SSPC - PA 6
Fiberglass-Reinforced Plastic (FRP) Linings Applied to Bottoms of Carbon Steel Aboveground Storage Tanks
|Publication Date:||1 February 2002|
Procedures outlined below and detailed in subsequent sections of this standard shall be followed for the successful application of a FRP lining system.
Abrasive blast clean the storage tank bottom and, as a minimum, the lower 60 cm (24 in.) of the tank shell. The owner should confirm that this minimum tank shell height is acceptable. Inspect cleaned surfaces just prior to primer or coating application.
If required, apply primer to the storage tank floor and the lower 60 cm (24 in.) of the tank shell.
Apply caulk to the properly prepared tank floor, deep pits, equipment supports, striker (bearing) plates, and chine angle, as required.
Apply resin and glass reinforcement to the tank bottom and lower shell course. If a two-layer or double laminate system is applied, extend the first layer 45 cm (18 in.) up the tank shell and the second 30 cm (12 in.) up the tank shell. At least 15 cm (6 in.) of blasted and primed shell wall shall be visible above the first coat of laminate.
Repair defects in the laminate prior to the application of the topcoat.
Apply a topcoat to the laminate applied to the floor and to the tank shell.
During all phases of the tank lining system application, inspection shall be carried out by the applicator and, when appropriate, by the owner's inspector.
The lining applicator shall record all pertinent information concerning the entire tank bottom lining work within the NACE Coating Inspector's Logbook2 or equivalent. This logbook shall be available at all times to the owner or owner's inspector.
During all phases of the lining operation, the lining applicator shall comply with the owner's prescribed working procedures.
Do not line storage tank nozzles or coat internal tank equipment, piping, or heating coil supports. Terminate the FRP lining at such supports with a design that ensures leak and corrosion resistance of the applied lining.
All applicable safety regulations must be followed during surface preparation, application, and curing of the lining system.
For a listing of documents and standards that shall be used in conjunction with this standard, refer to Appendix A.
The lining manufacturer's technical data sheets for coating materials and glass reinforcement; material safety data sheets (MSDS); and application instructions shall be used in conjunction with the documents listed in Appendix A and the requirements contained within this standard.
Any conflict between documents shall be resolved by the owner.
(2) Some definitions are extracted from Inspection of Coatings and Linings,3 SSPC, 1997, Appendix B - Glossary; Protective Coatings Glossary,4 SSPC 00-07; and NACE Glossary of Corrosion-Related Terms,5 NACE, 2000.