The metal threading pipe is a metal pipe which protects the electric wire line under strong acid, strong alkali and strong corrosive environment, and has good acid resistance, alkali resistance and corrosion resistance, and is a metal pipe commonly used in industry. Let's take a look at how the metal conduit is constructed.
(1) The cutting of the JDG pipe shall be cut by a toothless saw or a hacksaw, and the port shall be smooth and free of burrs.
(2) When the JDG pipe is laid dark, the bending radius should not be less than 6 times the outer diameter of the pipe. In the concrete plane, the bending radius should not be less than 10 times the outer diameter of the pipe; when the JDG pipe is laid, the bending radius is not Should be less than 6 times the outer diameter of the tube. When there is only one bend between the two junction boxes, the bending radius should not be less than 4 times the outer diameter of the tube.
(3) When the JDG tube is darkly coated, the fixed point spacing is not more than 1000mm, the fixed point distance from the elbow, the junction box and the terminal spacing should be greater than 150mm, and less than 300mm.
(4) When the JDG metal threading pipe is buried in the wall or concrete, the clearance between the pipe and the wall or concrete surface shall not be less than 15mm.
(5) When the sleeved tight steel pipe is laid, the specifications of the bracket and hanger shall not be less than round steel when there is no design requirement: diameter 6mm; flat steel: 30mm*3mm: angle steel: 25mm* 25mm*3mm regulations.
(6) The pipe into the box (box) should be one pipe and one hole. The pipe diameter should be matched with the box (box) knockout hole. It is forbidden to open the hole. When piping into the box (box), the arrangement should be neat, the spacing should be even, and the box (box) should be flush with the wall.
(7) After the piping is completed, in order to prevent foreign matter from entering the tube, the end should be sealed.
(8) When pouring concrete, it should be monitored by electrician to prevent the pipeline and junction box from being shaken and displaced.
(9) After the template is removed, the pre-sweep should be carried out in time. The pipe should be fixed on the line.
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1, the selection of goggles should be selected by the product inspection agency inspection of qualified products;
2. The width and size of the goggles should suit the user's face shape;
3, lens wear rough, lens frame damage, will affect the vision of the operator, should be replaced in time;
4. Goggles should be specially used to prevent eye diseases;
5, the filter and protection of welding goggles should be selected and replaced according to the requirements of the specified operation;
6. Prevent heavy fall and heavy pressure, and prevent hard objects from rubbing lenses and masks.
Two types of use of safety protective glasses:
A. Anti-cementing debris
Mainly used to prevent metal or sand debris and other mechanical damage to the eyes. Lenses and frames should be of solid construction and resistant to impact. The frame of TDAF001 sky shield is equipped with a shielding edge, and there shall be ventilation holes on it. Protective lens can choose toughened glass, adhesive glass or copper wire mesh protective lens.
B. Antichemical solution
Mainly used to protect the eyes from chemical damage caused by irritating or corrosive solutions. Ordinary flat lens can be used, and the frame should be covered to prevent the solution from splashing into. Usually used in laboratories, hospitals and other places, general medical glasses can be universal
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