Solvent Cement Jointing:
Marking the jointing length
Wipe the outside of the pipe and the inside of the socket with a clean cloth to remove obvious dirt. Marking the jointing length on the pipe end makes it possible to check afterwards whether the pipe has been inserted to the full extent of the socket.
Note: If the outside diameter of the pipe and the inside diameter of the socket are at opposite extremes of their tolerances, then the pipe cannot be inserted dry into the fitting socket. This will only become possible once the cement has been applied.
Checking the cement
Stir thoroughly before using! Cement of the correct consistency will run evenly from a wooden spatula held at a slant. Cement which no longer runs smoothly is unusable. The cement must not be thinned.
Cementing
Clean the outside of the pipe end and the inside of the socket thoroughly with cleaner and absorbent paper.
Clean the outside of the pipe end and the inside of the socket thoroughly with cleaner and absorbent paper.
Use a fresh piece of paper for each component. Remove any condensation which may have formed on the parts.
Important:
Pipe end & fitting socket must be dry and free from grease and dirt and must not be touched after cleaning.
Cleaning the pipe and socket
PVC-U pipes may have a waxy surface. To ensure proper jointing in such a case the cleaning process must be repeated until the pipe surface becomes matt to the eye. For the range of dimensions d250 - 400, mechanical machining of the pipe surface can be necessary in individual cases. An indication of inadequate jointing quality, which could be expected, is absence of or insufficient adhesion of the jointing parts following fine cleaning ("finger-nail check"). The jointing surfaces should then be roughened evenly with emery cloth of grain 80 or finer, observing the max. permitted gap. PVC-U pipes should be cemented at temperatures between 5 °C and 40 °C. Take the following protective measures if the temperatures deviate from the above: At lower temperatures, condensation or frost which may have formed must be removed, e. g. with warm air. Cement and cleaner should be stored at room temperature. Avoid uneven overheating (→ shorten the opening time) when cementing at higher temperatures by protecting the jointing area from direct sunlight.
Applying the cement
Begin by applying a normal layer of cement to the fitting socket and then a thicker one to the pipe end with firm brush pressure. Work in well. The brush strokes should always be in an axial direction. To ensure that both jointing surfaces are completely covered with a smooth, even layer of cement, the brush should be generously loaded with cement.
Range of dimensions up to d75
Apply cement
The cement joints can be produced by one person.
Jointing
After the cement has been applied, insert the pipe to the full depth of the socket immediately without twisting and bring them into the correct alignment. Ensure that the outlet of the fitting is in the correct position. Hold them briefly in this position to allow the cement to set. Waiting time between cementing Wait at least 5 minutes before the next joint, extend the waiting time at temperatures under 10 °C to 15 minutes.
Range of dimensions d90 to d225
Apply cement
The fitting socket and end of pipe should be coated with cement simultaneously by two persons, otherwise the opening time of the cement cannot be observed.
Jointing
After the cement has been applied, insert the pipe to the full depth of the socket immediately without twisting and bring them into the correct alignment. Ensure that the outlet of the fitting is in the correct position. Hold them briefly in this position to allow the cement to set.
Waiting time between cementing
Wait at least 5 minutes before the next joint, extend the waiting time at temperatures under 10 °C to 15 minutes.
Range of dimensions d250 to d400
Apply cement
Deviating from the usual method of application, pour the cement directly from the tin onto the middle of the cementing surface and distribute first radially and then axially all over with a flat brush. Make sure that the cement layer is consistent and covers the entire surface as appropriate for the larger tolerances. Apply a thinner layer of Tangit in the fitting than on the pipe ends. The cementing of pipe work in this range of dimensions should be carried out by at least 2 persons. The minimum thickness of the cement layer for fittings is 1 mm, apply more generously on the pipe ends.
Jointing
After applying the cement, the pipe and fitting should be slowly pushed together to the stop or the mark without twisting by 3-4 persons and aligned. Ensure that the outlet end of the fitting is in the correct position. Hold the joint in this position for 1 minute.
Waiting time between cementing
A waiting time of 15 minutes should be observed before further jointing; this time should be increased to 30 minutes at temperatures below 10 °C.
Replace the lid of the cement tin during work breaks
Remove any surplus cement immediately, using absorbent paper. A bead of excess solvent cement around the complete external circumference of the joint and a slightly smaller bead again around the complete internal circumference show that the joint has been performed correctly. After use, clean the brush of excess cement with dry absorbent paper and then clean thoroughly using TANGIT cleaner. Brushes must be dry before being re-used (shake out). Replace the lid of the cement tin after use to prevent the solvent evaporating. Using the conical lid allows leaving the brush in the cement tin during breaks.
Both solvent cement and cleaner dissolve PVC-U. Pipes and fittings must therefore not be laid on or allowed to come into contact with spilled cement or paper containing cement residues. Do not close off cement pipelines during the drying process. This is particularly important at temperatures below + 5 °C, when there is otherwise a danger of damaging the material.
After the drying process (see waiting times in the following table) the pipelines can be filled. It is recommended to flush the pipeline before use, and leave it filled with water if it is not directly used. Do not use compressed air for flushing.
Drying period and pressure testing
The drying period of the cement before application of the test or working pressure depends on the drying temperature, the dimension and the fit conditions. The waiting times required between completing the last joint and the pressure test are specified in the following table. If the pipe is only subjected to the operating pressure, e. g. after adaptation or repair work, the following rule of thumb for the drying waiting time applies: 1 hour waiting time per bar operating pressure. For temperatures above 20 °C the test pressure must be reduced according to the requirements given in the chapter "Final testing and commissioning".
Protect pipes and fittings from spilled solvent cement, cleaner and absorbent paper which has been used to wipe off cement. Do not dispose of surplus solvent cement or cleaner in drainage systems. The use of protective gloves is recommended to avoid contact with skin. If the cement or the cleaner get in contact with eyes, rinse immediately with water. Consult a doctor! Immediately change clothes that have solvent cement on them. Always obey the safety regulations issued by the authorities responsible.