IS 1239 Part 1 Medium Gauge / Grade Mild Steel Pipes

IS 1239 Part 1 covers medium gauge mild steel pipe dimensions and other requirements for intermediate pressure piping. Ferrobend is a Mumbai based stockist and supplier of IS 1239 part 1 medium gauge / grade mild steel pipes in Jindal / MSL / Tata / SAIL / ISMT and Swastik brand. IS 1239 Part 1 Pipes must be manufactured by one of the following process.

  • Hot Finished Seamless (HFS)
  • Cold Finished Seamless (CFS)
  • Hot Finished Welded (HFW)
  • Electric resistance welded or high frequency induction welded (ERW or HFIW)
Note: Tubes made by manual welding are not covered by this specification.

Dimensions and Weight Chart of Medium Grade Pipes

Nominal Bore
mm 		Outside Diameter Thickness
mm 		Mass of Tube
Maximum
mm 		Minimum
mm 		Plain End
kg/m 		Screw & Socketed
kg/m
6 10.6 9.8 2.0 0.404 0.407
8 14.0 13.2 2.3 0.641 0.645
10 17.5 16.7 2.3 0.839 0.845
15 21.8 21.0 2.6 1.21 1.22
20 27.3 26.5 2.6 1.56 1.57
25 34.2 33.3 3.2 2.41 2.43
32 42.9 42.0 3.2 3.10 3.13
40 48.8 47.9 3.2 3.56 3.60
50 60.8 59.7 3.6 5.03 5.10
65 76.6 75.3 3.6 6.42 6.54
80 89.5 88.0 4.0 8.36 8.53
100 115.0 113.1 4.5 12.2 12.5
125 140.8 138.5 4.8 15.9 16.4
150 166.5 163.9 4.8 18.9 19.5

Chemical Composition (Laddle Analysis)

Elements Laddle Analysis (%), Max Variation Over (%), Max
Carbon 0.20 0.02
Manganese 1.30 0.04
Sulphur 0.04 0.005
Phosphorus 0.04 0.005

Other Dimension Class