Parts are made by winding continuous fiberglass roving or fabric saturated with a binding resin on a round-shape tooling at various angles. Products can be of various lengths and thicknesses.
This is a popular technique for producing large numbers of pipes and vessels. The use of the various winding angles combined with various chemical-, fire-, heat-,
and abrasion-resistant materials allows the creation of products for oil extraction, potable water supply, pulp lines, and the chemical industry.
The winding process has several versions depending on the production cycle (constant or periodical) and winding method (criss-cross or straight winding). There are also movable systems to make big tanks with diameters of up to 24 metres in place.
Examples of application:
1. casing strings 2. oil pipelines 3. sewage pipes 4. sewage pump stations 5. fuel tanks 6. tank car tanks 7. high pressure vessels
Orthophthalic non-pre-accelerated resin for winding. Gel formation time 20-30 minutes.
Vinyl-ester resin for winding tanks and vessels. Has high chemical resistance. Gel formation time 25-33 minutes.
Direct roving for winding with universal sizing. It is well wetted and does not break under longitudinal stress.
Advantages of the technique:
1. high productivity 2. high quality of the final product; the settings of the equipment can be adjusted to the required properties of the product 3. less dependent on the human factor
Disadvantages of the technique:
1. high price of the equipment 2. big production areas are required to install the winding equipment