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一 管材和管件连接 Tubing and administer a connection
1 所有管道端面必须加工平齐，并与管道中心线垂直。
2 采用碰焊连接的管道必须开坡口，碰焊管件厚度2~8mm，坡角为a=85-75°，管件厚10~20mm，坡角为a=75-65°具体形式见图：
3 对于承插连接的管子与管件，承心内侧应有1/32锥度。
4.法兰端密封面与管子中心线垂直偏差0~1°，法兰连接端的密封面的不水平度应小于0.3mm，承心的垂直偏心度应小于1mm。
5.法兰与法兰管件连接，配合面间应加密封垫片。
6.配件与配件间采用螺丝连接的，螺丝松紧程度应基本一致。
1.All pipe end face must process calm down neat,And with pipe camber line plumb.
2.Adopts touch weld copular pipe must open slope,Will touch weld administer a thickness 2~8mm,Slope corner for a=85-75°,Tubing will be thick 10~20mm,Slope corner for a=75-
65°concrete form see picture.
3.Towards bearing inserts copular pipe and administer,Dues 1/32 Zhui dus inner bearing heart.
4.Flange will hold dense cover with pipe camber line plumb deflection 0~one°,Flange connects hold’s seal up microbus not level degree should be less than 0.3mm,Bearing heart’s plumbs prejudicial should be less than 1mm.
5.Flange with flange administers a connection,Cooperates with between should plus seal up shim.
6.Accessory with adopts screw copular between accessory,Screw segree of tightness extent basically unanimously.
二 管道安装 Pipe installation
1 塑料管道安装时，应考虑环境温度对安装质量的影响，一般气温高于40℃或低于0℃时，不宜施工安装。
2 由于塑料管道线膨胀系数大，一般为钢材8倍左右，在安装时要考虑热补偿，一般以自燃补偿为主，也可采用聚四氟乙烯波纹膨胀节进行补偿，或橡胶补偿器。
3 对于架空敷设的管道应采用管托支撑，管托可用角钢，对剖的钢管材料，使管道在托管上能自由伸缩，管线支架距离见下表
4 对于埋地敷设的管道一般埋没深度为0.7米以下，并要不受地面交通的影响，所挖的管沟应平整，沟底及两侧的石块、碎砖、玻璃等坚硬物清楚干净。复土使用高质量的回填土，将管子周围填土密实，不应参有碎石。
1.Plastic pipe installation time,Should consider environmental temperature to install quality’s affection,Ordinary will be temperature higher than 40℃or under0℃time,Should not Construction installation.
2.Because plastic pipe lineal expansion coefficient big,Ordinary for steel products 8 time about,At installation time want consideration caloric compensation,Ordinary as self ignition compensation give first place to,Also can adopt forgather four fluorine ethylenes ripple bloat section proceed compensation,Or rubber equalizer.
3.Towards overhead laying’s pipe should adopt administer hold in the plam sustain.Administers hold in the palm useable angle steel,To cuts open’s steel tube material,Makea pipe at administer hold in the palm on can since.By flex,Pipenline bracket distance see under watch.
4.Towards buries field laying installation’s pipe ordinary cover up depth for 0.7 metre below,Ands otherwise incur surface transportation affection,Digs’s administer ditch should neat,And bilateral stone bottom ditch,Brickbat,Glass firm thing brightness neatness.Again soil use high-quality’s backfill soil,Will fill up soil closely knit surrounding pipe,not dose shoud ooze have detritus.
三 焊接工艺要求 Welding process requests
1 焊接材料与管道材料必须相同
2 焊接温度，聚丙烯210~230℃，聚乙烯195~210℃（具体情况根据室外温度而定）。
3 管道焊接处必须清洁干净。
4 焊缝表面应平整，不准有波纹形及焊缝弯曲现象。
5 焊条排列应紧密，不准有空隙。
6 焊条和管材及管件必须处于同时熔融状况进行焊接，但不应有烧焦或分解现象。
7 焊条应垂直焊缝并略施加一定作用力，知道焊条与制品熔接为止。
1.Welding rod material with pipe material must same.
2.Welds temperature,Polypropylene will be 210~230℃,Polyethylene will be 195~210℃.
3.Pipe welds place must clean.
4.Brazing seam surface should neat,Nots permit have slop lines shape and brazing seam bended phenomenon.
5.Welding rod alines should tightness,Not permit free crack.
6.Welding rod and tubing and administer must be in meanwhile melt status proceed weld,But not does due burn burner or anglyse phenomenon.
7.Welding rod should plumb brazing seam and slightly exert certain action and reaction,Tills welding rod with ware melt meet up to.
四 聚丙烯在各种温度下的允许使用压力
Polypropylene’s permit use pressure under all sorts of temperature |
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