100 mm (4 inch) Pipe Weight per Meter
Class B Medium = 12.18 kg/m · OD 114.3 mm · Light 9.83 / Heavy 14.50 kg/m
100 mm (4 inch) MS Pipe Weight — IS 1239 Class A / B / C
A 100 NB (4 inch) MS pipe weighs 12.18 kg per metre in Class B (Medium) — 9.83 kg/m in Class A and 14.50 kg/m in Class C per IS 1239.
Outside diameter is 114.3 mm. Figures below are theoretical plain-end weights. Compare all sizes on the full pipe weight chart.
At 100 NB, the IS 1239 outside diameter is 114.3 mm. A Medium 6 m stick contributes 73.1 kg because the row gives 12.18 kg/m. Kanpur fire-system and PWD buyers can use that mass when an approved drawing names this tube, then apply the dated ₹/kg band. The commercial basis is ex-warehouse Kanpur.
100 NB weight by class
| Class | Wall (mm) | kg/m | kg per 6 m | Approx. pieces / tonne |
|---|---|---|---|---|
| Class A (Light) | 3.6 | 9.83 | 59.0 | 16 |
| Class B (Medium) | 4.5 | 12.18 | 73.1 | 13 |
| Class C (Heavy) | 5.4 | 14.50 | 87.0 | 11 |
Pieces per tonne ≈ round(1000 ÷ kg per 6 m length). Use for rough logistics only; actual count depends on exact length and mill mass.
GI pipe weight note for 100 NB
Galvanized (GI) pipe is MS pipe with a zinc coating. Zinc typically adds roughly 3–6% mass over the plain-end MS weight depending on coating class and surface area. Use the MS figures below as the base; for GI orders expect a small uplift, or confirm coated mass on the mill test certificate (MTC).
Formula with 100 NB dimensions
W = (OD − WT) × WT × 0.02466, with OD = 114.3 mm for this size:
- Class A: (114.3 − 3.6) × 3.6 × 0.02466 = 9.83 kg/m
- Class B: (114.3 − 4.5) × 4.5 × 0.02466 = 12.18 kg/m
- Class C: (114.3 − 5.4) × 5.4 × 0.02466 = 14.50 kg/m
Ordering this size
For wholesale supply of 100 NB (4 inch) MS or GI pipe from Kanpur, check the MS pipe price list for current rate bands, then send NB, class (A/B/C), length and tonnage via the RFQ form. We supply with mill test certificates. Thickness class reference: IS 1239 class thickness chart.
What 100 NB pipe weight means
100 NB is the 4-inch row. The steel OD is 114.3 mm on Light, Medium and Heavy. That OD family also appears on schedule pipe and on IS 4270 casing, with other walls.
IS 1239 Part 1 walls on this bore are Light 3.6 mm, Medium 4.5 mm, and Heavy 5.4 mm. Those walls are not Sch 40 (6.02 mm) and not IS 4270 light-duty 4.0 mm.
The kg/m value is theoretical plain-end mass for this class. It does not set allowable pressure. Size, wall, material stress, and the design code do that.
The site fire-system BOQ example includes 100 NB or 80 NB lateral feeds. That example does not make 100 NB the top of IS 1239; 125 NB and 150 NB continue on the parent chart.
Use the pipe weight chart for 80 NB and 125 NB neighbours. Use the class thickness chart when a PWD BOQ prints millimetres only.
Who should specify 100 NB in Kanpur
Specify 100 NB IS 1239 when the water, sewage, or fire drawing names 100 mm NB class tube. A Panki PWD or factory buyer should attach that drawing line to the enquiry.
The site fire-system BOQ uses 100 mm or 80 mm NB for hydrant lateral feeds and larger sizes for its pump-room ring example. CPWD 2020 Clause 7.3 specifies mild-steel Heavy C-class IS 1239 through 150 mm only for work within that specification.
Do not buy IS 1239 100 NB as IS 4270 casing. Casing at 100 mm uses its own light-duty and heavy-duty walls (4.0 mm and 4.85 mm on the site casing table). Send casing to drill-borewell pipes in Kanpur.
Do not buy this row as 4-inch Sch 40 A106. That seamless wall is 6.02 mm and 16.07 kg/m on the schedule chart. An IBR steam-pipe purchase instead follows its approved material and Form III-A.
Sugar-mill raw-water and ash-water headers may use 100 NB ERW when the utility spec says IS 1239. Boiler banks stay on SA192 or SA210.
100 NB wall-class weights and Kanpur rates
Mass is this row. Rupees are the 24 May 2026 MS and GI bands, ex-warehouse Kanpur. Per-kg rates fall as NB rises, while stick mass rises.
| Class | Wall (mm) | kg/m | kg per 6 m | MS ₹/kg | GI ₹/kg |
|---|---|---|---|---|---|
| Light (A) | 3.6 | 9.83 | 59.0 | 48-54 | 58-66 |
| Medium (B) | 4.5 | 12.18 | 73.1 | 51-57 | 62-70 |
| Heavy (C) | 5.4 | 14.50 | 87.0 | 54-62 | 68-76 |
The largest whole-stick counts below 1,000 kg are 16 Light, 13 Medium, or 11 Heavy. Thirteen Medium sticks equal 13 × 73.1 = 950.3 kg.
RFQ line for 100 NB class tube
A 4-inch line that says only fire pipe and Heavy still omits the governing standard and wall. It also lacks coating. End preparation and inspection documents are missing too. Lock each field.
- Product: IS 1239 Part 1 tube, 100 NB / 4 inch, OD 114.3 mm.
- Class: Light 3.6 mm, Medium 4.5 mm, or Heavy 5.4 mm. A fire lateral copies the approved drawing and project specification.
- Material or grade: copy the project designation beside IS 1239 rather than substituting an A106 schedule description.
- Finish: black, or IS 4736 with minimum average zinc mass of 360 g/m². Fire red paint is a separate coat line.
- Length: 6 m, or cut-to-length for a pump-room header.
- Ends: PE or bevel for weld, T&C only when the hydrant spec uses threads.
- Quantity: lengths and MT. One hundred Medium sticks are 7.310 MT.
- MTC 3.1, heat, BIS licence, hydrostatic or eddy-current test record. TPI (SGS, Bureau Veritas, Lloyds, TUV) when the fire NOC package names it.
- Packing: class-separated bundles with heat tags. Match end protection to the ordered preparation.
- Ex-warehouse Kanpur, GST 18% extra, Panki or site PIN for the truck.
Worked 100 NB lots: 12 sticks and 100 sticks
For a worked Panki take-off, suppose the approved drawing lists 12 lengths of 100 NB Heavy GI. The black Heavy stick is 87.0 kg, so twelve sticks are 12 × 87.0 = 1,044 kg, or 1.044 MT black.
Apply the 3-6% zinc note: 1,044 × 1.03 = 1,075.3 kg to 1,044 × 1.06 = 1,106.6 kg coated. If a separate Medium packing group holds 10 lengths, its theoretical black mass is 10 × 73.1 = 731 kg.
One hundred Medium lengths are 100 × 73.1 = 7,310 kg, which is 7.310 MT of theoretical tube on the vehicle plan. That lot is below the 10-tonne Clause 9.1(b) floor, so single-tube ±10% remains the mass rule.
Black Medium at ₹51-57 per kg (24 May 2026) values 7,310 kg at 7,310 × 51 = ₹372,810 to 7,310 × 57 = ₹416,670. Heavy black at ₹54-62 on the 1,044 kg example is 1,044 × 54 = ₹56,376 to 1,044 × 62 = ₹64,728.
GI Heavy on that 12-length feed at ₹68-76 per kg on the coated band is 1,075.3 × 68 = ₹73,120 to 1,106.6 × 76 = ₹84,102 before GST. Put the fire class on the RFQ with the drawing attached.
Failure modes on 4-inch class pipe
A specification mismatch happens when a 4-inch Sch 40 seamless length is issued against an IS 1239 Medium PO. Gauge wall: 6.02 mm versus 4.5 mm. Mass per metre is 16.07 kg versus 12.18 kg.
Red paint does not prove a 100 NB fire line has the ordered class. If an approved drawing or CPWD-scoped specification calls for Heavy C-class, a 59.0 kg Light stick does not meet that wall line.
A receiving error can place IS 4270 casing at 114.3 mm OD with a water-main line. Check the standard stencil and wall, not only the OD.
For Medium, subtracting 10% from 73.1 kg gives 65.79 kg; adding 10% gives 80.41 kg. The 87.0 kg and 59.0 kg theoretical values belong to Heavy and Light table rows, but markings must confirm either class.
Forklift contact on the end can flatten a bevel land. Fit protectors and place lifting points away from prepared ends before a Panki or Jajmau run.
Standards that sit behind 100 NB mass
Clause 9.1(b) of IS 1239 Part 1:2004 is the mass clause used on this page. Clause 9.1(a) lets welded Medium and Heavy wall run + not limited and −10%.
At a 10-tonne weighment the Medium and Heavy mass band is ±7.5%. A 7.310 MT hundred-length Medium lot is below that floor. A theoretical 150-length count is 150 × 73.1 = 10,965 kg, but the tighter load band applies only when the qualifying delivered weighment is at least 10 tonnes.
A 5 MPa hydrostatic test, or eddy-current testing as the alternative, remains the product-manual test. A project may also specify an installed-system hydro test. Keep that site acceptance step separate from the mill test record.
IS 3589 starts at 168.3 mm OD. Do not stretch this 114.3 mm row into a trunk-main standard. See IS 1239 vs IS 3589.
The IBR forms index assigns III-A to steam pipes, III-B to boiler tubes, and III-C to boiler mountings and fittings. Those form labels do not convert an IS 1239 water or fire tube into an IBR item.
Buying 100 NB pipe in Kanpur
Panki is about 12 km from Bartan Bazar. A factory fire-system or PWD buyer there should send the 100 NB drawing and class with the enquiry. Add the finish and site receiving constraints.
Jajmau is about 10 km from the yard, while Dada Nagar is about 8 km. Borewell contractors who want 100 mm casing must switch product family on drill-borewell pipes in Kanpur.
Fire installers should read fire-system pipe before selecting the pipe material. GI pipes in Kanpur covers zinc orders, while PWD bidders can use the PWD tender checklist.
Outstation 4-inch lots to Lucknow, Prayagraj, or Patna put 59.0-87.0 kg on each 6 m stick, depending on class. State the PIN, access limits, and unloading method on the RFQ.
RP Sales operates daily dispatch across Uttar Pradesh, Bihar, Madhya Pradesh, Delhi NCR, and Uttarakhand from Kanpur. The buyer still supplies a required date and site contact for this heavier 100 NB load.
Key points
- At 100 NB, Medium means 114.3 mm OD, 4.5 mm wall, and 73.1 kg per 6 m.
- The theoretical mass for 100 Medium lengths is 7.310 MT.
- The 24 May 2026 MS Medium planning band is ₹51-57 per kg ex-warehouse Kanpur.
- Twelve Heavy lengths start at 1,044 kg black before the 3-6% GI allowance.
- Fire-service class and material come from the approved drawing and applicable project specification.
Frequently Asked Questions
A standard 6 m length of 100 NB (4 inch) MS pipe weighs about 59.0 kg in Class A (Light), 73.1 kg in Class B (Medium), and 87.0 kg in Class C (Heavy), based on theoretical plain-end mass from IS 1239 dimensions.
Per IS 1239, 100 NB (4 inch) plain-end MS pipe is 9.83 kg/m in Class A, 12.18 kg/m in Class B (Medium), and 14.50 kg/m in Class C. Formula: W = (OD − WT) × WT × 0.02466 with OD 114.3 mm.
Use the joint detail from the approved drawing. Write plain end or bevelled end for the specified welded joint, including any required end preparation. Use threaded and coupled only when the governing specification permits that joint. Put the end condition on the PO, packing list, and MTC description so receipt does not rely on a rack label.
Nine tonnes is 9,000 kg. 9,000 ÷ 73.1 = 123.1, so 123 Medium sticks are 123 × 73.1 = 8,991.3 kg theoretical. That ignores dunnage, GI uplift, and axle limits. Give the carrier the stick count, the class, and whether the finish is GI. Do not treat 123 as a guaranteed payload.
They can, because all three rows use 114.3 mm OD, but their walls and stick masses differ. Separate the classes by tags and packing-list lines. A receiving team should not identify class from diameter alone. Give the carrier each group mass and secure them so a Heavy bundle cannot obscure or damage the lighter group.
Match the standard, 100 NB size, class, finish, heat or batch reference, BIS licence details, and test record across both documents. Also reconcile the ordered end condition and length. If the truck carries casing or schedule pipe at the same OD, preserve separate markings because 114.3 mm alone cannot identify the purchased product.
Start with the matching plain-end class mass, then compare the offer’s stated GI billing basis with the actual documents. The site planning note adds roughly 3-6% for zinc, but a delivery may be billed from actual coated weighment. Check the galvanising certificate, length count, and tare basis before treating the planning uplift as the invoice mass.
Sources
- IS 1239 (Part 1):2004 Clause 9.1. Tolerances on thickness and mass, including the 10-tonne load band (Bureau of Indian Standards)
- IS 1239 : Part 1 : 2004 (reaffirmed 2019). Steel Tubes, Tubulars and Other Wrought Steel Fittings: Part 1 Steel Tubes, active listing, committee MTD 19 (Bureau of Indian Standards e-sale (BSB Edge))
- PM/1239 (Part 1)/4 Feb 2022. Product Manual for IS 1239 (Part 1):2004: NB 15-150 mm, 5 MPa hydrostatic test or eddy-current alternative (Bureau of Indian Standards)
- CPWD General Specifications for Electrical Works, Part V, 2020, Clause 7.3. Wet-riser and sprinkler pipe work: mild-steel Heavy C-class IS 1239 up to 150 mm within CPWD scope (Central Public Works Department, Government of India)
- Indian Boiler Regulations, 1950. Forms index: III-A steam pipes, III-B tubes, III-C boiler mountings and fittings (Central Boilers Board, Government of India)
- IS 4736 amended zinc-mass requirement. Minimum average zinc mass 360 g/m² for tubes up to 6 mm thick (Bureau of Indian Standards)
- IS 4270:1992. Steel tubes used for water wells: 100 mm NB casing is a different product family (Bureau of Indian Standards)
Related resources
Need 100 NB pipe in bulk?
Quote Class A/B/C, length and quantity — wholesale reply from RP Sales, Kanpur.
Get a Wholesale Quote