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Specifications

We can produce and supply to you various steel pipes according to international standard. Hot dip galvanized steel pipes are used in the following fields, steel structure, build structure, transportation of low pressure liquid and gas etc. our products are exported to about 50 countries in the world, we get a lot of recognition from many customers since our good quality and service.
Pipes Production standard: ASTM, JIS, BS, DIN, EN, API, GB.
Pipes section type: round, square, rectangular, oval and other special section type.
Size of pipes:
ASTM A-53
NPS
DESIG-
NATOR
OUTSIDE
DIAMETER
WALL
THICKNESS
WEIGHT
SCHE-
DULE
NO.
TEST PRESSUTES
NO.OF
THREADS
PER INCH
PLAIN ENDS
Kg/m
Kg/ft
Grade A
Grade B
in
in
mm
in
mm
blk
gal
blk
gal
 
psi
Kg/cm2
psi
Kg/cm2
1/2
0.840
21.3
0.109
2.77
1.27
1.35
0.39
0.41
40
700
50
700
50
14
3/4
1.050
26.7
0.113
2.87
1.69
1.79
0.52
0.55
40
700
50
700
50
14
1
1.315
33.4
0.133
3.38
2.50
2.65
0.76
0.81
40
700
50
700
50
11-1/2
1-1/4
1.660
42.2
0.140
3.56
3.39
3.59
1.03
1.10
40
1200
84
1300
91
11-1/2
1-1/2
1.900
48.3
0.145
3.68
4.05
4.29
1.23
1.31
40
1200
84
1300
91
11-1/2
2
2.375
60.3
0.154
3.91
5.44
5.77
1.66
1.76
40
2300
162
2500
176
11-1/2
2-1/2
2.875
73.0
0.203
5.16
8.63
9.15
2.63
2.79
40
2500
176
2500
176
8
3
3.500
88.9
0.216
5.49
11.29
11.97
3.44
3.65
40
2220
156
2500
176
8
3-1/2
4.000
101.6
0.226
5.74
13.57
14.38
4.14
4.38
40
2030
143
2370
167
8
4
4.500
114.3
0.237
6.02
16.07
17.03
4.90
5.19
40
1900
134
2210
155
8
5
5.563
141.3
0.258
6.55
21.77
23.08
6.64
7.03
40
1670
117
1950
137
8
6
6.625
168.3
0.280
7.11
28.26
29.96
8.61
9.13
40
1520
107
1780
125
8
8
8.625
219.1
0.322
8.18
42.55
45.10
12.97
13.75
40
1340
94
1570
110
8
British Standard (BS1387-85) Thin thickness pipe specification
 
Outside Diameter （mm）
 
Weight of Black Pipe （kg/m）
Nominal Size
（ DN）
Screw Identifiers
Maximum
Minimum
Thickness
Plain end pipe
Threaded and With Coupler
15
1/2
21.4
21.0
2.0
0.947
0.956
20
3/4
26.9
26.4
2.3
1.38
1.39
25
1
33.8
33.2
2.6
1.98
2.00
32
11/4
42.5
41.9
2.6
2.54
2.57
40
11/2
48.4
47.8
2.9
3.23
3.27
50
2
60.2
59.6
2.9
4.08
4.15
65
21/2
76.0
75.2
3.2
5.71
5.83
80
3
88.7
87.9
3.2
6.72
6.89
100
4
113.9
113.0
3.6
9.75
10.0
Note： Size and weight are as same as ISO 65 (Thin thickness 2).
 
Outside Diameter （mm）
 
Weight of Black Pipe （kg/m）
Nominal Size
（ DN）
Screw Identifiers
Maximum
Minimum
Thickness
Plain end pipe
Threaded and With Coupler
15
1/2
21.7
21.1
2.6
1.21
1.22
20
3/4
27.2
26.6
2.6
1.56
1.57
25
1
34.2
33.4
3.2
2.41
2.43
32
11/4
42.9
42.1
3.2
3.10
3.13
40
11/2
48.8
48.0
3.2
3.57
3.61
50
2
60.8
59.8
3.6
5.03
5.10
65
21/2
76.6
75.4
3.6
6.43
6.55
80
3
89.5
88.1
4.0
8.37
8.54
100
4
114.9
113.3
4.5
12.2
12.5
125
5
140.6
138.7
5.0
16.6
17.1
150
6
166.1
164.1
5.0
19.7
20.3
Deutsche Industrie Normen (DIN2444) Hot Dipped Galvanized Pipe and Welded Black Pipe
Nominal Inside Diameter
Outside Diameter (mm)
Wall Thickness
Weight（kg/m）
DN
inch
Maximum
Minimum
（ mm）
Plain End Pipe
Pipe With Coupler
15
1/2
21.7
21.1
2.65
1.22
1.23
20
3/4
27.2
26.6
2.65
1.58
1.59
25
1
34.2
33.4
3.25
2.44
2.46
32
1-1/4
42.9
42.1
3.25
3.14
3.17
40
1-1/2
48.8
48.0
3.25
3.61
3.65
50
2
60.7
59.9
3.65
5.10
5.17
65
2-1/2
76.4
75.6
3.65
6.51
6.63
80
3
89.3
88.3
4.05
8.47
8.64
100
4
114.6
113.6
4.50
12.10
12.40
125
5
140.3
139.1
4.85
16.20
16.70
150
6
165.7
164.5
4.85
19.20
19.80