Spiral wound strengthening for composite pipeline
Spiral wound strengthening for composite pipeline
(OP)
Our 10 inch pipeline is from thin wall pvc, externally wrapped with grp. Due to increased pressure rating the line often bursts and we consider adding extra wrapping for greater strength. Since the circumferencial stress is twice the axial it is suggested that we use a unidirectional carbon fibre tape of 2 inches width plus resin. When we start the job the speed of job completion is critical therefore we wondered if the "bandages" need not overlap but could be spaced apart by maybe 2 inches. Any comments will be appreciated.





RE: Spiral wound strengthening for composite pipeline
Why does increasing the spacing decrease the time required? Why not just use a standard glass / polyester overwrap, with the thickness increased to compensate for the reduced mechanicals.
What is the construction of the grp overwrap is it a typical 54° helic, or is it a nearly circumferential (hoop) wound element?
RE: Spiral wound strengthening for composite pipeline
If you are to reinforce the tube I would recommend that the tube is fully covered.
RE: Spiral wound strengthening for composite pipeline
Meanwhile we arranged to over coat a few teast coupons and it seems to indicate that one single layer of unidirectional glass tape will double the burst pressure. I,ll update you when we know more. Thanks again. D W