Corrstop™ Dual Laminate Tanks & Equipment

Corrstop Equipment CorrStop Dual Laminate fiberglass equipment provides cost effective solutions for your corrosive process system needs. Equipment made with Dual laminate FRP composites, using a thermoplastic inner liner and a fiberglass composite exterior, combine the advantages of thermoplastic with reinforced thermoset plastics to produce a product with top quality corrosion resistance and mechanical performance.

All of this is accomplished at less cost than high nickel alloys, with less weight, cutting down transportation and installation costs, while also offering abrasion resistance, electrical and to some extent thermal insulating properties compared to metallic alternatives.

Corrstop Thermoplastic Lined Fiberglass Duct, Pipe and Equipment

Liner Materials
Thermoplastic liner materials typically used in dual laminate construction include most grades used for manufacturing small plastic pipe and equipment, Including:

PVC - polyvinyl chloride 
CPVC - chlorinated polyvinyl chloride 
PP - polypropylene 
PVDF - polyvinylidine fluoride 
ECTFE - ethylene chlorotrifluoroethylene 
FEP - fluorinated ethylenepropylene 
PFA - perfluoroalkoxy (PFA)
ETFE - ethylenetetrafluoroethylene

Liner materials are selected based upon an evaluation of corrosion requirements at the process temperature, with other considerations such as flame retardancy, mechanical properties and cost being factored in. See the tables for additional guidance in these areas.

PVC and CPVC are usually bonded directly to the FRP laminate using a bonding resin, while other thermoplastic liners are typically manufactured with an embedded fabric or fiberglass backing. This fabric backing provides a strong mechanical lock when overlaid with the fiberglass structural composite.

Engineering & Product Design

Following the selection of an appropriate liner material, the overall product design is completed by an evaluation of equipment mechanical requirements based upon pressure, vacuum, wind, seismic and any other mechanical loads. The fiberglass structure itself is designed using well established guidelines from such sources as the ASME RTP-1 (U.S.A.), BS-4994 (U.K.), CGSB-41.22-93 (Canada) or others. Many of these same standards also provide guidelines for proper application of dual laminate fabrication techniques.

These international standards take into account the anisotropic nature of fiberglass reinforced laminates, which results in behavior much different than typical steel alloys. Composites USA has been designing and building RTP composite equipment since 1982, and we have a thorough understanding of how these materials behave.

With our experienced composites engineers and extensive proprietary computer analysis tools, we are able to design the most cost effective long term solution to your process equipment needs. Where required for insurance or other reasons, calculations and drawings can be stamped by Composites USA licensed PE's.

Fabrication of Dual Laminate Equipment 

Following design and customer approval of Composites USA fabrication drawings, the equipment enters the production cycle. Special molds, if required, will be manufactured in house. The liner material is thermally formed with pressure or vacuum assist, and assembled into a completed part.

All Composites USA welders are qualified and routinely tested to assure uniformity and strength on bonds. In addition, all welds are tested 100% by use of a 10-15,000-v high voltage spark test, using either conductive resin behind the welds, or alternatively a conductive reinforcement behind the entire liner.

Following the successful assembly of the liner, the fiberglass structure will be applied using either hand lay up or filament wound techniques. Structural overlay materials available for use are nearly unlimited; including space age thermosets and advanced composite reinforcements, but most commonly would include vinyl ester resin with E-glass reinforcement. Fabrication tolerances meet or exceed those of the previously mentioned international standards, and are guaranteed by our independently audited and approved Composites USA Quality Assurance Process.

Member of the American Composites Manufacturing Association
American Composites Manufacturers Association