Additional Information

 

Important Tips 

 

Pump delivery pressure should be less than the selected hydrostatic allowable pressure, of column pipes

 

During column pipe installation near a pump, maximum hydrostatic delivery pressure is generated and similarly on the top most pipe, the entire load of column pipes is applied including filled water and the pump

 

In deep bore-wells with high pressure pumps, two classes of column pipes of the same size may be used for saving costs. Heavy pipes may be connected directly to the pump, after some height and where there is a loss of delivery pressure, standard pipes can be used at the top. For such combination systems do not use V4, medium or crystal range of pipes

 

Column pipes give best service in bore-wells with full casing. Bore-wells which are free from loose stones, soil or silt also give better performance, in cases where loose stones, soil or silt are available slightly larger bore or full casing is suggested to prevent the pump from getting clogged (stuck), when operational Bore-well drilling should be straight down without bending

 

During a dry run of the pump, heat generated may damage the column pipe, in such case the initial 3 meter steel pipe is suggested to be connected directly with the pump for proper heat dispersion before it reaches the column pipe

 

Dry running condition may be tackled by installing a hand-operated valve, at the top of the bore-well and keeping it partially open, so as to limit the water flow ensuring that the pump does not get dry

 

 

Frequently Asked Questions

 

What is uPVC?

uPVC means ‘un-plasticised poly vinyl chloride’. Un-plasticised PVC gives rigidity to any product. Finolex Column Pipes are made of a compound which is non-toxic, rust proof, avoids deposition, anti-abrasion and anti-corrosion. These properties give long life to the pipe, also this modified uPVC gives a high tensile strength along with a high impact strength.

 

What is the life span of uPVC pipes?

Under proper usage conditions and proper storage, away from sunlight, the uPVC pipes in India show a life span of more than 50 years.

 

What are the benefits of uPVC pipes?

Use of uPVC pipes provide savings on cost of pipes, power, gives 30% more water, saves handling time and ensures a longer operational duration.

 

How does it affect the quantity and quality of water?

Over a period of time steel pipes get corroded, rusted and the water quality deteriorates, but Finolex Column Pipes are non-corrosive throughout their life span, hence, water quality remains good and fresh forever.

 

Can uPVC strength be compared to a steel pipe?

The specific gravity of uPVC is 1.4-1.45gm/cm3, whereas that of a steel pipe is 8gm/cm3. Taking the strength of the material into consideration, they are optimally designed to make them light weight, without any compromise in their strength requirements.

 

To what depth can the pipes be lowered?

The pipes should be used after careful selection, based on pump delivery head and maximum allowable pressure. The depth of the bore-well may differ from place to place, depending up on the water level in the bore well. Finolex offers a range of pipes to suit the customer’s requirements of various depths. A 50mm (2”) heavy column pipes may be lowered in a bore-well to a depth of approximately 275m (900ft.).

 

Any adhesive required for joining of pipes?

No solvent is required for this task.

 

Can we re thread the column pipes?

Re-threading of a column pipe will not be required under normal usage conditions and these are special threads that cannot be made on site.

 

How to tighten the pipes?

Tighten the pipes with hand and rope, so that rubber seal fully enters in to the coupling pipe.

 

Do column pipes need full casing in the bore?

Casing needs to be provided where the bore-well is in loose soil. Casing is not required if the soil is firm and not likely to give away. The pump life depends upon the clear water. If the water is muddy, the clogging of pipes and pump failure occurs frequently.

In such areas where loose boulders and stones are prevalent then full casing or slightly larger bore should be made, so that the pump does not get stuck.

 

There is a variation in thickness of the pipes. Why?

The pipe thickness of the barrel has been designed by taking the pump weight, water column weight and the pump delivery pressure into consideration. The end of the pipes are made thicker, so that even after making the threads and removal of material, the same barrel thickness remains under the threads. Therefore, the strength of pipe can be maintained equally at the end and in the barrel.

What happens if a bore collapses?

Casing needs to be provided where the bore-well is in loose soil. Casing is not required if the soil is firm and not likely to give away. The pump life depends on clear water. If the water is muddy, it clogs the pipes and pump failure occurs frequently.
In such areas where loose boulders and stones are prevalent then full casing or slightly larger bore should be made, so that the pump does not get stuck.

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