What is NDRC works?
Horizontal Directional Drilling is a non-destructive surface-launched digging method which allows installation of underground pipe, conduit, or cable with minimal disturbance to the surrounding area.
What is HDD in civil engineering?
Horizontal Directional Drilling (HDD) is a construction technique whereby a tunnel is drilled under a waterway or other designated area, and a pipeline or other utility is pulled through the drilled underground tunnel.
What is the difference between HDD and Microtunneling?
Microtunnelling is a pit-launched technique with extreme accuracy and low risk, but it has a high upfront cost. One the other hand, HDD is surface launched, making it cheaper than microtunnelling. However, it has a higher risk as it is less precise and there is a risk of flex along the pipeline.
What is a slip bore?
Slick boring is a method of horizontal directional drilling that uses a slurry mixture as an aid to the drilling process. The liquid is pumped into the borehole to increase the speed and effectiveness of the drilling and to evacuate the excavated material. Slick boring is also known as slurry boring or wet boring.
What is PE casing?
PE casing pipes Material – high-density polyethylene (HDPE). Polyethylene pipes are seamless, resistant to impact at the temperature exceeding -20°C, resistant to corrosion. Length of casing pipes (L) as ordered by the customer.
What are casing insulators?
CASING INSULATORS Casings are used to protect pipelines. These pipelines usually run along highways, railway lines or regions with high activity. The pipeline is needed to be separated from the pipeline. VKVC casing insulators are tubular pipe supports; that electrically insulate the pipe and prevent damage.
What is Jack pushing method?
Powerful hydraulic jacks are used to push specially designed pipes through the ground behind a shield at the same time as excavation is taking place within the shield. The method provides a flexible, structural, watertight, finished pipeline as the tunnel is excavated.
What is PE100?
PE100 is a version of HDPE and stands for Poly Ethylene with an Minimum Required Strength (MRS) of 100 at 50 years and 20º according to ISO4427.
What is PE pipe material?
Polyethylene (PE) is a thermoplastic material produced from the polymerization of ethylene. PE plastic pipe is manufactured by extrusion in sizes ranging from ½” to 63″. PE is available in rolled coils of various lengths or in straight lengths up to 40 feet.
What is spacer in piping?
Spacer Rings, also known as piping spacers, are used between flanges to correct gaps or misalignment. Spacer rings are sometimes tapered and are almost always custom machined per very specific measurements. We can turn up to 84″ diameter rings in house.
What are end seals used for?
An end seal is a 1/8″ thick synthetic rubber seal that eliminates foreign material from entering the annular space between a carrier pipe and a casing pipe.
What is pipe jacking method?
Pipe jacking is a trenchless construction method to install product pipe through the ground on line and grade for new service lines, sewer tunnels and utilities.
What is PE80 and PE100?
PE80 and PE100 meaning The designations PE80 and PE100 are based on the long-term strength of the respective materials, known as the minimum required strength (MRS) in accordance with ISO 12162. The designations are: Material Designation. Minimum Required Strength (MRS)MPa.
Which is better PVC or PE?
The PVC fabric is stronger than PE (i.e. polyester or HDPE) and is therefore more resistant to weather effects. PVC has a longer lifespan.