Pipe Specs

Black Pipes

Applications

BS 1387 tubes are widely used for cold water services. low pressure steam and feed, compressed air pipe works, gas and petroleum services.

Light Pipes Dimensions

(BS 1387 - 1985, ISO - 65)

Nominal Size (DN)
Designation of Thread
Outside Diameter
(mm)
Thickness
(mm)
Mass of Black Tube
(Kg/m)
Min
Max
Plain End
Screwed & Socketed
15
½"
21.0
21.4
2.0
0.947
0.956
20
¾"
26.4
26.9
2.3
1.38
1.39
25
1"
33.2
33.8
2.6
1.98
2.00
32
1¼"
41.9
42.5
2.6
2.54
2.57
40
1½"
47.8
48.4
2.9
3.23
3.27
50
2"
59.6
60.2
2.9
4.08
4.11
65
2½"
75.2
76.0
3.2
5.71
5.83
80
3"
87.9
88.7
3.2
6.72
6.89
100
4"
113.0
113.9
3.6
9.75
10.0

top

Medium Pipes Dimensions

(BS 1387 - 1985, ISO - 65)

Nominal Size (DN)
Designation of Thread
Outside Diameter
(mm)
Thickness
(mm)
Mass of Black Tube
(Kg/m)
Min
Max
Plain End
Screwed & Socketed
15
½"
21.1
21.7
2.6
1.21
1.22
20
¾"
26.6
27.2
2.6
1.56
1.57
25
1"
33.4
34.2
3.2
2.41
2.43
32
1¼"
42.1
42.9
3.2
3.10
3.15
40
1½"
48.0
48.8
3.2
3.57
3.61
50
2"
59.8
60.8
3.6
5.03
5.10
65
2½"
75.4
76.6
3.6
6.43
6.55
80
3"
88.1
89.5
4.0
8.37
8.54
100
4"
113.3
114.9
4.5
12.2
12.5
125
5"
138.7
140.6
5.0
16.6
17.1
150
6"
164.1
166.1
5.0
19.7
20.3

top

Heavy Pipe Dimensions

(BS 1387 - 1985, ISO - 65)

Nominal Size (DN)
Designation of Thread
Outside Diameter
(mm)
Thickness
(mm)
Mass of Black Tube
(Kg/m)
Min
Max
Plain End
Screwed & Socketed
15
½"
21.1
21.7
3.2
1.44
1.45
20
¾"
26.6
27.2
3.2
1.87
1.88
25
1"
33.4
34.2
4.0
2.94
2.96
32
1¼"
42.1
42.9
4.0
3.80
3.83
40
1½"
48.0
48.8
4.0
4.38
4.42
50
2"
59.8
60.8
4.5
6.19
6.26
65
2½"
75.4
76.6
4.5
7.93
8.05
80
3"
88.1
89.5
5.0
10.3
10.5
100
4"
113.3
114.9
5.4
14.5
14.8
125
5"
138.7
140.6
5.4
17.9
18.4
150
6"
164.1
166.1
5.4
21.3
21.9
top

 

Chemical Analysis & Mechanical Properties

(BS 1387 - 1985)
Chemical Composition
Mechanical Properties
C
Max
Mn
Max
Si
Max
P
Max
S
Max
Tensile Strength BM
Yield Strength RE (Min)
Elongation on Gauge Length
L0=5.65 sqrt(S0) A(Min)
%
0.20
%
1.20
%
0.10
%
0.045
%
0.045
2
N/mm
320 to 460
2
N/mm
195
%
20
top

 

Standards

Other standards used for E.I.W pipes are: ASTM A120, ISO 65, JIS G3442, DIN 2440 & DIN 2441
Ispection, packing, quality certificate and delivery according to DIN 500 49/3.1, BS 1387 - 1985

top

API 5L Pipes

Dimensions

Nominal Size
(inch)
Wall
Weight
(Lb/Ft)
Out Dia.
(mm)
In Dia.
(mm)
Wall Thickness
(mm)
Plain End Weight
(Kg/m)
Test Pressure (min)
API 5L Grade (STD)
A25
A
B
¾
STD
1.13
26.7

20.9

2.9
1.70
48
48
48
1
STD
1.68
33.4
26.6
3.4
2.52
48
48
48
1¼
STD
2.27
42.2
3.5
3.6
3.43
69
83
90
1½
STD
2.27
48.3
40.9
3.7
4.07
69
83
90
2
STD
2.03
60.3
56.1
2.1
3.01
41
87
101
2
STD
2.64
60.3
54.6
2.8
3.97
55
-
-
2
STD
3.00
60.3
53.9
3.2
4.51
69
-
-
2
STD
3.36
60.3
53.1
3.6
5.03
69
-
-
2
STD
3.65
60.3
52.5
3.9
5.42
69
161
172
2½
STD
2.47
73.0
68.8
2.1
3.67
41
71
83
2½
STD
3.22
73.0
67.4
2.8
4.85
55
-
-
2½
STD
3.67
73.0
66.6
3.2
5.51
69
-
-
2½
STD
4.12
73.0
65.8
3.6
6.16
69
-
-
2½
STD
4.53
73.0
65
4.0
6.81
69
136
158
2½
STD
4.97
73.0
64.2
4.4
7.44
69
150
172
2½
STD
5.40
73.0
63.4
4.8
8.07
69
163
172
2½
STD
5.79
73.0
62.6
5.2
8.69
69
172
172
3
STD
3.03
88.9
84.7
2.1
4.50
41
59
68
3
STD
3.95
88.9
83.3
2.8
5.95
55
-
-
3
STD
4.51
88.9
82.5
3.2
6.76
69
89
104
3
STD
5.06
88.9
81.7
3.6
7.57
69
-
-
3
STD
5.57
88.9
80.9
4.0
8.37
69
112
130
3
STD
6.11
88.9
80.1
4.4
9.17
69
123
143
3
STD
6.65
88.9
79.3
4.8
9.95
69
134
156
3
STD
7.58
88.9
77.9
5.5
11.31
69
154
172
3½
STD
3.47
101.6
97.4
2.1
5.15
-
51
60
3½
STD
4.53
101.6
96.0
2.8
6.82
41
68
80
3½
STD
5.17
101.6
95.2
3.2
7.76
-
78
91
3½
STD
5.81
101.6
94.4
3.6
8.70
55
88
102
3½
STD
6.40
101.6
93.6
4.0
9.63
-
98
114
3½
STD
7.03
101.6
92.8
4.4
10.55
69
108
125
3½
STD
7.65
101.6
92.0
4.8
11.46
83
117
137
3½
STD
9.11
90.2
90.2
5.7
13.48
83
139
162
4
STD
3.92
114.3
110.1
2.1
5.81
-
46
53
4
STD
5.84
114.3
107.9
3.2
8.77
55
70
81
4
STD
6.56
114.3
107.1
3.6
9.83
-
78
91
4
STD
7.24
114.3
106.3
4.0
10.88
69
87
101
4
STD
7.95
114.3
105.5
4.4
11.92
-
96
111
4
STD
8.66
114.3
104.7
4.8
12.96
83
104
121
4
STD
9.32
114.3
103.9
5.2
13.99
-
113
132
4
STD
10.01
114.3
103.1
5.6
15.01
81
122
142
4
STD
10.79
114.3
102.3
6.0
16.02
-
139
162

top

Chemical Analysis

Type of pipe
(Seam Welded Pipe)
Grade
%C
%Mn
%P
%S
Max
Min
Max
Min
Max
Max
Non expanded or cold expanded
A25CII
0.21
0.30
0.60
-
0.030
0.030
Non expanded or cold expanded
A25CIII
0.21
0.30
0.50
0.045
0.080
0.030
Non expanded or cold expanded
A
0.21
-
0.90
-
0.030
0.030
Non expanded or cold expanded
B
0.26
-
1.15
-
0.030
0.030
top

Mechanical Properties

Grade
Yield Strngth (min)
Ultimate Tensile Strength
PSI
Mpa (N/mm²)
PSI
Mpa (N/mm²)
A25
25,000
172
45,000
310
A
30,000
207
48,000
331
B
35,000
241
60,000
413
top

Standards

Gas pipes are prodused according to API 5L Grade A, B, A25 and also can be manufacturd according to other standards such as DIN 1626, ASTM A53 and A120.

top

Rectangular Profiles

Pipe Size
Rectangular Sections (mm)
¾"
22x22 , 30x15
1"
25x25 , 30x20 , 35x15
1¼"
32.5x32.5 , 40x25 , 45x20
1½"
38x36 , 50x25
2"
48x48 , 55x40
2½"
60x60 , 80x40
3"
70x70 , 90x50
3½"
80x80 , 100x60
4"
90x90 , 120x60
top

 

Galvanized Pipes

These pipes are being made under hot dip galvanizing method with 60 microns zinc thickness, according to BS 729 or other standards such as DIN 2444, JIS G3442, ASTM A120 and ISO 1459.

top