Pipe joints or couplings – Molded joint – Weld
Reexamination Certificate
2006-03-14
2006-03-14
Bochna, David (Department: 3679)
Pipe joints or couplings
Molded joint
Weld
C285S288900
Reexamination Certificate
active
07011343
ABSTRACT:
A welded pipe joint having reduced internal stresses comprises a pipe, a socket fitting, and an annular weld. The end surface of the fitting is chamfered, preferably in a concave profile, so that the weld profile subtends an angle of from about 100 degrees to about 120 degrees, rather than the customary 90 degrees. The pipe has no dam or other protuberance to confine the bead of added metal. Prior to welding, the fitting may have an annular lip immediately surrounding the surface of the pipe and may also have a ring spaced from the lip. The ring may be integral with the fitting and spaced from the lip by thin, radially spaced metal bars or may be separate from the fitting.
REFERENCES:
patent: 1083767 (1914-01-01), Stewart
patent: 1630037 (1927-05-01), Stresau
patent: 1648392 (1927-11-01), Fuetterer
patent: 1810091 (1931-06-01), Siegle
patent: 1810825 (1931-06-01), Furrer
patent: 1810902 (1931-06-01), Burnish
patent: 1842298 (1932-06-01), Smith
patent: 1872271 (1932-08-01), Furrer
patent: 1881979 (1932-10-01), Taylor
patent: 1903315 (1933-04-01), Priebe
patent: 1903239 (1933-11-01), McWane
patent: 1960557 (1934-05-01), Snyder
patent: 1977678 (1934-10-01), Kidd
patent: 1980561 (1934-11-01), Wagner
patent: 2014795 (1935-09-01), Birdsey
patent: 2034808 (1936-03-01), Graham
patent: 2037962 (1936-04-01), Brown
patent: 2050339 (1936-08-01), Kidd
patent: 2120062 (1938-06-01), Blevins
patent: 2130587 (1938-09-01), Kane
patent: 2136474 (1938-11-01), Stray
patent: 2211173 (1940-08-01), Shaffer
patent: 2216033 (1940-09-01), Hopkins
patent: 2258913 (1941-10-01), Stone
patent: 2324335 (1943-07-01), Taylor
patent: 2336297 (1943-12-01), Rooke
patent: 2366579 (1945-01-01), von Ahrens
patent: 2633374 (1953-03-01), Boice
patent: 2867036 (1959-01-01), Hovelmann
patent: 3033145 (1962-05-01), Thielsch
patent: 3101532 (1963-08-01), Christensen
patent: 3482304 (1969-12-01), Brigot et al.
patent: 3677580 (1972-07-01), Klanke
patent: 3849871 (1974-11-01), Kaunitz
patent: 4179141 (1979-12-01), Newman
patent: 4346918 (1982-08-01), Lycan
patent: 4505420 (1985-03-01), Wittenbach
patent: RE32892 (1989-03-01), Simons
patent: 5685571 (1997-11-01), Gardner
Jay K. Smith, Vibrational Fatigue Failures in Short Cantilever Piping . . . Fittings; PVP-vol. 338, Pressure Vesseles & Piping Codes & Standards ASME—1996 p 21-24.
Peter C. Ricardella, et al., “Fracture Mechanics Analysis of Socket Welds . . . Loading” PVP-vol 353 Pressure Vessel & Piping Codes & Standards, ASME 1997, pp. 23-34.
Makoto Higuchi et al, Fatigue Strength of Socket Welded Pipe Joint PVP—vol 313-1, PVP—vol 313-1, International Press. Vessel & Piping Codes & Standards; Volume, ASME—1995, pp. 69-76.
Maroto Higuchi, et al, “A Study on Fatige . . . Socket Welded Pipe Joints,” PVP—vol 338, Pressure Vessels & Piping Codes & Standards, vol. -1, ASME 1996, pp. 11-19.
The American Society of Mech. Engineers, “Code for Pressure Piping” ASA B31.1-1955, Cover Page, pp. 125, 126.
The American Society of Mech. Engineers,“1998 Sections III, Division 1-NC” pp. 269-270.
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