Pre-cured composite sleeve manufacturing

Composite can be completely manufactured in a factory (e.g., puUtruded such as Clock Spring ) or fiber and resin can be combined on site. Regardless of the manufacturing 

Rehabilitation of Pipelines Using Fiber-reinforced Polymer (FRP) Composites 

Unidirectional rovings can be used directly in composite manufacture, or they can be converted to otho- intmnediate products. Direct applications include the unidirectional rovings used in processes such as spray lay up, filament winding, and pultrusion. Pul-tmsion is the process in which glass rovings or tows, in a preselected orientation, are saturated with resin and pulled through a heated die, where the part is formed and cured. 

Continuous strand mat or swirl mat is similar in some respects to CSM, except that the fibers are continuous. Swirl mat is used in pultmsion, where the reinforcement is required to have sufficient integrity to allow it to be pulled through the process under tension. The glass can also be woven to form a glass cloth with various weaves such as plain, satin, or twill. 

For high-pressure pipeline repair applications, unidirectional alignment of the reinforcing glass and the pultmsion process has clear advantages. 

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