Free Earthing Tool

GI Earthing Pipe Weight Calculator

Q: What is the difference between medium and heavy class GI pipe?

Class refers to wall thickness under IS 1239. For the same nominal bore, heavy class has a thicker wall and so a higher weight per metre (e.g. 40 NB: light 3.23, medium 3.56, heavy 4.37 kg/m). Medium class is the usual choice for pipe earthing electrodes; heavy is used where extra mechanical strength is needed.

Q: Is the galvanizing included in the pipe weight?

GI pipe is customarily quoted at the IS 1239 nominal mass, which is a black-tube figure. Galvanising adds a small amount of zinc on top of that, so a galvanised pipe weighs marginally more than its nominal. Trade practice is to quote the nominal; the difference is in your favour.

A two-way converter for GI earthing pipe using the IS 1239 (Part 1) standard nominal weight — turn metres into kilograms or kilograms into metres. Choose the nominal bore (NB) and class, or switch to custom for a non-standard pipe.

Weight per metre	—

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Please read. These figures are general projections, not a design. They are estimates based on published formulae, standard weight data and assumed uniform soil conditions — real sites vary, and the numbers here may not be 100% accurate. They are offered as a working aid only. Global Electric Company accepts no liability for decisions taken on the basis of these results: always have them checked and signed off by your site engineer, electrical consultant or a qualified professional, and confirm earth resistance by measurement on site before commissioning. Where these tools and IS 3043 disagree, IS 3043 wins.

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Standard weights are the IS 1239 (Part 1) nominal mass (galvanised & black share the same value — zinc coating included). Custom sizes are theoretical estimates. For a firm price, send the spec on WhatsApp.

How earthing pipe weight is calculated

For standard sizes, this calculator uses the IS 1239 (Part 1) standard nominal weight per metre for GI tubes — the same basis the mill rolls and we quote from. The total is then:

weight per metre (kg/m) = IS 1239 nominal mass for the NB & class
total weight (kg) = kg/m × total length (m)
total length (m) = length per pipe × quantity

Galvanised and black pipe carry the same IS 1239 nominal mass (the zinc coating is included) — unlike flat strip, where the trade-standard weight excludes the coating. For a non-standard pipe, weight per metre is estimated from the cross-section:

kg/m ≈ π/4 × ( OD² − (OD − 2t)² ) × 7.85 ÷ 1000

where OD is the outside diameter (mm), t the wall thickness (mm) and 7.85 g/cm³ the density of steel. Custom results are flagged as estimates.

GI earthing pipe weight chart — IS 1239 (Part 1) nominal (kg per metre)

Standard nominal weights for GI tubes by nominal bore and class:

Nominal bore	Light — kg/m	Medium — kg/m	Heavy — kg/m
32 mm NB	2.54	3.10	3.79
40 mm NB	3.23	3.56	4.37
50 mm NB	4.08	5.03	6.17
65 mm NB	5.71	6.41	7.94
80 mm NB	6.71	8.33	9.90

IS 1239 (Part 1) standard nominal, plain-end. Galvanised & black share the same nominal mass. For sizes or specs not listed, use the calculator’s custom option or WhatsApp us.

Frequently asked questions

How much does 40mm GI earthing pipe weigh per metre?

A 40 NB (40 mm) medium-class GI pipe weighs 3.56 kg per metre as the IS 1239 (Part 1) standard nominal weight. Light class is 3.23 kg/m and heavy class is 4.37 kg/m, so a 3 m medium pipe is about 10.7 kg.

What is the difference between medium and heavy class GI pipe?

Class is the wall thickness under IS 1239. For the same nominal bore, heavy class has a thicker wall and a higher weight per metre (40 NB: light 3.23, medium 3.56, heavy 4.37 kg/m). Medium is the usual choice for pipe earthing electrodes; heavy is used where extra mechanical strength is needed.

Is the galvanizing included in the pipe weight?

Yes. The IS 1239 nominal mass is the same for galvanised (GI) and black pipe, so the standard nominal weight already accounts for it — distinct from flat strip, where the trade-standard weight excludes the zinc coating.

What length are GI earthing pipes supplied in?

GI earthing pipes are commonly supplied in 3 m lengths (2.5 m and other cut lengths on request). Enter your length per pipe and quantity above for the total weight.