Pipe lining process

Details Pipe lining process Pipe lining process

1990-11-21

1992-02-25

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

138 97, 138DIG5, 156287, 156294, 264 36, 264230, 264269, 264521, 264573, B29C 6338, B29C 5308

Patent

active

050911376

ABSTRACT:
A method is provided for lining a pipe wherein a thermoplastic liner is initially formed in a cylindrical shape with a diameter slightly larger than the internal diameter of the pipe. The liner is temporarily deformed at an elevated temperature to a different cross-section, preferably U-shaped, to reduce its overall cross-sectional dimension to facilitate insertion into the pipe to be lined. The deformation occurs with substantially comparable elongation of the pipe lining along its opposite sides thereby precluding variations in wall thickness and stress in the pipe. Once inserted, the liner is pressurized and reheated first to a temperature below its crystallization temperature to round the lining in the pipe and subsequently, further pressurized and reheated to a second temperature higher than the crystallization temperature to cause the liner to retain its original round shape.

REFERENCES:
patent: 677142 (1901-06-01), Richardson et al.
patent: 2423260 (1947-07-01), Slaughter
patent: 2668987 (1954-02-01), Harris et al.
patent: 2724672 (1955-11-01), Rubin
patent: 2955318 (1960-10-01), Cook et al.
patent: 2980161 (1961-04-01), Howard
patent: 3192612 (1965-06-01), Elliott et al.
patent: 3335758 (1967-08-01), Bertolet, Jr.
patent: 3371770 (1968-03-01), Graham et al.
patent: 3429954 (1969-02-01), Atkins et al.
patent: 3543334 (1970-12-01), Sudo
patent: 3560295 (1971-02-01), Kimbrell et al.
patent: 3758361 (1973-09-01), Hunter
patent: 3897530 (1975-07-01), Leathers
patent: 3996967 (1976-12-01), Takada
patent: 4020136 (1977-04-01), Zaro
patent: 4028037 (1977-06-01), Dawson
patent: 4207130 (1980-06-01), Barber
patent: 4231740 (1982-03-01), Davis et al.
patent: 4233101 (1980-11-01), Scragg et al.
patent: 4273605 (1981-06-01), Ross
patent: 4361451 (1982-11-01), Renaud
patent: 4368091 (1983-01-01), Ontsuga et al.
patent: 4377894 (1983-03-01), Yoshida
patent: 4394202 (1983-07-01), Thomas et al.
patent: 4410391 (1983-10-01), Thomas et al.
patent: 4427480 (1984-01-01), Kamuro et al.
patent: 4446891 (1984-05-01), Gebelius
patent: 4483167 (1984-11-01), Hayashi
patent: 4496499 (1985-01-01), Brittain et al.
patent: 4504171 (1985-03-01), Florence, Jr.
patent: 4627471 (1986-12-01), Parkes et al.
patent: 4643855 (1987-02-01), Parkes et al.
patent: 4650703 (1987-03-01), Kleinheins
patent: 4691740 (1987-09-01), Svetlik et al.

Affiliated with

Also associated with

Rating

Pipe lining process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pipe lining process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pipe lining process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1891256