32 mm (1¼ inch) Pipe Weight per Meter

Reading the 32 NB weight row

The 32 NB label names a nominal bore family. Its one-and-quarter-inch trade description does not equal the listed 42.4 mm outside diameter.

All classes retain that 42.4 mm OD. Light has 2.6 mm wall, Medium has 3.2 mm, and Heavy has 4.0 mm.

The generated table expresses theoretical plain-end black-pipe mass. End preparation, couplings, zinc, paint, packing and permitted mill tolerance can move the dispatch scale away from that base.

A class letter answers the wall-series question for this standard. The approved design still controls material suitability and working pressure, together with temperature and corrosion allowance.

Compare 25 NB and 40 NB on the pipe weight chart. Use the weight calculator for a wall outside this class row.

Where 32 NB belongs and where it does not

Use 32 NB when a plumbing distribution, equipment-utility, or water-service schedule names that size under IS 1239 Part 1. Procurement should preserve the drawing revision beside the PO item.

The RP Sales fire-system guide shows 25 to 32 mm as candidate residential sprinkler-branch sizes. Fire-NOC drawings and the hydraulic calculation determine whether steel, another approved material, and a particular wall class belong there.

A PWD repair buyer should measure the existing connection and read its stencil before ordering. An apparent one-and-quarter-inch line may belong to another dimensional system.

Hydraulic and printing-cylinder shops need precision tubing rather than this conveyance row. Bore finish and ID tolerance remain outside the 32 NB class table, as do straightness and delivery condition.

Sugar-mill steam circuits and regulated boiler work require their approved material route. Water-well casing and structural CHS also need their own standard instead of a class-only substitution.

32 NB weights against Kanpur price bands

Use the first four numeric columns for quantity conversion. The two commercial columns reproduce the GI price list and MS list position dated 24 May 2026.

A whole-piece check below 1,000 kg gives 65 Light, 54 Medium, or 44 Heavy lengths. A supplier bundle may use another count, so write the planned grouping separately.

Fields for a 32 NB purchase line

Build the item from the governing drawing outward. A complete line lets the estimator and supplier share the same product identity with the carrier and receiving clerk.

• Start with 32 NB, one-and-quarter inch, and listed OD 42.4 mm.
• Record Class A 2.6 mm, Class B 3.2 mm, or Class C 4.0 mm.
• Write IS 1239 Part 1 with the edition adopted by the contract.
• Carry the project material designation without converting it into an unsupported schedule equivalent.
• Choose black tube or an IS 4736 zinc finish with 360 g/m² minimum average coating mass.
• List full 6 m pieces and any cut sizes as separate quantity lines.
• Define plain, threaded, socketed, or prepared ends from the joint detail.
• Call for MTC 3.1, heat traceability, BIS licence identity, and the mill test entry.
• Name Lloyds or TUV only where the approved ITP calls for independent inspection.
• Show packing groups, collection at Kanpur, GST 18% extra, freight basis, destination PIN, and the unloading party.

Upload the branch schedule with the RFQ. The buying guide states that RP Sales responds to RFQs within 4 working hours.

Worked 32 NB Medium load plan

The generated Medium row assigns 3.09 kg/m to 42.4 mm OD with 3.2 mm wall. It lists 18.5 kg per 6 m.

Take a hypothetical order of 100 full lengths. Multiplying 100 by 18.5 gives 1,850 kg, equal to 1.850 MT of theoretical black tube.

If loading staff band 20 lengths as one handling group, its 370 kg mass falls inside the site’s 200-500 kg stocked-bundle reference. Five identified groups then reconcile the ordered count.

Five complete 100-length lots contribute 5 × 1,850 = 9,250 kg, or 9.250 MT, before dunnage. The figure crosses the site’s 9 MT vehicle-planning marker but does not promise a carrier payload.

Applying the site 3-6% GI planning range to the 100-length mass produces 1,905.5 kg to 1,961.0 kg. The galvanising record and weighbridge slip remain the receipt evidence.

Medium black material at ₹55-62 per kg gives ₹101,750 to ₹114,700 for the dated mass. Combining GI planning mass with ₹67-75 per kg gives about ₹127,669 to ₹147,075.

A Medium offer priced by full length can be checked against 18.5 kg per stick. At the dated endpoints, one theoretical black length represents ₹1,017.50 to ₹1,147.00 before freight and GST.

Both ranges exclude freight and use GST 18% extra for budgeting. Keep the destination movement as its own commercial line.

Checks before issuing one-and-quarter-inch tube

Stores sometimes identify 32 NB from a painted rack label alone. Gauge the 42.4 mm OD, then read class and wall from markings and documents.

A 25 NB Heavy piece and a 32 NB Light piece can look similar in a crowded bay. Their listed 6 m masses are 17.6 kg and 15.3 kg, so mass alone still needs an OD check.

The individual Medium band for a full plain-end length is 16.65 kg to 20.35 kg after applying ±10%. Record scale identification and measured length before treating a deviation as material failure.

A price comparison fails when one offer includes GI and another covers black tube. Compare the matching finish column and state whether the commercial mass is theoretical or weighed.

Threaded ends can collect coating runs or suffer impact damage. Inspect gauges and sockets, then check protected ends before sending the bundle into a ceiling or sprinkler installation.

Mixed heats on one challan complicate traceability. Give each heat its own tag and keep the count visible after straps are removed.

BIS marking rules require a batch number on every 32 NB tube, not only on the bundle tag. Keep that identity readable through receipt. When the fabrication team cuts a length, its stores record should connect the remaining pieces with the parent batch.

Compliance record for 32 NB

Clause 1.1 of IS 1239 Part 1:2004 covers water, non-hazardous gas and air within this size range. Steam also appears within the standard’s 6 NB through 150 NB scope. The clause covers plain-end and screwed-and-socketed supply forms.

Clause 9.1 sets +10% and -8% mass limits for an individual Light tube. Medium and Heavy individual pieces receive a symmetrical ±10% band.

Welded Light wall may run above nominal without a stated positive cap and may fall 8% below. The corresponding negative wall tolerance for welded Medium or Heavy is 10%.

Loads weighing at least 10 tonnes use +7.5% and -5% for Light, or ±7.5% for Medium and Heavy. A 1.850 MT worked order stays on the individual rule.

Under the September 2023 BIS product manual, the acceptance route is a 5 MPa hydrostatic test or eddy-current testing as the alternative. Installed sprinkler testing follows the project acceptance procedure separately.

For GI supply, the cited BIS manual applies the IS 4736 Clause 5.1 minimum of 360 g/m². It covers tubes no thicker than 6 mm, including every 32 NB class here.

CPWD Part V Clause 7.3 uses mild-steel Heavy C-class IS 1239 pipe through 150 mm for work inside that specification. It does not select every residential branch outside CPWD work.

The same CPWD document limits pump-house support spacing for 32 NB through 125 NB pipe to 2.50 m and requires extra support at bends or heavy fittings. Use that interval only for work governed by that CPWD table.

Procuring 32 NB pipe around Kanpur

A Kanpur order can start at the Bartan Bazar stockyard in Basanti Nagar, PIN 208014. Mark the line ex-warehouse Kanpur when the buyer arranges collection.

Jajmau is about 10 km from that origin. A utility-maintenance buyer there should add the medium, corrosion exposure, joint method, and gate instructions to the 32 NB line.

Daily RP Sales dispatch from Kanpur reaches Uttar Pradesh, Bihar and Madhya Pradesh; coverage also includes Delhi NCR and Uttarakhand. The offer still needs the requested delivery date and the actual receiving PIN.

The steel-pipe Kanpur page gives the local product overview, while the Kanpur steel market guide identifies the buying area. Open MS ERW supply in Kanpur for black tube and the fire-system guide for a sprinkler enquiry.

Lucknow buyers should use the Lucknow steel-pipe route beside the ex-warehouse comparison. Separate freight and unloading from the 24 May 2026 material band; list any TPI visit independently.

PWD and JJM teams should cite the tender schedule. Sugar-mill buyers should name the utility, while cylinder shops should move to the dimensional route built for finished bores.

Key points

• The 32 NB class family uses one 42.4 mm outside diameter.
• Medium wall is 3.2 mm, producing 3.09 kg/m and 18.5 kg per 6 m.
• A 100-length Medium order represents 1.850 MT of theoretical black steel.
• The dated Medium price bands are ₹55-62 per kg for MS and ₹67-75 for GI.
• The approved drawing selects 32 NB service and material, plus the joint and class.

Sources

• IS 1239 (Part 1):2004, Clauses 1.1 and 9.1. Product scope plus wall and mass tolerance rules applied to the 32 NB class row (Bureau of Indian Standards)
• IS 1239 : Part 1 : 2004, active standard listing. BIS preview identifying tube services, supply forms, and nominal bores through 150 mm (Bureau of Indian Standards e-sale)
• PM/1239 (Part 1)/5, Sep 2023. Official certificate fields, per-tube batch marking, and the hydrostatic or eddy-current acceptance choice (Bureau of Indian Standards)
• IS 4736:1986, Clause 5.1, Amendment 3 (2002). Zinc-coating amendment setting 360 g/m² as the minimum average mass for applicable tubes (Bureau of Indian Standards)
• CPWD Wet Riser and Sprinkler Systems specification:2020, Clause 7.3 and the support-spacing table. Heavy C-class pipe selection within covered fire work and the 2.50 m pump-house support row (Central Public Works Department, Government of India)

Related resources

• IS 1239 weight chart
• 25 NB mass guide
• Fire-system pipe selection
• GI pipe price bands
• Lucknow delivery page