Assembly
Figure 12.4
Figure 12
Components must not be subjected to open fire.
For screw-type joints, threaded fittings must be used. Cutting thread directly to plastic components is not permitted. Threads are sealed with a special teflon tape or sealing compounds.
Figure 12.5
Figure 12.1
Polyfusion welding or electric and butt welding techniques are used to join plastic parts. The result is a high- quality homogeneous joint. A correct working process and appropriate tools must be used in joining procedures. Welding Dacta Therm components together with other brands is not suggested (because of warranty issues).
If the pipeline continues with metal piping beyond a combined pipe fitting, then no welding or brazing is allowed near this point due to possible hazard of heat transfer to the fitting.
Figure 12.6
Figure 12.2
Components of plastic piping systems must be protected against falling, impact, blows or another mechanical damage during transport and installation.
Pipeline crossings are made by using components which are specially designed for this purpose.
Figure 12.7
Figure 12.3
Pipe bending should be done at +15°C. Minimum bending radius for pipes of diameter range 16 - 32 mm is eight diameters.
To cap off a pipe, e.g. if elbows for wall mounting or wall assemblies are to be closed before mounting outlet fittings, an end cap is used (for example during pressure tests, etc.)
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