world of steel A Division of Ellias International




      HDG Welded Steel Pipe

Grade BS 1387-1985, British Standard for Welded Steel Pipe or BS 21 for threaded pipe

 

mm Inch A B C A B C A B C A B C Thread number
per inch
Length of pipe(mm)
15 1/2 2.0 2.6 3.2 21.4 21.7 21.7 21.0 21.1 21.1 0.947 1.21 1.44 14 13.2
20 3/4 2.3 2.6 3.2 26.9 27.2 27.2 26.4 26.6 26.6 1.38 1.56 1.87 14 14.5
25 1 2.6 3.2 4.0 33.8 34.2 34.2 33.2 33.4 33.4 1.98 2.41 2.94 11 16.8
32 1-1/4 2.6 3.2 4.0 42.5 42.9 42.9 41.9 42.1 42.1 2.54 3.10 3.80 11 19.1
40 1-1/2 2.9 3.2 4.0 48.4 48.8 48.8 47.8 48.0 48.0 3.23 3.57 4.38 11 19.1
50 2 2.9 3.6 4.5 60.2 60.8 60.8 59.6 59.8 59.8 4.08 5.03 6.19 11 23.4
65 2-1/2 3.2 3.6 4.5 76.0 76.6 76.6 75.2 75.4 75.4 5.71 6.43 7.93 11 26.7
80 3 3.2 4.0 5.0 88.7 89.5 89.5 87.9 88.1 88.1 6.72 8.37 10.3 11 29.8
100 4 3.6 4.5 5.4 113.9 114.9 114.9 113.0 113.3 113.3 9.75 12.1 14.5 11 35.8
125 5 - 5.0 5.4 - 140.6 140.6 - 138.7 138.7 - 16.6 17.9 - -
150 6 - 5.0 5.4 - 166.1 166.1 - 164.1 164.1 - 19.7 21.3 - -

 

Wall thickness tolerance of class A PIpes - 8%
Wall thickness tolerance of Class B & C pipes: 10%

A - Light gauge (Brown)
B - Medium gauge (Blue)
C - Heavy gauge (Red)

Length tolerance of pipes: +20mm/0 or according to the customers requirement +6mm/o

GB/T 7735 - 1995

The online eddy  current testing for all kinds of steel pipes is in accordance with Class A or GB/T 7735-1995. The method of eddy current test for steel pipes.

 

Click here to send your inquiry