Conduit pipe looks like a small line in a tender Bill of Quantities, but it is easy to get wrong. Under-measure and you absorb the shortfall. Over-measure or price too high and a competitor wins. Pick the wrong grade or forget the fittings and the margin you thought you had disappears during execution.
This guide is for contractors, estimators and procurement teams who prepare tender bids that include electrical conduit. It explains how a conduit line item is usually written, how to take off quantities from drawings, how to estimate fittings and wastage, how to build a rate you can defend, and how to get a supplier quotation that holds through the bid validity period.
How conduit appears in a BOQ
BOQ formats differ between clients, but conduit lines usually share a few features.
- Size: commonly stated as nominal diameter, such as 20mm, 25mm, 32mm or larger
- Grade or class: LMS, MMS or HMS, or a description such as "medium duty"
- Standard: typically IS 9537 Part 3, often with an ISI mark requirement
- Installation type: concealed in wall or slab, surface mounted, or underground
- Unit of measurement: running metre
- Inclusions: some BOQs include fittings, saddles and junction boxes in the pipe rate, while others list them separately
Read the BOQ notes and the technical specification together. A line that says "supply and fixing of 25mm MMS conduit including all fittings" prices very differently from one that lists fittings separately.
Step-by-step quantity take-off
Step 1: Gather the right drawings
Use the electrical layout drawings for every floor or area, the single-line diagram for sub-circuits, the riser diagram and any site plan for external runs. Make sure you are working from the latest revision.
Step 2: Break the work into zones
Divide the project into floors, blocks or areas. Measure each zone separately and add them up at the end. This makes checking easier and helps you assign quantities to phases.
Step 3: Measure horizontal runs
Trace each conduit route on the drawing from the distribution board to the outlet or fitting, using the drawing scale. Group runs by size and grade, because different circuits use different pipe sizes.
Step 4: Add the vertical drops and rises
Plan drawings show horizontal length only. For each point, add the vertical run from slab or ceiling level down to switch or socket height, or up to the fixture. In a large project these drops add up to a significant length.
Step 5: Add risers and external runs
Take riser lengths from the riser diagram and the floor-to-floor heights. For underground or external runs, measure from the site plan and add depth allowances where required. Our guide on underground conduit pipe for cable protection explains the grade and depth considerations for buried runs.
Step 6: Convert to supply lengths
Conduit is supplied in standard lengths per piece. Confirm the length with your supplier, then convert your total running metres into the number of pieces. This tells you how many bundles to order.
Step 7: Add allowance for cutting loss
Every installation produces offcuts, and not every offcut is reusable. Add an allowance for cutting loss based on your own site experience and the project's complexity. If the specification states an allowance, follow it. Do not copy a percentage from another project without checking whether the layout is similar.
Estimating fittings correctly
Fittings are where many estimates go wrong, because they are counted by number, not by length.
- Couplers: one at each joint between lengths
- Bends and elbows: one at each change of direction
- Junction boxes and inspection boxes: at branch points and pull points
- Saddles and clips: at regular spacing along surface runs, based on the specified spacing
- Reducers and end caps: where sizes change or runs end
A practical method is to count the outlets, branches and direction changes on the drawings and then apply typical ratios from similar completed projects. Our guides on calculating conduit pipes and fittings for house wiring and choosing uPVC conduit fittings explain the logic in detail. For a tender, build your own ratio from completed jobs rather than guessing.
Selecting the right grade for each line
The BOQ may specify a grade, but sometimes it only describes the application. Choose a grade that meets the specification and the site conditions, because a cheaper grade that fails inspection costs far more than the saving. Our LMS vs MMS vs HMS guide explains which grade suits which situation, and our conduit pipe size chart helps match size to cable fill.
Building a rate you can defend
A BOQ rate is more than the price of pipe. Break it into components so that nothing is missed.
- Landed material cost: pipe and fittings delivered to site, including freight
- Cutting loss allowance: the extra material you buy beyond the measured quantity
- Labour: fixing, cutting, jointing and, for concealed work, chasing and making good
- Consumables: solvent cement, clips, binding wire and similar items
- Site expenses: transport within site, storage and supervision
- Overheads and profit
- GST: plastic pipes and fittings attract 18 percent GST under HSN code 3917, which you should treat according to the tender's price basis
Check whether the tender asks for rates inclusive or exclusive of tax, and quote accordingly.
Getting a supplier quotation that survives the bid period
Many contractors lose money because the supplier's quote expires before the contract is awarded, or because the rate changes between bid and order. Protect yourself.
- Request quotations before you finalise the bid. Give the supplier your size, grade and quantity breakup.
- Ask for the rate validity period in writing. Match it to the bid validity period of the tender.
- Confirm what the rate includes. Is it ex-factory or delivered? Does it include fittings? What about taxes?
- Discuss phased delivery. If the project will need material over several months, ask whether the rate can be held across phases.
- Check certification. Confirm that the pipe meets the ISI and IS 9537 Part 3 requirement in the BOQ and that documents will be available for the material approval stage.
Our guide on material approval submittals for conduit pipe explains the paperwork consultants will ask for after the contract is awarded, so you can plan for it while bidding.
How Trity Pipes supports tender bids
Trity Pipes is a manufacturer of uPVC conduit pipes and fittings made from lead-free, high-grade virgin raw materials, certified to IS 9537 Part 3 with ISO certification. For contractors preparing a bid, our team can help with:
- A project-specific quotation based on your size, grade and quantity breakup, with the rate validity stated clearly
- Technical guidance on grade and size selection against the specification
- Certification documents you can attach to your technical bid
- Phased supply planning for projects that need material in stages
- A complete range covering pipe, bends, couplers, boxes and saddles from one source, which simplifies your estimate
You can review the full uPVC conduit pipes and fittings range to match specifications to your BOQ, and read how public projects handle compliance in our guide to conduit pipes for government infrastructure projects.
Common estimating mistakes to avoid
- Measuring only horizontal runs and forgetting vertical drops
- Ignoring cutting loss, which turns into a shortfall on site
- Pricing pipe only when the BOQ includes fittings and accessories
- Using the wrong grade because it was cheaper
- Accepting a supplier quote with no validity period
- Forgetting freight for remote sites
- Not reading the specification notes that change what is included in the rate
A worked example of how to structure a BOQ rate
Instead of one lump figure, build each line from components. For a line such as supply and fixing of MMS conduit in a given size, concealed in wall, your working sheet might list the landed material cost per metre, the cutting loss allowance, the share of fittings, the labour for fixing and chasing, consumables, site expenses, overheads, profit and tax. Keeping each component visible lets you adjust one factor, such as freight, without rebuilding the whole rate, and it gives you a clear answer if the client asks you to justify a line.
Review your rates against two checks. First, compare the total conduit value with the electrical package as a whole, since conduit usually forms a modest share and a very different ratio suggests a measurement error. Second, ask a second estimator to re-measure one floor independently and compare the results. A small mismatch is normal, while a large one means a drawing was misread.
Why contractors choose Trity Pipes for tender quotations
Tender pricing needs a supplier who answers quickly, quotes clearly and delivers what was quoted. Trity Pipes works with contractors, builders and EPC firms on exactly this basis.
- Fast, project-specific quotations. Send your BOQ extract with sizes, grades and quantities, and our team prepares a quotation you can place in your bid.
- Clear commercial terms. Rate validity, delivery basis and payment terms are stated upfront, so there are no surprises after award.
- Consistent quality. Our uPVC conduit pipe is made from lead-free, high-grade virgin raw materials to IS 9537 Part 3, so the pipe you price is the pipe you receive.
- A complete range. Trity conduit pipe in LMS, MMS and HMS grades, together with matching bends, couplers, junction boxes and saddles, lets you quote the whole line from one manufacturer.
- Delivery reach. With a plant in Uttar Pradesh and a network across 20-plus states, we can plan supply for sites across North India and beyond.
If you are comparing suppliers, our guide on how to choose a conduit pipe supplier for large projects shows the criteria worth checking, and you can request the Trity Pipes price list and a tender quotation through our team.
Timing your supplier quotation with the tender calendar
Tender timelines are short, so plan the supplier side early. Request quotations as soon as the tender documents are released, so rates are ready before you finalise the price. Keep a record of the date each quotation was received and its validity, and refresh it if the tender is extended. If the project is large, ask whether the supplier can reserve production capacity once you are awarded the contract, so material arrives when the programme needs it.
Frequently Asked Questions
How do I calculate conduit pipe quantity for a tender?
Measure each conduit route from the drawings, add vertical drops and risers, group the lengths by size and grade, add an allowance for cutting loss, and convert the total into supply lengths. Then estimate fittings by counting direction changes, joints, branches and outlets.
Should fittings be included in the conduit rate?
That depends on the BOQ. Some tenders include fittings in the pipe rate, while others list them separately. Read the BOQ description and technical notes carefully so you price exactly what is asked.
How much wastage should I allow for conduit pipe?
There is no single figure. It depends on the layout, the number of bends and the skill of the installers. Follow any allowance stated in the specification, and otherwise use data from your own completed projects rather than a generic number.
How long should a supplier quotation remain valid?
It should cover at least the bid validity period of the tender, and ideally the period until the first material order is placed. Always ask for the validity in writing.
Can Trity Pipes quote for phased delivery on large projects?
Yes. Share your size, grade and quantity breakup along with the expected delivery schedule, and our team will discuss a quotation and whether the rate can be held across phases.
What certification should conduit pipe have for a tender?
Most tenders require IS 9537 Part 3 with an ISI mark and often ISO certification for the manufacturer. Confirm the exact requirement in the BOQ and technical specification before you finalise your quote.
Preparing a tender with conduit pipe in the scope? Contact Trity Pipes with your size, grade and quantity breakup to get a project quotation with clear rate validity from an ISO-certified uPVC conduit pipe manufacturer.