winding&pultrusion pipe

Our company invent the Wet-process pull-winding high pressure continuous forming electric power and communicate Cable Conduit (FRP). The FRP latest Wet-process pull-winding forming technique(invention patent number:200410087555.0) its characteristics is have three layers maximal on lengthways, four layers maximal on hoop. Can according to customer’s demand. Cured under pressure circumstance, the pressure can up to 100MPA, so the lengthways strength of Conduit can up to 300-500 MPA, hoop pressure can up to more than 3KN. And surface smooth no matter inside or outside. No taper because of pultrusion, as well as smooth and neat, straight, easy to wear the line in construction, improved the ability of electric power ventilation and protection. The FRP Conduit are light weight, high strength, the weight is 1/4 of steel, 1/8 of concrete. In order to reduce the connecting point, cut the Conduit as long as transport vehicle, so speed the construction schedule. FRP Conduit, no corrossion and magnetism, suitable to protect single core electric wire. But the steel Conduit is magnetic, before using must passing the special processing, to prevent the eddy current. Additional, the FRP Conduit have a lot of other advantages: water, humidity and fire resistance, insulation, anti-corrosion, not rusty, the service life around 30-40 years. No need maintenance, install convenience, be applicable to electric power, communication, acid, alkali and so on situation. The invention has following advantages: 1. Generally the lengthways strength is 200%of ordinary wound Conduit, be free from any condition. 2. This kind of technics has same inside and outside diameter. 3. Can infinite extension, and cut down cost to reduce the connector. 4. Mean while it has the function of general FRP Conduit, light weight and strong, the weight is 1/4 of steel, 1/8 of concrete, one person can move, and convenience transport, simple construction, the strength equal with steel pipe. 5. Smooth inside wall, small friction coefficient, so penetrate through slippery, don’t damage cable. 6. Non-magnetism, no electric corrosion, being applicable to Single-core Cable, but the steel Conduit is the magnetism material, have to be use after special processing. 7. Insulate, resistance to chemical corrosion, not rusty, service life above 50 years. 8. Having Heat-proof, fire resistance, and big ampacity, can working at 130°C, better than PVC Conduit. 9. Resistant to cold condition, the strength that under the low temperature will be higher than in high temperature, but the PVC-U Conduit will be have fragile phenomenon under cold circummstance. 10. Good Water Resistance, can be use in damply or water environment for a long time, superior than abio-FRP Conduit. 11. Simply installation, lower cost, can resolve the problem that long time to construction and influence the city transportation etc. can carry out construction at nighttime, return to fill the road surface. 12. The Conduit adopt Holding-inserting connectiong method, convenient installtion, in order to accommodate thermal expansion and contraction, we add rubber seal ring at contact place as well as to modate mud and water run into the Conduit. 13. The lower comprehensive investment, quickly finish, make a tremendous social and economic benefit. Both inside and outside of Wet-process pull-winding high pressure forming Cable Conduit are smooth like mirror. Tensile strength ≥300MPa Friction coefficient N≤0.35 Flexural strength ≥320MPa Thermal distortion temperature °C≥130 Impact strength KJ/m2 ≥100 Heat conduction coefficient W/m.k≤0.22 Barcol hardness q≥38 Water-proof performance Flexural retention≥85% Density g/cm³1.7-1.9 Oxygen index I1 ≥28% I1≤75% Flattening force above 32KN No. Performance Standard Test result 1 The content of unsoluble part of resin ≥80 89.8 2 Flexural strength ≥135 444 3 Tensile strength ≥120 342 4 Impact performance No bruise check or visible crack 5 Stiffness (when Radial variation rate 10%)Mpa ≥2.4 4.6 6 Thermal distortion temperature°C ≥130 202 7 After soak flexural strength retention% ≥80 93.3 8 Barcol hardness ≥35 39 9 Oxygen index% 26 26.2