GI Round Pipe Specification Chart

GI Round Pipe Specification Chart !

Galvanized steel pipe divided into two types .  Hot galvanizing and electric galvanizing. Hot galvanizing galvanized thick layer, with uniform coating, strong adhesion, long service life and other advantages.

The life of hot galvanizing is very long. It can reach 50 years in the wild depending on the environment.

The table below gives the corresponding types in BS 1387 and EN 10255.

EN 10255 L
EN 10255 L1
EN 10255 L2 BS 1387 Light
EN 10255 Medium BS 1387 Medium
EN 10255 Heavy BS 1387 Heavy

Dimensions and Weight of steel tubes according the British Standard – BS 1387:1985 “Specification for screwed and socketed steel tubes and tubulars and for Plain end steel tubes suitable for Welding or for screwing to BS 21 pipe threads” can be found in the table below:

Nominal bore Outside diameter Thickness Mass
Light Medium/
Heavy
Light Medium Heavy Light Medium Heavy
in mm mm
mm
mm
mm
mm
kg/m
kg/m
kg/m
1/4 8 13.6 13.9 1.80 2.3 2.9 0.515 0.641 0.765
3/8 10 17.1 17.4 1.80 2.3 2.9 0.670 0.839 1.020
1/2 15 21.4 21.7 2.00 2.6 3.2 0.947 1.210 1.440
3/4 20 26.9 27.2 2.30 2.6 3.2 1.380 1.560 1.870
1 25 33.8 34.2 2.60 3.2 4.0 1.980 2.410 2.940
1 1/4 32 42.5 42.9 2.60 3.2 4.0 2.540 3.100 3.800
1 1/2 40 48.4 48.8 2.90 3.2 4.0 3.230 3.570 4.380
2 50 60.2 60.8 2.90 3.6 4.5 4.080 5.030 6.190
2 1/2 65 76.0 76.6 3.20 3.6 4.5 5.710 6.430 7.930
3 80 88.7 89.5 3.20 4.0 5.0 6.720 8.370 10.300
4 100 113.9 114.9 3.60 4.5 5.4 9.750 12.200 14.500
5 125 140.6 5.0 5.4 16.600 17.900
6 150 165.1 5.0 5.4 19.700 21.300

The standard is applicable to tubes of nominal size DN8 to DN150 in light, medium and heavy thickness.

  • The BS 1387:1985 specification for screwed and socket steel tubes and for plain end steel tubes suitable for welding or for screwing to BS 21 pipe threads.

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