Borewell Casing Pipe Guide: Deep Well vs Medium Well uPVC Casing

Casing is the lining of a borewell. It holds the borehole open, keeps soil and loose rock out, and protects the water that enters the well. Choosing the right borewell casing pipe depends mainly on depth, ground conditions and the pump that will be installed inside it.

What does a casing pipe do?

A casing pipe supports the structure of the well. Plain casing runs through the upper, unstable layers, and screen (slotted) casing is placed where groundwater enters. The pump and column pipe are then lowered inside the casing.

Deep Well vs Medium Well casing pipes

Vinyl uPVC casing pipes come in two variants, each suited to different borewell depths and geological conditions.

• Deep Well Casing Pipes are engineered for greater depths and can be lowered up to 600 metres, with strength to withstand high underground pressure.
• Medium Well Casing Pipes serve moderate-depth borewells with a balance of flexibility and strength.

Casing pipe specifications to check

Yield stress is the stress a material can take before it deforms permanently. A yield stress of 55 N/mm² shows high stiffness, so the casing resists external ground pressure and keeps the well intact over the long term.

uPVC vs steel casing

uPVC offers exceptional corrosion and bacteria resistance, is lightweight for easy installation, and is non-toxic, which makes it more cost-effective and safer for clean water over time. Steel casing can corrode in groundwater and is much heavier to transport and lower into the borehole. In the United States this product is usually called PVC well casing; the role in the well is the same.

How to choose a borewell casing pipe

1. Depth: choose Deep Well casing for deep borewells and Medium Well casing for moderate depths.
2. Diameter: the casing must leave enough clearance for the submersible pump and column pipe to be lowered and pulled out. Confirm this with your pump supplier and driller.
3. Ground and water conditions: uPVC's pH 2 to 12 resistance suits a wide range of groundwater chemistry.
4. Screen section: plan screen pipes across the aquifer. See how well screens work.
5. Handling: uPVC's light weight simplifies transport and installation.

Frequently asked questions

What is the difference between Deep Well and Medium Well casing pipes?

Deep Well pipes are high-strength, designed for borewells up to 600 m to withstand deep underground pressures; Medium Well pipes balance strength and flexibility for moderate depths.

What is the lifespan of uPVC casing pipes?

Because of their durability and corrosion resistance, uPVC casing pipes have a very long lifespan and need minimal upkeep, which makes them a low-maintenance, cost-effective solution.

Can the same casing pipes be used for dewatering?

Vinyl also manufactures dewatering casing pipes designed for groundwater control in construction and excavation projects.

Ready to order? Contact Vinyl Pipes for borewell casing pipe prices, or explore pipes for the water well industry.