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一 管材和管件連接 Tubing and administer a connection
1 所有管道端面必須加工平齊，并與管道中心線垂直。
2 采用碰焊連接的管道必須開坡口，碰焊管件厚度2~8mm，坡角為a=85-75°，管件厚10~20mm，坡角為a=75-65°具體形式見圖：
3 對于承插連接的管子與管件，承心內(nèi)側(cè)應(yīng)有1/32錐度。
4.法蘭端密封面與管子中心線垂直偏差0~1°，法蘭連接端的密封面的不水平度應(yīng)小于0.3mm，承心的垂直偏心度應(yīng)小于1mm。
5.法蘭與法蘭管件連接，配合面間應(yīng)加密封墊片。
6.配件與配件間采用螺絲連接的，螺絲松緊程度應(yīng)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 管道安裝 Pipe installation
1 塑料管道安裝時(shí)，應(yīng)考慮環(huán)境溫度對安裝質(zhì)量的影響，一般氣溫高于40℃或低于0℃時(shí)，不宜施工安裝。
2 由于塑料管道線膨脹系數(shù)大，一般為鋼材8倍左右，在安裝時(shí)要考慮熱補(bǔ)償，一般以自燃補(bǔ)償為主，也可采用聚四氟乙烯波紋膨脹節(jié)進(jìn)行補(bǔ)償，或橡膠補(bǔ)償器。
3 對于架空敷設(shè)的管道應(yīng)采用管托支撐，管托可用角鋼，對剖的鋼管材料，使管道在托管上能自由伸縮，管線支架距離見下表
4 對于埋地敷設(shè)的管道一般埋沒深度為0.7米以下，并要不受地面交通的影響，所挖的管溝應(yīng)平整，溝底及兩側(cè)的石塊、碎磚、玻璃等堅(jiān)硬物清楚干凈。復(fù)土使用高質(zhì)量的回填土，將管子周圍填土密實(shí)，不應(yīng)參有碎石。
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 焊接工藝要求 Welding process requests
1 焊接材料與管道材料必須相同
2 焊接溫度，聚丙烯210~230℃，聚乙烯195~210℃（具體情況根據(jù)室外溫度而定）。
3 管道焊接處必須清潔干凈。
4 焊縫表面應(yīng)平整，不準(zhǔn)有波紋形及焊縫彎曲現(xiàn)象。
5 焊條排列應(yīng)緊密，不準(zhǔn)有空隙。
6 焊條和管材及管件必須處于同時(shí)熔融狀況進(jìn)行焊接，但不應(yīng)有燒焦或分解現(xiàn)象。
7 焊條應(yīng)垂直焊縫并略施加一定作用力，知道焊條與制品熔接為止。
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 聚丙烯在各種溫度下的允許使用壓力
Polypropylene’s permit use pressure under all sorts of temperature |
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