Process for coating the interior surfaces of pipes made of nonmetal materials

A method for preparing inside walls of a pipe made of a nonmetal material selected from at least one of plastics, PVC (polyvinyl chloride), composite materials, or polybutylene with fittings selected from at least one of nonmetal, metal, or combinations thereof, for cleaning, coating and sealing and repair, comprising the steps of:

• (a) drying and cleaning, with dry abrasive particles, the inside walls of the pipe made of the nonmetal material wherein the drying and cleaning step further includes the step of:
• simultaneously pulling substantially moisture free and substantially oil free heated compressed air by a vacuum;
• and
• (b) coating and sealing the inside walls of the pipe made of the nonmetal material in a single sealant stage with a single leak sealant coating layer while maintaining a positive pressure in the pipe made of the nonmetal material during the single sealant stage.

A method for preparing and repairing inside walls of a pipe made of a nonmetal material selected from at least one of plastics, PVC (polyvinyl chloride), composite materials, or polybutylene, with fittings selected from at least one of metal fittings, nonmetal fittings or combinations thereof, the method comprising the steps of:

• (a) drying and cleaning, with dry abrasive particles, the inside walls of the pipe made of the nonmetal material, wherein the drying and cleaning step further includes the step of:
• simultaneously filtering substantially moisture free and substantially oil free heated compressed air passing through a vacuum;
• and
• (b) coating and repairing the inside walls of the pipe made of the nonmetal material with a leak sealant pumped into the pipe made of the nonmetal material at a continuous positive pressure by sealing the interior walls of the pipe made of the nonmetal material with a single layer of the leak sealant in a single sealant stage.

A method for internally sealing leaks in a pipe made of a nonmetal material selected from at least one of plastics, PVC (polyvinyl chloride), composite materials, or polybutylene, with fittings selected from as least one of nonmetal fittings, metal fittings or combinations thereof, comprising the steps of:

• drying and cleaning inside walls of a pipe made of the nonmetal material, with compressed air charged with dry particles of an abrasive substance wherein the drying and cleaning step includes the step of:
• simultaneously filtering air from the pipe made of the nonmetal material, with a vacuum;
• and
• coating inside walls of the pipe made of the nonmetal material, with an epoxy barrier coating leak sealant maintained by a continuous positive pressure to coat the inside walls of the pipe made of the nonmetal material with a single coating leak sealant layer in a single sealant stage.