What Is Electrical Metallic Tubing?

Metal pipe is also called iron direct, which is a kind of electric material. It is made of high-quality pipes and is protected by double-sided galvanization for pipe-to-pipe connection. There is a rolling positioning groove in the middle of the pipe joint. The taper formed allows the catheter to be inserted tightly and is tightly sealed. The mortar and even the water do not easily enter the catheter when it is covered, and the depth of the groove is flat with the inner wall of the catheter Smooth and does not affect threading.

There are one (two above 32) tapped screw holes near the two ends of the pipe joint. The length of the threaded holes is greater than the thickness of the pipe joint wall. , The increased number of thread turns makes the tight connection more reliable. The set screw is specially made, the tightening end is hexagonal with a "+" slot, and the other end is socket-shaped. Close the set screw and tighten it until the "neck" is broken, so that the catheter and the joint are integrated. No need to cross the ground wire. There are six specifications for use with the corresponding catheter. ^[1]

(1) High joint strength: according to steel

By screwing the union nut onto the connection part, the

(1) Before connecting, screw the pipe fittings by hand to check the tightness of the pipe threads. After being screwed on by hand, the pipe thread should have sufficient assembly margin for tightening, otherwise the thread cutting amount should be adjusted when selecting suitable pipe fittings or machining threads.

(2) The packing and the pipe fittings should be wound correctly.

The packing should be wound tightly and evenly around the external thread clockwise, and the packing should be filled into the thread gap when the pipe is installed, and the packing must not be squeezed out. Use suitable pipe wrenches to make the threaded connections tight and firm. The thread should be tightened once and should not be reversed. After screwing, the screw root should have an exposed screw tail.

(3) After the screw connection, visual inspection should be performed to remove exposed linseed. The damaged galvanized layer should be treated with anticorrosion. It can be coated with antirust paint twice and then silver powder.

(4) Non-galvanized pipe fittings shall not be used for galvanized steel pipe thread connection, and galvanized steel pipes shall not be welded. ^[3]