Certificates and Approvals

Years-long experience in maintenance has been confirmed by many references and many certificates awarded to STSI Ltd. and its technologists - specialists.

Certificates and approvals:
  • Accreditation for nondestructive testing of metal materials
  • approval for construction works – group I
  • NDT control on off-shore facilities, approvals by the Croatian Register o Shipping and Croatian Society of Non-destructive Testing,
  • welding on off shore facilities in line with regulations of the Croatian Register of Shipping
  • welding on steel structures according to EN 729,
  • testing and calibration of safety valves according to regulations of the Croatian Register of Shipping,
  • manufacturing and testing pressure vessels,
  • carrying out of work on devices and installations in areas with potentially explosive atmospheres (“Ex” products and non-electric devices ,equipment and installations),
  • API threading,
  • vibration diagnostic analysis on rotating equipment,
  • authorised servicing of IMP pumps and Weishaupt burners,
  • approvals for sale and lease of telecommunication services equipment issued by the Croatian Institute of Telecommunications.
  • thermovision diagnostics of plants
  • STSI is authorised for inspection, repair and testing as a preparation for attestation of fuel dispensers for motor vehicles. The number of authorized STSI service is 397.
  • STSI is authorised for inspection, repair and testing as a preparation for attestation of volume indicators. The number of authorized STSI service is 398.
 
Accreditation for nondestructive
testing of metal materials


Accreditation for testing of
safety valves, armatures,
pressure vessels and pipelines.


Accreditaiotn for calibration of pressure
gauges and temperature gauges



STSI Ltd. employs 14 European Welding Engineers (EWE) and 4 European Welding Technicians (EWT), certified to conduct, control and supervise welding works and their certificate is recognized throughout the world.


NDT control on off-shore facilities (platforms), approvals by the Croatian Register of Shipping and Croatian Society of Non-destructive Testing. Welding on off-shore facilities, approvals by the Croatian Register of Shipping. Testing and calibration of safety valves in line with regulations of the Croatian Register of Shipping.

TUV Product Certification

Approval for construction works – group I


In 2004 American Bureau of Shipping (ABS) granted another certificate to STSI Ltd.-regarding implementation of hull gauging, measuring girths of walls on objects at sea.


Approval for inspection, repair and testing as a preparation for attestation of fuel dispensers for motor vehicles. The number of authorised STSI service is 397.


Approval for inspection, repair and testing as a preparation for attestation of volume indicators. The number of authorised STSI service is 398.


Certificate welding on off-shore facilities, approval issued by the Croatian Register of Shipping