SPECIFICATION FOR STEEL TUBES & TUBULARS CONFORMING TO IS 1239:2004

NOMINAL BORE OUTSIDE DIAMETER DIN 2440 DIN 2441
Min Max Wall Thickness Mass Of Plain End Tubes Wall Thickness Mass Of Plain End Tubes
mm mm mm mm mm Kg/m m/tones
15 21.0 21.8 2.65 1.22 3.25 1.45
20 26.5 27.3 2.65 1.58 3.25 1.90
25 33.3 34.2 3.25 2.44 4.05 2.97
32 42.0 42.9 3.25 3.14 4.05 3.84
40 47.9 48.8 3.25 3.61 4.05 4.43
50 59.7 60.8 3.65 5.10 4.50 6.17
65 75.3 76.6 3.65 6.51 4.50 7.90
80 88.0 89.5 4.05 8.47 4.85 10.10
100 113.1 115.0 4.50 12.1 5.40 14.40
125 138.5 140.8 4.85 16.2 5.40 17.80
150 163.9 166.5 4.85 19.2 5.40 21.20
TOLERANCES
A) WALL THICKNESS B) WEIGHT C) LEAK TIGHTNESS TEST
1.Minus 12.5% 1.Single Tube = plus/minus 10%
2.For lot of tons = plus/minus 7.5%		 100% Hydrostatic testing as 50 bar
D) FLATTENING TEST E) GALVANIZING F) BEND TEST
1.For tubes NB 65mm
2. Flatten up to 2/3 of tube dia without crack
3.Well position-12 O'Clock & 3 O'Clock		 1. Zinc Coating = 400 g/sq m (minimum)
2. Zinc Layer thickness = 56 microns		 1. For tubes upto & including NB 25mm
2. For tubes above NB 25 & up to NB 50mm
* Bending Angle = 90' Bending Radius =
3. times to the OD of tube
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