Threaded joint for metal tubes with internal coating

Details Threaded joint for metal tubes with internal coating Threaded joint for metal tubes with internal coating

1996-12-23

1999-05-25

Nicholson, Eric K.

Pipe joints or couplings

With casing, lining or protector

Lined

285333, F16L 2500

Patent

active

059063998

ABSTRACT:
The invention concerns threaded joints for tubes, having a layer intended in particular to protect the tubes and the joints from corrosion or to improve the conditions for a flow of fluids. The joint comprises two tubular threaded components each provided with a radial annular surface. The internal wall of the components and the annular surfaces are covered with a layer. The shape of the annular surfaces is such that in the screwed state those surfaces are partially in abutment contact at their external portion, their internal portion creating a progressive opening zone which is at least partially filled by the layers of the two components.

REFERENCES:
patent: 2532632 (1950-12-01), MacArther
patent: 3100656 (1963-08-01), MacArthur
patent: 3192612 (1965-07-01), Elliott et al.
patent: 3489437 (1970-01-01), Duret
patent: 3499666 (1970-03-01), Turner
patent: 4373750 (1983-02-01), Mantelle et al.
patent: 4568113 (1986-02-01), Axford et al.
patent: 4856828 (1989-08-01), Kessler et al.
patent: 4875713 (1989-10-01), Carstensen
patent: 5236230 (1993-08-01), Mudge, Jr. et al.

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