MS Pipe Weight Chart (kg/m)
IS 1239 Part 1 plain-end weights for 15–150 NB — Light (A), Medium (B) and Heavy (C), including kg per 6 m trade length.
This MS pipe weight chart lists theoretical plain-end weight in kg per metre for IS 1239 ERW / mild steel pipes from 15 NB to 150 NB across Class A (Light), Class B (Medium) and Class C (Heavy). Weights use the industry formula W = (OD − WT) × WT × 0.02466 (steel density 7850 kg/m³). Example: a 50 NB (2 inch) Medium pipe weighs 5.03 kg/m — one 6 m length is about 30.2 kg.
Worked example for 50 NB Medium: OD = 60.3 mm, WT = 3.6 mm → W = (60.3 − 3.6) × 3.6 × 0.02466 = 5.03 kg/m. Click any NB row for a dedicated page with Class A/B/C detail, pieces per tonne, and GI notes.
This chart is the IS 1239 Part 1 plain-end mass table for 15 to 150 NB in Light, Medium and Heavy class. Kanpur buyers use it to turn a 6 m length count into MT before they send an RFQ. Medium 50 NB on the table is 5.03 kg/m, so one 6 m length is 30.2 kg. Offers leave the Bartan Bazar yard ex-warehouse Kanpur.
Note: Figures are theoretical plain-end MS weights. For non-standard OD or wall, use the steel pipe weight calculator. For live rates see the MS pipe price list.
Full IS 1239 Weight Chart — 15 to 150 NB
Each class column shows kg/m and kg per 6 m length. NB links open the size-specific weight page.
| NB (mm) | Inch | OD (mm) | Class A (Light) kg/m · kg/6 m | Class B (Medium) kg/m · kg/6 m | Class C (Heavy) kg/m · kg/6 m |
|---|---|---|---|---|---|
| 15 | ½ inch | 21.3 | 0.95 · 5.7 | 1.20 · 7.2 | 1.43 · 8.6 |
| 20 | ¾ inch | 26.9 | 1.40 · 8.4 | 1.56 · 9.4 | 1.87 · 11.2 |
| 25 | 1 inch | 33.7 | 1.99 · 11.9 | 2.41 · 14.5 | 2.93 · 17.6 |
| 32 | 1¼ inch | 42.4 | 2.55 · 15.3 | 3.09 · 18.5 | 3.79 · 22.7 |
| 40 | 1½ inch | 48.3 | 3.25 · 19.5 | 3.56 · 21.4 | 4.37 · 26.2 |
| 50 | 2 inch | 60.3 | 4.10 · 24.6 | 5.03 · 30.2 | 6.19 · 37.1 |
| 65 | 2½ inch | 76.1 | 5.75 · 34.5 | 6.44 · 38.6 | 7.95 · 47.7 |
| 80 | 3 inch | 88.9 | 6.76 · 40.6 | 8.37 · 50.2 | 9.95 · 59.7 |
| 100 | 4 inch | 114.3 | 9.83 · 59.0 | 12.18 · 73.1 | 14.50 · 87.0 |
| 125 | 5 inch | 139.7 | 15.00 · 90.0 | 15.97 · 95.8 | 17.88 · 107.3 |
| 150 | 6 inch | 165.1 | 17.82 · 106.9 | 18.97 · 113.8 | 21.27 · 127.6 |
How is pipe weight per metre calculated?
Plain-end steel pipe mass per metre is the cross-sectional steel area times density. The trade shortcut used across Indian mills and stockists is:
- OD = outer diameter in mm
- WT = wall thickness in mm
- 0.02466 = π × 7850 / 1,000,000 (carbon steel density constant)
For 50 NB Medium: (60.3 − 3.6) × 3.6 × 0.02466 = 5.03 kg/m. A 6 m length weighs 30.2 kg. Need a non-standard wall? Use the free weight calculator.
MS vs GI pipe weight
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).
Weight chart vs actual dispatch weight
Chart numbers are theoretical. Mills produce to dimensional tolerances; mass can vary under typical mill tolerance (commonly discussed around ±10% depending on product and PO terms). Always reconcile BOQ estimates against the mill test certificate (MTC) and agreed weighing terms at dispatch — billing follows the actual or theoretical weight basis agreed in your PO, not a reference chart.
What the IS 1239 weight chart records
The chart records theoretical plain-end carbon-steel mass for welded IS 1239 Part 1 tubes. Each row is one nominal bore. Each class column is a wall series at that bore.
The governing document is IS 1239 : Part 1 : 2004, reaffirmed 2019, committee MTD 19. Part 2 is fittings, not the tube. Do not write a fittings line on Part 1.
The figures are not mill weighbridge mass. They are not GI coated mass. They are not a pressure rating. A class name only sets wall at that NB.
The chart is not IS 3589. That standard starts at 168.3 mm OD. It is not IS 1161 structural tube. It is not an ASME schedule pipe.
Read OD and wall from the matching size page, then multiply kg/m by metres. The steel pipe weight calculator repeats the same site constant for a non-listed wall.
Who should use this chart in Kanpur
Use the chart when a Kanpur or UP BOQ names IS 1239 Light, Medium or Heavy on 15 to 150 NB. PWD and JJM bidders, plumbing contractors, fire-system installers, and sugar-mill utility crews convert lengths to MT here.
Do not use these kg/m values for IS 4270 casing, IS 3589 trunk mains, or ASME schedule pipe. Those products share some outside diameters and still use other walls.
Do not treat the chart as an IBR steam approval. The DPIIT forms index assigns Form III-A to steam pipes, Form III-B to tubes, and Form III-C to boiler mountings and fittings.
A class is not a duty. Approved hydraulic design, fire-NOC drawings, and the project specification choose the material. CPWD 2020 Clause 7.3 names mild-steel Heavy C-class IS 1239 through 150 mm only for work within that specification.
Hydraulic and printing-cylinder shops in Dada Nagar should stay on their precision or seamless pages. This table is conveyance ERW, not honed bore tube.
Selected-size mass at Medium class
The four rows below are taken from the generated weight table on this page. Use them to sanity-check a mixed Kanpur BOQ. Price bands sit on the MS pipe price list and are dated 24 May 2026.
| NB | Inch | OD (mm) | Wall (mm) | kg/m | kg per 6 m |
|---|---|---|---|---|---|
| 15 | 1/2 inch | 21.3 | 2.6 | 1.20 | 7.2 |
| 20 | 3/4 inch | 26.9 | 2.6 | 1.56 | 9.4 |
| 50 | 2 inch | 60.3 | 3.6 | 5.03 | 30.2 |
| 100 | 4 inch | 114.3 | 4.5 | 12.18 | 73.1 |
Open the NB link in the full chart for Light and Heavy on the same OD. Class wall changes with bore. Never copy a 50 NB wall onto a 15 NB take-off.
How to specify a mixed chart RFQ
A mixed Kanpur enquiry fails when it says MS pipe, 6 m, and a tonne figure with no NB split. Write one line per size and class.
- NB and OD for each line, taken from this chart.
- Class A Light, Class B Medium, or Class C Heavy, plus wall in mm.
- Material or grade designation copied from the project specification; do not replace it with a schedule grade.
- Black finish, or hot-dip zinc to the IS 4736 minimum average zinc mass of 360 g/m².
- Length: 6 m trade length, or 4 m or 5 m where the site cannot handle 6 m.
- Ends: plain end or threaded and coupled.
- Quantity in lengths and in MT, so the offer can be checked both ways.
- MTC 3.1 with heat number and BIS licence. Name SGS, Bureau Veritas, Lloyds, or TUV only when the tender wants TPI.
- Packing split by NB and heat. Keep class and finish visible on every group tag.
- Delivery basis: ex-warehouse Kanpur, plus the drop PIN if freight is required.
Send the split BOQ on the RFQ. The buying-guide desk replies to RFQs within 4 working hours.
Worked Kanpur lot from three chart rows
For a worked Fazalganj take-off, suppose the approved BOQ lists 200 lengths of 15 NB Medium, 80 lengths of 20 NB Medium, and 20 lengths of 100 NB Medium, each 6 m.
From the table, 15 NB Medium is 7.2 kg per length, so 200 lengths are 1,440 kg. 20 NB Medium is 9.4 kg per length, so 80 lengths are 752 kg. 100 NB Medium is 73.1 kg per length, so 20 lengths are 1,462 kg.
The steel mass is 1,440 + 752 + 1,462 = 3,654 kg, which is 3.654 MT. Keep the three sizes on separate packing-list lines so receipt can weigh a sample bundle from each bore.
The 24 May 2026 Medium bands are ₹58-65 per kg at 15 NB, ₹57-64 at 20 NB, and ₹51-57 at 100 NB, ex-warehouse Kanpur. The steel line is 1,440 × 58 = ₹83,520 to 1,440 × 65 = ₹93,600 on the half-inch, 752 × 57 = ₹42,864 to 752 × 64 = ₹48,128 on the three-quarter, and 1,462 × 51 = ₹74,562 to 1,462 × 57 = ₹83,334 on the 4-inch.
Those three ranges sum to ₹200,946 to ₹225,062 before GST and freight. GST 18% extra is the budgeting basis on the steel line. Add the carrier only after the PIN and load mix are known.
Common mistakes when a Kanpur buyer reads kg/m
A calculation error occurs when every size is multiplied by the 50 NB Medium figure of 30.2 kg. That hides a 7.2 kg half-inch length and overstates a truck.
A second error budgets GI from black kg/m without marking the uplift. The site GI note puts zinc at roughly 3-6% extra mass. The PO and offer should state whether billing uses theoretical or actual coated mass.
A third error treats Light and Heavy as the same OD family and skips the wall. At 100 NB the Light length is 59.0 kg and the Heavy length is 87.0 kg.
A fourth error applies the 10-tonne lot tolerance to a 3.654 MT mixed load. Clause 9.1(b) of IS 1239 Part 1:2004 gives the 10-tonne band only at that weighment floor.
A fifth error substitutes IS 1239 Medium for 2-inch Sch 40 because both sit near 60 mm OD. The walls differ. Keep the millimetre wall on the PO.
Standards, mass tolerance, and documents
Mass and wall sit in IS 1239 Part 1:2004 Clause 9.1. For a single Light tube the mass band is +10% and −8%. For a single Medium or Heavy tube it is ±10%.
For a load of 10 tonnes minimum, Light mass is +7.5% and −5%. Medium and Heavy at that floor are ±7.5%. Thickness on welded Light is + not limited and −8%; welded Medium and Heavy are + not limited and −10%.
The BIS product manual PM/1239 (Part 1)/4 of February 2022 records a 5 MPa hydrostatic test on each tube, with eddy-current testing as the alternative. Ask the MTC to show that test with the heat.
Galvanizing, when ordered, follows IS 4736. The steel-tube certification manual keeps the amended minimum average zinc mass at 360 g/m² for tubes up to 6 mm thick.
Match stencil, bundle tag, and MTC 3.1 before the truck leaves Bartan Bazar. Colour paint is not a substitute for the stamped NB and class.
Dispatch from Kanpur using this chart
The stockyard is at Bartan Bazar / Basanti Nagar, PIN 208014. Intra-city pages put Dada Nagar about 8 km, Jajmau about 10 km, and Panki about 12 km from that yard.
RP Sales dispatches daily from Kanpur across Uttar Pradesh, Bihar, Madhya Pradesh, Delhi NCR, and Uttarakhand. That service coverage does not set a fixed dispatch date for every PIN.
Stocked IS 1239 sizes follow the glossary lead-time band of 3-7 days. Mill-direct standard grades sit at 14-21 days. Name the need-by date on the RFQ.
Lucknow is about 80 km on NH-27 on the Lucknow steel pipes page. Unnao is 18 km on the Unnao city page. Both can ride a part-load when the bundle mix fits.
See steel pipes in Kanpur, MS ERW in Kanpur, and the Kanpur steel market for the same origin desk. GST 18% extra stays on the proforma as the budgeting add-on.
Key points
- The chart is theoretical plain-end IS 1239 Part 1 mass for 15-150 NB in Light, Medium and Heavy.
- Medium 50 NB is 5.03 kg/m and 30.2 kg per 6 m on this table.
- A mixed 15/20/100 NB Medium lot of 200, 80 and 20 lengths is 3.654 MT.
- Clause 9.1(b) sets single-tube Medium/Heavy mass at ±10% and the 10-tonne load band at ±7.5%.
- Kanpur offers are ex-warehouse from Bartan Bazar; GST 18% extra is the steel-line budgeting add-on.
Frequently Asked Questions
Theoretical plain-end MS pipe weight uses W = (OD − WT) × WT × 0.02466, where OD and wall thickness (WT) are in millimetres and 0.02466 is the industry constant for carbon steel at 7850 kg/m³. Example: 50 NB Medium has OD 60.3 mm and WT 3.6 mm, so W = (60.3 − 3.6) × 3.6 × 0.02466 = 5.03 kg/m.
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).
Chart weights are theoretical plain-end figures from IS 1239 dimensions. Actual dispatch weight can differ under typical mill tolerance (often quoted around ±10% on wall or mass depending on the mill and order terms). Billing and acceptance should follow the mill test certificate (MTC) and the purchase order — not this reference chart alone.
Multiply kg/m by 6. For 50 NB Medium (5.03 kg/m), one 6 m length is about 30.2 kg. Each size page on this chart lists kg per 6 m for Class A, B and C.
Yes when bundle marks, packing lists and MTC heats stay split by NB and class. Write each size as its own PO line so receipt can weigh a sample length against 5.7 kg or 87.0 kg. The MS price list prices those classes on different ₹/kg rows. Ask the loader to keep Light and Heavy bays apart on the bed.
Set the sampled length aside and record its actual length, end condition, class mark, and measured mass. Check the instrument and repeat the reading under the tender inspection plan. Then compare the result with the applicable single-tube band before accepting or raising a rejection note. A mixed-load average should not hide the sampled discrepancy.
It can reference more than one supplied line only when each size remains traceable to the relevant heat, test results, and bundle marks. Receiving should map every NB and class to the certificate entry instead of treating the first heat number as proof for the whole vehicle. Ask for separate pages when one document cannot preserve that mapping clearly.
Read kg/m the same way a Kanpur pickup does. Then add the city PIN and whether the load is dedicated or part-load. Steel pipes in Patna and steel pipes in Bareilly describe those drops from this yard. Freight sits outside the dated ₹/kg band.
No. A 5 m Medium 50 NB length is 5 × 5.03 = 25.15 kg, not 30.2 kg. State the cut length and the number of pieces. The site already offers 4 m and 5 m where a 6 m stick will not enter the plot. Billing follows the ordered length times the same kg/m.
Sources
- IS 1239 (Part 1):2004 Clause 9.1. Tolerances on thickness and mass: single-tube and 10-tonne load bands for Light, Medium and Heavy (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 Steel Tubes according to IS 1239 (Part 1):2004: NB 15-150 mm, 5 MPa hydrostatic test or eddy-current alternative (Bureau of Indian Standards)
- IS 4736 amended zinc-mass requirement. BIS steel-tube manual: minimum average zinc mass 360 g/m² for tubes up to 6 mm thick (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)
- Jal Jeevan Mission. Har Ghar Jal rural household tap-water programme (Department of Drinking Water and Sanitation, Government of India)
- Meghalaya PHED GI pipe note. Galvanized iron pipes for rural water: IS 1239 Part 1, 15-150 mm, mostly medium quality, screwed and socketed (Public Health Engineering Department, Government of Meghalaya)
Related resources
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