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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Item specifice
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: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:In long-term high temperature environment, silica gel tube and three yuan ethylene propylene rubber hose which is good durability?
- Silicone hose is relatively soft, flexible, and looks better than other rubber tube gloss, color is mostly red, blue, translucent and other colors.
- Q:What is the maximum pressure that a hose can bear?
- The working pressure of general industrial hydraulic high pressure hose is about 35MP, and the bursting pressure can reach 60mp. It doesn't make any sense because there is no higher hydraulic pump that can work above 35MP.
- Q:What does the letter of the high-pressure tubing connector mean?
- Purpose: high pressure tubing tubing steel wire spiral reinforced layer and wear resistant synthetic rubber composition used for conveying high pressure, engineering machinery hydraulic oil, gas, petroleum, submarine irrigation, steel mills, chemical plants and other media.
- Q:What are the gas hoses?
- Go straight to the gas.There are 2 kinds of gas hose: one is made of black rubber thickened tube, and the other is stainless steel hose.Stainless steel hose is better, more than 10 years of life. Basically don't use it.Rubber life of 1 and a half years, 2 years later aging brittle, need to change.
- 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?
- Hose core need special tooling, EPDM mandrel and rubber vulcanized rubber tube together will produce covulcanization phenomenon, easy to produce adhesion, so need special disposal to complete stripping, and should adopt non core industrial processing, I is a professional manufacturer of automobile rubber tube there is not clear I can ask each other AC.
- Q:How can the soft joint of the pipe be elongated during use?
- Do not pay attention to the daily maintenance of pipeline flexible joint, because pipeline flexible joint is composed of a natural rubber and other synthetic rubber formula made in accordance with the proportion, because from the ultraviolet irradiation, the sun is long time exposure, the surface deformation or cracks, and maintenance method has two kinds, one is a surface covering a layer of sunscreen, no requirements of the network, as long as they can block the direct sunlight, the second method is talcum powder on the surface of the rubber joint, but also need to be covered with direct sunlight to place.
- Q:How can the tightness of rubber tube and metal pipe joint be ensured?
- See how much your pipe diameter, diameter is around 10%, the metal pipe is inserted into the 2-3 rubber tube diameters, almost, don't worry, coupled with a hose clamp.
- Q:Why does Br2 corrode rubber tubes?
- Bromine elements need to be sealed with water to prevent steam escaping and harm the human body. Oxidizing, there are a variety of variable valency, under normal temperature and weak water reaction, generating hydrobromic acid and bromate. Heating increases the speed of reaction. Hydrobromide is a strong acid with an acid stronger than that of hydrogen chloride. Bromine is commonly used in organic synthesis.
- Q:Latex tube, rubber tube, silicone tube, which three of the best tightness?
- Rubber tightest is butyl rubber, rubber pipe products in general, with no fiber layer, expanding 300-500% is no problem, you can put it into the glass tube, depends on the strength of the glass tube and technique.
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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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