Welding and soldering

Welding & soldering in practice

Welding is a material-locking and undetachable process and the product can transmit tensile and compressive forces or be a seal between two media. It is not only necessary to heat both base materials up to the melt and then let them cool down again. In order to achieve professional welding, there are standards for welders and specialist companies that regulate qualification. GWP can support the customer with an accredited laboratory and a certified expert in the implementation and qualification; process and welder certificates are also offered.

Qualification and optimization

In order to be able to assess the quality of a weld seam, it is necessary to take a holistic view of the welded joint and the welding process to be applied. Including the selection of the welding method, the heat conduction, the welding sequence, the layer structure, the welding parameters depending on the base materials and the external conditions.

Most problems do not occur in the weld metal but in the heat-affected zone of the base metal. GWP supports its customers in the preparation of welding instructions and the qualification of these instructions, as well as in the training of welding personnel and helps to optimize processes.

Repair welding

Due to the changed mode of operation of the fossil power plants, the thick-walled components are subjected to a higher LCF load and cracking occurs. In most cases, the components have already had more than 100 starts and well over 100,000Bh behind them. For repair welding, the process therefore begins with a damage investigation and also a creep damage investigation. GWP can do this for its customers and then develop a repair concept and accompany its implementation on site.

Standards

EN ISO 3834, CEN ISO/TR 15608, EN ISO 9606, EN ISO 15609, EN ISO 15607, EN ISO 15610, EN ISO 15611, EN ISO 15612, EN ISO 15613, EN ISO 15614, EN ISO 14732, EN ISO9712, EN ISO14731, EN ISO13916, EN ISO17635, EN ISO 17637, EN 1435, EN ISO 17640, EN ISO 17638, EN 1321, EN ISO 5817, EN ISO 10042, EN ISO 13919, EN ISO 9692, EN ISO 2560, EN ISO 14341, EN ISO 636, EN ISO14171, EN ISO 14174, EN ISO 17632, EN 12536, EN ISO 18275, EN ISO 16834, EN ISO 26304, EN ISO 18276, EN ISO 3580, EN ISO 21952, EN ISO 24598, EN ISO 14634, EN ISO 3581, EN ISO 14343, EN ISO 17633, EN ISO 14172, EN ISO 18274, EN ISO 12153, EN ISO 24373, EN ISO 1071, EN ISO 9016, EN ISO 5178, EN ISO 4136, EN ISO 9018, EN ISO 5173, EN ISO 9017, EN ISO 9015, EN ISO 17639, EN ISO 17641, EN ISO 17642, EN ISO17655