FRP pipe with threaded end joint section

Details FRP pipe with threaded end joint section FRP pipe with threaded end joint section

1990-11-20

1993-05-25

Arola, Dave W.

Pipe joints or couplings

Screw

285423, 285919, 138109, 138140, 138DIG2, F10L 4700

Patent

active

052133796

ABSTRACT:
A fiber-reinforced plastic pipe with a male-threaded and/or female-threaded end joint section having improved axial strength and thread contour, exhibiting a high degree of seal tightness, and withstanding a high internal pressure. The female threads comprise a first resin layer, a second fiber-reinforced resin layer having continuous filaments extending at an angle of 0.degree..+-.15.degree. to the longitudinal axis of the pipe, and a third fiber-reinforced resin layer having continuous filaments extending at an angle of .+-.85.degree. to 90.degree. to the longitudinal axis. The male threads comprise short fibers flocked in the radial direction on a fiber-reinforced plastic substrate layer and impregnated with a resin.

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