Aerogel clamshell insulation

Patent metadata

Field	Value
Publication number	US-2020191317-A1
Application number	US-201816222358-A
Country	US
Kind code	A1
Filing date	Dec 17, 2018
Priority date	Dec 17, 2018
Publication date	Jun 18, 2020
Grant date	—

Abstract

An insulation product for a pipe-in-pipe pipeline having a clamshell assembly formed of a lightweight, semi-rigid material forming an annular cylinder when closed around a pipe and configured to fill an internal space of a pipe-in-pipe pipeline system. The annular cylinder is split into multiple sections, each section having an internal void filled with insulating material, such as aerogel. The multiple sections are connected by flexible portions or hinges. The aerogel insulation is contained within a section of the annular cylinder. The clamshell assembly is quickly and simply installed to a pipeline and accepts a wide variety of insulation types and forms to reduce production time and expense.

First claim

What is claimed is:

1 . An insulation device comprising:
a first and a second thin-walled shell, each defining a half annular cylinder and each defining an enclosed inner space; insulating material filling the enclosed inner space of the first and the second thin-walled shell; a hinge securing a first edge of the first thin-walled shell to a second edge of the second thin-walled shell, the hinge configured to allow the first and the second thin-walled shell to form an open and a closed configuration, wherein:
the first and the second thin-walled shells form an annular cylinder in the closed configuration so as to be configured to entirely enclose an inner pipe within the annular cylinder in the closed configuration; and
a securing mechanism to secure the first and the second thin-walled shells together when in the closed configuration.

2 . The insulation device of claim 1 , wherein the first and the second thin-walled shell are made of a lightweight, semi-rigid material.

3 . The insulation device of claim 1 , wherein the insulating material comprises aerogel particles.

4 . The insulation device of claim 3 , wherein the insulating material further comprises an opacifier.

5 . The insulation device of claim 1 , wherein the first and the second thin-walled shells are coated with a thin material configured to reduce an emissivity of the first and the second thin-walled shells.

6 . The insulation device of claim 1 , wherein the first and the second thin-walled shells each comprise half of a centralizer to centrally position the inner pipe within an outer pipe.

7 . The insulation device of claim 1 , wherein a length of the first and the second thin-walled shells is configured to fit between centralizers of a pipe-in-pipe system.

8 . A method of insulating a pipe-in-pipe system, the method comprising:
opening a clamshell insulation unit; closing the clamshell insulation unit around an inner pipe; securing the clamshell insulation unit about the inner pipe; providing a centralizer at a first end of the clamshell insulation unit, the centralizer concentric with the inner pipe; and enclosing the inner pipe and the clamshell insulation unit in an outer pipe, the inner pipe positioned concentrically within the outer pipe by the centralizer.

9 . The method of claim 8 , wherein the clamshell insulation unit comprises:
a first and a second thin-walled shell, each defining a half annular cylinder having an enclosed inner space; insulating material filling the enclosed inner space of the first and the second thin-walled shell; and a hinge securing a first edge of the first thin-walled shell to a second edge of the second thin-walled shell, the hinge configured to allow the first and the second thin-walled shell to have an open and a closed configuration, wherein:
the first and the second thin-walled shells form an annular cylinder in the closed configuration; and
a securing mechanism to secure the first and the second thin-walled shells together when in the closed configuration.

10 . The method of claim 8 , wherein:
the clamshell insulation unit is a first clamshell insulation unit; and wherein the method further comprises:
opening a second clamshell insulation unit;
closing the second clamshell insulation unit around the inner pipe;
positioning the second clamshell insulation unit adjacent to the first clamshell insulation unit; and
securing the second clamshell insulation unit about the inner pipe.

11 . The method of claim 8 , wherein:
the clamshell insulation unit is a first clamshell insulation unit; and wherein the method further comprises:
opening a second clamshell insulation unit;
closing the second clamshell insulation unit around the inner pipe;
positioning the second clamshell insulation unit with a first end adjacent to the centralizer; and
securing the second clamshell insulation unit about the inner pipe.

12 . The method of claim 11 , wherein:
the centralizer is a first centralizer; and the method further comprises:
positioning a second centralizer on the inner pipe, the inner pipe positioned concentrically within the outer pipe by the first and the second centralizers.

13 . The method of claim 8 , the method further comprising:
filling an enclosed inner space of the clamshell insulation unit with particles having a high thermal resistance value.

14 . The method of claim 13 , wherein the particles comprise:
aerogel particles.

15 . A pipe-in-pipe insulation system comprising:
a first and a second hollow body extending along an axis and each having a half annular ring cross section perpendicular to the axis, wherein the first and the second hollow body are filled with an insulating material; a hinging mechanism to allow the first hollow body to rotate relative to the second hollow body; a securing mechanism configured to secure the first and the second hollow body together to form an annular cylinder which fits inside an outer pipe and through which an inner pipe passes; and a centralizer configured to position the inner pipe concentrically within the outer pipe.

16 . The pipe-in-pipe insulation system of claim 15 , wherein the centralizer is affixed to a first end of the first and the second hollow body.

17 . The pipe-in-pipe insulation system of claim 15 , wherein the first and the second hollow body are thin-walled.

18 . The pipe-in-pipe insulation system of claim 17 , wherein the first and the second hollow body are formed of a lightweight rigid material.

19 . The pipe-in-pipe insulation system of claim 15 , wherein the centralizer comprises the first and the second hollow body when secured to form the annular cylinder.

20 . The pipe-in-pipe insulation system of claim 15 , wherein the insulating material comprises aerogel.

Assignees

• Johns Manville

Inventors

• Mcbride Christopher
• Griffin Christopher James
• Koravos Jason

Classifications

• F16L59/028

  Compositions for or methods of fixing a thermally insulating material · CPC title

• F16L59/023 Primary

  with a hinge opposite the slit · CPC title

• F16L59/024 Primary

  consisting of two half sleeves · CPC title

• F16L59/08

  Means for preventing radiation, e.g. with metal foil · CPC title