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，並與管道中心線垂直。
2 採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 對於承插連接的管子與管件，承心內側應有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小於0.3mm，承心的垂直偏心度應小於1mm。
5.法蘭與法蘭管件連接，配合面間應加密封墊片。
6.配件與配件間採用螺絲連接的，螺絲鬆緊程度應基本一致。
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 ca江蘇潤和工程塑業mber 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，應考慮環境溫度對安裝質量的影響，一般氣溫高於40℃或低於0℃時，不宜施工安裝。
2 由於塑料管道線膨脹係數大，一般為鋼材8倍左右，在安裝時要考慮熱補償，一般以自燃補償為主，也可採用聚四氟乙烯波紋膨脹節進行補償，或橡膠補償器。
3 對於架空敷設的管道應採用管托支撐，管托可用角鋼，對剖的鋼管材料，使管道在託管上能自由伸縮，管線支架距離見下表
4 對於埋地敷設的管道一般埋沒深度為0.7米以下，並要不受地面交通的影響，所挖的管溝應平整，溝底及兩側的石塊、碎磚、玻璃等堅硬物清楚乾淨。復土使用高質量的回填土，將管子周圍填土密實，不應參有碎石。
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 u
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℃（具體情況根據室外溫度而定）。
3 管道焊接處必須清潔乾淨。
4 焊縫表面應平整，不准有波紋形及焊縫彎曲現象。
5 焊條排列應緊密，不准有空隙。
6 焊條和管材及管件必須處於同時熔融狀況進行焊接，但不應有燒焦或分解現象。
7 焊條應垂直焊縫並略施加一定作用力，知道焊條與製品熔接為止。
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