Solvent Cement Welding of PVC Piping

Solvent Cement joining is used to join vinyl pipe, polyvinyl chloride (PVC), and Chlorinated Polyvinyl Chloride (CPVC). As the pipe diameter increases, so does the difficulty in installing it. To assume proper workmanship, attention to the following procedures should be taken:

The size of the joining crew should be increased:
6-inch – 8-inch pipe: two to three people per joint
10-inch – 24-inch pipe: three to four people per joint

The end of the pipe must be chamfered as per the pipe manufacturer’s specifications.
The primer and cement should be applied simultaneously to the pipe and fittings
Ensure the application of a second full layer of cement to the pipe
Because of the short sockets in many large diameter fittings, it is essential to have pipe bottomed into the fitting. It is for this reason that above 6-inch diameter we recommend the use of a come-along to press the pipe into the fitting.
Testlabs International has the experience and laboratory facilities to evaluate the workmanship and integrity of solvent cement welded joints in large diameter (6-inch diameter and above) pipes as indicated in the polished longitudinal section through a solvent cement joint. The inadequate application of solvent cement is highlighted in the second image of an inadequate bond surface.