50 mm (2 inch) Pipe Weight per Meter
Class B Medium = 5.03 kg/m · OD 60.3 mm · Light 4.10 / Heavy 6.19 kg/m
50 mm (2 inch) MS Pipe Weight — IS 1239 Class A / B / C
A 50 NB (2 inch) MS pipe weighs 5.03 kg per metre in Class B (Medium) — 4.10 kg/m in Class A and 6.19 kg/m in Class C per IS 1239.
Outside diameter is 60.3 mm. Figures below are theoretical plain-end weights. Compare all sizes on the full pipe weight chart.
50 NB is the 2-inch IS 1239 size. Steel OD is 60.3 mm on Light, Medium and Heavy. Medium class on this row weighs 5.03 kg/m, so a 6 m length is 30.2 kg. Jajmau hose-reel and factory-water buyers convert that length mass into MT, then apply the 24 May 2026 ₹/kg band. Offers leave the Kanpur yard ex-warehouse.
50 NB weight by class
| Class | Wall (mm) | kg/m | kg per 6 m | Approx. pieces / tonne |
|---|---|---|---|---|
| Class A (Light) | 2.9 | 4.10 | 24.6 | 40 |
| Class B (Medium) | 3.6 | 5.03 | 30.2 | 33 |
| Class C (Heavy) | 4.5 | 6.19 | 37.1 | 26 |
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 50 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 50 NB dimensions
W = (OD − WT) × WT × 0.02466, with OD = 60.3 mm for this size:
- Class A: (60.3 − 2.9) × 2.9 × 0.02466 = 4.10 kg/m
- Class B: (60.3 − 3.6) × 3.6 × 0.02466 = 5.03 kg/m
- Class C: (60.3 − 4.5) × 4.5 × 0.02466 = 6.19 kg/m
Ordering this size
For wholesale supply of 50 NB (2 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 50 NB pipe weight means
50 NB is the 2-inch row. The steel OD is 60.3 mm on every IS 1239 class. That OD family also appears on ASME schedule pipe and on IS 1161 circular tube, with other walls.
IS 1239 Part 1 walls on this bore are Light 2.9 mm, Medium 3.6 mm, and Heavy 4.5 mm. Light here shares the 2.9 mm wall with 40 NB Light and still differs in OD and kg/m.
The kg/m value is the plain-end theoretical mass for this 50 NB class. It does not set allowable pressure. Allowable pressure comes from size, wall, material stress, and the design code together.
The site fire-system table lists 50 mm NB as the hose-reel feed at each landing. That typical NB is not a licence to pick class from habit. The approved fire drawing still owns the wall.
Open the pipe weight chart for 40 NB and 65 NB neighbours. Open the class thickness chart when a PWD BOQ prints millimetres only.
Who should specify 50 NB in Kanpur
Specify 50 NB IS 1239 when the water, air, or fire drawing names 50 mm NB class tube. A Jajmau factory buyer should attach that drawing line to the enquiry.
The site fire-system BOQ uses 50 mm NB for hose-reel feeds and names IS 1239 Heavy class or GI on that typical row. Inside CPWD electrical-works fire pipe, Clause 7.3 of the 2020 Part V book names mild-steel Heavy C-class IS 1239 through 150 mm.
Do not buy this row as 2-inch Sch 40 A106. That seamless wall is 3.91 mm and 5.44 kg/m on the schedule chart. Medium class here is 3.6 mm and 5.03 kg/m.
Do not buy IS 1239 50 NB as IS 1161 structural CHS just because both can sit at 60.3 mm OD. Send a handrail or column member to the structural pages. Send casing to drill-borewell pipes in Kanpur; IS 4270 starts at 100 mm.
Sugar-mill raw-water laterals may use 50 NB ERW when the utility spec says IS 1239. Boiler banks stay on SA192 or SA210. Hydraulic barrels stay on DIN 2391 / EN 10305.
50 NB wall-class weights and Kanpur rates
Mass is this row. Rupees are the dated 24 May 2026 MS and GI bands from the Kanpur lists. Per-kg rates sit below the 40 NB band while stick mass rises.
| Class | Wall (mm) | kg/m | kg per 6 m | MS ₹/kg | GI ₹/kg |
|---|---|---|---|---|---|
| Light (A) | 2.9 | 4.10 | 24.6 | 50-57 | 61-69 |
| Medium (B) | 3.6 | 5.03 | 30.2 | 53-60 | 65-73 |
| Heavy (C) | 4.5 | 6.19 | 37.1 | 57-65 | 71-79 |
The largest whole-stick counts below 1,000 kg are 40 Light, 33 Medium, or 26 Heavy. Thirty-three Medium sticks equal 33 × 30.2 = 996.6 kg. Black rows for every NB sit on the MS pipe price list.
RFQ checklist for 50 NB hose-reel and water tube
A 2-inch line that says only fire pipe and Heavy still omits the governing standard and wall. Coating and end preparation are missing too. Lock each field.
- Product: IS 1239 Part 1 tube, 50 NB / 2 inch, OD 60.3 mm.
- Class: Light 2.9 mm, Medium 3.6 mm, or Heavy 4.5 mm. A hose-reel feed copies the approved fire drawing.
- Grade line: copy the project metal designation next to IS 1239; do not replace it with an A106 schedule phrase.
- Surface: black, or IS 4736 zinc at 360 g/m² average minimum. Fire-red paint is a later coat, not a class proof.
- Length: 6 m, or cut-to-length for a landing hose-reel drop.
- Ends: PE or bevel for weld, T&C only when the hose-reel spec uses threads.
- Quantity: lengths and MT. Forty-two Medium sticks are 1.268 MT.
- Papers: MTC 3.1, heat, BIS licence, and the hydro or eddy-current record. Book TPI only when the fire NOC names the agency.
- Pack: keep classes in separate bundles with heat tags. Fit end caps that match the ordered mouth.
- Ex-warehouse Kanpur, GST 18% extra, Jajmau or site PIN for the truck.
Worked 50 NB Medium lot of 42 lengths
For a worked Jajmau hose-reel take-off, suppose the approved landing schedule lists 42 lengths of 50 NB Medium at 6 m. One stick is 30.2 kg. Forty-two sticks are 42 × 30.2 = 1,268.4 kg, which is 1.268 MT.
If loading divides the order into a 28-length group and a 14-length group, their masses are 845.6 kg and 422.8 kg. Floor(1000 ÷ 30.2) gives 33 sticks below one theoretical tonne, at 996.6 kg.
Seven identical 42-length black groups place 7 × 1,268.4 = 8,878.8 kg, or 8.879 MT, into a vehicle plan. Compare that theoretical tube mass with legal loading, then let the carrier allow for restraints.
GI on those 42 lengths adds the site 3-6% zinc. Planning coated mass is 1,268.4 × 1.03 = 1,306.45 kg to 1,268.4 × 1.06 = 1,344.50 kg, or 31.11 kg to 32.01 kg per stick.
Applying the dated Medium endpoints to 1,268.4 kg produces ₹67,225 at ₹53/kg and ₹76,104 at ₹60/kg. The GI masses paired with ₹65/kg and ₹73/kg produce ₹84,919 to ₹98,149.
The steel-line budget carries GST 18% extra. Jajmau is about 10 km from the yard; a delivered offer still needs the street and gate. File that split on the RFQ.
Inspection points on 2-inch class pipe
A receiving team can confuse 50 NB and 65 NB in a mixed fire load because both appear in the same hose-reel and landing-valve crate list. OD is 60.3 mm versus 76.1 mm.
Medium 50 NB and Medium 65 NB both use a 3.6 mm wall. Weigh the stick: 30.2 kg versus 38.6 kg. Do not accept a 2½-inch crate against a 50 NB PO.
A Medium stick can vary from 27.18 kg after the 10% deduction to 33.22 kg after the 10% addition. A 24.6 kg stick matches the Light theoretical row and falls below that Medium band; hold it for marking checks.
A specification mismatch happens when a 2-inch Sch 40 seamless length is issued against an IS 1239 Medium PO. Gauge wall: 3.91 mm versus 3.6 mm. Mass per metre is 5.44 kg versus 5.03 kg.
Red paint does not prove a 50 NB hose-reel line has the ordered class. If an approved drawing or CPWD-scoped specification calls for Heavy C-class, a 24.6 kg Light stick does not meet that wall line.
Compliance notes for 50 NB mass
Welded Medium wall under Clause 9.1(a) may run + not limited and −10%. The lower limit from a 3.6 mm nominal wall is 3.24 mm. A 2.9 mm Light reading is below that limit and should put the length on hold.
Medium mass on a 10-tonne weighment tightens to ±7.5%. A 1.268 MT Jajmau drop stays on the single-tube ±10% rule.
The February 2022 product manual tests every tube by a 5 MPa hydrostatic test, or by eddy-current testing as the alternative. Put the test actually run on the 50 NB MTC.
NBC 2016 Part 4, as already stated on the IS 1239 standard page, points wet-riser and hydrant pipe to Heavy class GI. Light class is not acceptable on that fire service. Hose-reel class still follows the approved fire drawing.
IS 4736 coating on 2.9-4.5 mm walls still uses the 360 g/m² amended minimum. File the zinc certificate with the tube MTC; paint colour is not coating-mass evidence.
Buying 50 NB pipe in Kanpur and Jajmau
Jajmau sits about 10 km east of the Bartan Bazar yard. A factory hose-reel or process-water buyer there should send the 50 NB drawing and class with the enquiry.
Daily trucks leave Kanpur for Uttar Pradesh, Bihar, Madhya Pradesh, Delhi NCR, and Uttarakhand. Send the required date with a 50 NB order; route coverage is not a fixed delivery promise.
Hose-reel crews should open the fire-system pipe guide before they pick the metal. Zinc orders belong on GI pipes in Kanpur. A PWD package can follow the PWD tender checklist.
Dada Nagar cylinder shops, about 8 km from the yard, should keep 50 NB conveyance tube off a honed-bore RFQ. Precision work belongs on the hydraulic pages.
Outstation 2-inch lots to Lucknow or Bareilly put 24.6-37.1 kg on each 6 m stick, depending on class. State the PIN and unloading method with the count.
Key points
- At 50 NB, Medium means 60.3 mm OD, 3.6 mm wall, and 30.2 kg per 6 m.
- Forty-two Medium lengths total 1,268.4 kg before the GI coating allowance.
- On 24 May 2026, the ex-warehouse Kanpur MS Medium band was ₹53-60 per kg.
- 2-inch Sch 40 wall is 3.91 mm and 5.44 kg/m, not the 3.6 mm Medium class wall.
- The site fire-system table lists 50 mm NB as a typical hose-reel feed; class still follows the approved drawing.
Frequently Asked Questions
A standard 6 m length of 50 NB (2 inch) MS pipe weighs about 24.6 kg in Class A (Light), 30.2 kg in Class B (Medium), and 37.1 kg in Class C (Heavy), based on theoretical plain-end mass from IS 1239 dimensions.
Per IS 1239, 50 NB (2 inch) plain-end MS pipe is 4.10 kg/m in Class A, 5.03 kg/m in Class B (Medium), and 6.19 kg/m in Class C. Formula: W = (OD − WT) × WT × 0.02466 with OD 60.3 mm.
The tag links 2-inch tubes to their packing list and MTC when paint or wrapping hides the stencil. Leave that tag on the bundle until stores issues the last stick. If two heats share a vehicle, use separate tag references so a later certificate check can trace the affected 50 NB group.
One truck can carry both finishes when each has its own PO line, bundle tag, mass basis, and certificate set. Keep bare MS off a finished GI surface on the bed. Split the two counts on the challan because the dated ₹/kg bands differ, even when both groups use Medium class.
Keep each cut length on a separate quantity row and multiply its total metres by 5.03 kg/m. Add those theoretical masses, then apply the dated Medium ₹/kg band once. The packing list should also separate full sticks from cut pieces, so receiving can reconcile metres without treating every item as the 30.2 kg full-length value.
When the delivery sits under the 10-tonne floor, test each sampled Medium tube against the ±10% mass band. A passing group average does not hide one light stick. Set the piece aside, check length and ends, write the measured mass, and raise the gap against the PO and Clause 9.1(b) before acceptance.
No. IS 1161 structural tube can share the 60.3 mm OD and even a 3.6 mm wall, but it is a different standard, grade family, and test package. Write IS 1239 and the class when the line is water, air, or hose-reel duty. Write IS 1161 and the YSt grade when the member is a column, handrail, or truss chord.
Sources
- IS 1239 (Part 1):2004 Clause 9.1. Single-tube Medium ±10% and 10-tonne ±7.5% mass bands applied to the 30.2 kg stick (Bureau of Indian Standards)
- IS 1239 : Part 1 : 2004 (BIS preview). Part 1 steel-tube scope and class tables used for the 60.3 mm OD 50 NB row (Bureau of Indian Standards (BSB Edge preview))
- PM/1239 (Part 1)/4 Feb 2022. Licensed-tube leak-tightness for the 50 NB range: 5 MPa hydrostatic test or eddy-current alternative (Bureau of Indian Standards)
- CPWD General Specifications for Electrical Works, Part V, 2020, Clause 7.3. Mild-steel Heavy C-class IS 1239 through 150 mm inside CPWD wet-riser and sprinkler scope (Central Public Works Department, Government of India)
- NBC 2016, Part 4. Fire and Life Safety: Heavy class GI pointed for wet-riser and hydrant pipe on the IS 1239 page (Bureau of Indian Standards)
- IS 4736 amended zinc-mass requirement. 360 g/m² minimum average zinc mass kept for 2.9-4.5 mm 50 NB walls (Bureau of Indian Standards)
- IS 1161:2014. Steel tubes for structural purposes: a different product family at the same 60.3 mm OD (Bureau of Indian Standards)
- 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)
Related resources
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