IS 1239 Tube 20 NB Medium — IS 1239 (Part 1)
IS 1239 Tube 20 NB Medium to IS 1239 (Part 1): outside diameter 26.9 mm, wall thickness 2.6 mm, inside diameter 21.7 mm, mass per metre 1.56 kg/m; approx. weight 1.56 kg/m.
Dimensions of IS 1239 Tube 20 NB Medium
| Symbol | Dimension | Value |
|---|---|---|
| D | Outside diameter | 26.9 mm (1.059 in) |
| T | Wall thickness | 2.6 mm (0.102 in) |
| d | Inside diameter | 21.7 mm (0.854 in) |
| m | Mass per metre | 1.56 kg/m (1.05 lb/ft) |
| m | Approximate weight | 1.56 kg/m (1.05 lb/ft) |
SKU TSH-PIPE-IS-IS1239-M-20 · Standard IS 1239 (Part 1) · weight: per metre — (D − T) × T × 0.02466
Purchase description
ERW STEEL TUBE, 20 NB, MEDIUM CLASS, 26.9 MM OD × 2.6 MM, IS 1239 (PART 1)
Available materials: IS 1239 Part 1 (black), IS 1239 Part 1 (galvanised).
Additional data
| Mass, 6 m length | 9.3 kg |
| Mass, 12 m length | 18.7 kg |
| Lengths per tonne (6 m) | 107.0 |
| Water capacity | 0.37 L/m |
| External surface | 0.085 m²/m |
Same size, other ratings
Other sizes — IS 1239 tube, Medium
Frequently asked questions
What is the difference between NPS, NB and DN?
NPS (Nominal Pipe Size) is the North American size designation in inches. NB (Nominal Bore) is the same idea used in India and the UK. DN (Diamètre Nominal) is the metric designation in millimetres. They name the same sizes: NPS 4 = 4" NB = DN 100. None of them is the actual outside diameter for sizes up to NPS 12.
What is the outside diameter of a 4 inch pipe?
A 4" (NPS 4, DN 100) pipe to ASME B36.10M has an outside diameter of 114.3 mm (4.500 in) for every schedule. Only the wall thickness and bore change with the schedule.
Why is the OD of a pipe different from its nominal size?
From NPS ⅛ to NPS 12 the nominal size is a historical bore reference, so the OD is larger than the number (a 2" pipe is 60.3 mm OD). From NPS 14 upward, the OD in inches equals the NPS: a 14" pipe is 355.6 mm OD.
What does pipe schedule mean?
A schedule number (Sch 10, 40, 80, 160) sets the wall thickness for a given pipe size. The same schedule gives a different thickness at each size. Sch 40 is 3.91 mm at 2" but 8.18 mm at 8".