PPR pipe fittings, including the main points of construction

PPR pipe fittings, including the main points of construction
In the PPR pipe construction, buried pipeline ditch bottom should be smooth, not to have prominent sharp and hard objects, the size of the original soil should not be greater than 12mm, when necessary, can be covered with 100mm thick sand cushion.
Then, the backfill soil around the pipe should be filled to the top of the pipe roof above 300mm, after compaction to backfill soil, the depth of the indoor buried pipeline should not be less than 300mm. Another is to fully consider the pipeline thermal expansion effect, according to the specific situation and take necessary measures for the small caliber pipeline should be directly concealed; in surface and non concealed buried pipeline, in space permitting, as far as possible the use of free compensation; with a semi-circular metal plate reinforced pipe. There is strictly according to the welding operation procedures and other safety construction regulations.
Because the PPR pipe with different diameters under different temperature, the weld depth, heating time, insertion time has strict requirements, and are not allowed to rotate in the heating pipe and pipe fittings and the splicing process, otherwise prone to welding quality problems.

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