THE MAGAZINE FOR THE DRAINAGE, WATER & WASTEWATER INDUSTRIES
ADVERTORIAL
has only aminor impact on the environment – traffic can continue to flow or protected natural areas are hardly touched. The insertion speed of up to tenmetres perminute reduces the total installation time to aminimum. Once the connectors have been installed and the integrity of the systemhas been successfully tested, the pipeline can be reconnected to the network.
If it is not possible for the operators to take the sewer risingmains out of operation for a limited period due to time and cost reasons, Rädlinger primus line GmbH offers another solution: Primus Line® Overland Piping can be deployed as temporary bypass and re-used afterwards.
Tested quality
Safety is important when transporting contaminated water. Rädlinger primus line GmbH promises a service life of at least 50 years for their systemof liner and connectors in rehabilitations and backs up this statement by vigorous qualification testing, such as cyclical load or abrasion tests.
In the load test according to the ISO 15306 standard, a cyclic load of 75 to 125 per cent of themaximumoperating pressure is applied to the liner and connectors under test to check their effect on the burst pressure. The result after onemillion unrestrained cycles: An effect of the varying internal pressure load on the burst pressure of the Primus Liner is not verifiable. Thematerial did not show any aging after this test.
In the abrasion test following the DIN EN 295 standard, appendix 1, the so-called“Darmstadt Procedure”, amixture of water andmaterials of different grain sizes ismoved back and forth on the liner’s inner layer. For this purpose, a half-shell of the liner to be tested is fixed in a tipping trough. Here, too, the result after 600,000 cycles is convincing: The inner layer of the Primus Liner, which ismade of polyethylene, is abrasion-resistant.
Bymeans of thematerial tests in combination with a continuous factory quality control, the operator gets a safe and high-quality product for his application.
Time- and cost-saving alternative
Trenchless systems with annular space such as Primus Line® are a time- and cost-saving alternative to the rehabilitation of sewer rising mains with conventional dig-and-lay. Product andmaterial properties relieve the operators of sewer risingmains through short installation
Existing shafts can also be used as access points for the rehabilitation with Primus Line®.
Small excavation pits at start and end point of the line section to be rehabilitated limit the impact on the direct environment to a minimum.
times and fast recommissioning.
The benefits of the Primus Line® technology are also transferable to rehabilitations in the drinking water sector. The systemis approved for drinking water applications inmore than twenty countries.
Special situation in Germany: Pressure test of sewer rising mainsmandatory in Bavaria as of 2024
About 10%of the sewers, combined sewers and stormsewers in Bavaria are sewer risingmains. According to the currently applicable self-monitoring regulation, they would already have to be checked for leaks. Until now, however, there has been no appropriate testing procedure. The potential of undetected leaks is therefore high – with the known effects on the environment.
The Augsburg University of Applied Sciences (HSA) has developed a standardised procedure on behalf of the Bavarian State Office for the Environment, the so-called HSA standard procedure.When the new version of the self-monitoring regulation, which will be published in 2024, explicitly requires the testing of the tightness of sewer rising mains, a corresponding testing procedure will now be available. Other German federal states, such as North-RhineWestphalia, are also working on adapting the corresponding state-specific self- monitoring regulations.
primusline.com FOLLOW US July 2023 | 15
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80
