Abstract: A pipe for extracting gases from a landfill well comprises a series longitudinal windings of fiber reinforced resin windings wound for providing longitudinal strength. The longitudinal windings are wound in directions opposite to and intersecting with each other, forming a interlocking network of windings and openings. A number of reinforcing ribs extend circumferentially around the surface of the right and left hand windings at equidistant positions along the surface and at each end of the pipe for providing radial stiffness. The reinforcing rib at each end of the pipe comprises a groove extending circumferentially around the outside surface of the rib for facilitating interconnection with adjacent pipes. A helical winding is wound around the surface of longitudinal windings between adjacent reinforcing ribs for providing longitudinal strength and radial stiffness to the pipe. The pipe comprises a plurality of perforations in its surface.

Abstract: A fiber reinforced plastic pipe tee is formed by winding glass rovings around a mandrel in a plurality of wrap patterns which collectively cover the pipe tee. A tape having synthetic fiber warp and glass roving weft is included in wrapping of the pipe tee. Such glass reinforcing fibers are oriented in the tee for resisting biaxial stresses. A bulge is provided on each side of the pipe tee in the diaphragm area for resisting biaxial stresses without introducing problems in winding the pipe tee.

Abstract: A fiber reinforced plastic pipe tee is formed by winding glass rovings around a mandrel in a plurality of wrap patterns which collectively cover the pipe tee. A tape having synthetic fiber warp and glass roving weft is included in wrapping of the pipe tee. Such glass reinforcing fibers are oriented in the tee for resisting biaxial stresses. A bulge is provided on each side of the pipe tee in the diaphragm area for resisting biaxial stresses without introducing problems in winding the pipe tee.