A repair was required to reinforce this pipe without shutting down the plant and dismantling the pipework.
Following NDT testing of a digestor feedpipe, it was found that internal corrosion has caused the pipe wall thickness to approach the minimum allowance. Welding was not an option in this environment and the plant was keen to keep this tank running as the majority of the plant’s operation depended on it.
The area was prepared to SSPC SP11 using a mechanical abrasion cleaning process. Belzona 1982 was applied along with a composite reinforcing sheet. A wrap system was applied to the feedpipe along with a patch system terminating onto the tank. Bracket bolts were patched around. The repair was then consolidated. The repair was done on a ‘standard’ Belzona SuperWrap II basis.
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