Stainless steel welded pipe

Table of Content

What is a stainless steel welded pipe?

These robust pipes get manufactured from strips or sheets rolled into tubular shapes and welded longitudinally. Mills can use hot forming or cold forming for a stainless steel welded pipe. The latter translates into finer precision and a smoother finish.

SS welded round pipes and stainless steel ERW pipe supplier in Mumbai

Why does a stainless steel spiral pipe shrink when welded?

Spiral piping gets produced from a coil rolled per a specified helical angle. A stainless steel spiral pipe is a fixture in the air conditioning sector.

Shrinkage during welding a stainless steel spiral welded pipe is natural since thermal contraction acts on the metal upon cooling. Resulting distortion in a spiral welded stainless steel pipe can get minimized by fewer welding passes.

Distributor and manufacturer of stainless steel spiral pipe in Mumbai. Check the stainless steel welded pipes pressure rating

What is the manufacturing process for an SS welded pipe?

The process entails forming the plate or strip into a tube and welding. An SS ERW pipe uses electric resistance welding and delivers dependability with cost-effectiveness.

An stainless steel EFW pipe, which uses electric fusion welding, has higher strength. Manufacturers pick SSAW or LSAW (Spiral or Longitudinally Submerged Arc Welding). They offer greater precision and stringent tolerance than a stainless steel ERW pipe.

ANSI B36.19 welded stainless steel pipe are used in various applications such as petroleum, oil, and gas

SS welded pipe specification

Grade Other trade name & equivalent Length
300 Series, 304, 304l, 316, 316l, 347, 409, 410
  • SUS 304
  • AISI 304l
  • INOX 316
Double, Single random or Cut to size
Origin Toleranceof SS welded pipes Delivery Time
Indian, China ±10% 1-2 days
Available size in stock Wall thickness Brand Name
1/2 inch NB to 24 inch NB 1 milimeter to 20 milimeter Sona, steel 568
Surface finish Types Shapes
  • Bright
  • Annealing
  • BA Finis
  • Cold Finish
  • No.4 finish
  • Polished, Pickling
ERW, Welded, Fabricated, LSAW Square, rectangle, round
Standard Manufacturing technique Schedule
  • Guojia biaozhun(GB)
  • European standards (EN)
  • AISI
  • ASTM/ ASME (American)
  • Japanese industrial standards (JIS)
  • German standard (DIN)
  • GOST
Hot or cold formed
  • Sch 10
  • Sch 20
  • Sch 40
  • Sch 60
  • Sch 80
  • Sch 120
Mill Processing Packing
As per EN 10204 3.1/3.2
  • Bending
  • Decoiling
  • Welding
  • Cutting
  • Bundle form
  • Bundle packaging
  • Container packaging
Testing methods done Value added service Application of SS ERW pipes
  • Hardness test
  • PMI test
  • Tensile test
  • Third party inspection
  • Fatigue mechanics test
  • Impact test
  • Beveling
  • Heat treating
  • Polishing
  • Ut test
  • Oil and Gas Processing
  • Pulp and Paper sector
  • Power Plants sector
  • Construction
  • Textile Machinery
Various destructive & non destructive tests are performed on stainless steel spiral welded pipe

Types of ss welded pipes

Refer ERW stainless steel pipe dimension chart

SS welded tube pressure rating

Size Outer dia 5 5s 10 10s 40 40s & STD
1/4 0.54 0.049 0.065 0.065 0.088 0.088
0.257 0.3297 0.3297 0.4248 0.4248
1/8 0.405 0.35 0.049 0.049 0.068 0.068
0.1383 0.1863 0.1863 0.2447 0.2447
1/2 0.84 0.065 0.065 0.083 0.083 0.109 0.109
0.5383 0.5383 0.671 0.671 0.851 0.851
3/8 0.675 0.049 0.065 0.065 0.091 0.091
0.3276 0.4235 0.4235 0.5676 0.5676
1 1.315 0.065 0.065 0.19 0.109 0.133 0.133
0.8678 0.8678 1.404 1.404 1.679 1.679
3/4 1.05 0.065 0.065 0.083 0.083 0.113 0.113
0.6838 0.6838 0.8572 0.8572 1.131 1.131
1 1/2 1.9 0.065 0.065 0.109 0.109 0.145 0.145
1.274 1.274 2.638 2.638 2.718 2.718
1 1/4 1.66 0.065 0.065 0.109 0.109 0.14 0.14
1.107 1.107 1.806 1.806 2.273 2.273
2 1/2 2.875 0.083 0.083 0.12 0.12 0.203 0.203
2.475 2.475 3.531 3.531 5.793 5.793
2 2.375 0.065 0.065 0.109 0.109 0.154 0.154
1.604 1.604 2.638 2.638 3.653 3.653
3 1/2 4 0.083 0.083 0.12 0.12 0.226 0.226
3.472 3.472 4.97 4.97 9.109 9.109
3 3.5 0.083 0.083 0.12 0.12 0.216 0.216
3.029 3.029 4.332 4.332 7.576 7.576
4 4.5 0.083 0.083 0.12 0.12 0.237 0.237
3.915 3.915 5.613 5.613 10.79 10.79
6 6.625 0.109 0.109 0.134 0.134 0.28 0.28
7.585 7.585 9.289 9.289 18.97 18.97
5 5.563 0.109 0.109 0.134 0.134 0.258 0.258
6.349 6.349 7.77 7.77 14.62 14.62
8 8.625 0.109 0.109 0.148 0.148 0.322 0.322
9.914 9.914 13.4 13.4 28.55 28.55
7 7.625 0.301
23.57
9 9.625 0.342
33.9
10 10.75 0.134 0.134 0.165 0.165 0.365 0.365
15.19 15.19 18.65 18.65 40.48 40.48
14 14 0.156 0.25 0.188 0.437 0.375
23.06 36.71 27.73 63.67 54.57
12 12.75 0.165 0.156 0.18 0.18 0.406 0.375
22.18 21.07 24.2 24.2 53.53 49.56
18 18 0.165 0.25 0.188 0.562 0.375
31.43 47.39 35.76 104.8 70.59
16 16 0.165 0.25 0.188 0.5 0.375
27.9 42.05 31.75 82.77 62.58
24 24 0.218 0.25 0.25 0.687 0.375
55.37 63.41 63.41 171.2 94.62
20 20 0.188 0.25 0.218 0.593 0.375
39.78 52.73 46.05 122.9 78.6
26 26 0.312 0.375
85.6 102.6
30 30 0.25 0.312 0.312 0.375
79.43 98.93 98.93 118.6
34 34 0.312 0.688 0.375
112.3 244.8 134.7
40 40 0.375
158.7
42 42 0.375
166.7

AISI ERW square pipes weight chart

Outer dia Nominal Wall Thickness
DIA 5s .5 10S 10 20S 30 40S 40 60
MM Thk WT Kg/Mtr Thk WT Kg/Mtr Thk WT Kg/Mtr Thk WT Kg/Mtr Thk WT Kg/Mtr Thk WT Kg/Mtr Wall Thk WT Kg/Mtr Thk WT Kg/Mtr Thk WT Kg/Mtr
10.3 1 0.23 1.2 0.27 1.5 0.33 1.73 0.37
17.2 1.2 0.47 1.65 0.63 2 0.74 2.31 0.87
13.7 1.2 0.37 1.65 0.49 2 0.58 2.24 0.64
26.7 1.65 1.03 1.65 1.03 2.11 1.3 2.11 1.3 2.5 1.49 2.87 1.71
21.3 1.65 0.01 1.65 0.81 2.11 1.02 2.11 1.02 2.5 1.15 2.77 1.29
24.2 1.65 1.67 1.65 1.67 2.77 2.73 2.77 2.73 3 2.9 3.56 3.44
48.3 1.65 1.93 1.65 1.93 2.77 3.16 2.77 3.16 3 3.35 3.68 4.11
33.4 1.65 1.31 1.65 1.31 2.77 2.13 2.77 2.13 3 2.24 3.38 2.54
73 2.11 3.75 2.11 3.75 3.05 5.34 3.05 5.34 3.5 6 5.16 8.77
60.3 1.65 1.93 1.65 2.42 2.77 3.99 2.77 3.99 3.5 4.9 3.91 5.52
101.6 2.11 5.25 2.11 5.25 3.05 7.53 3.05 7.53 4 9.62 5.74 13.78
88.9 2.11 4.59 2.11 4.59 3.05 6.56 3.05 6.56 4 8.37 5.49 11.47
114.3 2.11 5.93 2.11 5.93 3.05 8.5 3.05 8.5 4.5 12.18 6.02 6.32
219.1 2.77 15 2.77 15 3.76 20.77 3.76 20.27 6.35 33.82 7.04 37.38 8.18 43.2 10.81 53.9
168.3 2.77 11.47 2.77 11.47 3.4 14.04 3.43 14.04 5.5 22.08 7.11 28.69
323.9 3.96 31.72 4.19 33.6 4.57 36.54 4.57 36.54 6.35 50.48 8.38 66.2 9.53 75.01 10.31 80.94 14.27 110.62
355.6 3.96 34.86 4.78 41.99 6.35 55.53 7.92 68.95 9.53 82.58 9.53 82.58 11.13 96 15.06 128.42
273.1 3.4 22.95 3.4 22.95 4.19 28.2 4.19 28.2 6.35 42.41 7.8 51.81 9.27 61.22 12.2 82.8
457.2 4.19 47.46 4.78 54.15 6.35 71.69 7.92 89.1 11.13 124.32 9.53 106.83 14.27 158.27 19.05 209
406.4 4.19 42.2 4.78 48.07 6.35 63.61 7.92 79.03 9.53 94.7 9.53 94.7 12.7 125.2 16.66 162.59
508 4.78 60.23 5.54 69.7 6.35 79.76 9.53 118.93 12.7 157.51 9.53 118.9 15.06 185.89 2062 251.65
914.4 7.92 179.77 12.7 286.75 15.88 357.28 9.53 215.93 19.05 427.09

EFW SS pipe dimension chart

NPS Outer dia
Inches
10 10s 40 40s & Std 80 80s. 160
1/4 .540 .065 .065 .088 .088 .119 .119
1/8 .405 .049 .049 .068 .068 .095 .095
1/2 .840 .083 .083 .109 .109 .147 .147 .187
3/8 .675 .065 .065 .091 .091 .126 .126
1 1.315 .109 .109 .133 .133 .179 .179 .250
3/4 1.050 .083 .083 .113 .113 .154 .154 .218
1 1/2 1.900 .109 .109 .145 .145 .200 .200 .281
2 2.375 .109 .109 .154 .154 .218 .218 .343
3 3.500 .120 .120 .216 .216 .300 .300 .437
4 4.500 .120 .120 .237 .237 .337 .337 .531
6 6.625 .134 .134 .280 .280 .432 .432 .718
5 5.563 .134 .134 .258 .258 .375 .375 .625
8 8.625 .148 .148 .322 .322 .500 .500 .906
7 7.625 .301 .500
10 10.750 .165 .165 .365 .365 .593 .500 1.125
9 9.625 .342 .500
12 12.750 .180 .180 .406 .375 .687 .500 1.312
11 11.750 .375 .500
16 16.000 .250 .188 .500 .375 .843 .500 1.593
14 14.000 .250 .188 .437 .375 .750 .500 1.406
18 18.000 .250 .188 .562 .375 .937 .500 1.781

Spiral welded SS pipe wall thickness

Outside Diameter inch. NPS Schedule 10S inch. Schedule 5S inch. Schedule 80S inch. Schedule 40S inch.
0.675 3/8 0.065 0.126 0.091
0.54 1/4 0.065 0.119 0.088
1.05 3/4 0.083 0.065 0.154 0.113
0.84 1/2 0.083 0.065 0.147 0.109
1.66 1 1/4 0.109 0.065 0.191 0.14
1.315 1 0.109 0.065 0.179 0.133
2.375 2 0.109 0.065 0.218 0.154
1.9 1 1/2 0.109 0.065 0.2 0.145
3.5 3 0.12 0.083 0.3 0.216
2.875 2 1/2 0.12 0.083 0.276 0.203
4.5 4 0.12 0.083 0.337 0.237
4 3 1/2 0.12 0.083 0.318 0.226
12.75 12 0.18 0.156 0.5 0.375
6.625 6 0.134 0.109 0.432 0.28
5.563 5 0.134 0.109 0.375 0.258
10.75 10 0.165 0.134 0.5 0.365
8.625 8 0.148 0.109 0.5 0.322

SS ERW pipes chemical composition

Grade Mn Nitrogen C S P Cr Si Mo Ni
304 2.00 0.10 0.08 0.030 0.045 18.00 – 20.00 0.75 8.00- 10.50
304L 2.00 0.10 0.030 0.030 0.045 18.00 – 20.00 0.75 8.00- 12.00
310S 2.00 0.08 0.030 0.045 24.00- 26.00 1.50 19.00 – 22.00
316 2.00 0.10 0.08 0.030 0.045 16.00 – 18.00 0.75 2.00 – 3.00 10.00 – 14.00
316L 2.00 0.10 0.030 0.030 0.045 16.00 – 18.00 0.75 2.00 – 3.00 10.00 – 14.00
321 2.00 0.10 0.08 0.030 0.045 17.00 – 19.00 0.75 9.00 – 12.00
347 2.00 0.08 0.030 0.045 17.00 – 19.00 0.75 9.00 – 13.00
409 1.00 0.08 0.010 0.040 10.50 – 11.75 1.00 0.50
410 1.00 0.15 0.030 0.040 11.50- 13.50 1.00 0.75

SS welded pipes mechanical composition

Grade %Age
Elongation
in 50mm
gauge L minnimum
Yield
Strength
Mpa
Tensile
Strength Mpa
Hardness (Max)
BHN Rb
304 40 205 515 201 92
304L 40 170 485 201 92
310S 40 205 515 217 95
316 40 205 515 217 95
316L 40 170 485 217 95
321 40 205 515 217 95
347 40 205 515 201 92
409 20 170 380 179 88
410 20 205 450 217 89
420 15 700( max ) 217 95

SS ERW pipes equivalent material

Grades UNS No WNR BS JIS AFNOR GOST EN
304L S30403 1.4306 / 1.4307 3304S11 SUS 304L Z3CN18‐10 03Х18Н11 X2CrNi18-9 / X2CrNi19-11
304 S30400 1.4301 304S31 SUS 304 Z7CN18‐09 08Х18Н10 X5CrNi18-10
316 S31600 1.4401 / 1.4436 316S31 / 316S33 SUS 316 Z7CND17‐11‐02 X5CrNiMo17-12-2 / X3CrNiMo17-13-3
310 S31000 1.4841 310S24 SUS 310 20Ch25N20S2 X15CrNi25-20
347 S34700 1.4550 SUS 347 08Ch18N12B X6CrNiNb18-10
316L S31603 1.4404 / 1.4435 316S11 / 316S13 SUS 316L Z3CND17‐11‐02 / Z3CND18‐14‐03 03Ch17N14M3 / 03Ch17N14M2 X2CrNiMo17-12-2 / X2CrNiMo18-14-3
904L N08904 1.4539 904S13 SUS 904L Z2 NCDU 25-20 STS 317J5L X1NiCrMoCu25-20-5

SUS welded pipes application

  • Sugar Mills
  • Food Processing
  • Paper & Pulp sector
  • Construction
  • Engineering Industries
  • Power Plants

Compare prices between India and China for a spiral wound stainless steel pipe?

India and China are among the leading suppliers of spiral wound stainless steel pipe to power plants, oil and gas industries, and pharmaceuticals. Buyers can source standard-length piping for approximately INR 99 to 200 in India.

A spiral large diameter stainless steel welded pipe from China costs $1,200 to $1,500.00 a ton. As the prices are comparable, your decision should examine the raw-material origin, quality control, availability, and shipping/delivery times.

What are the benefits of ultrasonic testing in ensuring the quality of a stainless steel EFW pipe?

Ultrasonic testing (UT) accurately diagnoses defects in a stainless steel EFW pipe, both thick and thin. Another bonus of UT testing for stainless steel welded round pipes is access to just one side and suitability for volumetric analysis.

What are the advantages of an SS Welded schedule 40 pipes over a stainless steel SSAW pipe?

An SCH 40 stainless steel welded pipe uses moderate wall thickness but shows top-notch strength and resistance to corrosion and oxidation. A downside of SSAW piping is the necessity of thorough quality inspection. This technique struggles to align the welding torch, potentially causing poorer quality than an SS welded pipe.