Accreditations and authorisations

The Welding Institute is accredited by Slovenian Accreditation for testing (LP-003), certification of personnel (CO-003) and certification of products, processes and services (CP-011). It is also EU notified body no. 2042 (NB 2042) for pressure equipment.

NumberFieldStandardScope
LP-003testingSIST EN ISO/IEC 17025laboratory for destructive testing and testing of welded joints; laboratory for non-destructive testing of welded joints (NDT)
CO-003certification of personnelSIST EN ISO/IEC 17024certification body: certification of welders and welding operators, certification of NDT personnel
CP-011certification of products, processes and servicesSIST EN ISO/IEC 17065certification body: welding procedures (WPQR), pressure equipment (PED), quality system in fusion welding (ISO 3834), assessment and verification of constancy of performance of construction products (FPC)
NB 2042EU notified bodyDirective 2014/68/EU (PED)conformity assessment and certification of pressure equipment
Annexes to the accreditation certificates are on the website of Slovenian Accreditation.

Annexes to the accreditation certificates on the website of Slovenian Accreditation. Flexible scope of the CP-011 accreditation: list of standards of the certification body (PDF, 10 November 2025).

What authorisations does the Institute have besides the accreditations?

  • EU notified body (NB 2042) for pressure equipment,
  • authorisations from the IIW (International Institute of Welding) and the EWF (European Welding Federation) for the education of welding coordinators through SDVT,
  • IAB, IIW and EWF through the Slovenian Welding Society (SDVT).

What does accreditation mean for you?

Accreditation means that Slovenian Accreditation has independently verified the competence of our laboratory and certification body against international standards. You can therefore use our certificates and reports as evidence with clients abroad too. When referring to a certified activity, follow the rules for using the VARcert mark (PDF, Slovenian).

Frequently asked questions

What does LP-003 mean?

The accreditation number for testing to SIST EN ISO/IEC 17025 from Slovenian Accreditation.

What does CO-003 mean?

The accreditation number for certification of personnel to SIST EN ISO/IEC 17024.

What does CP-011 mean?

The accreditation number for certification of products, processes and services to SIST EN ISO/IEC 17065.

What is NB 2042?

The identification number of the EU notified body for pressure equipment (Directive 2014/68/EU, PED) held by the Welding Institute.

Where can I check the scope of accreditation?

On the website of Slovenian Accreditation, where the annexes to the accreditation certificates are published.

Who issues the IWE, IWT or IWS diploma?

The SDVT on behalf of the IIW; the programme is run by the Institute as an authorised education body.

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