IP Library Patent Application 18864834
Patent Application
App. No. 18/864,834

METHOD OF APPLYING RUBBER LINING TO THE INTERNAL SURFACE OF PIPING AND FITTINGS

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Quick Facts
Patent No.
US None
App. No.
18/864,834
Abstract

A method of lining a piping assembly with rubber to form a rubber liner. An inner surface of the piping assembly is selected for lining. One or more containment devices are attached/inserted in the piping based on the selected surfaces. The inflatable bladder is introduced to an inner bore of the piping. The inflatable bladder is inflated to a predetermined pressure. An oven or autoclave is heated to a predetermined temperature. The piping assembly is introduced to the oven and heated until a predetermined curing temperature. The piping assembly is cooled for a predetermined cooling time and a rubber inner liner is formed on the selected surface.

Claims (56)

1 . A method of lining a piping assembly with rubber, the method comprising:

selecting an inner surface of the piping assembly for lining;

inserting one or more containment devices in the piping based on the selected surfaces;

introducing the inflatable bladder to an inner bore of the piping;

inflating the inflatable bladder to a predetermined pressure;

pre-heating an oven to a predetermined temperature;

introducing the piping assembly to the oven and heating until a predetermined curing temperature; and

cooling the piping assembly for a predetermined cooling time and a rubber inner liner is formed on the selected surface.

2 . The method of claim 1 , further comprising:

roughening the selected surface;

removing impurities from the selected surface;

applying a primer bonding agent to the selected surface; and

applying a secondary bonding agent to the selected surface;

3 . The method of claim 1 , further comprising:

degreasing an outer surface of an inflatable bladder assembly;

applying a release agent to the outer surface of the inflatable bladder assembly;

selecting an amount by weight of rubber material based on the selected surface, the piping assembly and a geometry of the piping; and

wrapping the selected rubber material over the inflatable bladder.

4 . The method of claim 1 , further comprising securing the inflatable bladder to the piping prior to inflating the inflatable bladder.

5 . The method of claim 1 , further comprising closing supply valves of the piping prior to inflating the inflatable bladder.

6 . The method of claim 1 , comprising selecting one or more additional inner surfaces for applying a rubber liner and applying the rubber liner to the selected one or more additional inner surfaces.

7 . The method of claim 1 , further comprising inspecting the rubber liner for bonding and/or delamination.

8 . The method of claim 1 , further comprising removing the one or more containment devices.

9 . A method of lining a piping assembly, the method comprising:

roughening internal surfaces of piping;

removing impurities from the internal surfaces;

applying a primer bonding agent to the internal surfaces;

applying a secondary bonding agent to the internal surfaces;

inserting one or more containment devices in the piping;

degreasing an outer surface of an inflatable bladder assembly;

applying a release agent to the outer surface of the inflatable bladder assembly;

selecting an amount by weight of rubber material based on the piping and a geometry of the piping;

wrapping the selected rubber material over the inflatable bladder;

introducing the inflatable bladder to an inner bore of the piping;

securing the inflatable bladder to the piping;

inflating the inflatable bladder to a predetermined pressure;

closing supply valves of the piping;

pre-heating an oven to a predetermined temperature;

introducing the piping to the oven and heating until a predetermined curing temperature; and

the piping is removed from the oven and cooled for a predetermined cooling time and an inner liner is formed on the inner surfaces.

10 . The method of claim 9 , further comprising removing the one or more containment devices.

11 . The method of claim 9 , further comprising inspecting a bonding of the rubber lining with the inner surfaces.

12 . A piping assembly comprising:

piping;

an inflatable bladder coupled to the piping;

a valve coupled to the inflatable bladder;

a lid containment device connected to a top of the piping;

one or more containment coupled to the piping;

control circuitry connected to the inflatable bladder and having one or more processors configured to:

select an inner surface of the piping assembly for lining;

introduce rubber material into the inflatable bladder;

inflate the inflatable bladder to a predetermined pressure;

heat the piping assembly until a predetermined curing temperature and form a rubber liner on the inner surface.

13 . The assembly of claim 12 , the one or more processors configured to cool the piping assembly for a predetermined cooling time.

14 . The assembly of claim 12 , the one or more processers configured to inspect the rubber liner.

15 . The assembly of claim 12 , further comprising an oven for heating the piping 101 .

Assignments (1)
CHANGE OF NAME Recorded Feb 10, 2025
From: CONTITECH USA, INC.
To: CONTITECH USA, LLC
Reel/Frame 070615/0527 →