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: How can the rubber joint be classified according to the range of temperature?
- Temperature resistance, suitable for operating temperature above 80 degrees in the transmission pipeline. Special rubber flexible joint is suitable for special pipeline system in the environment of oil, ozone, strong acid and alkali.
- Q: What is the principle of communicating devices? What if the rubber tube is used as a connecting device to change the water for the fish?
- Siphon principle: that is the principle of connected devices, plus in a closed container, the pressure on the liquid, everywhere equal. The siphon is filled with water, there is no gas, the water level of the water inlet is high, and the water outlet is closed with palm or other objects. The pressure is equal everywhere. When all are arranged, the water outlet is opened, although the atmospheric pressure on both sides is equal, the water level at the water inlet end is high and the pressure is large, and the water inflow is continuously flowed out of the water outlet.
- Q: The function of rubber joint?
- The utility model has the advantages of small size, light weight, good elasticity, convenient installation and maintenance
- Q: What is the essential difference between rubber expansion joint and rubber joint?
- The expansion joint is also called expansion device, expansion joint and compensator. It is divided into several types, such as ripple compensator, sleeve compensator, rotary compensator and square natural compensator, and also has intubation type expansion joint. Among them, the corrugated compensator is more commonly used, mainly to ensure the safe operation of the pipeline, and has the following functions: 1.. Compensating the axial, transverse and angular thermal deformation of the absorption pipeline. 2. vibration absorption equipment to reduce the impact of equipment vibration on the pipeline. The deformation of the pipeline 3., absorption of seismic subsidence.
- Q: Is flexible rubber joint and telescopic device a kind of thing?
- The main features of metal pipe telescopic device are telescopic, large compensation and high temperatureUnder great pressure.And flexible rubber joint is a product!
- Q: What are the materials used in rubber joints? What are their advantages?
- Ordinary air, compressed air, water, sea water, hot water, weak acid, strong alkali, temperature between -20 ~ +115, such as the media with ordinary natural glue can
- Q: Is the metal hose the same as the soft connection?
- Some places are a term, but there are also soft connections, non-metallic soft connections, metal soft connections, so it's better to ask what you want
- Q: How often do the oil - resistant rubber pipes undergo atmospheric pressure testing?
- Hose size measurement: the inner and outer diameter, outer diameter, wall thickness, enhancement layer concentricity, inner and outer layer of glue thickness, assembly diameter, new GB and ISO increased the length and the measuring point mark, provides no pipe joint and a hose length of various pipe joint measurement method.
- Q: Do you know the inner diameter of the hose for household shower hose is the same? Can different brands of shower and hose mix?
- Yes, it's easy to have this problem with sprinkler tubes. Because the hose and shower head inside and outside the effective length of the difference between the thread is too large, resulting in gaskets did not play a role in sealing, multi pad 1-2 pads can be, the gasket can be purchased at the hardware store to buy
- 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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