Dimension Tolerance
  Thickness Light : -8%, +Not Limit
  Medium & Heavy : -10%, +Not Limit
  Weight : ± 4% Per Bundle (Over 500ft),
    : +10% , -8% Per Piece
  Length : + 50 % mm.,-0 mm.
 
     
 

Standard BS 1387: 1985 Class Light Black & Galvanized Steel Pipe

Normal Size DN

Designtion of Thread

Outside Diameter
Wall Thickness mm.
Calculated Weight
Threads Per mm.
Number of piece per Bundle
MIN mm. MAX mm.
Plain Ends kg/m
Threads & Coupling kg/m
15
1/2"
21.4
21.0
2.0
0.947
0.956
14
169
20
3/4"
26.9
26.4
2.3
1.38
1.39
14
127
25
1"
33.8
33.2
2.6
1.98
2.00
11
91
32
1 1/4"
42.5
41.9
2.6
2.54
2.57
11
61
40
1 1/2"
48.4
47.8
2.9
3.23
3.27
11
44
50
2"
60.2
59.6
2.9
4.08
4.15
11
37
65
2 1/2"
76.0
75.2
3.2
5.71
5.83
11
24
80
3 "
88.7
87.9
3.2
6.72
6.89
11
19
100
4"
113.9
113.0
3.6
9.75
10.00
11
14


Standard BS 1387: 1985 Class Medium Black & Galvanized Steel Pipe

Normal Size DN

Designtion of Thread

Outside Diameter
Wall Thickness mm.
Calculated Weight
Threads Per mm.
Number of piece per Bundle
MIN mm. MAX mm.
Plain Ends kg/m
Threads & Coupling kg/m
15
1/2"
21.7
21.1
2.6
1.21
14
169
20
3/4"
27.2
26.6
2.6
1.56
14
127
25
1"
34.2
33.4
3.2
2.41
11
91
32
1 1/4"
42.9
42.1
3.2
3.10
11
61
40
1 1/2"
48.8
48.0
3.2
3.57
11
44
50
2"
60.8
59.8
3.6
5.03
11
37
65
2 1/2"
76.6
75.4
3.6
6.43
11
24
80
3 "
89.5
88.1
4.0
8.37
11
19
100
4"
114.9
113.3
4.5
12.20
11
14
125
5"
140.6
138.7
5.0
16.60
11
7
150
6"
166.1
164.1
5.0
19.70
11
7


Standard BS 1387: 1985 Class Heavy Black & Galvanized Steel Pipe

Normal Size DN

Designtion of Thread

Outside Diameter
Wall Thickness mm.
Calculated Weight
Threads Per mm.
Number of piece per Bundle
MIN mm. MAX mm.
Plain Ends kg/m
Threads & Coupling kg/m
15
1/2"
21.7
21.1
3.2
1.44
1.45
14
169
20
3/4"
27.2
26.6
3.2
1.87
1.88
14
127
25
1"
34.2
33.4
4.0
2.94
2.96
11
91
32
1 1/4"
42.9
42.1
4.0
3.80
3.83
11
61
40
1 1/2"
48.8
48.0
4.0
4.38
4.42
11
44
50
2"
60.8
59.8
4.5
6.19
6.26
11
37
65
2 1/2"
76.6
75.4
4.5
7.93
8.05
11
24
80
3 "
89.5
88.1
5.0
10.30
10.50
11
19
100
4"
114.9
113.3
5.4
14.50
14.80
11
14
125
5"
140.6
138.7
5.4
17.90
18.40
11
7
150
6"
166.1
164.1
5.4
21.30
21.90
11
7
 
 
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