Which borehole tie in water mains? Construction of water mains requires an efficient and easy-to-implement method of connecting connections to the existing main pipeline. Such advantages characterise the making of connections by means of a bore tie (water supply bore).
Table of contents:
Joining pipes to the water supply connection
Drill ties - types
What kind of tie to drill in water mains?
Joining pipes to the water supply connection
Water mains are made of metal pipes and fittings (steel, ductile or grey cast iron), plastic (polyethylene, polyvinyl chloride) or asbestos cement. The most common material used for water pipes is polyethylene. In order for the network to function properly, the pipelines to the water supply connection must be correctly connected. The necessary parts for making connections are:
- saddle tees (saddle siphons) - among other things, it is required that a section of the pipe is taken out of service before it can be used, as well as being flushed and disinfected, and the system emptied of residual water,
- drilling ties, where it is possible to drill the pipeline under pressure.
Drill ties - types
We can subdivide drilling ties according to the construction method and material of the tool:
- ductile cast iron (all body),
- narrow cast iron body (bolted with two screws),
- ductile cast iron and steel strip (for extremely small and large pipe diameters).
Example of a bore band for PE and PVC pipes.
What kind of tie to drill in water mains?
In order to correctly select a bore band, it is necessary to determine:
- The material from which the main pipeline is made. Different ties are used for metal and asbestocement pipes than for plastic pipes.
- Diameter of the main pipeline and diameter of the connection
- Whether the ability to drill the pipeline under pressure is required
- What type of connection is required on the connection side. The connection can be made to the borehole using threaded, electrofusion welded or flanged connections.
- Is the bore band to be fitted with an integrated gate valve. If so, it is a borehole gate or NWZ borehole.
If you are in doubt, we recommend that you consult the connection design. Alternatively, you can ask our technical and commercial advisors for support.
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