Let's look at three common electrical conduits:
1, buckle thin-walled steel pipe (KBG pipe
2. Fasten the thin-walled steel pipe (JDG pipe)
3. Welded steel pipe (stainless steel pipe)
A, KBG pipe requirements are as follows:
(1)KBG is a snap-in galvanized thin-walled conduit, and its connection is to press the pipeline and pipe fittings out of a small pit with snap pliers and connect them closely.
(2) The catheter shall be marked with brand, model, outside diameter, standard number, manufacturer, etc. And should have certain anti-counterfeiting marks.
(3) The inner and outer walls of the catheter are smooth without obvious defects such as bubbles, cracks and uneven colors; There are no ridges and similar defects on the inner and outer surfaces; The edge of the nozzle is smooth, which does not damage the insulation layer of wire and cable; The inner and outer walls of KBG steel pipes shall be galvanized, which shall be bright, uniform, undamaged and free from falling off.
(4) The wall thickness and inner and outer diameters of the pipeline shall be uniform.
(5)KBG tube wall thickness KBG tube wall thickness is related to tube size. There are also 1.2 and 1.0 greater than 1.6. KBG tube is an upgraded product of SC tube. In many cases, both of them can be used as kbg pipes for power distribution and weak current pipes for civil air defense and fire fighting. In particular, the KBG pipeline entering and leaving the civil air defense protection zone requires a wall thickness of not less than 2.5 mm The KBG socket-type electric cooling galvanized steel conduit is made of high-quality cold-rolled strip steel, which is welded by high-precision pipe welding machine with high frequency and double-sided galvanized protection. The wall thickness is uniform, the weld is smooth, the edge of the nozzle is smooth and burr-free, and threading is safe and fast.
(6) Replacing thickness with light, which effectively reduces the engineering cost, is convenient to carry, has smooth internal weld, good fire and electric shock resistance, good shielding performance and anti-interference performance, and can be used for communication, control and network integrated wiring. Products are divided into kbg galvanized white tubes and kbg galvanized color tubes.
Second, the JDG pipe requirements
1, JDG pipe (socket sealed galvanized steel pipe and rigid metal flat conduit for electrical installation) is a new type of conduit for protection circuit. The connecting sleeve and its metal accessories are conductor pipes composed of screw connection technology, and the connection depends on the top thread of the pipe fitting to tighten the pipe to achieve close connection. There is no need to do grounding, welding and wire sleeve, which is the best choice for the special protection pipeline of exposed and dark insulated wires.
2. Except that the wall thickness of 16 is 1.2, the wall thickness of JDG pipe JDG is 1.6.
3. Specification The external diameter of JDG pipe is16-50mm. ..
4, the characteristics of JDG tube:
(1) The model and specifications meet the design requirements, and the surface of the pipe has obvious product identification that does not fall off.
(2) The coating on the metal inner and outer walls is uniform and complete, without peeling and corrosion.
(3) The surfaces of the inner and outer walls of the pipe connecting sleeve and its metal accessories are clean, and there are no defects such as burrs, flash, sand holes, bubbles, cracks and deformation.
(4) The wall thickness of the pipe connecting sleeve and its metal accessories is uniform, the edge of the nozzle is smooth and flat, the set screws meet the product design requirements, and the threads are neat, smooth and well matched.
(5) The wall thickness and inner and outer diameters of the pipeline shall be uniform.
(6) Socket-type galvanized steel conduit (JDG conduit) is a replacement product that replaces various traditional wire conduits such as PVC pipes and SC pipes, and it is a breakthrough innovation in the field of building electrical appliances using materials and new technologies. JDG conduit uses galvanized steel pipe and thin-walled steel pipe as jumper grounding wire instead of fusion welding connection. Metal conduit has the characteristics of complex construction, poor construction cost and high material cost. At the same time, PVC pipe is designed and manufactured for its disadvantages such as easy aging, poor fireproof performance and troublesome grounding, and it is a protector for wires and cables.