电气预埋规范及电气硬件安装接线标准.docVIP

电气埋管施工工艺细则 Electrical conduit construction technology rules 严禁使用电焊、气焊割管。 Strictly prohibited in using gas and electric welding cutting conduit. 严禁将脚手架作为电缆管使用。 Strictly prohibited in using the folder as electrical conduit. 3. 锈蚀严重的钢管不得使用；钢管弯制或安装前应将管口及管内杂物清扫干净，并除去毛刺。 Exist serious corrosion conduit is not allowed used; the mouse of the conduit as the inner part the debris must be removed before bending or installation 电缆管切割采用手工锯或切割机进行切割，并保证切割面平整且不倾斜；切割后必须立即将管口毛刺打磨干净，并打磨管口成喇叭型。 Cutting for the conduit adopting in manual saw or machine, and ensure the cutting surface smooth and not tilt; burring after cutting must be immediately, and polished type nozzle into horn. 电缆管的弯曲半径R≥10D（电缆管外径）；弯曲角度≥90°，并尽可能减少90°弯头；电缆管弯制不得出现明显的凹瘪、裂纹、折皱 ，钢管弯扁程度≤0.1D（电缆管外径）。 Bending radius R ≥ 10D (here D is conduit out diameter);Bending Angle ≥90 °, and as less as possible the 90 °elbow; conduit bending cannot appear obvious concave, crack, wrinkle, flat steel tube bending flat level ≤0.1 D (here D is conduit out diameter). 6．电缆管安装时，每根电缆管弯头数量不得超过3个，90°弯头不得超过2个 （埋管长度≥12米，不得多于2个弯头；12米≥埋管长度≥8米，不得多于3个弯头；直管埋设不得大于30米）超过上述标准须增加转接盒。 When installation conduit, the amount of each conduit elbow shall not exceed 3, elbow with 90 °shall not be more than 2；the conduit length ≥12m, shall not be more than two elbow; The length of the conduit that changed between 8m and 12m , shall not be more than three elbow; straight shall not be more than 30 meters； If exceed the standard more than the standard must increase the transfer box. 7．电缆管连接不得对接焊，必须采用短套管；套管长度≥50mm； when conduit connection a short socket must be used，and no butt welding（except spot welding）；the length of the socket more than 2 times of conduit out diameter. 电缆管型号 Type 壁厚（mm） Thickness 电缆管外径 （mm） Out diameter. 连接套管内径（mm） Socketinner diameter 连接套管的长度（mm） Length DN25 3.25 33.5 35 ≥50mm DN32 3.25 42.3 43 ≥50mm DN50 3.5 60 61 ≥50mm DN80 4 88 89 ≥50mm 8．电缆管连接时,先将套管中间凸台毛刺打磨干净，然后将电缆管插入套管中，电缆管与凸台之间不得留有间隙；连接套管与电缆管两侧均匀电焊4点，并用黑胶布缠绕封实； When coupling, the