Fiberglass pipe jointing methods and systems

A system of jointing reinforced thermosetting resin (RTR) pipe, comprising:

• a first RTR pipe having a first spigot portion, the first spigot portion including a first joining surface, wherein a portion of the first joining surface comprises external grooves;
• a second RTR pipe having a second spigot portion, the second spigot portion having a second joining surface, wherein a portion of the second joining surface comprises external grooves;
• a coupler having a first socket portion at a first end and a second socket portion at a second end, wherein a portion of the first end and the second end comprises internal grooves, wherein a wall thickness of the coupler increases from each end to a center portion having a maximum wall thickness;
• a first cavity between a portion of the first joining surface and the first socket portion, the first cavity formed when the first spigot portion is push-fit into the first socket portion and abuts the internal joining surface of the first socket portion of the coupler;
• a second cavity between a portion of the second joining surface and the second socket portion, the second cavity formed when the second spigot portion is push-fit into the second socket portion and abuts the internal joining surface of the second socket portion of the coupler;
• an injectable/curable material located in the first and second cavity;
• and
• a resistance wire applied to at least one of the first joining surface and the second joining surface, wherein the first joining surface and the second joining are mating surfaces.