TESTING THE INSTALLED PIPELINES
After the pipelines have been installed, the following inspections and/or tests according to EN 1610, section 12, need to be carried out: visual inspection, tightness, embedment zone, main filling, compaction and pipe deformation (not necessary for vitrified clay pipes).
Tightness tests for pipelines, manholes and inspection chambers are to be done according
to EN 1610, section 13.1, either by means of the air testing method (L) of the water testing method (W). A preliminary test can be carried out before the side bedding is added. Approval tests require the testing of the pipelines after filling and removal of the trench lining material.
When performing the test for open trench construction, the connections can be tightly sealed with stoppers and spring clips or rapid-fit stoppers (only testing method W). Fixing devices are to be secured against movements and must be form-fit! Leakages in the sealing devices and the testing device must be avoided. With testing method W, proof of tightness is determined via the water loss under test pressure during the testing time (value W30), and with testing method L, via the value of pressure drop during the testing time.
- Test pressure: 0,1 up to 0,5 bar
- Testing time 30 minutes
- Preliminary testing time: 60 minutes
- Pipeline: 0,15 l/m2
- Pipeline and manholes: 0,20 l/m2
- Manholes and inspection chambers: 0,40 l/m2
|Nominal size||Filling quantity||Permissible water addition|
Recommendation: Use air pressure test method LC 100
Settling time for the air pressure test:
up to DN 500: min. 5 minutes
from DN 500: DN/100/minutes
It is not necessary to test vitrified clay pipes for pipe deformations.
If a socket test is necessary for technical reasons, all used test devices should be double packer devices to minimise leaks between packer and pipe wall.
Due to the complex and error-prone measurement technology, all results from individual tests are assessed in a deviation evaluation, in relation to the pipeline length.
Testing and assessment of the findings are two separate CCTV sewer inspection services. The assessment must take into account the technical conditions of the pipes, fittings and joints at the time of delivery.
TESTING METHOD (L) AIR PRESSURE TEST ACCORDING TO EN 1610, PERMISSIBLE PRESSURE DROP (ΔP)
|Nominal size||Test method|
|Test time in min.|
! Warning: EN 1610: the test protocol has to be prepared individually for each test. As a service for our customers, we provide protocols for air and water tightness tests upon request.