厦门科恒塑胶有限公司

xiamen keheng plastic co.,ltd

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Constructing Method of UPVC/CPVC Pipes

UPVC/CPVC piping systems are bonded by special solvent. Hereunder are the steps:
2.1.1 Cutting
Power Saw and plastic tubing cutters can be used for pipe cutting. Cut the pipes as squarely as possible to provide maximum bonding area.
2.1.2 Deburring
Burrs must be removed from the inside, as well as the outside, of the pipe ends by pliers, filer and sandpaper on both inner side and outside of the cutting edge so that pipes and fittings are bond tightly.
2.1.3 Marking
Making marks on all pipes according to the length & depth of fitting parts. It can be used to ensure the pipe is completely bottomed into the fitting during assembly.
2.1.4 Solvent Coating
Standard Volume of Cement
Nominal Outside Diameter(mm)
20
25
32
40
50
63
75
90
110
125
140
160
Cement Volume(g/piece)
0.40
0.58
0.88
1.31
1.94
2.97
4.10
5.73
8.43
10.75
13.37
17.28

2.1.5 Assembling
After coating cement, insert pipe into fitting socket while rotate the pipe a quarter turn. Pipe must bottom completely to the fitting stop. Hold the assembly for 10-15 seconds to ensure initial bonding (2 persons work together to bond pipes larger than 6”). A bead of cement should be evident around the pipe and fitting juncture. If this bead is not continuous around the socket shoulder, it may indicate that insufficient cement was applied. If insufficient cement is applied, the joint must be cut out, discarded and begun again. Cement in excess of the bead can be wiped of with a rag.