mark of competence for people engaged in welding and inspection related jobs in manufacturing, construction, operating or repairing high integrity welded structures, plant or components. CSWIP also certify NDT in accordance with ISO 9712. It is a world leader in its field with over 40,000 certified individuals worldwide.

For up-to-date information/requirements documents, please visit www.cswip.com


TWI runs the British Gas Approved Scheme (BGAS) formerly referred to as 'ERS', on behalf of NATIONAL GRID Plc.

Although it is recommended that candidates receive training, there are no specific training and experience requirements for any of the qualifications.

The system is primarily designed for inspectors involved in one or more of a number of activities related to pipelines. BGAS-CSWIP qualifications are highly regarded pipeline specific qualifications, which complement the well-known CSWIP inspection qualifications, both are internationally recognised.

For up-to-date information/requirements documents, please visit BGAS-CSWIP

PCN - Personnel Certification in Non-Destructive Testing

The PCN scheme, an internationally recognised scheme for the certification competence of NDT personnel, is accredited as meeting the requirements of European Standards ISO/IEC 17024 and ISO 9712. In addition, the aerospace sector examinations meet the requirements of EN 4179.

For up-to-date information/requirements documents, please visit PCN

Health, Safety and Environment Certification Schemes

TWI Pakistan delivers IOSH and NEBOSH.