.png){kind=icon}
.png){kind=icon}
Return
Study on the Barrier Layer Structure and Failure Analysis of HBPE Liner Insertion Pipe
.png){kind=icon}
PRE
AI
J
Z
H
Z
H
H
DOI：10.1002/app.71050.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
This study investigates the failure mechanisms of high-barrier polyolefin (HBPE) liner insertion pipes used in oil and gas systems. Structural and mechanical analyses reveal that the pipe utilizes an ethylene-vinyl alcohol copolymer (EVOH) barrier layer with excellent gas resistance. Crucially, field failures are driven not by chemical aging, but by the physical swelling and plasticization of the inner high-density polyethylene (HDPE) liner due to long-term medium exposure. This swelling drastically reduces the adhesive layer's cohesive strength, causing interfacial peel strength to drop from 5.49 to 0.59 N/mm, which triggers complete interlayer debonding and ultimate liner collapse. The long-term reliability of these composite pipes fundamentally depends on the adhesive layer's resistance to medium-induced swelling under actual service conditions.
Keywords:
EVOH barrier layer
failure analysis
HBPE liner insertion pipe
interfacial debonding
structural instability
Journal
IF:
2.8
Papers:
3.4K
Citations:
6.9W
Organization
Cited Papers