Heating element butt welding
Preparatory work for welding
The welding area is to be protected from unfavourable climatic influences (e.g. moisture and temperatures below +5 °C).
The following measures may help to achieve this:·
- preheating,
- covering under canvas
- heating
In order to prevent stresses due to differing temperatures such as the influence of the sun, temperature equalisation should be achieved by covering the region of the welding seams on time.