Apparatus and method for manufacturing a metal casing particular

Details Apparatus and method for manufacturing a metal casing particular Apparatus and method for manufacturing a metal casing particular

1979-10-25

1982-03-16

Rosenthal, Arnold

Valves and valve actuation

Reciprocating valve

Gate

251367, 291571R, F16K 2710

Patent

active

043197361

ABSTRACT:
A method and apparatus of manufacturing a metal casing, particularly for accessories, such as steel casings, and preferably gate valves which can be employed in installations requiring high safety measures and testing with testing heads, the casings having large nominal widths and particularly usable in nuclear reactors and the like, comprising, permanently deforming a bloom into a tubular body having one open end and an opposite closed end, deforming at least a portion of the tubular body to form at least two diametrically opposed sides thereof which are planar on their interior and exterior surfaces, forming a port in at least one of the planar ends having a diameter less than that of the diametrically opposed sides to leave an approach area around the port and connecting a pipe connection to the port by a single welding seam which can be tested with a testing head which can approach the seam in the approach area. A casing made in accordance with the method is also disclosed.

REFERENCES:
patent: 2868495 (1959-01-01), Lucas
patent: 3197175 (1965-07-01), Siepmann

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