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We have specialization in tubing for
equipment like
- Heat Exchanger
- Heating Elements
- Surface Condensers
- Evaporators
- Digesters
- Instrumentation and Fluid Pipings.
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SizeRange
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6.0 mm OD - 273.05 mm OD
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Thickness
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0.6 mm - 10 mm
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Grades
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AISI-304, 304L, 316, 316L, 316Ti, 321,
347 and its Equivalents in DIN, NFA, JIS etc.
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Standards
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Conforming to International Specifications
of ASTM A-213, A-249, A-269, A-312, A-358, A-688 and
its equivalents in ASME, DIN, NFA, JIS etc.
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Stainless Steel Tube Manufacturing
Program
Wall thick
ness in mm.
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0.5
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0.6
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0.7
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0.8
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1.0
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1.2
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1.6
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2.0
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2.6
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3.0
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3.2
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3.6
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O.D.
in mm.
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Weight in kg/meter
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6.0
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0.069
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0.081
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0.093
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0.104
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0.125
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0.144
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0.176
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-
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-
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-
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-
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-
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9.52
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0.112
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0.134
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0.154
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0.174
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0.213
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0.249
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0.317
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-
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-
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-
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-
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-
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10.0
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0.119
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0.141
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0.163
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0.184
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0.225
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0.264
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0.336
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-
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-
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-
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-
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-
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12.7
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0.153
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0.182
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0.210
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0.238
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0.293
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0.345
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0.444
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-
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-
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-
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-
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-
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14.0
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0.169
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0.201
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0.233
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0.264
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0.325
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0.384
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0.496
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-
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-
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-
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-
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-
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15.87
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0.192
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0.229
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0.266
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0.301
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0.372
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0.440
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0.571
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0.694
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-
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-
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-
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-
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19.0
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0.231
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0.276
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0.320
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0.364
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0.450
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0.534
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0.696
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0.850
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1.066
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1.200
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1.264
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-
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25.0
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0.306
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0.366
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0.425
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0.484
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0.600
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0.714
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0.936
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1.150
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1.456
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1.650
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1.744
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1.926
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25.4
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0.311
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0.372
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0.432
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0.492
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0.610
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0.726
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0.952
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1.170
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1.482
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1.680
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1.776
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1.962
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31.8
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-
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-
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-
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-
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-
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0.918
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1.208
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1.490
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1.898
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2.160
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2.288
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2.538
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38.0
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-
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-
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-
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-
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-
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1.104
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1.456
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1.800
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2.301
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2.625
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2.784
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3.096
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44.5
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-
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-
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-
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-
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-
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1.299
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1.716
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2.125
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2.724
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3.113
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3.304
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3.681
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50.8
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-
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-
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-
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-
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-
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1.488
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1.968
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2.440
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3,133
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3.585
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3.808
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4.248
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63.5
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-
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-
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-
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-
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-
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-
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2.476
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3.075
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3.959
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4.538
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4,824
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5.391
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76.1
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-
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-
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-
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-
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-
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-
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2.980
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3.705
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4.778
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5.483
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5.832
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6.525
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101.6
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-
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-
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-
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-
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-
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-
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4.000
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4.980
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6.435
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7.395
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7,872
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8.820
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'U' bending is done by cold working process.
U' bending is done to the required radius as per customer
drawings.
The bend portion and six inch leg is stress relieved
by resistance heating.
Inert gas (Argon) is passed through it at the required
flow rate to avoid oxidation in ID.
The radius is checked for its OD and wall thinning
with the recommended specification.
The physical properties and microstructure is checked
at three different position.
Visual inspection for waviness and cracks is done
with Dye Penetrant Test.
Each tube is then hydro tested at the recommended
pressure to check for leakage.
Cotton ball test is done to check the ID cleanliness
of the tube.
Thereafter pickled, dried, marked and packed.
All procedure is strictly followed as per TEMA "C"
and ASTM A-688.
We also make tubes up to 22 meter long.
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Bead removal is done as
per the requirement of standard specifications.
Bead is cold worked and brought in level with the
base metal.
Bead rolling is made in-line before heat treatment
on tube mill.
Weld structure will thereby recrystallise &
homogenize faster in annealing process.
Which improves corrosion resistance.
Which improves easy expansion in tube sheets and
orbital welding.
Which improves easy flow and easier cleaning and
less scale deposits. |
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