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Recognised Third Party Organisation (RTPO)

TWI Certification Ltd is a Recognised Third Party Organisation (RTPO) for the approval of operators, procedures and NDT inspectors for permanent joints in accordance with the Pressure Equipment Directive, (2014/68/EU). CSWIP certification enables welders, brazers and NDT inspectors to comply with the PED (2014/68/EU).

The Pressure Equipment Directive (PED) (2014/68/EU) applies to the design, manufacture and conformity assessment of stationary pressure equipment with a maximum allowable pressure greater than 0,5 bar. The directive entered into force on 20 July 2016. 

The Pressure Equipment Directive aims to guarantee free movement of the products in its scope while ensuring a high level of safety.” 

As the RTPO, TWI Certification Ltd carries overall responsibility for ensuring that the requirements for competence of permanent joining personnel are satisfied and that appropriate approval documentation is issued on the basis of successful evaluation.

There are two different routes to approval, details of which can be found within the Scheme documents below.

Requirements for the Qualification of Welding Procedures and Welders and Brazing Procedures and Brazers

CSWIP-PED-1-99, 5th Edition, April 2014

Requirements for the approval of NDT Personnel

CSWIP-PED-2-01, 2nd Edition, January 2011

It is the manufacturer’s responsibility to choose the appropriate route and to ensure that the recognition and acceptance of approval documentation is appropriate to their requirements. Whilst TWI Certification Ltd makes every effort to ensure that its approval documentation carries appropriate accreditation, and that evaluation and certification activities are carried out in accordance with best practice, it cannot guarantee acceptance by any particular customer or client.

Please note that should the UK leave the European Union on 31 October 2019, TWI Certification Ltd will no longer be able to act as an RTPO under the European Pressure Equipment Directive but will continue to provide certification in full compliance with UK law. For further information or clarification please see the European Commission website.