Large-caliber pipe for thermoplastic material

Details Large-caliber pipe for thermoplastic material Large-caliber pipe for thermoplastic material

1990-09-14

1991-10-29

Bryant, III, James E.

Pipes and tubular conduits

Spirally seamed

138115, 138150, 138174, F16L 916

Patent

active

050606980

ABSTRACT:
A large-caliber pipe consisting of thermoplastic, constructed from an extruded hollow plastic profile having helical turns welded along a helical contact seam. The hollow plastic profile is a multi-cell profile having a rectangular overall cross section and a rectangular cross section of the cells. The plastic has an integrated reinforcement consisting of embedded fibers in a quantity of 5 to 30% by weight, preferably about 10% by weight, based on the total weight. At least a proportion of the fibers is oriented in the direction of the turns. The orientation of the fibers results in an anisotropic modulus of elasticity and hence an increased annular rigidity and stability.

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patent: 4627472 (1986-12-01), Goettler et al.
patent: 4759389 (1988-07-01), Suck

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