Method of fabricating threaded connection for pipes

Details Method of fabricating threaded connection for pipes Method of fabricating threaded connection for pipes

1988-07-14

1989-06-13

Crane, Daniel C.

Metal deforming

With cutting

Machining after final metal-deforming

72367, 29157R, B21D 4102, B21D 4104, F16L 1500

Patent

active

048380687

ABSTRACT:
The method of fabricating threaded pipe joints to eliminate variations in tensile strength produced by tolerance variations in the wall thickness of a pipe. Such tolerance variations are eliminated by cold forming and then machining the entire lengths of both the pin and box ends of the threaded pipe joint. A precise mathematical relationship between the root diameter of the threads and the wall thicknesses of the pin and box portions of the pipe eliminates the creation of critical areas having reduced tensile strength.

REFERENCES:
patent: 2154037 (1939-04-01), Eaton
patent: 2211178 (1940-08-01), Stone
patent: 2494128 (1950-01-01), Holmquist et al.
patent: 4373754 (1983-02-01), Bollfrass et al.
patent: 4753460 (1988-06-01), Tung

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