Metal fusion bonding – Process – With clamping or holding
Patent
1983-02-15
1985-03-19
Ramsey, Kenneth J.
Metal fusion bonding
Process
With clamping or holding
228 57, 285 22, B23K 3102, B23K 3704
Patent
active
045054207
ABSTRACT:
A method of joining a first pipe having an outer surface and an annular end face and a fitting having an end face surrounding a shoulder recessed therein which includes inserting a spacer having a predetermined thickness and formed of a synthetic resin into the recess in abutment with the annular shoulder followed by inserting the annular end face of the pipe into the recess until the annular end face, the spacer and the annular shoulder are in mutual contact, temporarily tack welding the pipe to the fitting to establish spacing between the annular end face of the pipe and the annular shoulder of the fitting, and permanently welding the pipe to the fitting. In one embodiment, the heat from the permanent welding step vaporizes the spacer leaving a gap of predetermined size between the confronting annular end face of the pipe and the annular shoulder of the fitting. Also disclosed are a suitable fitting for use in joining a pipe and the fitting, which fitting includes a spacer constructed of synthetic resin material. Various configurations of spacers suitable for use in the fitting and practicing the method are also disclosed.
REFERENCES:
patent: 1810825 (1931-06-01), Furrer
patent: 1872240 (1932-08-01), Burnish
patent: 3338499 (1967-08-01), Gilbert
patent: 3574377 (1971-04-01), Petitt
patent: 3917149 (1975-11-01), Breton et al.
patent: 4342606 (1982-08-01), Notton
patent: 4346918 (1982-08-01), Lycan
J. Laskonis et al., "Socket Welds-Inexpensive Design For Small Diameter Piping", Welding Journal, Feb. 1982, pp. 50, 51.
Phillips Petroleum Company
Ramsey Kenneth J.
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