How are UPVC pipes joined?

The connection methods of UPVC pipe include socket rubber ring connection, adhesive connection and flange connection. Sometimes the connection also needs pipe fittings, but the method is nothing more than the above two. The small diameter of PVC is the general use of (below 63) 50. Special adhesive for PVC for bonding.

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Adhesive connection and flange connection are more suitable for pipes with larger diameters. If adhesive connection is used during construction, it is difficult to ensure the absolute cleanliness of the pipe joint before bonding. A grain of sand or a small air bubble will be a hidden danger of joint leakage. In addition, the bonding is also affected by temperature and air, which makes it difficult to construct outdoors.

Precautions for the use of UPVC pipes:

Press the tightly connected pipe joints and apply static force until the pipe fittings are not pushed out (mechanical fixing force). During the bonding process of pipe and pipe fittings, there will be mutual repulsion and withdrawal. If they are not statically stressed, they will not repel each other There will be a hidden danger of water leakage. When the process of bonding the pipes is completed, there should be a ring of glue at the joint.

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To wipe off the dust, oil stains and moisture (moisture, dust and oil stains will affect the bonding strength) where the glue needs to be applied to the pipes and fittings. Apply the glue evenly to the inner wall of the pipe fitting socket. Too much glue or too little glue is strictly prohibited in this operation. Too much glue will flow into the pipe fitting and cause the pipe fitting to be blocked. Excessive glue will cause the pipe fitting and the pipe to be loosely connected and cause the water pipe to leak.

Solvent cement/glue jointing system

This method, otherwise known as a Solvent Weld, is the most popular and requires a low skill capability. PVC 'solvent cement' or 'glue' is in essence the chemical mixture that when applied to the mating surfaces of the PVC pipe, fitting or valve connections, welds them together by means of a chemical reaction creating what is technically known as an 'homogenous bond' i.e. the two separate surfaces are now chemically fused to become one. 

CORRECT JOINING PROCEDURE: 

• Cut the pipe square and deburr the spigot. 
• Mark the socket depth to the spigot end. 
• Clean dry and degrease the two jointing surfaces. 
• Check the fit before making any cuts or applying any glue 
• Apply priming fluid to the socket and the spigot ends. 
• Apply an even coat of solvent cement to both the socket and spigot ends. 
• Insert the spigot the full market depth of the socket and HOLD for a minimum of 30 seconds. 
• Clean off any surplus solvent cement.

Rubber ring joining

Rubber ring joints provide a fluid seal by compressing a rubber ring housed in the socket of a pipe or fitting when the spigot is passed into the socket. the correct jointing ring are supplied with the pipe or fitting

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