Last reviewed

Casing selection affects borewell stability, pump clearance, and the way each joint is lowered. This guide compares steel pipe types by intended depth, geological fit, joint form, and buying basis for Indian projects. It then provides a side-by-side table, a decision path, and an RFQ checklist. Kanpur buyers serving Unnao, Hardoi, and Bundelkhand can use the same standard-and-class logic while quoting on an ex-warehouse Kanpur basis.

Comparison at a glance

Comparison is for specification planning, not a price, life, or safe-depth schedule. Confirm the current commercial basis in a written quotation and have the well designer approve the casing and connection.
StandardWall (150 NB)Depth guidanceBest geologyCommercial basisCorrosion basis
IS 4270 Heavy5.40 mmCheck well design and joint capacityHard-rock projects when the approved design calls for itCurrent written quotationAssess water and soil chemistry
IS 1239 Heavy (Class C)5.40 mmCandidate only after a project calculationProjects whose approved casing design permits utility pipeCurrent written quotationAssess coating, allowance, and maintenance
ASTM A53 Gr B Sch 407.11 mmProject calculation requiredIndustrial / process-water projects that name A53Current written quotationAssess the actual environment
Flush-joint (FJ) CasingPer approved product drawingCheck connection and bore clearanceRestricted-clearance holes when the design calls for FJCurrent written quotationAssess the complete casing system

Ranked recommendations

  1. Rank 1: IS 4270 Heavy Class Casing Pipe

    IS 4270 Heavy Class is a casing product to evaluate when the approved well design names that standard, class, dimensions, and connection. The threaded-and-coupled system uses a separate coupling, so the purchase specification must keep pipe body, thread form, coupling, and inspection requirements together. The well designer should check collapse, tension, suspended string load, make-up, handling, bore clearance, installation loads, and corrosion allowance rather than infer capacity from the product name. Copy wall, OD tolerance, thread dimensions, gauges, tests, marking, and licence requirements from the exact purchased standard edition and approved drawing; do not carry one 150 NB value or generic percentage to every size. The bore log and aquifer-screen design determine where blank casing and screen belong. Geology or regional practice does not make this an automatic choice, and depth alone cannot approve it. The purchase order should state the required BIS licence and marking evidence, MTC or other inspection document, heat or lot traceability, coupling count, piece schedule, end protection, packing, and receiving checks. Before lowering, reconcile each piece and accessory with the approved schedule and hold damaged threads, distorted ends, unreadable identity, missing records, or other departures for written disposition. The approved installation method should define handling tools, centralisers, make-up, sanitary completion, and the response to changed bore conditions.

    Best for: Agricultural and municipal borewells whose approved design names IS 4270 Heavy casing

  2. Rank 2: IS 1239 Heavy Class (Class C) ERW Pipe

    IS 1239 Heavy Class is an ERW utility-tube product, not a purpose-made substitute for every borewell casing. If a well designer permits it, keep the exact standard edition, class, dimensions, connection detail, corrosion allowance, inspection plan, and lowering method together on the approved schedule. Do not infer a safe depth, collapse resistance, or hydrostatic requirement from the class name. The designer must calculate the actual external and internal heads, unsupported length, suspended string load, joint capacity, installation loads, and deterioration allowance. A field-welded joint and an IS 4270 threaded-and-coupled connection are different systems. Qualify the site welding procedure where welding is used, define examination and repair acceptance, and keep every joint traceable to the approved material. If the bore log, water chemistry, pump, or geology changes after drilling, return the schedule to the designer before extending the string. Purchase comparisons should use the current written offer for the exact dimensions and inspection scope rather than a percentage claimed across products.

    Best for: Projects where the approved casing calculation and connection design explicitly permit IS 1239 Heavy Class

  3. Rank 3: Flush-Joint (FJ) Casing Pipe

    Flush-joint casing uses an integrally machined male/female end so the connection remains close to the pipe OD. The reduced shoulder helps when an irregular hard-rock bore gives little clearance around the string. The joint profile, make-up torque, axial capacity, and compatible handling tools must come from the approved product drawing rather than from a generic casing description. Procurement should therefore pair the material specification with a thread drawing and an inspection plan. Ask the supplier for a thread-gauge report and keep each mating end protected until lowering. If a gravel-pack screen forms part of the same string, select its slot opening from the signed grain-size analysis and screen design. No general slot-width range is stated here because the correct opening depends on the aquifer sample and screen construction. Run the available bore log before choosing between threaded-and-coupled and flush-joint casing, and confirm that the rig can make up the specified connection without adapters.

    Best for: Restricted-clearance holes where the approved well and connection design specifically calls for flush-joint casing

  4. Rank 4: ASTM A53 Grade B Type E ERW Pipe

    ASTM A53 Grade B Type E is an ERW pipe specification used when a project drawing explicitly calls for A53 material and Schedule 40 dimensions. At 150 NB, the 7.11 mm Schedule 40 wall differs from the 5.4 mm wall shown for the heavy-class Indian products in this guide, so the purchase line must keep the standard, schedule, and connection design together. A53 is commonly considered for documented industrial groundwater work, but the project engineer still has to check collapse, tension, corrosion allowance, and joint capacity for the actual well. Do not combine this card with a square-thread heavy-wall casing description: that is a different product identity and needs its own approved drawing. The PO should state Type E, Grade B, Schedule 40, end finish, inspection scope, and the required material certificate. Where the contract requires a witnessed mill test, record the result against the heat number. Keep a joint-numbered lowering log so later inspection can trace each installed length to the supplied documentation.

    Best for: Industrial and process water borewells requiring mill test certificates

  5. Rank 5: Slotted Steel Casing (Screen Pipe)

    Slotted steel casing is a plain casing length that has been machined with openings for the water-bearing zone. The casing standard and class still identify the pipe body; the screen drawing separately controls slot pattern, opening, open area, and the length to be installed against the aquifer. Do not copy a generic slot-width range into the PO. The project geologist or well designer should select the opening from the grain-size analysis and the proposed gravel pack, then issue that value on the screen schedule. Split the order into blank and slotted lengths according to the bore log, and mark each piece so the lowering crew can place it at the intended depth. Too much removed metal can weaken the screen, while the wrong opening can admit fines or restrict inflow. Check that casing and screen use compatible ends and couplings before dispatch. Keep the slot schedule, bore log, piece marks, and material certificates together so the receiving team can verify the string before it enters the bore. Inspect the machined zone for blocked openings, burrs, distorted ends, and markings hidden by processing. The receiving checklist should compare each slotted length with the approved screen schedule without substituting a nearby opening or pattern. Hold any mismatch outside the lowering sequence until the well designer resolves it in writing.

    Best for: Gravel-pack borewells in sandy aquifers where filtration is needed

How to choose borewell pipe in Kanpur and UP

A seven-line decision path for turning the bore log and approved well design into a complete pipe RFQ:

  1. Start with the bore log, aquifer-screen design, water chemistry, pump envelope, and calculated casing loads. Do not select IS 1239 or assign a safe depth from geology and depth labels alone.
  2. Evaluate IS 4270 Heavy Class with the specified threaded-and-coupled connection when the approved design names it. Check pipe-body collapse, connection tension, corrosion allowance, bore clearance, and lowering loads for the actual well.
  3. Where coupling clearance is restricted, evaluate a flush-joint connection against its approved product drawing. The drawing must supply the connection capacity, make-up procedure, gauges, and compatible handling tools; a generic price premium cannot establish suitability.
  4. Use ASTM A53 Grade B Type E Schedule 40 only when the approved well design and purchase specification name that exact product. TPI, hydrotesting, or industrial service does not select A53 automatically. Define the required inspection document, witness points, tests, identity, and joint-numbered lowering record separately.
  5. Write the RFQ with standard and class, OD, wall thickness, plain versus slotted lengths with slot width, thread type (V or square), coupling count, length per piece, tonnage, MTC with heat traceability, and delivery basis. State whether each piece is plain, slotted, or blank casing instead of writing only the NB size.
  6. Estimate plain-pipe mass with the site weight formula W = (OD − t) x t x 0.02466, using OD and wall thickness in millimetres to obtain kilograms per metre. Apply the formula to the ordered dimensions, then add the documented mass of couplings, screens, and handling accessories. Use the resulting schedule for transport planning only; the rig supplier must confirm lifting capacity for the complete lowering assembly.
  7. Measure OD and wall using the receiving plan, match heat numbers to the MTC, and confirm slotted pieces match the marked aquifer lengths. State collection or delivery point, loading responsibility, freight basis, taxes, availability, and promised date only as written in the current quotation and order.

Bottom line

Use the standard, class, connection, screen schedule, and corrosion protection approved for the actual bore. IS 4270, IS 1239, ASTM A53, and flush-joint products are not interchangeable labels; the well designer must approve the complete casing string and its installation method. Before issuing the order, freeze a piece-by-piece casing and screen schedule tied to the bore log, pump envelope, connection drawing, calculated loads, deterioration allowance, and lowering sequence. Define how altered conditions discovered during drilling return to the designer for review. The receiving file should reconcile the PO, approved revisions, certificate, licence or marking evidence where required, heat or lot identity, dimensions, thread-gauge results, coupling count, slot schedule, packing list, and observed condition. Keep nonconforming lengths physically outside the lowering sequence until the responsible engineer records a disposition. Commercial acceptance is separate: state the offered quantity, measurement and invoice basis, packing, collection or named delivery point, loading, freight, taxes, date, and validity in the current written quotation and contract.

Frequently asked questions

Last reviewed

Need a quotation for a steel pipe requirement?

Share the grade, dimensions, quantity, delivery location, and documentation needs so the requirement can be reviewed before pricing and availability are confirmed.