Internal coatings are primarily to reduce pressure drop of the fluid flowing through the pipe.
This system is designed to apply a suitable spray coating, primer, or epoxy to the abrasively cleaned internal surface of the pipe. This equipment is recommended for API, NAPCA, NACE, and most other international coating specifications similar to the A/M coating specifications.
After pipe has been abrasively cleaned and all residual dust and grit have been removed, the pipe is transferred to the pipe turning roller unit. The turning roller unit rotates the pipe as the spray boom is inserted into the pipe until the spray head is located outside the opposite end of the pipe. As the boom is reversed, the spraying process starts. The turning roller continues to rotate the pipe until the spraying process is complete. All liquid epoxy spray equipment, such as pumps, tanks, hoses and electric drives, are mounted on the spray boom carriage.
The boom carriage is moved on track rails capable of traversing the full length of pipe. There are two adjustable collector carriages c/w extraction fans to extract the hazardous fumes that are emitted during the spraying process. The hazardous fumes are ventilated out of the building via ducting suitable to take away from the work area.
A typical system consists of the following:
- Powered Boom Carriage with Paint Preparation Equipment
- Internal Boom Spray Head
- Paint Reclaim Collector Carriages
- Hydraulic Power Unit
- Control Console
Internal Coating Systems
Internal Surface Cleaning
The internal blast cleaning system is designed to clean the internal pipe surface with steel shot, grit or a combination of both, in preparation for coating. Degree of cleanliness is controlled by the speed of pipe transferred through the surface preparation system. Method of cleaning can be accomplished with either compressed air blast nozzles or by high powered mechanical wheel blasting.
Internal FBE Coating
This system is designed to apply a suitable Fusion Bonded Epoxy coating on the internal pipe surface, per API or AWWA coating specifications. Typically used for protection against transportation of corrosive liquids or sour gases.
Internal Liquid Epoxy Spray Coating
This system is designed to apply a suitable spray coating, primer or epoxy to the abrasively cleaned internal surface of the pipe. This equipment is recommended for AWWA, API, NAPCA, NACE and most other international coating specifications similar to the a/m coating specifications. This coating system is typically used to reduce flow friction of gas pipelines.
Internal Cement Mortar Lining Coating
This system is designed to apply a suitable Cement Mortar Lining (CML) on the internal pipe surface, per AWWA coating specifications. Typically used for transportation of water or sewage.