The welding is done in welding workshop. We have the highest class of welding machines LINCOLN ELECTRIC POWER WAVE S350 CE and CEBORA SOUND MIG 3840/TS STAR PULSE. Our welders are certified pursuant to AWSd1.1 and EN ISO 9606-1 by the methods of MIG/MAG (meltable electrode in an inert/active gas environment), SMAW (shielded metal arc welding) and TIG (tungsten inert gas welding). The quality of the welding joints is guaranteed by our constant control over the welding process. Our certified European welding engineer (EWE) and our quality control inspectors execute visual testing (VT), ultrasonic testing (UT) and liquid penetrant testing (PT) of the welding joints. When a radiographic testing of the welding joints is needed, the STRIMONA Group uses the services of a certified laboratory for nondestructive testing, Controltest OOD. This is an accredited testing laboratory, type A.