02 Overview
Tube is where the wrong class costs you twice — once when it fails and again when it is replaced. We stock GP (pre-galvanised) and MS black pipe across the full nominal-bore range in light, medium and heavy class, plus square and rectangular hollow sections for gates, grills, trusses and shed frames.
02 Range
Pipes & Tubes we stock
GP tubes (pre-galvanised)
Zinc-coated before forming. Used for railings, gates, water lines, poly-house frames and anywhere the pipe stays exposed to rain.
15 mm – 150 mm NB Get priceMS tubes / ERW black pipe
Plain black ERW pipe in three classes. Medium class is standard for structural and general fabrication; heavy class for load-bearing and buried runs.
IS 1239 · light, medium, heavy Get priceMS square & rectangular hollow section
Square and rectangular tube for trusses, sheds, gates, grills and canopy frames.
SHS / RHS Get priceNeed a rate for Pipes & Tubes?
Send the sizes and quantities. We confirm stock and quote the current rate with a stated validity.
03 Reference
Sizes & weights
The charts we quote from. Standard values — confirm the exact section and grade before ordering.
GP / MS tube sizes — IS 1239 nominal bore
Reference| Nominal bore | Inch | Outside dia (mm) | Light (mm) | Medium (mm) | Heavy (mm) |
|---|---|---|---|---|---|
| 15 mm | 1/2" | 21.3 | 2.0 | 2.6 | 3.2 |
| 20 mm | 3/4" | 26.9 | 2.3 | 2.6 | 3.2 |
| 25 mm | 1" | 33.7 | 2.6 | 3.2 | 4.0 |
| 32 mm | 1¼" | 42.4 | 2.6 | 3.2 | 4.0 |
| 40 mm | 1½" | 48.3 | 2.9 | 3.2 | 4.0 |
| 50 mm | 2" | 60.3 | 2.9 | 3.6 | 4.5 |
| 65 mm | 2½" | 76.1 | 3.2 | 3.6 | 4.5 |
| 80 mm | 3" | 88.9 | 3.2 | 4.0 | 4.8 |
| 100 mm | 4" | 114.3 | 3.6 | 4.5 | 5.4 |
| 125 mm | 5" | 139.7 | 4.5 | 4.8 | 5.4 |
| 150 mm | 6" | 165.1 | 4.5 | 4.8 | 5.4 |
Wall thickness by class. Light class is colour-coded yellow at the mill, medium blue, heavy red. For structural and load-bearing work use medium or heavy.
04 Brands
Pipes & Tubes brands we supply
05 FAQ
Pipes & Tubes — your questions
What is the difference between GP tube and MS tube?
GP tube is galvanised — zinc-coated steel formed into pipe — so it resists rust without painting. MS tube is plain black steel and needs paint or primer. In the Malnad rainfall belt, GP is worth the extra for anything left outdoors.
Which pipe class should I use — light, medium or heavy?
Light class for non-structural work such as curtain rods and light railings. Medium class is the everyday structural choice. Heavy class for load-bearing columns, buried lines and high pressure.
Do you supply pipe cut to length?
Yes, for most sizes. Cutting charges depend on the section and the number of cuts — confirm at the counter when you place the order.
06 Also available
Other categories
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Build strong. Build with Sunti Steels.
Quality materials, trusted brands and reliable supply — from one counter in Sirsi, delivered across Uttara Kannada.