We design, manufacture and erect Field Storage Tanks, Reaction Vessels, Pressure Vessels, Wet Gas Electrostatic Precipitators, Scrubbing Systems, Exhaust Systems, Polymer Concrete Cells, Gratings, Linings etc. For detailed information regarding a specific product, do fill up our inquiry form.
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Design
Majority of CPE's products are custom-made conforming to the International standards like:a. BS 4994 : 1987
b. ASTM D 3299 - 81
c. ASME - Section X
d. ASME RTP-1-2000
e. AD 2000 - Merkblatt N1 f. NBS Voluntary Products Standard, PS 15 - 69
CPE has its own Design department with full-fledged facilities for designing and drafting. These departments are manned by qualified personnel who have abundant experience in their field of work with the latest CAD programmes.
Why FRP?
The MAIN characteristics of thermosets (literally 'setting under heat') is that they require curing, when they undergo a molecular cross-linking process which is irreversible and renders them infusible. They thus offer high thermal stability, plus good rigidity and hardness and resistance to creep. It also means that, once cured, the resin and its laminate cannot be reprocessed, except by methods of chemical break-down, which are currently under active development. For practical purposes, therefore, cured thermosetting resins can be recycled most effectively if ground to fine particles, when they can be incorporated into new laminates, as cost-effective fillers.
Thermosetting resins have little use as pure resin, but require addition of other chemicals to render them processable. For reinforced plastics, the compounds usually comprise a resin system (with curing agents, hardeners, inhibitors, plasticisers) and fillers and or reinforcement. The resin system provides the 'binder', to a large extent dictating the cost, dimensional stability, heat, chemical resistance and basic flammability. The reinforcement can influence these (particularly heat-and dimensional-stability), but the man effect is on tensile strength and toughness. High-performance fibres, of course, have a fundamental influence on cost.
Special fillers and additives can influence mechanical properties, especially for improvement in dimensional stability, but they are mainly used to confer specific properties, such as flame retardancy, UV stability or electrical conductivity.
Thermosetting resins are normally used in the liquid state and solidify and harden on curing. With some resins it is possible to part-cure and then hold the resin in what is termed the B-stage, for the cure to be completed at at later time.
FRP Properties
Epoxy
Excellent composite properties. Very good chemical resistance. Good thermal properties. Very good electrical properties. Low shrinkage on curing. Can be B-staged.
Phenolic
Very good thermal properties. Good fire resistance (self-extinguishing). B-stage possible. Good electrical properties.
Polyester
Wide choice of resins; easy to use. Cure at room temperature and elevated temperature. Very good composite properties. Good chemical resistance. Good electrical properties.
Vinylester
Good fatigue resistance. Excellent composite properties. Very good chemical resistance. Good toughness.