Composite pipe arrives on site in good condition and spends days or weeks waiting in a laydown area. What happens in that window, sun exposure, stacking weight and open pipe ends, decides whether the material that goes in the ground is as good as the material that came off the truck.
Sunlight and Shelf Life
Ultraviolet exposure degrades composite pipe over time. Store coils and straight lengths under cover or with appropriate sheeting, and track how long material has been waiting. Pipe that has sat through a full summer outdoors deserves a visual review before use; surface chalkiness or color change is a reason to ask the supplier before burying it.
Stacking and Support
Stack straight lengths on level supports spaced so the pipe does not sag between them, with similar sizes stacked together and the stack kept low enough to walk past safely. Coils store flat, not on edge, and never with other material stacked on top. The pipe at the bottom of a tall, badly supported stack carries the weight of everything above it.
Protecting the Ends
Open pipe ends invite exactly the wrong things in: mud, stones, insects, water. Keep end caps on until the moment of jointing, and cap anything that waits overnight in an open trench. A few minutes of grit inside a pipe becomes an abrasion and contamination problem that flushing only partly solves.
Handling Discipline and Rotation
Drag pipe across ground and the outer wall picks up scratches that matter more than they look. Lift coils with proper equipment, carry lengths with two people, and when cutting for a fit, clean the work area first. Use material in delivery order so the oldest stock goes in the ground first; the corner of the laydown area where forgotten pipe lives is where shelf life quietly runs out.
| Factor | Practice | Risk if ignored |
|---|---|---|
| Sunlight | Covered storage, exposure tracked | Surface degradation |
| Stacking | Level supports, low stacks | Deformation under load |
| Ends | Caps on until jointing | Debris in the line |
| Rotation | Oldest stock first | Shelf life overrun |
Frequently Asked Questions
How long can composite pipe sit outdoors?
Follow the manufacturer’s stated storage guidance for your climate; covered storage removes most of the question.
Does scratched pipe need attention?
Show anything beyond light surface marks to the supplier rather than burying the doubt; wall condition is the pipe’s whole job.
Are end caps really necessary for short waits?
Yes. Debris enters in minutes, and trench water carries fines that dry into stubborn deposits inside the line.
Can VOHON advise on storage for shipped pipe?
Yes. VOHON provides handling and storage guidance with composite fuel pipe shipments; questions reach the team at lixiang@vohon.cn.