Alfa Laval COR, Инструкция по эксплуатации

Страница: 8 / 12

4 Operation
Study the instructions carefully and pay special attention to the warnings!
4.4 Welding
1. The weld between frame of the manway door/manhole cover and the tank must be preceded by an accurate preparation
of the edges to be welded, and by a perfect adaptation.
2. Welding work, perforation, folding, cutting or similar must not be performed on the manway door/manhole cover, if such
actions are not absolutely necessary for the installation of the manway door/manhole cover.
3. Avoid an excessive stretching of the material.
4. Before welding the frame of the manway door/manhole cover onto the tank, carefully prepare the surfaces and edges to be
welded cleaning them with a degreasing agent and dry with a clean cloth. Carefully position the manway door against the
frame to ensure cohesion.
5. During welding, close the cover on the frame using a spacer in place of the gasket in order to reduce the expansion of the
frame in respect of the cover as much as possible, to maintain the form and the original dimensions of the cover and to
assure a perfect joining with the cover itself.
6. To protect the gasket remove the gasket during the welding phase.
7. After welding always control that the sealing is in full contact with the sealing surface.
8