The final quality of the welded product is influenced by a multitude of factors, therefore congeneric supervision and control of welding processes in the designing, production and research phases are crucial. It is especially important due to the specifics of welding. The process itself prevents the product quality from being evaluated without damaging. In addition, advanced non-destructive techniques do not increase the end results. Quality requirements for metal materials welding processes are established in the PN-EN ISO 3434 norm. Within the system design and implementation we determine what criteria the company is obliged to meet, prepare the necessary documentation and supervise all implementation activities until the desired certificate has been obtained.