As the first process of production all steel material used in the production is subjected to sandblasting (Sa 2 ½). After mechanical cutting and forming, sandblasted materials are cleaned using special solutions. Parts which are not subjected to welding process are coated (80μm). Parts which will be subjected to welding process are pre-coated (40μm) leaving the necessary surface for welding.
All these processes are completed within 8 hours to prevent corrosion. After welding processes are over, the parts are re-cleaned, heated and pre-coated 80μm again for uniformed coating. The final painting process which is 50μm using acrylic paint. Painted parts dry in an oven at 600C.
Our welding processes are certified with EN 1090-1, EN 1090-2 (EXC3) and TS EN ISO 3834-2. The quality system process starts from the raw material during acceptance of materials and this is maintained by applying extraction, yielding, elongation and chemical analysis tests conducted at E-MAK Quality Laboratories according to EN 10025 standards.
All applied welding techniques are approved by WPQR’s issued according to EN ISO 15614-1 standard as a result of tests made by an accredited institute. Our welding engineers prepare WPS’s according to EN ISO15609 standard. Beside all of these to insure the system, our all welders have certifications according to EN ISO 9606-1 standard from an accredited institute.
All pieces to be weld are applied to joint preparation process according to EN ISO 9692 standards. Surfaces subject to welding process are carefully cleaned from grease, rust, paints and so on.
Cleaned pieces are exposed to pre-cementation process according to EN ISO 13916 and EN 1011-2. Welding wires are selected carefully and tested according to EN 13479 standards. Welding processes are controlled before, during and after each welding by control technicians and monitored by welding engineers. After each welding a stress relief process is applied according to EN ISO 17663 standard.
Each welding process is approved after an eye control according to EN ISO 17637, penetration inspection according to EN ISO 3452-1, magnetic piece inspection according to EN 17638 and ultrasonic inspection according to EN ISO 17640 standards are applied. It is not allowed for any piece to move to the next process step without the approval of the welding engineer.