PVC-U electrical insulation conduits and fitting in buildings
- Ref Price:
-
- Loading Port:
- Qingdao
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 500 m
- Supply Capability:
- 5000 m/month
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Specification
PVC-U eletctrical conduits is made of polyvinyl chloride resion,adding special additivies to be produced by extrusion and injection.PVC-U conduits are mainly used as electrical, communications cable casing.Standard implementation is JG3050-1998 specification for electrical insulation conduits and fitting in buildings
◆ PVC electical conduits is widely used in concrete of construction、floor and wall as wire conduits (underground conduits);gennerally as wiring conduits ,telecommunications and network cabling conduits.
◆ Compared with traditional steel wire ,PVC electrical conduits has characteristics:
◎ Hight resistance to pressure:PVC conduits can stand about 750N pressure and can be externally installed or buried in concrete avoiding any damage caused by pressure.
◎ PVC conduit is moisture proof and has excellent resistance to acid, alkali and rust-eaten.
◎ Flame retardant: PVC insulating electric engineering casing can be self extinguished when kept away from fire (it can be self-extinguished after leaving off flame for 30s), so fire can't be spreaded along the pipe.
◎ It is insulated. In soaking condition, PVC conduit will not be broken down by the electricity of AC2000V, 50Hz. In aspect of avoiding electric shock, international tendency is that insulation is preferred to earth connection. PVC insulation electrical conduit meets this requirement.
◎ Easy installation. The conduit less than de32mm can be easily cut off by pipe cutter. Inserting relevant special spring into conduit, it can be bent into needed angle under normal temperature. Pipeline meeting the construction shape will be formed to connect conduits with PVC adhesive.
◎ Saving investment:compared with steel tube,construction costs of PVC conduits can be greatly reduced in material and installation.
Specification of PVC electrical conduits
| Nominal Size（mm） | Outside diameter（mm） | Mean outside diameter （mm） | Minimum inner diameter（mm） | （mm） Minimum wall thickness of rigid conduit | Metric thread | Conduit lenth L(M) | ||
| Rigid conduit | Felxible and threaded conduit | Rigid conduit | Felxible and threaded conduit | |||||
| 16 | 16 | -0.3 | 12.2 | 10.7 | 1.0 | M16*1.5 | 4+0.005 Base on transportation and engineering requirements | 25-100 |
| 20 | 20 | -0.3 | 15.8 | 14.1 | 1.1 | M20*1.5 | ||
| 25 | 25 | -0.3 | 20.6 | 18.3 | 1.3 | M25*1.5 | ||
| 32 | 32 | -0.3 | 26.6 | 24.3 | 1.5 | M32*1.5 | ||
| 40 | 40 | -0.3 | 34.4 | 31.2 | 1.9 | M40*1.5 | ||
| 50 | 50 | -0.3 | 43.2 | 39.6 | 2.2 | M50*1.5 | ||
| 65 | 63 | -0.3 | 57.0 | 52.6 | 2.7 | M63.1.5 | ||
| Item | Rigid conduit | Felxible and threaded conduit | parts | ||
| Appearance | smooth -（0.1+0.1A）≤ΔA≤0.1﹢0.25 | smooth -（0.1+0.1A）≤ΔA≤0.1﹢0.25 | Smooth ,no crack | ||
| Maximum outside diameter | Pass by gauge weight | / | |||
| Minimum outerside diameter | Pass by gauge weight | / | |||
| Minimum inner diameter | Pass by gauge weight | inner diameter not less than 10.7mm | / | ||
| Minimum wall thickness | Wall thickness not less than 1.0mm | / | |||
| Compression test | Loaded in 1min，Dt ≤25% Unloaded in 1min，Dt ≤10% | Loaded in 1min，Dt ≤10% | / | ||
| Impact test | At least 10 pcs is not bad ,no crack in 12 specimens | / | |||
| Bending test | No visible crack | no visible cracks, Pass by gauge weight | / | ||
| Flat lets | Pass by gauge weight | / | |||
| Drop strength | no broken ,no shattered | no broken ,no shattered | |||
| Heat resistance | Di≤2mm | gauge by weight | Di≤2mm | ||
| Flame retardant test | self-extinguished time | Te≤30s | Te≤30s | ||
| Oxygen Index | OI≥32 | OI≥27 | OI≥32 | ||
| Electrical performance | no breakdown within 15min R≥100MΩ | no breakdown within 15min R≥100MΩ | |||
- Q: What is the essential difference between silicone tube and rubber tube?
- Silicone tube 100% non-toxic, tasteless, fine silk, silicone silicone tube (article), high pressure resistant silicone tube, silicone tube, gear shaped sealing strip, shaped article, food grade (non-toxic) silicone tube (article), medical silicone tube, silicone tube, silicone tube medicinal woven (used for conveying working pressure, liquid food, pharmaceutical and biological products. ) medical silicone pipe joint, silica gel sealing tube, flame retardant tube (strip), silica gel foamed pipe (strip), high temperature resistant silicon rubber tube, performance: cold resistance, high temperature resistance. Harmless non-toxic and tasteless; suitable for small household appliances (coffee pot, kettle, electric iron, electric cooker, frying pan, disinfection cabinet, drinking machine, pulp machine, bread machine, gas cooker, water heater) and electronic, automobile, medical and other mechanical products.
- Q: My company does high-quality rubber tube, all of the core method, and why use EPDM to do the inner tube, it is difficult to take off the core, please point out! What's the reason?
- The core needs to be removed, and if it is too long, the mandrel can be divided into two sections and separated from the 2 sides
- Q: HDPE double wall corrugated pipe joint shall be made of elastic sealing rubber ring and socket joint interface. What are the requirements for rubber ring joint?
- When the interface is made, the inner wall of the bearing mouth is cleaned first, and the lubricant is coated on the inner wall of the socket and the rubber ring of the socket, and then the central axis of the socket face end is aligned.
- Q: What are the main differences between stainless steel flexible joint and rubber soft joint?
- Stainless steel soft joint and rubber flexible joint are used as flexible components to absorb vibration and noise.
- Q: Aging of natural gas pipeline
- 1, when in use, should always pay attention to the color of the fire. Orange flames indicate incomplete combustion of gas, and in this case carbon monoxide is released. The fire can be adjusted by adjusting the air door at the bottom of the stove, and the flame is blue.2, soup or water, containers should not be overfilled, nor unattended, so as to avoid the fire was spilled soup, water and water leakage.3, in a stew or soup, some people love the flame was very small, this can easily lead to leakage or incomplete combustion. Therefore, in the use of gas stoves, the fire can not be too small.Between the 4, and gas appliance hose inlet connector to connect closely, preferably with a pipe clip.5, in the same room, strictly prohibit the simultaneous use of two kinds of fire sources.6, the family is best equipped with dry powder fire extinguishers, so as to be prepared.
- Q: The difference between silicone tube and rubber tube
- Silicone hose is the biggest feature of resistance to temperature changes of -60 degrees to 250 degrees, but the cost is very expensive, no requirement for the hose. Compression resistant silicone hose resistant to pressure can also be.
- Q: Faucet hose connection problem
- The buried water pipe is outside the wire, you can use the inner home angle valve. When installing, pay attention to the rubber ring in the metal hose. The gasket should be put away. It is better to buy the transparent rubber ring and the metal hose of that kind of gasket, and pay attention to the length.
- Q: How to identify the quality of rubber pipes for sewage treatment?
- The general hose inside and outside the adhesive layer material with natural rubber, styrene butadiene rubber or butadiene rubber; hose with chloroprene rubber, nitrile rubber; acid and alkali resistant, high temperature resistant hose with ethylene propylene rubber, fluorine rubber or silicone rubber etc.. Structure: hose structure is usually divided into inner layer, outer layer and skeleton layer (or middle layer). The inner layer directly bears the abrasion and erosion of the conveying medium; the outer rubber layer protects the inner part of the hose from the damage and erosion of the external environment; the stock price is the pressure bearing layer of the rubber tube, and gives the strength and rigidity of the tube body. The working pressure of the hose depends on the material and structure of the skeleton.
- Q: Difference and application of rubber joint and rubber expansion joint
- Because the material of rubber expansion joint is higher than the price of ordinary rubber, the price of rubber expansion joint is naturally higher than that of our common rubber joint. The so-called "one point price", "goods", the user in the choice of rubber expansion Festival at the same time, must be based on the use of media to select materials. High quality rubber expansion joints are usually made of butadiene styrene rubber, while SBR is the earliest synthetic rubber. Because it is developed with reference to natural rubber.
- Q: What with the appropriate suction tube Dichotomanthes tube and rubber machine
- The spiral tube called spiral steel tube or spiral welded pipe, the low carbon steel or low alloy structural steel strips in a helical line certain angle (called forming angle) rolled into a tube, then the tube welding seam made up, it can be used in narrow strip production of large diameter steel pipe spiral pipe is mainly used in oil.
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PVC-U electrical insulation conduits and fitting in buildings
- Ref Price:
-
- Loading Port:
- Qingdao
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 500 m
- Supply Capability:
- 5000 m/month
OKorder Service Pledge
OKorder Financial Service
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