Product
BS 4568 Class 3 and IS 9537 Part 2 conduit, plus trade weight chart
Conduit runs off our ERW lines from prime soft mild steel coil. What separates it is the finish and the tolerance on the bore, because conduit is pulled through rather than built into.
It is used for electrical cable and wiring runs, light structural duty, furniture frames and architectural fittings. Sizes range from 16 mm to 50 mm outside diameter to BS 4568 Class 3 and IS 9537 Part 2, supplied in standard 3.75 m lengths threaded at both ends with couplers fitted on enquiry.
The section is also widely traded by gauge across round, square, rectangular and special profiles rolled from the same strip width — the complete trade weight chart for 20 ft (6 m) lengths is given below.
Specifications
Figures as published in our catalogue. Tolerances are held to the standard named on each table.
BS 4568-1 Class 3 and IS 9537 (Part 2)
| Nominal size mm | Outside dia mm | Wall thickness (mm) | kg/m | |
|---|---|---|---|---|
| BS 4568 Cl. 3 | IS 9537 Pt 2 | |||
| 16 | 16.0 | 1.40 | — | 0.504 |
| 20 | 20.0 | 1.60 | 1.40 – 1.60 | 0.726 |
| 25 | 25.0 | 1.60 | 1.40 – 1.80 | 0.923 |
| 32 | 32.0 | 1.60 | 1.40 – 1.80 | 1.200 |
| 40 | 40.0 | — | 1.60 – 2.20 | 1.515 |
| 50 | 50.0 | — | 1.60 – 2.20 | 1.910 |
Outside diameter is the nominal size; BS 4568 holds it to ±0.3 mm and IS 9537 applies a minus-only tolerance. BS 4568 conduit is supplied in 3.75 m lengths threaded to ISO metric form at both ends. Class 4 is the same size range hot-dip galvanized rather than pre-galvanized. Weights are nominal, at 7.85 g/cm³.
Trade gauges 23 G – 16 G
| Round in | Square / Rectangular / Profile | Gauge — Weight per 20 ft / 6 m length (kg) | ||||||
|---|---|---|---|---|---|---|---|---|
| 23 G 0.6 mm | 22 G 0.7 mm | 21 G 0.8 mm | 20 G 0.9 mm | 19 G 1.0 mm | 18 G 1.2 mm | 16 G 1.6 mm | ||
| 1/2 | 3/8 × 3/8 | 1.00–1.10 | 1.20–1.30 | 1.35–1.45 | 1.55–1.65 | 1.70–1.80 | 2.00–2.10 | 2.60–2.70 |
| 5/8 | 1/2 × 1/2 | 1.30–1.40 | 1.50–1.60 | 1.70–1.80 | 1.90–2.00 | 2.10–2.20 | 2.50–2.60 | 3.30–3.40 |
| 3/4 | 5/8 × 5/8 · 3/4 × 3/8 | 1.50–1.60 | 1.80–1.90 | 2.00–2.10 | 2.35–2.45 | 2.55–2.65 | 3.00–3.10 | 4.00–4.10 |
| 1 | 3/4 × 3/4 · 1 × 1/2 | 2.05–2.20 | 2.50–2.65 | 2.75–2.90 | 3.00–3.15 | 3.50–3.65 | 4.20–4.35 | 5.50–5.65 |
| 1-1/4 | 1 × 1 · 1/2 × 1-1/2 · 19 × 42 mm elliptical | 2.70–2.90 | 3.05–3.25 | 3.50–3.70 | 4.00–4.20 | 4.50–4.70 | 5.30–5.50 | 7.00–7.20 |
| 1-1/2 | 1-1/4 × 1-1/4 · 3/4 × 1-1/2 | 3.10–3.30 | 3.80–4.00 | 4.30–4.50 | 4.80–5.00 | 5.40–5.60 | 6.45–6.65 | 8.60–8.80 |
| 1-5/8 | 1 × 1-1/2 · L (Small) 1/2 × 2 | 3.40–3.60 | 4.00–4.20 | 4.65–4.85 | 5.30–5.50 | 5.80–6.00 | 7.00–7.20 | 9.35–9.55 |
| 1-7/8 | 1-1/2 × 1-1/2 · 1 × 2 · 1-1/4 × 1-3/4 · D Sada · L-T-Z | 4.00–4.25 | 4.80–5.05 | 5.40–5.65 | 6.10–6.35 | 6.80–7.05 | 8.10–8.35 | 10.75–11.00 |
| 2-1/4 | 2 × 2 · 2 × 1-1/2 · 1-1/4 × 2-1/2 · 1 × 3 · T (Big) · D-M | 4.75–5.00 | 5.50–5.75 | 6.50–6.75 | 7.40–7.65 | 8.25–8.50 | 9.80–10.05 | 13.00–13.25 |
| 2-7/8 | 1-1/2 × 3 · D-Jumbo | 6.20–6.50 | 7.20–7.50 | 8.20–8.50 | 9.40–9.70 | 10.50–10.80 | 12.60–12.90 | 16.75–17.05 |
Weight band in kilograms for one 20 ft (6 m) length. The square, rectangular and profile sizes on each line are rolled from the same strip as the round conduit and fall in the same band. Sizes are in inches except 19 × 42, which is the elliptical section in millimetres. Profile market names are shown in red.
Gallery
More from the range
Schedule 10, 20, 40 and 80 to ASTM A53, Grade A and Grade B
Electric resistance welded mild steel pipe from 1/2" to 16" diameter in wall thicknesses to 12 mm, hydro-tested and supplied against ASTM A53 and ASME B36.10M in Grade A and Grade B.
Specifications
Square and rectangular ERW pipe in 0.6 mm to 4.0 mm wall
Electric resistance welded square and rectangular mild steel pipe from 10 × 10 mm to 100 × 100 mm and 10 × 20 mm to 60 × 120 mm, in wall thicknesses from 0.6 mm to 4.0 mm with guaranteed square geometry.
Specifications
L, T, Z and D sections for doors, windows, gates and railings
Architectural roll-formed steel profiles — L, T, Z and D sections from 0.70 mm to 1.20 mm — developed for door, window, gate and railing fabrication in residential and commercial construction.
SpecificationsSend us your sizes, grades and quantities and we will come back with a price and a lead time.
Tell us what you need and it opens in WhatsApp, already addressed. Pick a subject: