1金属管道安装问题和有效的防治对策 1.1现象 主要包含以下几个方面：

1 Metal pipe installation problems and effective prevention and control measures <br><br>1.1 The phenomenon <br><br>mainly includes the following aspects: ① Due to the unevenness of the nozzle of the saw pipe, there are a large number of threading and random buckles; ② The length of the nozzle entering the box or box Not the same; ③There are too many burrs on the nozzle; the bending radius of the pipe is too small, and it is easy to appear flat, cracks and other undesirable phenomena. <br><br>1.2 Reasons <br><br>In fact, the reasons for the above-mentioned metal pipe installation phenomenon come from many aspects: ①The height of the saw pipe nozzle is uneven, which is caused by the construction staff's hacksaw not being vertical or placed incorrectly during the operation; The threading disorder is caused by not putting a certain amount of lubricating oil in time; the distance between the nozzles into the box or in the box is different, because the cup and comb are not fixed outside the box; ②There are a lot of burrs in the saw cut of the electrical pipe ③No retaining ring is used for fastening at the nozzle; ④The connection between the nozzle and the nozzle is not dense enough; ⑤The metal pipe is damaged when the interior is decorated. <br>1.3 Preventive measures <br><br>①Before cutting metal pipes, fix the metal pipes first. Especially when sawing pipes, make sure that the person must stand straight, and the angle between the hacksaw arm and the operator's body is 90°, and the hand-held hacksaw must always be stable. Only in this way can a relatively flat nozzle be sawn. If there are still burrs, use a round file to make the nozzle smoother. ②When the metal pipe is simmering, it can be calibrated with a shaped simmering device. However, it is necessary to ensure that the diameters of the simmering device and the metal pipe match each other. If the groove width is large, the metal pipe diameter is likely to be flattened. In turn, a large amount of concrete mortar will flow into it, and it will even block the pipeline. This will inevitably cause the power cord to not pass through smoothly. Therefore, it is best to set the welding seam of the pipe to one side. When dealing with the bending phenomenon, the pipe simmering device should be moved backward gradually, and the force should be very uniform. If the diameter of the metal pipe is more than 25mm, it is best to use a separate hydraulic pipe simmer. At the same time, the minimum bending radius should be 6 times the pipe diameter. ③When there is a disorderly threading phenomenon, the main reason is that the lubricating oil is not applied in time, which causes the pipe and the pipe connection to be insufficiently dense, and mortar enters, which causes the pipe diameter to gradually become smaller. ④ The pipeline installation should be carried out in strict accordance with the construction drawings to avoid damage to the pipeline construction caused by other construction work types.

1 Metal pipe installation problems and effective prevention and control measures<br><br>1.1 Phenomenon<br><br>Mainly contains the following aspects: (1) due to the saw pipe pipe is uneven, so there is a large number of wire buckle phenomenon; (2) the length of the tube port into the box or box is not the same; (3) there are more burrs in the mouth of the tube; The bending radius of the tube is small, and it is easy to appear flat, cracks and other undesirable phenomena.<br><br>1.2 Reason<br><br>In fact, the above-mentioned metal pipe installation phenomenon is caused by a variety of reasons: (1) saw pipe mouth is uneven, is due to the construction workers in the course of operation, because the saw is not vertical or placed correctly caused; The set of silk buckle is due to the failure to put a certain amount of lubricant in time; The distance between the tube port into the box or the box is not the same, because outside the box, not fixed with a cup comb; (2) There are a large number of burrs in the sawn-off of electrical pipes; (3) no ring is used at the tube port for fastening; (4) the connection between the tube port and the tube port is not dense enough; (5) Damage to metal pipes when renovating the interior.<br> 1.3 Preventive response<br><br>(1) Before cutting the metal pipe, the metal pipe should be fixed. Especially when sawing, make sure that the person must stand up straight, while the angle between the saw arm and the operator's body is 90 degrees, hand-held saw to always maintain a smooth, only in this way, can see out a more flat pipe. If there are still burrs, the tube mouth can be made more sleek with a round crucle. (2) When the metal pipe bends, it can be applied to the shape of the tube to correct, however, to ensure that the diameter of the pipe and the metal pipe to match each other, if the width of the groove is large, then it is likely to make the metal pipe diameter bending phenomenon, and thus make a large number of concrete mortar into it, and even block the pipe, so that the power cord will inevitably not pass smoothly. Therefore, it is best to set the pipe weld to one side, in dealing with bending phenomenon, to gradually move the tube to the rear, and the force should be very uniform. If the diameter of the metal pipe is more than 25mm, then it is best to use a separate hydraulic tube, at the same time, the minimum bending radius should be 6 times the diameter of the pipe diameter. (3) when the wire buckle phenomenon, the main reason is not timely application of lubricants, resulting in pipe and pipe connection is not dense enough, there will be mortar into, resulting in the pipe diameter gradually become smaller. (4) Pipeline installation should be carried out in strict accordance with the construction drawings, to avoid other types of construction damage to pipeline construction.

1. Metal pipeline installation problems and effective prevention countermeasures<br>1.1 phenomenon<br>It mainly includes the following aspects: ① due to the uneven nozzle of the SAW pipe, there is a large number of disorderly threading phenomenon; ② the length of the nozzle into the box or box is not the same; ③ the burr of the nozzle is too much; the bending radius of the pipe is too small, which is prone to flat, cracks and other bad phenomena.<br>1.2 reasons<br>In fact, the reasons for the above-mentioned metal pipe installation phenomenon come from many aspects: ① the uneven pipe orifice of the SAW pipe is caused by the construction personnel in the process of operation, because the hacksaw is not vertical or is not placed correctly; the disorderly thread setting is caused by not putting a certain amount of lubricating oil in time; 2; The distance between the pipe mouth and the box is not the same, because the cup comb is not used to fix it outside the box; ② there are a lot of burrs in the electric pipe saw; ③ there is no retainer to fasten the pipe mouth; ④ the connection between the pipe mouth and the joint of the pipe mouth is not dense enough; ⑤ the metal pipe is damaged when the indoor decoration is carried out.<br>1.3 preventive measures<br>① Before cutting the metal pipe, the metal pipe should be fixed first. Especially when sawing the pipe, make sure that the person must stand straight, and the angle between the arm of the hacksaw and the operator's body is 90 degrees. The hand-held hacksaw should always be stable. Only in this way can a relatively flat pipe orifice be cut. If there is still burr, a round file can be used to make the nozzle smoother. ② When the metal pipe is bent, it can be corrected by the fixed type pipe bender. However, it is necessary to ensure that the diameters of the pipe bender and the metal pipe match each other. If the groove width is large, the metal pipe diameter is likely to be bent flat, and then a large amount of concrete mortar will flow into it, and even the pipe will be blocked. In this way, the power line will not pass through smoothly. Therefore, it is best to set the pipe weld to one side. When dealing with the bending phenomenon, the pipe simmer should be moved to the rear gradually, and the force should be very uniform. If the diameter of the metal pipe is more than 25 mm, it is better to choose the separated hydraulic pipe simmer, and the minimum bending radius should be 6 times of the pipe diameter. ③ The main reason is that the pipe and pipe joints are not dense enough due to the untimely application of lubricating oil. Mortar will enter into the pipe and the pipe diameter will gradually become smaller. ④ The pipeline installation shall be carried out in strict accordance with the construction drawings to avoid damage caused by other construction types.<br>