Case Study
A new pipeline construction project in Oklahoma required a horizontal directionally drilled (HDD) bore to permit pipe installation under a creek bed. In such situations, girth welds associated with the field assembly of the pipeline must be coated and protected from mechanical damage through interactions with roller cradles and rocks/aggregate within the bore.
Horizontal Directional Drilling Challenges
- The field assembly of pipeline for installation via horizontal directional drilling produces unprotected girth welds.
- These girth welds must be coated on site to protect the cutback and subsequently protected from abrasion and wear occurring during pipe placement and pulling.
- Unprotected areas of the pipe or areas damaged during the pull will be susceptible to corrosion and potential pipeline failure.
Project Needs
- Protect corrosion inhibiting, two-part epoxy on girth welds and adjacent FBE cutbacks.
- Provide abrasion resistance over susceptible girth welds.
- Prevent future sub-surface degradation of pulled pipeline.
- Quick and repeatable field application of protective coating.
How Field Applied Composite Wraps Provide Protection...
Provided Protection
Although marring and gouging of the neighboring regions of the pipe and composite wrap were detected following the pull, Boreshield™ ARO II exhibited:
By sacrificially absorbing the impact and gouge energy experienced during the pull, the easy to install composite wrap provided protection to susceptible cutback and girth weld regions.
