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塑料管道安装规范哪位了解？

塑料管道安装规范哪位了解？

浏览：38次 | 提问时间： 08-07 02:56

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凉冷暖自知 08-07 02:57

PVC（全名Polyvinylchlorid），主要成份为聚*乙*，另外加入其他成分来增强其耐热性、韧性、延展性等。这种表面膜的最上层是漆，中间的主要成分是聚*乙*，最下层是背涂粘合剂。PVC管（PVC-U管）硬聚*乙*管，是由聚*乙*树脂与稳定剂、润滑剂等配合后用热压法挤压成型，是最早得到开发应用的塑料管材。PVC-U管抗腐蚀能力强、易于粘接、价格低、质地坚硬，但是由于有PVC-U单体和添加剂渗出，只适用于输送温度不超过45℃的给水系统中。塑料管道用于输送饮用水，废水，化学品，加热液和冷却液，食品，超纯液体，泥浆，气体，压缩空气和真空系统的应用。pvc管安装施工规范（1）排水出户管的布置对系统的设计流量有很大影响。立管与排出管连接要用异径弯头，出户管最好比立管大一号管径，出户管应尽可能通畅地将污水排出室外，中间不设弯头或乙字管。许多工程已证实，较细的排水出户管及出户管上增加的管件会使管内的压力分布发生不利的变化，减少允许流量值并且在以后使用过程中易发生坐便器排水不畅现象。（2）pvc管排水系统为了保证螺旋管水流螺旋状下落，立管不能与其它立管连通，因此必须采取*的单立管排水系统，这也是采用UPVC螺旋管的特点之一。切忌画蛇添足，照搬铸铁管的排水系统，在高层楼增加排气管，若是增加了排气管，既浪费了材料，又破坏了螺旋管的排水特性。（3）与螺旋管配套使用的侧面进水专用三通或四通管件，属于螺母挤压胶圈密封滑动接头，一般允许伸缩滑动的距离均在常规施工和使用阶段的温差范围以内，根据pvc-u管线膨胀系统，允许管长为4M，也就是说无论是立管还是横支管，只要管段在4M以内，均不要再另设伸缩节。（4）管材的连接。pvc管采用螺母挤压胶圈密封接头。这种接头是一种滑动接头，可以起伸缩的作用，因此应按规程考虑管子插入后适当的预留间隙。避免施工中由于个别*作人员图省事，造成预留间隙过大或过小，日后随季节温度变化，管道变形引起渗漏。防止办法是先按照当时施工温度，确定预留间隙值。在每个接头施工时，先在插入管上做好插入标记，*作时达到插入标记即可。（5）在某些高层建筑设计中，为了加强螺旋管排水系统立管底部的抗水流冲击能力，转向弯头和排出管使用了柔性排水铸铁管。施工应将插入铸铁管承口的塑料管的外壁打毛，增加与嵌缝的填料的磨擦力和紧固力。（6）伸出屋面的通气管，因受室内外温差影响及*风雨袭击，经常出现通气管管周与屋面防水层或隔热层的结合部产生伸缩裂缝，导致屋面渗漏。其防止方法是可在屋面通气管周围做高出顶层150MM-200MM的阻水圈。（7）在埋地的排出管施工中常出现的两个问题：一个是室内地坪以下管道铺设未在回填土夯实以后进行。造成回填土夯实以后虽在夯实前灌水实验合格，但使用后管道接口开裂变形渗漏：另一个是隐蔽管道时左右侧及上部未用砂子覆盖，造成尖硬物体或石块等直接碰触管外壁，导致管壁损伤变形或渗漏。（8）室内明设pvc管道安装宜在土建墙面粉饰完成后连续进行。事实上由于工期原因，多数都是在主体结构完成后与装修同步进行。这样就会引起光滑美观的表面被污染，最好的解决办法是随着pvc-u螺旋管的安装及时用塑料布缠绕保护，待完工后去掉即可。再有，需要加强施工过程中的UPVC螺旋管道的成品保护，严禁在管道上攀登、系安全绳、搭脚手板、用作支撑或借作它用。地漏的水封地漏的顶面标高应低于地面5~10mm，地漏水封深度不得小于50mm。目的就是防止水封被破坏后污水管道内的有害气体窜入室内污染室内环境卫生。但是在给排水设计说明中很少有人提及，建设及施工单位为了降低造价使用市场上价格低廉的地漏，这种地漏水封一般不大于3厘米，满足不了水封深度要求。另外，居民装修房子时选用装修市场上的不锈钢地漏替代原来的塑料地漏，外表虽光亮美观，内部水封同样很浅。当排水时，地漏的水封由于正压（较低楼层）或负压（较高楼层）被破坏，臭气进入室内。好多居民反映家中有臭味，而且厨房排油烟机打开时更加严重，就是水封由于压力波动被破坏的原因。有的住宅厨房内设置了地漏，由于长时间没有补水，特别冬季供暖时水封容易干涸，应经常给地漏补水。建议设计施工时采用高水封或新型防返溢地漏。厨房内地面溅水少，可以不设置地漏。

大众女神经 08-07 03:05

您好，塑料排水管道常采用PVC材质，安装中，应注意管材的保护防止被重物挤压，磕碰，接口连接是使用同种原料的PVC粘结剂。管子及管件粘接面要擦拭干净，直接涂抹，均匀最好，涂抹好就合口连接，接口缝隙很小，所以多余单位粘结剂会被挤出，擦除即可。明装管道需要管卡固定，地埋管道需要填沙保护。注意粘结管件后，要稳固一下，防止接口粘结剂未干，接口退出。

我耀青春 08-07 03:13

pvc排水管安装规范标准：*标准 BS DD ENV 1452-6-2002。　　PVC排水管是以卫生级聚*乙*(PVC)树脂为主要原料，加入适量的稳定剂、润滑剂、填充剂、增色剂等经塑料挤出机挤出成型和注塑机注塑成型，通过冷却、固化、定型、检验、包装等工序以完成管材、管件的生产。1、无设计要求时，管道超过2米时应设置伸缩节，伸缩节间距最大不得超过4米。安装在立管上，层高小于4米的，应每层都设置，层高大于4米时，应根据管道设计伸缩量和伸缩节最大允许伸长量确定。2、伸缩节应该安装在靠近水流汇合管件处，如排水支管在楼板下时，伸缩节应加在靠近支管管件的下方。排水支管在楼板上时，伸缩节应加在靠近支管管件的上方。光是立管没支管的话任何位置都可以。

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