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:Can the copper tube of GREE air conditioner be changed into rubber tube?
- The refrigerant has a strong penetration capacity and can withstand high pressure. It doesn't mean the refrigerant doesn't run.When the air conditioner is refrigerated, the refrigerant oil is mixed together in the refrigerant and flows in the system. The freezing oil reacts with the rubber products and makes the rubber products rapidly aging and fail, unless the special rubber hose is purchased.
- Q:How should we distinguish between the silicone hose and the rubber tube?
- Silicone hose is relatively soft, flexible, and looks better than other rubber tube gloss, color is mostly red, blue, translucent and other colors. Others, such as three yuan ethylene propylene and nitrile rubber hose, are basically black.
- 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:Is the rubber pipe joint installed in the middle of the pipe and pump for shock absorption?
- A pump is a machine that transports liquids or pumps liquids. It will be the prime mover of the mechanical energy or other external energy transfer to the liquid, the liquid energy increase, mainly used to transport liquids including water, oil, alkali liquid, emulsion, suspension emulsion and liquid metal, but also transport liquid, gas mixtures and liquids containing suspended solids. Pump performance of technical parameters are flow, suction, lift, shaft power, water power, efficiency, etc.; according to the different principles of work can be divided into volume pumps, vane pumps and other types. Displacement pump is to use its studio volume changes to transfer energy; vane pump is to use the rotating blade and water interaction to transfer energy, there are centrifugal pumps, axial flow pumps and mixed flow pumps and other types.
- Q:How can the rubber tube be used properly and how to use it properly?
- The hose burst caused by frequent and severe pressure impact. This situation is not generally under the static pressure caused by too much, but the number and intensity and pressure impact. Engineering machinery in operation, will be repeated in the hydraulic tubing suddenly increased or decreased, which impact on the oil pressure of frequent the damage of the oil seal, resulting in increased, loosening hose leakage and rupture foaming and pipe joint. Therefore, in operation, the valve stem can not be too hard, must be gentle.
- Q:How much is a gas hose a metre? At least 1 meters, 5 safe?
- 1, liquefied petroleum gas will soften the ordinary rubber tube, please use special rubber tube.2, often check and clean hose, found aging, cracking, burn, rat worm bite marks, should be replaced immediately. It is recommended that the hose be replaced in two years under normal conditions.3, gas hose length of not more than 2 meters, after passing the place is not allowed to have electrical appliances.4, hose do not close to the stove surface, so as not to be flame barbecue.5, the hose does not cross the wall, doors and windows.6, do not press or fold the hose, so as not to plug, affecting the continuous gas supply.At the interface, and appliance, 7 hose valve, please use the pipe truss, to prevent the shedding of leakage.
- Q:How long is the service life of the gas hose?
- The gas hose is connected to the gas pipeline and special gas hose with / out, according to the number of gas accident statistics analysis, because the gas hose aging or bitten by rats caused by gas leakage accident / Xi accounted for more than 30% of all gas accident.
- Q:Access toilet water inlet hose joints, how to repair water?
- You try to put the connector aside, hold some force in the toilet hole, or add a person to press it with your hand, then swivel the pipe joint and maybe open it.
- Q:Excuse me, how can I get waterproof wires in the water?
- 35kV and below in low voltage cable joints if needed in the operation of the water environment, please do waterproof seal in the joints, joint can be orderly wound waterproof tape, heat shrinkable tube ends after heat shrinkable pipe shrinkage sealant, waterproof seal, installation conditions outside the FRP shell, shell insulation waterproof sealing glue perfusion. If the ordinary rain prevention, joints at both ends of the sealant after the root shrink heat shrinkable tube, heat shrinkable pipe mouth, waterproof belt, +PVC belt sealed!
- 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.
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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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