Project name
Transco
Location
West Midlands
Country
UK
Client
Transco
Market area
Utilities

 

Requirement
Despite the well insulated and aluminium clad section of the PRS pipeline, significant corrosion was detected on the outer surface of the inner pipe. This was caused by surface condensation due to low gas temperatures and humid conditions in a highly aggressive environment. The above-ground steel gas pipe required coating to prevent further corrosion of the pipe, valves and flange bolts, while remaining in service. An expected life of 10 years before first maintenance was also required. The Corroless system was recommended to meet these requirements.
Surface Preparation
The pipes were hydrojetted and manually prepared to St2 standard of EN ISO 8501-1:2007 and then hydrojetted again to remove any further dust and contamination.
Coatings
Patch priming with Corroless EPF was followed by two full coats of Corroless EPF.
Product (per coat) DFT (per coat) Colour
Corroless EPF 200 microns Buff
Corroless EPF 200 microns Black

Comments
This work was inspected 11 years later and found to be in very good condition, with no further inspection intended for a further 4-5 years. The previous system had lasted for only 7 years.