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Patent Searching and Data


Title:
LINING OF INSIDE OF PIPE PATH
Document Type and Number:
Japanese Patent JPH04187269
Kind Code:
A
Abstract:

PURPOSE: To form a uniform lining surface in a whole pipe by injecting a coating material from one edge of a main pipe path or each branching pipe path in the inside of the pipe path, blowing gas and reinjecting a coating material from the edge part of each of the branching pipe paths after the coating material is hardened.

CONSTITUTION: After the coating of the whole pipe path is completed and the coating material is hardened, a coating material 500cP at a viscosity is injected into a connecting pipe of the edge part of the pipe path 5 and a cylinder which is formed from a soft polyurethane foam of 20kg/m3 at a density, is inserted in the connect pipe used for injecting the coating material from the edge part of the pipe path 5 and be connected to an air hose 25. The other edge 2 of the main pipe path is opened and, in other pipes 10A-10P, a small volume of back flow preventing air is charged by opening valves 23A-23D. Next, by slightly opening a valve 23, air is charged to the pipe 5, then a polyurethane foam is inserted in a connect pipe at edge part 11A of the branched pipe path 10A. Back flow-preventing air is charged to the other branched pipe paths and the polyurethane foam is advanced with the same step and it is recovered from the edge 2. Hence the lining surfaces of multibranched piping having branching pipes are uniformly coated.


Inventors:
TOMOYASU TAKAHARU
MIYAMOTO KANJI
Application Number:
JP31250290A
Publication Date:
July 03, 1992
Filing Date:
November 16, 1990
Export Citation:
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Assignee:
MITSUI PETROCHEMICAL IND
International Classes:
F16L58/10; B05C7/04; B05C7/08; B05D7/22; F16L55/26; (IPC1-7): B05C7/04; B05D7/22; F16L58/10
Attorney, Agent or Firm:
Munenori Sato (2 outside)