當管件連接不正后，在安裝整段管路系統時，采用管卡將三通、彎頭等管件硬性扳正，則會使管道系統長時間承受較大的應力，導致一些熔焊不好的位置在一段時間后容易產生泄露。所以在熔焊前，先預安裝，pvc管業電話，用筆畫標記線；在正式連接時只要對齊該標記線就可以了。
when the pipe fittings are not connected correctly，pvc管業， when installing the whole pipeline system， the pipe fittings such as tee&elbow are rigidly straightened by pipe clamps， which will cause the pipeline system to bear large stress for a long time，亳州pvc管業， which will lead to leakage in some places with poor fusion welding after a period of time. so before welding， pre install&mark line with strokes; just align the marker line when you are formally connected.
ppr管格與管件連接端面必須清潔、干燥、無油。
用卡尺和合適的筆在管端測量并標繪出熱熔---，熱熔---應符合下表規定：
熔接彎頭或三通時，pvc管業加盟，按設計圖紙要求應注意其方向，在管件和管材的直線方向上，用輔助標志標出其位置。
the connecting end face of ppr pipe lattice&pipe fittings must be clean， dry&oil-free.
measure&plot the hot melt profundity at the pipe end with a caliper&a suitable pen. the hot melt profundity shall meet the requirements of the following table:
when welding elbows/tees， the direction could be noted according to the requirements of design drawings，&the place shall be marked with auxiliary marks in the straight direction of pipe fittings&pipes.
根據耐腐蝕性能來參考?
具體來說，ppr管材耐腐蝕與防結垢性能則施工項目管道的基本需求，優良的ppr管材的耐化學腐蝕性能---，其能夠抵抗水中的化學元素的腐蝕，與此同時，其表面則可避免水垢的形成，以此可以促使輸送的水潔凈與衛生。
according to the corrosion resistance
specifically，corrosion resistance&anti scaling performance of ppr pipe are the basic requirements of building project pipeline. excellent ppr pipe has better chemical corrosion resistance， which can resist the corrosion of chemical elements in water. at the same time， its surface can avoid the formation of scale， which can promote the transmission of water more clean&sanitary.
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