Patent · US Active

Double-wall pipe with a heat insulating layer and a plastic outer pipe thereof

US10054252B2 · kind B2 · utility

1Cited by

2References

9Claims

0Family size

Assignee

BRUGG ROHR AG HOLDING · CH

Inventors

Joern Homann · Hannover, DE
Stephan Peters · Vaterstetten, DE

Key dates

Filing date	Jun 9, 2016
Grant date	Aug 21, 2018
Priority date	—
Expiry date	Sep 30, 2036

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16L2011/047
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A double-wall pipe includes a media-conveying inner tube, and a multilayer plastics outer tube with a gas permeation barrier layer. The plastics outer tube includes a significant proportion of polyethylene (PE). The gas permeation barrier layer consists of a compact extruded polyethylene terephthalate (PET) layer having a material thickness of from 0.8 mm to 2 mm or comprises a closed-cell foam made from PET having a material thickness of between 10 mm and 100 mm. A heat insulating layer is arranged in an annular gap between the inner tube and the plastics outer tube.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.