Training of NDT personnel

We run courses for NDT personnel as an authorised training centre of the certification body VARcert. After successfully passing the exam for a method, the candidate receives an internationally recognised VARcert certificate to SIST EN ISO 9712, a certificate for the PED field under Directive 2014/68/EU and a pocket ID card.

Visual testing (VT)

Visual testing finds the largest share of defects in products, which is why these courses are the most popular.

Penetrant testing (PT)

An inexpensive and simple method for detecting surface discontinuities.

Magnetic particle testing (MT)

For inspecting the surfaces of ferromagnetic materials.

Ultrasonic testing (UT)

Ultrasound is used to find volumetric discontinuities, mainly in metallic materials.

Ultrasonic thickness measurement (UTT)

Ultrasonic thickness measurement allows wear and corrosion to be monitored in process systems.

Radiographic testing (RT)

Radiography is used to find discontinuities inside various industrial materials.

What is the route to an NDT certificate?

Training. complete the training for the method and sector at a recognised institution. We deliver some courses with part of the theory by distance learning through e-materials.
Industrial experience and vision. you need sufficient experience for the method and sector and a certificate of satisfactory near vision and colour recognition.
Exam. general, specific and practical exam; for level 2 also a written instruction.
Certificate. after you pass the exam, VARcert issues a certificate for the method, level and sector.

When is the next NDT course?

Announced dates and the 2026 plan are on the page Course dates and exams. By prior arrangement we can also organise training for other NDT methods in Serbian or English; the VT 1+2 course in English is available by arrangement.

Methods	visual (VT), penetrant (PT), magnetic particle (MT), ultrasonic (UT), ultrasonic thickness measurement (UTT), radiographic (RT) and film interpretation (RT-FI)
Levels	1, 2 and 3
Place	Ljubljana and Maribor, on request also at the client’s site
Language	Slovenian; training in English or Serbian can be organised by arrangement (VT 1+2 in English by arrangement)
Standard	SIST EN ISO 9712; syllabi in line with ISO/TS 25107
Certificate	VARcert, valid for up to 5 years; an additional certificate for PED; pocket ID card
Renewal	after 5 years from the exam; apply in the last six months of validity
Vision test	required once a year; you can take it with us
Dates	course dates and the 2026 plan (Slovenian)

Apply for an NDT course

Applying is free of charge and does not mean payment.

Course and exam application

Send an enquiry

Contact for NDT training

Rebeka TopolnikNDT personnel training, recertification, exam information+386 41 365 942 rebeka.topolnik@i-var.si
Mojca Radmaneducation coordinator, NDT certification+386 1 28 09 402 mojca.radman@i-var.si

Frequently asked questions

Who provides the NDT training?

The Welding Institute is an authorised training centre of the certification body VARcert. We have been educating NDT personnel since 2005.

How long is an NDT certificate valid?

Up to 5 years. Renewal takes place after 5 years from the exam; you apply in the last six months of the certificate’s validity.

Can I take the vision test with you?

Yes. Prior booking is required with mojca.radman@i-var.si (Ljubljana) or branko.kralj@i-var.si (Maribor).

Can I borrow UT equipment for training or an exam?

Yes, candidates can borrow UT equipment from us. The price is EUR 150 per day.

What if I do not pass the exam?

You can repeat individual parts of the exam twice; re-sits are chargeable (the price list is on the page NDT personnel certification).

Do you also train for pressure equipment (PED)?

Yes. For the PED field you need at least 60 days of work experience in that field and additional training (up to 4 hours). The PED certificate complements, but does not replace, the ISO 9712 certificate.

Last updated: 2 November 2026