OVERVIEW: The pipes were originally coated internally using a glass flake filled vinyl ester more than 22 years ago. Periodic inspection found the internal lining to be in excellent condition, however the externals were regularly exposed to industrial fallout and required additional protection.
INDUSTRY
ENVIRONMENT
Industrial fall out
SUBSTRATE
Iron Body
CHALLENGE
The internal lining applied 22 years ago has outlasted the external paint system where some reliability teams might normally overlook some of the existing corrosion issues as the internals would take priority. Reclassify the external exposure to a C5-1 environment and match the coating specification required to provide extended life
SOLUTION
Composite materials were chosen to rebuild the metal loss. We then applied RB 364, a glass flake filled vinyl ester consolidated with composite reinforcing to areas of the casing that had been damaged by external factors to return it to its original strength.
SCOPE
Onsite water blast, needle gun and mechanical preparation on flange faces and pedestals
Workshop, abrasive blast to Class 3, 60μm profile pipe internals insitu and pipe externals in the workshop
Internals, apply RB 364
Externals, apply RS 500P RA 500M
RL 500 PF to externals
PRODUCTS
Epo-Chem™ RS 500P to externals of immersed areas
Epo-chem™ RA 500M to externals of immersed areas
Epo-Chem™ RC 500GTC topcoat
RELATED CASE STUDIES
Refurbishment of Basket Strainer
After fabrication repairs After abrasive blasting, pitting visible Finished 300 Series Vinyl Ester Internals nearing completion OVERVIEW: Customer required long term corrosion protection for
Duo Chek Valve
Masking and ready for abrasive blasting Application of multiple coats of RB364 internally Holiday testing to ensure coating continuity Coating complete OVERVIEW: Chemcote was
Pipe External Corrosion Protection
Existing corrosion, mech prep after UHPWB Application of spot primer Mid coat applied to affected areas After application of topcoat OVERVIEW: Chemcote was engaged
