1300.243.626

Call us now

Premature Failure of 316L Stainless Steel Pipes

chemco-marine.jpg

Premature Failure of 316L Stainless Steel Pipes

Overview

New 316L pipe failed after just two months in operation, causing a total plant shut down.

Quick response by Chemcote restored production without having to fabricate new pipes.

Industry

Power Generation

Date

May 2021

Substrate

Forged 316L SS elbow & pipe section

Products

Internals: Chem-tect™ RB 364

Externals: Basalt fibre composite wrap

Environment

Ambient temperature seawater

Challenge                  

Pitting corrosion in new stainless steel pipes caused holes straight through the steel. Plant unable to operate without these pipes. An immediate and long term solution was required.

Chemcote’s Solution

Pipes were removed from service.

Machine rebates to allow coating application onto flange face preventing crevice corrosion.

Apply low MVT (moisture vapour transmission) rated coating, in this case, a glass flake-filled vinyl ester Chem-tect™ RB 364 up to 1,000µm dry film thickness

Reprofile deep pitting holes using composite repair techniques

Reinforce pitted areas and internal lining with basalt fibre weave matting

Results                

Our corrosion protection solution has already doubled the life of these critical assets and will provide long term protection against seawater environments

Severe pitting stainless pipe
Severe pitting after 2 months
abrasive blasted steel pipe
After abrasive blasting
Internal of pipe rebuilt
Damaged internals rebuilt and coated
chemcote caution
Externally applied caution