Borewell casing size cannot be selected from depth alone. The approved well design should coordinate drilled diameter, lithology, aquifer and screen plan, pump envelope, annular space, collapse and handling loads, joint route, material and applicable standard. Ask the Kanpur quotation to compare only the diameters and walls accepted by that design.
What borewell size-by-depth means and what it is not
A depth schedule can organize approved casing OD, wall and screen intervals, but depth alone does not select them or a separate pump column. It is not a yield guarantee or bore-log substitute; apply the project's approved design and relevant product standards.
A Kanpur RFQ that says only "6 inch bore pipe for 200 feet" does not fix OD, wall, connection or screen metres. The approved design must state the casing dimensions and basis after coordinating the bore log, loads, pump envelope, annular works, screen schedule, installation and maintenance requirements.
IS 4270:2001 covers steel tubes used as casing, drive pipe and housing. IS 12818:2010 classifies uPVC casing as CS up to 80 m, CM above 80 m to 250 m and CD above 250 m to 450 m. Those letters are not steel wall classes and not pump HP ratings.
This page is not a hydrogeology report. It does not replace IS 2800 tube-well construction practice or a pumping test. For the steel product see IS 4270 casing. For uPVC class see IS 12818.
Who should use this depth-band guide and who should not
Use this guide to prepare a Kanpur water-well RFQ after the project designer has issued the casing and screen schedule. It does not convert a farm, JJM, PWD, industrial or depth label into a diameter and it is not a sizing guide for boiler, fire or hydraulic tube.
Buyers in Kanpur Dehat, Unnao, Hardoi and Etawah-Auraiya should transfer the designer’s actual casing schedule into the RFQ. Jal Nigam, Jal Jeevan Mission and PWD tender BOQs should name OD or NB, wall or duty, connections and blank versus slotted metres rather than depth alone.
Sugar-mill process-water wells need casing sized around the approved pump and bore design. Hydraulic and printing-cylinder shops should leave this page. Fire-system installers need hydrant pipe, not water-well casing.
If the approved design uses more than one material or section type, write each interval and engineered transition on its own RFQ line. Do not infer a mixed-material arrangement from an application or formation label.
- For: farm, JJM and PWD wells with a named depth band
- For: industrial and sugar-mill process-water bores
- Not for: IBR steam, fire hydrants or precision cylinders
- Not for: a yield promise without a bore log
Depth-band size table used on this site
This site publishes six IS 4270 nominal bores from 100 mm to 300 mm. At 150 NB the approximate OD is 168.3 mm, light-duty wall 4.5 mm, heavy-duty wall 5.4 mm. As-of date 2026-05-06, copied from /standards/is-4270.
Use the table to convert a spoken inch size into NB, OD and wall before the Kanpur RFQ. Nominal bore is shorthand. Coupling OD and pump OD decide clearance. Figures below are the site table, not a mill price list.
uPVC class still follows CS / CM / CD when the casing is plastic. GST extra at the legally applicable GST rate stated on the current quotation applies to steel invoices, ex-warehouse Kanpur. Freight to Lucknow (80 km on NH-27), Unnao (18 km) or Prayagraj (200 km on NH-19) is added on the proforma.
| Nominal bore | Approx. OD (mm) | Light duty WT (mm) | Heavy duty WT (mm) | Selection note |
|---|---|---|---|---|
| 100 mm (4") | 114.3 | 4.0 | 4.85 | Use only when selected by the approved well design |
| 125 mm (5") | 141.3 | 4.0 | 4.85 | Use only when selected by the approved well design |
| 150 mm (6") | 168.3 | 4.5 | 5.4 | Use only when selected by the approved well design |
| 200 mm (8") | 219.1 | 4.5 | 6.35 | Use only when selected by the approved well design |
| 250 mm (10") | 273.1 | 5.0 | 6.35 | Use only when selected by the approved well design |
| 300 mm (12") | 323.9 | 5.6 | 7.1 | Use only when selected by the approved well design |
Buying borewell sizes by depth in Kanpur
Buyers collect from the Kanpur steel market belt or ask for yard loading. Rig contractors around Coolie Bazar and farm buyers in Panki, Dada Nagar, Jajmau, Chakeri and Fazalganj use the same ex-warehouse basis. See drill and borewell pipes in Kanpur.
Confirm dispatch timing, destination coverage and the vehicle plan on the written quotation. The FAQ lists Uttar Pradesh, Bihar, Madhya Pradesh, Delhi NCR and Uttarakhand as a service area, not a same-day or daily-dispatch guarantee. Lucknow is 80 km via NH-27. Unnao is 18 km. Kanpur steel pipes use that same yard.
Send the RFQ with depth band, OD, wall or uPVC class, blank versus slotted metres, end finish, delivery PIN, required steel MTC and any Jal Nigam inspection scope. The written quotation should confirm document availability, TPI coordination and whether cut-to-length can be included for the rig.
How to write a depth-band RFQ from Kanpur
State planned depth, NB or OD, wall or CS/CM/CD, blank versus slotted metres, Fe 410 or Fe 450 if steel, length, end finish, coating, MTC, TPI if required and ex-warehouse Kanpur delivery. Attach the bore-log interval for screen placement.
Write the depth band in metres, not only in feet. Write OD in millimetres, not only "6 inch". Write light or heavy duty for IS 4270 or CS, CM or CD for IS 12818. Write blank metres and slotted metres as separate lines.
State the coupling quantity and protection required by the approved connection schedule. Name the inspection-document type required by the purchase order for steel and the required class or batch marking for uPVC. IBR manufacture-and-test forms do not apply to a water well: Form III-A is for steam pipes, Form III-B for tubes and Form III-C for boiler mountings and fittings.
Name the site PIN so freight can be priced. Link the finish to threaded versus bevel-end and the riser to column pipes.
- Depth band in metres, plus NB or OD and wall or uPVC class
- Length: 3 m or 6 m, total metres, blank versus slotted
- Ends: T&C with couplings, flush-joint or bevel for weld
- Documents: MTC or class mark, TPI if named; no IBR Form III-A, III-B or III-C
- Commercial: ex-works Kanpur, GST at the legally applicable GST rate stated on the current quotation, delivery PIN
Worked example: 80 m of 150 NB heavy-duty casing from Kanpur
For 168.3 mm OD and 5.4 mm wall the site formula gives 21.69 kg/m. Eighty metres weigh 1,735.2 kg before couplings. CS is a separate IS 12818 classification for uPVC casing, not this steel wall.
This site states steel mass as weight = (OD − t) × t × 0.02466 kg/m. Using the 150 NB heavy-duty row already on the IS 4270 page: OD 168.3 mm, t 5.4 mm. (168.3 − 5.4) × 5.4 × 0.02466 = 162.9 × 5.4 × 0.02466 = 21.69 kg/m.
An 80 m Kanpur farm string is then 80 × 21.69 = 1,735.2 kg or 1.7352 MT of pipe body. Couplings add mass on T&C supply. Light-duty 4.5 mm wall on the same OD is 18.18 kg/m or 1.454 MT for 80 m. The difference is 0.2812 MT on the same metres.
IS 12818 CS also stops at 80 m. If the same well stays on uPVC casing it is still a CS enquiry. A 90 m well on uPVC becomes CM. Use the pipe weight calculator to repeat the steel mass check before the PO.
What casing size works for shallow borewells below about 80 metres?
A shallow-bore casing diameter still comes from the approved bore log and well design, not a generic 150-180 mm band. Check the pump envelope, annular space, formation stability, screen placement, gravel pack, sanitary seal, material, joint, wall and retrieval clearance before requesting a quotation.
A shallow-water-well label is not a diameter rule. The design should verify the complete pump-and-cable envelope, installation and retrieval clearance, casing and coupling dimensions, annular works, bore tolerance and the blank-versus-screen schedule. Ask the contractor to price only the approved alternatives.
Do not infer steel diameter or wall from an "alluvial shallow well" label. Use IS 4270 steel casing or IS 12818 uPVC only when the approved design, site conditions, joint route, class or wall, handling plan and applicable standard support that product. Record the selected dimensions and basis on the RFQ.
Use the approved well section to state blank casing, screen, sump, seal and transition intervals. CGWB construction material can inform the responsible designer, but this page does not prescribe placement or promise water-quality or sand-control outcomes.
How should medium-depth borewells from 80 to 180 metres be sized?
A medium-depth label does not prescribe a 180-250 mm casing band, joint or wall. Use the approved bore log and well design to coordinate casing diameter, wall and joint, screen placement, formation and installation loads, pump clearance, drawdown, total dynamic head and surge.
Longer casing strings and larger seasonal drawdown can increase handling, alignment, retrieval and operating risks. Compare candidate diameters against the actual pump envelope, cable protection, gravel-pack and sanitary-seal design and retrieval clearance. A larger diameter does not by itself improve aquifer yield or justify a thinner wall.
Depth increases the importance of straightness and thread quality. A crooked joint near the top can magnify alignment problems down the string. For threaded-and-coupled casing, inspect sample make-up and coupling count before dispatch. For welded bevel-end strings, assign weld quality and coating repair responsibility explicitly.
Choose pump column pipe after static and pumping water levels, flow, losses and operating envelope are known. Calculate total dynamic head and transient cases, then select uPVC class or steel wall under the applicable standard and approved design rather than applying a generic depth margin.
What changes for deep borewells above about 180 metres?
Deep-bore casing OD, wall and joint design must follow the approved bore log, formation and collapse loads, pump envelope, annular works, handling and retrieval plan. Column pipe selection must address calculated head, transient cases, suspended load, connection strength, corrosion and maintenance without assuming a generic 250-300 mm band.
A deep-well design must quantify the relevant external and internal pressures, installation and suspended loads, connection capacity, corrosion allowance, straightness, transient cases and retrieval plan. Depth alone does not prescribe heavier steel, a threaded joint or a uPVC class.
Maintenance planning should verify retrieval clearances, lifting and handling limits, joint access, inspection records and replaceable components. Procurement should preserve the design margins and acceptance criteria stated by the responsible engineer rather than create new ones from a depth label.
For any uPVC system, stay inside the selected manufacturer’s declared limits and the approved design. If a proposed change exceeds those limits, return it to the responsible designer; do not substitute steel or a hybrid arrangement without a revised design.
How do aquifer type and screen design affect borewell pipe size?
Formation information is one input to a qualified screen and well design. The approved documents should state aperture, open area, screen and blank intervals, material, annular works, casing dimensions and acceptance criteria; this page does not map formation labels to those values.
Screen type, aperture, open area, material, placement and any filter pack must come from the bore log, test data and approved well design. Formation labels alone do not prescribe a slot width, pack gradation or open-hole arrangement.
Well development and acceptance should follow the project method and competent groundwater guidance. Procurement should reproduce the approved blank and screen schedule accurately without diagnosing later pump behaviour from a single construction observation.
For tenders, ask the drilling contractor to mark depth intervals for blank casing, screen and sump. Quote those lengths separately. This creates a transparent bill of materials and prevents disputes when the site suddenly asks for more slotted pipe after the rig is already running.
Common depth-band mistakes in Kanpur procurement
An RFQ is incomplete when it gives only depth, omits the standard and class, treats the full string as screen without a design or fails to coordinate the pump envelope with casing and coupling dimensions. Resolve those gaps against approved documents before ordering.
Convert feet to metres on the PO. Eighty metres is the CS ceiling under IS 12818:2010 clause 3.3.1. A leftover CS length from a 60 m village well does not become CM because the new bore is 90 m.
Order screen and blank intervals exactly as shown on the approved well section. Verify the offered casing and connection dimensions against the approved bore, annular works and pump envelope. Any change of connection or dimension requires renewed design review.
Coordinate casing and connection dimensions with the complete pump, cable, guard, joint and retrieval envelope. Keep the riser on a separate RFQ line from the casing and ask the designer to approve any dimensional change before ordering.
Standards that set the depth-band purchase order
Cite IS 4270:2001 for steel casing, drive pipe and housing. Cite IS 12818:2010 for uPVC CS, CM and CD. Cite IS 1239 only for surface delivery after the well head. IBR manufacture-and-test forms are not tube-well documents. Form III-A is for steam pipes, Form III-B for tubes and Form III-C for boiler mountings and fittings.
IS 4270:2001 names Fe 410 and Fe 450. Hydrotest is calculated, capped at 7 MPa and held at least 3 seconds. Straightness is 1 in 600. Joints are screwed-and-socketed, screwed flush or plain bevelled.
IS 12818:2010 covers screen and casing from 35 mm to 400 mm. CS is up to 80 m, CM above 80 m to 250 m, CD above 250 m to 450 m. Write those letters on a uPVC PO. Steel metres need MTC; uPVC metres need class marks.
Jal Jeevan Mission work still needs a constructed source well. The mission page describes rural household tap connections and source sustainability, not a casing OD. Put depth, NB and screen metres on the Kanpur RFQ.
Key points for sizing borewell pipe by depth
- The worked arithmetic uses the published 150 NB, 168.3 mm OD, 5.4 mm wall row as an example only; it is not a farm-well recommendation.
- IS 12818 CS stops at 80 m; CM runs to 250 m; CD runs to 450 m.
- Eighty metres of 150 NB heavy-duty steel at 21.69 kg/m is 1,735.2 kg or 1.7352 MT, of pipe body.
- Quotes are ex-warehouse Kanpur with GST extra at the legally applicable GST rate stated on the current quotation.
- Write blank metres and slotted metres as separate lines on the PO.