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Casing Pipes

Finolex casing and ribbed screen pipes are manufactured using a special Lead Free PVC-U compound which makes them ideal for the transportation of hard, salty, sandy or chemically aggressive water. Finolex range of PVC-U plain casing and ribbed screen pipes are specially designed to protect water lines from soil conditions.

This special design makes them ideal for domestic wells, industrial wells, public and mining wells. These pipes are also anti-corrosive, which prevents chemicals in the soil from affecting them.

Finolex casing and ribbed screen pipes are better than conventional metal pipes as they are lightweight, corrosion free and long lasting. These pipes do not alter the water quality and are recyclable. Casing pipes are easy to install as the threaded ends ensure that the pipes can be interlocked without the use of cements or adhesives.

Our stringent quality assurance approach across all stages of manufacturing gives the product a high degree of reliability making Finolex casing pipes a preferred choice for farmers, users in domestic and commercial establishments, and quality conscious people across the country.

Our wide range of casing and ribbed screen pipes, CS (Shallow well casing), CM (Medium well casing)
CD (Deep well casing) and Ribbed Screen (RMS & RDS) Pipes. These pipes are available in 40 mm (1.1/2”) to 250 mm (10”) sizes for different well depths. Our varied range of casing pipes conforms to the IS 12818 and ASTM D 1785 standards, and caters to diverse bore well requirements.

Casing Pipes

Features & Benefits
  • Excellent stiffness helps pipes withstand external hydraulic pressure
  • Pipes are a non-conductors of electricity
  • Horizontal slots enable laminar flow into the bore well, reducing losses in the entrance of the bore well
  • Maintenance free and more economical as compared to conventional pipes
  • Manufactured from a special PVC-U compound with extra toughness
  • Increased permeability due to continuous ribs keeps gravel pack away from slot opening
  • Easy and quick installation
  • Lead Free

Application

Domestic
Irrigation
Bore-well casing
Industrial mining

Technical Details


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Following factors may result in pipe deformation and bursting. Bore mechanics should take care while installation:

• Hydraulic pressure difference created by inside water and outside while drilling mud.

• Hydraulic pressure and heat created during bentonite/cement grouting.

• Stress formation due to types of rocks, clay and shale present outside the pipe.

• Development of sudden internal vacuum inside the pipe.

• Lateral compression and brittle failure after external impact of the hard bedrock.

Additional information


CASING PIPE INSTALLATION GUIDELINES

• Drill the bore of the required size and depth in the ground. Care should be taken that it is vertical, without any bends.
• To obtain better results, ensure that the reamed borehole is at least 15 to 25 cm more than the outside diameter of the casing pipe.
• In bore wells with loose boulders, casing pipes are recommended for the entire depth.
• Use slotted pipes manufactured by Finolex. We do not recommend slotting to be done by any other company.
• Don’t use vertical slotted pipes in a bore well as they may not have enough strength and are not recommended by IS 12818 standard.
• Check to ensure that pipe threads are not damaged. Clean it with normal water to avoid forceful jointing. Don’t use any chemicals for cleaning pipe threads.
• Ensure that rubber gaskets are properly placed in the groove on the male threads of the pipe.
• Use plain water or soapy water for thread cleaning.
• Do not apply grease, oil or any other lubricant on the threads.
• Use an end cap at the end of the bottom pipe during installation.
• Join one pipe after the other. Tighten pipes using a strap wrench so that 50% of rubber-sealing ring on male thread end gets into the seat of coupler female threads.
• Do not over tighten as it may result in crushing of rubber seals leading to leakage and cracks in the pipe.
• Do not use a pipe/chain wrench to tighten the joints.
• Don’t hammer the pipes during assembly. Do not apply excessive vertical pressure on the pipes during installation.
• Don’t dump gravel at a very high rate to avoid excess abrasion. Do not use clay as packing material outside the pipe, where the bore well shows presence of water at the time of digging.
• Cleaning of bore well with clean water is recommended immediately after the pipe installation.
• Flushing of bore well within 24 hrs. after drilling and backfilling of casing pipes must be done to avoid developing strong cohesive forces around the pipes. In this case, the pressure required for bore well cleaning is quite high which may lead the pipe to burst.
• Take extra care at the time of bore well flushing. Use a rubber coated metal pipe joined at the end of the compressor air hose. Keep compressor air pressure below 12 bars. Generation of excess pressure inside the bore well may lead to pipe breakage.

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CERTIFICATIONS AND APPROVALS


• Casing and Ribbed Screen pipes are manufactured conforming to IS 12818 (Bureau of Indian Standards) and as per ASTM D 1785.
• Approved and tested by CIPET (Central Institute of Plastics Engineering & Technology).

FAQ

  • What are the various types of Finolex casing pipes and where is it used?

    Finolex offers casing pipes in - CS (Shallow Casing- for well depth of 80- meters), CM (Medium Casing- for well depth from 80 to 250 meters), CD ( Deep Casing -- for well depth between 250-450 meters). All in plain and slotted types; Ribbed Screen, with slottings, Casing pipes in SDR series (for well depth from 12 to 24 meters )-Plain & slotted, ASTM Dark Blue casing pipes in SCH 40, SCH 80.These are available in various sizes.

  • How is slotting on Finolex pipes different?

    In Finolex pipes, slotting is done perpendicular to the axis of the pipe i.e., horizontal slotting is done with the help of state-of-the-art CNC machines, without compromising the strength of the casing pipes. This is as compared to the products available in the market where slotting is done vertically, along the length of the pipe, which reduces the strength of the pipe.

  • In CS, CM, CD type of casing pipes, how jointing is done?

    These Casing pipes are easy to install as the threaded ends make sure that the pipes can be interlocked without the use of solvent cement. There is perfect interlocking of male threading end of one pipe and the female threading end of the other pipe.

  • Are PVC casing pipes better than conventional metal pipes?

    Finolex casing pipes are lightweight, easy to transport and install and do not corrode. They are more economical, and last for years. It does not impart any taste, odour or colour and it does not release any harmful substances into the water hence safe for potable/drinking water. All these qualities and features make them better than conventional pipes.

  • Where casing pipes are recommended?

    Casing Pipes are used in borewells, especially where soil is highly collapsible, after drilling like sandy-loose soil and silt. The casing pipes protect the bore from collapsing.