电气预埋规范.doc

电气埋管施工工艺细则Electricalconduitconstructiontechnologyrules严禁使用电焊、气焊割管。Strictlyprohibitedinusinggasandelectricweldingcuttingconduit.严禁将脚手架作为电缆管使用。Strictlyprohibitedinusingthefolderaselectricalconduit.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。Existseriouscorrosionconduitisnotallowedused;themouseoftheconduitastheinnerpartthedebrismustberemovedbeforebendingorinstallation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。Cuttingfortheconduitadoptinginmanualsawormachine,andensurethecuttingsurfacesmoothandnottilt;burringaftercuttingmustbeimmediately,andpolishedtypenozzleintohorn.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）。BendingradiusR≥10D(hereDisconduitoutdiameter);BendingAngle≥90°,andaslessaspossiblethe90°elbow;conduitbendingcannotappearobviousconcave,crack,wrinkle,flatsteeltubebendingflatlevel≤0.1D(hereDisconduitoutdiameter).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。Wheninstallationconduit,theamountofeachconduitelbowshallnotexceed3,elbowwith90°shallnotbemorethan2；theconduitlength≥12m,shallnotbemorethantwoelbow;Thelengthoftheconduitthatchangedbetween8mand12m,shallnotbemorethanthreeelbow;straightshallnotbemorethan30meters；Ifexceedthestandardmorethanthestandardmustincreasethetransferbox.7．电缆管连接不得对接焊，必须采用短套管；套管长度≥50mm；whenconduitconnectionashortsocketmustbeused，andnobuttwelding（exceptspotwelding）；thelengthofthesocketmorethan2timesofconduitoutdiameter.电缆管型号Type壁厚（mm）Thickness电缆管外径（mm）Outdiameter.连接套管内径（mm）Socketinnerdiameter连接套管的长度（mm）LengthDN253.2533.535≥50mmDN323.2542.343≥50mmDN503.56061≥50mmDN8048889≥50mm8．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；Whencoupling,thereshouldn’tgapbetweenthetwoconduitandthecounterpartmalocclusionislessthan2mm,counterpartseamshouldbeinthemiddleofthesocket,andthebothsidesalongthecircumferentialweldingsealing,partialcannotweldingmustuseblacktapewindingsealingwithfastenedironwire;9．电缆管不得在外壁直接点焊加固，加固采用铁丝绑扎或煨制钢筋成环钩