Certificates and Approvals

Our extensive experience of maintenance is confirmed by many references and many certificates awarded to STSI Ltd. and its technologists - specialists.

Certificates and approvals:
 
 
  • accreditation for NON-DESTRUCTIVE TESTING OF METALS (WELDED JOINTS – radiographic testing, penetrant testing, magnetic particle testing, ultrasonic testing, visual testing; INDUSTRIAL PRODUCTS – visual testing of pressure and process equipment, ultrasonic wall thickness measurement); SAFETY VALVE TESTING (testing of set pressure and tightness in the range of 0.35 bar to 250 bar and testing of set pressure and tightness on site in the range of 0.35 bar to 300 bar.)
  • accreditation for CALIBRATION OF PRESSURE GAUGES (Bourdon tube pressure gauges, digital pressure gauges with display and pressure transmitters with electrical output) and TEMPERATURE GAUGES (resistance thermometers, thermometers with direct display, thermometers with built-in temperature transmitter) 
  • accreditation for INSPECTION using infrared thermography; inspection of fuel dispensers, scale bars, pressure gauges and cylindrical tanks; Inspection of pressure equipment
  • approval for performing construction activities - group I 
  • NDT control on off-shore facilities (platforms), approvals issued by the Croatian Register of Shipping and Croatian Society of Non-Destructive Testing
  • welding on off-shore facilities according to the regulations of the Croatian Register of Shipping
  • certificate of compliance for 3 workshops for welding operations according to EN 729
  • testing and calibration of safety valves according to the regulations of the Croatian Register of Shipping
  • manufacturing and testing of pressure vessels
  • execution of works on devices, installations and areas in potentially explosive atmospheres ("Ex" products and non-electrical devices, equipment and installations)
  • API threading
  • vibration analysis of rotating machinery
  • authorised service of IMP pumps and Weishaupt burners
  • approval for sale and lease of telecommunication services equipment issued by the Croatian Institute of Telecommunications (Telecommunications Agency)
  • thermovision diagnostics of facilities
  • STSI Ltd. is authorised for inspection, repair and testing as a preparation for verification of legal measuring instruments (length and angle measuring instruments; vertical and horizontal cylindrical tanks; measuring instruments and measuring systems for the measurement of liquids other than water; pressure gauges (manometers, vacuum meters, mano-vacuum meters, pressure transmitters, blood pressure meters, tyre pressure gauges).
    The ID number of authorised STSI service is 397.
  • STSI Ltd. is authorised for regular and exceptional verification of legal measuring instruments. The ID number of the approved body STSI is 23.
  • Based on a certificate issued by an external conformity assessment body according to the requirements of TPED 2010/35/EC and ADR/ RID 2015, STSI Ltd., as an In-house Inspection Service, carries out inspection of LPG gas cylinders for the purpose of periodic inspection of transportable pressure equipment
  • Based on a decision issued by the Ministry of Economy, Entrepreneurship and Crafts (PP-04-2017) of March 2017, STSI Ltd. carries out inspections of low and high hazard pressure equipment.


 STSI Ltd. holds approvals and certificates issued by:
 

 

  • Croatian Accreditation Agency (HAA)
  • Croatian Register of Shipping (CRB)
  • Ex Agency
  • State Office for Metrology (DZM)
  • Ministry of Economy, Entrepreneurship and Crafts
  • Energy & Process Equipment Applied Research Centre (TPK)


 


 

 
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