MS ERW Black Pipes

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MS ERW Black Pipes

Electric Resistance Welded (ERW) pipes are extensively used in agriculture, industry and construction activities like scaffolding and casing in bore wells, These are used for conveying water, gas crude oil and chemicals at various pressures and densities over long distances. Considering the challenging and varied applications, the pipes are produced to meet very high standards of both national and international specifications.

Quality assurance begins at the raw material stage and continues right through all the manufacturing operations, till the Pipes are packed for dispatch. The quality assurance department is fully backed by a modern laboratory for various metallurgical and chemical tests, and a test house for testing physical properties. has been awarded the prestigious ISO 9001:2015 certificate for their quality systems.

Structural Industry

Structural pipes are present in wide range of grades and sizes so as to be utilized for a number of structural tasks and applications. Some of the common applications of the structural pipe include being used for sign poles, bollards, piling, columns and structural supports. At you can choose from a variety of pipe size and wall thickness of structural pipes. You can easily cut and splice the length or can order as per the desired length as per our minimum order quantity. This ensures easy application and also helps in reducing waste.

ERW Steel Pipes: This type of structural pipe is normally known as high quality line pipe in the construction industry and it is used by the oil and utility industries. It can be used for dock, column, sign pole and tunnel construction.

Usually, structural pipes are such steel construction pipes that fulfill certain specified standards of mechanical properties and chemical composition.


N.B. and Series Outside Diameter Thick-ness Nominal Weight Black Tubes Plan End Calculated Nominal Weight Galvanized Tubes Plan End
  mm mm kg/m m/tonne kg/m m/tonne
15 L
M
H		 21.3 2.0
2.6
3.2		 0.947
1.21
1.44		 1058
826
694		 1.00
1.26
1.49		 1000
794
671
20 L
M
H		 26.9 2.3
2.6
3.2		 1.38
1.56
1.87		 725
641
535		 1.43
1.61
1.92		 699
621
521
25 L
M
H		 33.7 2.6
3.2
4.0		 1.98
2.41
2.93		 505
415
341		 2.03
2.46
2.98		 493
407
336
32 L
M
H		 42.4 2.6
3.2
4.0		 2.54
3.10
3.79		 394
323
264		 2.62
3.18
3.87		 382
314
258
40 L
M
H		 48.3 2.9
3.2
4.0		 3.23
3.56
4.37		 310
281
229		 3.34
3.67
4.48		 299
272
223
50 L
M
H		 60.3 2.9
3.6
4.5		 4.08
5.03
6.19		 245
199
162		 4.20
5.15
6.31		 238
194
158
65 L
M
H		 76.1 3.2
3.6
4.5		 5.17
6.42
7.93		 175
156
126		 5.86
6.57
8.10		 171
152
123
80 L
M
H		 88.9 3.2
4.0
4.8		 6.72
8.36
9.90		 149
120
101		 6.90
8.54
10.08		 145
117
99
90 L
M
H		 101.6 3.6
4.0
4.8		 8.70
9.63
11.5		 115
144
87		 8.97
7.20
11.77		 111
139
85
100 L
M
H		 114.3 3.6
4.5
5.4		 9.75
12.2
14.5		 103
82
69		 9.97
12.42
14.72		 100
81
68
110 L
M
H		 127.0 4.5
4.8
5.4		 13.6
14.5
16.2		 74
69
62		 13.90
14.80
14.80		 72
68
61
125 L
M
H		 139.7 4.5
4.8
5.4		 15.0
15.9
17.9		 67
63
56		 15.25
16.15
18.15		 66
62
55
135 L
M
H		 152.4 4.5
4.8
5.4		 16.4
17.5
19.6		 61
57
51		 16.78
17.88
19.98		 60
56
55
150 L
M
H		 165.1 4.5
4.8
5.4
 17.8
18.9
21.3		 56
52
47
 18.20
19.80
21.70
 55
51
46

150 L
M
H
IH2

 168.3

4.5
4.8
5.4
6.3

18.2
19.4
21.7
25.2

55
52
46
40

18.66
19.88
22.24
41.00

54
50
45
24

175 L
M
H

 193.7

4.8
5.4
5.9

22.4
25.1
27.3

45
40
37

22.94
25.64
27.84

44
39
36
200 L
M
H		 219.1 4.8
5.6
5.9		 25.4
29.5
31.0		 39
34
32		 25.95
30.05
31.55		 39
33
32
225 H 244.5 5.9 34.7 29 35.36 28
250 H 273.0 5.9 38.9 26 39.68 25
300 H 323.9 6.3 49.3 20 50.28 20
350 H 355.6 8.0 68.6 15 69.58 14

A. TENSILE PROPERTIES

Grade

 Y.S.(Min)
Mpa
(kg/mm2)		 T.S(Min)
Mpa
(kg/mm2)

% age
Elongation
YST-210 210(21.42) 330 (33.66) 20
YST-240 240 (24.48) 410 (41.82) 17
YST-310 300 450 15

Note: For Tube size upto and including 25mm NB, elongation of 12% shall be permissible.

B. TOLERANCE

Outside diameter upto & including

48.3 mm + 0.4 mm - 0.8 mm
Over 48.3 mm +/-1%

C. THICKNESS

For all sizes

Welded Tubes + Not limited
-10%

D. WEIGHT

Single Tube (Light Class) -8%
+10%
For Medium & Heavy Class +/-10%

For quantities per load of

Minimum 10 tonnes +/-5%
Medium & Heavy +/-7.5%

Manufacturing Process

ERW pipes are made from HR Coils manufactured & supplied by reputed major steel producers. After being longitudinally slitted & edge preparation, the strip is progressively formed into a circular shape by passing it through a series of forming rolls.

Continuous welding is carried out by a high frequency function welding machine, and the seam is formed by fusing the edges without any filler metal. The weld bead reinforcement (inside), is removed, if needed. The welded pipe, after cooling is cut in appropriate length after attaining its roundness and specified outside diameter.

The pipes are conveyed to the finishing bay for finshing, testing and inspection. Hydro testing of pipes is undertaken to detect leaks and fissures prior to galvanizing and threading. The pipes are subsequently galvanized/black varnished/threaded as per specification/client requirement.

EQUIPMENT DETAILS:
  • Slitting lines
  • ERW pipe mills with latest technology
  • Galvanizing machines
  • Threading machines
  • Marking machines
  • Hydro testing machines
  • Automatic ultrasonic testing machine/Eddy current M/C [NDT]
  • Fully computerized Japanese spectometer for carrying out chemical analysis
  • In house fully equiped laboratory for chemical and mechanical testing
  • D.G. set
  • 33 KV power substation for round-the-clock production

Applications


  • Ballards
  • Caissons
  • Columns
  • Dock Pipes
  • Dredge Pipe
  • Pilings
  • Roadway Billboard Signs
  • Road Bore Casing
  • Sign Poles
  • Slurry Lines
  • Structural Supports
  • Tower Construction

The unfaltering expansion of the Indian real estate market has brought many opportunities for considerable developers to advance big format office volumes and linked structures like resorts, malls, advanced hospitals, etc. This advancement has compelled in understanding the significance of the fire fighting applications and HVAC in both commercial and residential structures as an important part for health and safety.

A fire fighting system is the most essential part of the building services, with an aim to protect life and property. Fire fighting system consist of three basic part

  • A large water storage tank
  • Specialized pumping system
  • Network of piping in either hydrant or sprinklers

HVAC (Heating, Ventilation, and Air-Conditioning) can be classified as below with pipes usage in general

  • Commercial Cooling - large spaces of hotels, IT parks, malls, airports etc.
  • Process Cooling - for sterilized rooms of pharmaceutical and manufacturing industries.
  • Pipes used in Fan Coil Unit-25 NB to 32 NB
  • Pipes used from chiller header to AHU (Air Handling Unit)-50 NB to 150 NB
  • Pipes used in chiller branch lines -150 NB to 250 NB
  • Pipes used in chiller main lines-300 NB to 500 NB

The main application of HVAC is to stabilize airflow, room temperature and humidity, which ensures that all such elements stay within the acceptable limits. Operative control of all these factors minimizes the risks related to health.

N.B and Series Outside
Diameter		 Wall
Thickness		 Nominal Weight
Black Tubes		 Nominal Weight
Galvanised Tubes		 Sockets
Plain End Screwed &
Socketed		 Plain End Screwed &
Socketed		 Minimum OD Minimum Length
mm Min mm Max mm mm SWG Kg/m m/tonne Kg/m m/tonne Kg/m m/tonne Kg/m m/tonne mm mm
15 L
M
H		 21.0
21.0
21.0		 21.4
21.8
21.8		 2.0
2.6
3.2		 14
12
10		 0.947
1.21
1.44		 1056
826
694		 0.956
1.22
1.45		 1046
819
689
 0.947
1.21
1.44		 1056
826
694		 0.956
1.22
1.45
1046
819
689
27 37
20 L
M
H		 26.4
26.5
26.5		 26.9
27.3
27.3
 2.3
2.6
3.2		 13
12
10		 1.38
1.56
1.87		 725
641
534		 1.39
1.57
1.88		 719
637
532		 1.38
1.56
1.87		 725
641
534		 1.39
1.57
1.88		 719
637
532		 32.5 39
25 L
M
H		 33.2
33.3 33.3		 33.8
34.2
34.2		 2.6
3.2
4.0		 12
10
8		 1.98
2.41
2.93		 505
415
341		 2.00
2.43
2.95
500
411
339		 1.98
2.41
2.93		 505
415
341		 2.00
2.43
2.95		 500
411
339		 39.5 46

51
32 L
M
H		 41.9
42.0
42.0		 42.5
42.9
42.9		 2.6
3.2
4.0		 12
10
8		 2.54
3.10
3.79		 394
322
264		 2.57
3.13
3.82
 389
319
261		 2.54
3.10
3.79		 394
322
264		 2.57
3.13
3.82		 389
319
261		 49

51
40 L
M
H
47.8
47.9
47.9		 48.4
48.8
48.8		 2.9
3.2
4.0		 11
10
8		 3.23
3.56
4.37		 309
281
229		 3.27
3.60
4.41		 306
278
227		 3.23
3.56
4.37		 309
281
229		 3.27
3.60
4.41		 306
278
227		 56

60
50 L
M
H		 59.6
59.7
59.7		 60.2
60.8
60.8		 2.9
3.6
4.5		 11
9
7		 4.08
5.03
6.19		 245
199
161		 4.15
5.10
6.26		 241
196
160		 4.08
5.03
6.19		 245
199
161		 4.15
5.10
6.26		 241
196
160		 68

69
65 L
M
H		 75.2
75.3
75.3		 76
76.6
76.6		 3.2
3.6
4.5		 10
9
7		 5.71
6.42
7.93		 175
155
126		 5.83
6.54
8.05		 171
153
124		 5.71
6.42
7.93		 175
155
126		 5.83
6.54
8.05		 171
153
124		 84  
80 L
M
H		 87.9
88.0
88.0		 88.7
89.5
89.5		 3.2
4.0
4.8		 10
8
6		 6.72
8.36
9.90		 149
119
101		 6.89
8.53
10.10		 145
117
99		 6.72
8.36
9.90		 149
119
101		 6.89
8.53
10.10		 145
117
99		 98 75
100 L
M
H		 113.0
113.1
113.1		 113.9
115
115		 3.6
4.5
5.4		 9
7
5		 9.75
12.2
14.5		 102
82
69		 10.00
12.50
14.80		 100
80
67		 9.75
12.2
14.5		 102
82
69		 10.00
12.50
14.80		 100
80
67		 124 87
125M
H
 138.5 138.5 140.8
140.8		 4.8
5.4
 6
5		 15.9
17.9		 63
56		 16.40
18.40		 61
54		 15.9
17.9		 63
56		 16.40
18.40		 61
54		 151 96
150M
H		 163.9 163.9 166.5
166.5		 4.8
5.4		 6
5		 18.9
21.3		 53
47		 19.50
21.90		 51
46		 18.9
21.3		 53
47		 19.50
21.90		 51
46
178
96

TOLERANCE

(a) Thickness

1. Light Tubes + Not Limited
-8%
2. Medium and
Heavy Tubes		 + Not Limited
-10%

(b) Weight

1. Single Tube
(Light series)		 +10%
-8%
2. Single Tube
(Medium &
Heavy series)		 +/-10%
3. For quantities per
load of 10 tonnes
minimum (Light series)		 +7.5%
-5%
4. For quantities per load
of 10 tonnes minimum
(Medium & Heavy series)
4 to 7 meters unless
otherwise specified
320 mpa (min)
20% (min)		 +/-7.5%
Outside Diameter Thick-ness Weight(Plan End)
mm mm kg/m m/tonne
168.3 2.6
3.2
4.0
4.5		 10.6
12.0
16.2
18.2		 94
83
62
55
219.1 2.6
3.6
4.5
6.3		 13.9
19.1
23.8
33.1		 72
52
42
30
273.0 3.6
4.0
5.0
6.3		 23.9
26.5
33.0
41.1		 42
38
30
24
323.9 4.0
4.5
5.6
7.1		 31.8
35.4
44.0
55.5		 31
28
23
18
355.6 4.0
5.0
5.6
8.0		 34.7
43.2
48.3
68.6		 29
23
21
15
406.4 4.0
5.0
6.3
8.8		 39.7
49.5
62.2
86.3		 25
20
16
12

TOLERANCE

1. Outsider Diameter 1%
2. Thickness
Welded tube Upto
and including 406.4 mm
+15%
-12.5%
3. Weight
Single Tube 		-8%
+10%
Outside
Diameter
mm		 Thickness
mm		 Mass
Kg/mtr.		 Mtr. /
tonne
63.5 3.65 5.39 186
  4.05 5.87 170
  4.50 6.55 153
  4.85 7.01 143
  5.40 7.74 129
  6.30 8.89 112
76.1 3.65 6.52 153
  4.05 7.20 139
  4.50 7.95 126
  4.85 8.52 117
  5.40 9.41 106
  6.30 10.84 92
88.9 4.05 8.47 99
  4.50 9.36 107
  4.85 10.05 99
  5.40 11.12 90
  6.30 12.83 78
101.6 4.05 9.74 103
  4.50 10.78 93
  4.85 11.57 86
  5.40 12.81 78
  6.30 14.81 68
108.0 4.05 10.38 96
  4.85 12.34 81
  6.30 15.80 63
114.3 4.50 12.19 82
  4.85 13.09 76
  5.40 14.50 69
  6.30 16.78 60
127 4.50 13.60 74
  4.85 14.61 68
  5.40 16.19 62
  6.30 18.75 53

TOLERANCE

1. Outsider Diameter +/-0.8%
2. Ovality below 168.3mm OD 0.5mm
3. Ovality including 168.3mm and above 1.0mm
4. Weight kg/Mtr: Single tube +/-io%
5. For truck load of ten tonne +/-7.5%
6. Thickness +/-10%
Outside
Diameter
mm		 Thickness
mm		 Mass
Kg/mtr.		 Mtr./
tonne
133.0 4.50 14.30 70
  5.40 16.99 59
  6.30 19.69 51
139.7 4.50 15.00 67
  4.85 16.13 62
  5.40 17.90 56
  6.30 20.73 48
152.4 4.50 16.40 61
  4.85 17.65 57
  5.40 19.50 51
  6.30 22.70 44
159.0 4.50 17.10 58
  4.85 18.44 54
  5.40 20.46 49
  6.30 23.72 42
165.1 4.50 17.80 56
  4.85 19.17 52
  5.40 21.27 47
  6.30 24.67 41
168.3 4.50 18.20 55
  4.85 19.55 51
  5.40 21.69 46
  6.30 25.17 40
193.7 5.4 25.10 40
  6.30 29.12 34
219.1 5.40 28.50 35
  6.30 33.06 30
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