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Stainless Steel ERW Pipes Manufacturer and Supplier in India

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Stainless Steel ERW Pipes (1)

Stainless Steel ERW Pipes are ERW (electric resistance welded) pipes manufactured by welding the edges of stainless steel strips together with electric resistance welding without using the filler metal, in order to form a continuous round pipe. These welded pipes can be found in various grades such as SS 304 ERW Pipes, SS 304L, Stainless Steel 316 ERW Pipe, and SS 316L, which are known to be highly resistant to corrosion and have uniform wall thickness. These pipes are relatively cheaper than seamless pipes. ASTM A312 / ASME SA312 applies to seamless and longitudinally welded austenitic stainless steel pipe. This product is not actually called ERW, but we sell this product as ASTM A312 welded. The dimensions are standardized by ASME B36.19M. SS ERW pipes have been utilized broadly in the chemical handling, water treatment, food handling, building services and standard engineering. Sachin Steel Centre is an important company for the supply of Stainless Steel ERW Pipes to industrial buyers in Mumbai as well as abroad in India.

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Table Of Content

Technical Data

Specifications of Stainless Steel ERW Pipes

Parameter

Detail

Standards

ASTM A312 / ASME SA312 straight-seam welded; applicable tubing standards include ASTM A269, A249, A554, and A778 where tube or as-welded supply applies

Grades

TP304, TP304L, TP316, TP316L (Other grades on request)

Dimensions

ASME B36.19M

Size Range

NPS 1/2 to 12 (DN 15 to DN 300) as charted below; larger sizes available on request

Schedules

Sch 5S, Sch 10S, Sch 40S, Sch 80S

Length Options

Single Random (5 to 7 m), Double Random (10 to 12 m), Cut-to-length

End Finish

Plain End (PE), Bevelled End (per ASME B16.25), Threaded on request

Surface Finish

Annealed & Pickled (AP), 2B, No.4, Polished

Manufacturing Process & Condition

Longitudinally electric resistance welded from strip without filler metal, solution annealed, and rapidly cooled

Quality Testing

Hydrostatic test or non-destructive electrical test (Eddy Current / UT) on each length per ASTM A312

Certifications

Material Test Certificate (MTC) to EN 10204 3.1 per lot; EN 10204 3.2 Third-Party Inspection on request

Chemical Composition of Stainless Steel ERW Pipe

Element

TP304 (S30400)

TP304L (S30403)

TP316 (S31600)

TP316L (S31603)

Carbon (C)

0.08% max

0.035% max

0.08% max

0.035% max

Manganese (Mn)

2.00% max

2.00% max

2.00% max

2.00% max

Phosphorus (P)

0.045% max

0.045% max

0.045% max

0.045% max

Sulphur (S)

0.030% max

0.030% max

0.030% max

0.030% max

Silicon (Si)

1.00% max

1.00% max

1.00% max

1.00% max

Chromium (Cr)

18.0 to 20.0%

18.0 to 20.0%

16.0 to 18.0%

16.0 to 18.0%

Nickel (Ni)

8.0 to 11.0%

8.0 to 13.0%

11.0 to 14.0%

10.0 to 15.0%

Molybdenum (Mo)

n/a

n/a

2.00 to 3.00%

2.00 to 3.00%

EN Number / Werkstoff

1.4301

1.4307

1.4401

1.4404

Physical & Mechanical Properties of SS ERW Pipes

Property / Parameter

Grades 304 / 304L

Grades 316 / 316L

Density

8000 kg/m³ (8.0 g/cm³)

8000 kg/m³ (8.0 g/cm³)

Elastic Modulus (E)

193 GPa

193 GPa

Thermal Expansion (0–100 °C)

17.2 µm/m°C

15.9 µm/m°C

Thermal Expansion (0–315 °C)

17.8 µm/m°C

16.2 µm/m°C

Thermal Expansion (0–538 °C)

18.4 µm/m°C

17.5 µm/m°C

Thermal Conductivity (at 100 °C)

16.2 W/m·K

16.3 W/m·K

Thermal Conductivity (at 500 °C)

21.5 W/m·K

21.5 W/m·K

Specific Heat (0–100 °C)

500 J/kg·K

500 J/kg·K

Electrical Resistivity

720 nΩ·m (72 µΩ·cm)

740 nΩ·m (74 µΩ·cm)

Tensile Strength (min)

515 MPa (304) / 485 MPa (304L)

515 MPa (316) / 485 MPa (316L)

Yield Strength (min)

205 MPa (304) / 170 MPa (304L)

205 MPa (316) / 170 MPa (316L)

Elongation (min)

35%

35%

Hardness (max)

90 HRB / 192 HBW

90 HRB / 192 HBW

Pressure Rating Chart of Stainless Steel ERW Pipe

Nominal Size - NPS (inches)

SCH

OD (inches)

Wall Thickness (inches)

ID (inches)

Bursting Internal Pressure (psi)

Collapsing External Pressure (psi)

1/8

10

0.405

0.049

0.307

18,150

7,468

1/8

40

0.405

0.068

0.269

25,195

10,761

1/8

80

0.405

0.095

0.215

35,185

15,441

1/4

10

0.540

0.065

0.410

18,055

7,425

1/4

40

0.540

0.088

0.364

24,444

10,415

1/4

80

0.540

0.119

0.302

33,055

14,445

3/8

10

0.678

0.065

0.545

14,380

5,705

3/8

40

0.678

0.091

0.493

20,132

8,397

3/8

80

0.678

0.126

0.423

27,876

12,021

1/2

5

0.840

0.065

0.710

11,607

4,407

1/2

10

0.840

0.083

0.674

14,821

5,911

1/2

40

0.840

0.109

0.622

19,464

8,084

1/2

80

0.840

0.147

0.546

26,250

11,260

3/4

5

1.050

0.065

0.920

9,285

3,295

3/4

10

1.050

0.083

0.884

11,857

4,524

3/4

40

1.050

0.113

0.824

16,142

6,529

3/4

80

1.050

0.154

0.742

22,000

9,271

1

5

1.315

0.065

1.185

7,414

2,445

1

10

1.315

0.109

1.097

12,433

3,795

1

40

1.315

0.133

1.049

15,171

6,075

1

80

1.315

0.179

0.957

20,418

8,530

1 1/4

5

1.660

0.065

1.530

5,873

1,725

1 1/4

10

1.660

0.109

1.442

9,849

3,585

1 1/4

40

1.660

0.140

1.380

12,650

3,895

1 1/4

80

1.660

0.191

1.278

17,259

7,052

1 1/2

5

1.900

0.065

1.770

5,131

1,376

1 1/2

10

1.900

0.109

1.682

8,605

3,002

1 1/2

40

1.900

0.145

1.610

11,447

4,332

1 1/2

80

1.900

0.200

1.500

15,789

6,364

2

5

2.375

0.065

2.245

4,105

896

2

10

2.375

0.109

2.157

6,884

2,196

2

40

2.375

0.154

2.067

9,726

3,526

2

80

2.375

0.218

1.939

13,768

5,418

2 1/2

5

2.875

0.083

2.709

4,330

1,001

2 1/2

10

2.875

0.120

2.635

6,260

1,905

2 1/2

40

2.875

0.203

2.469

10,591

3,931

3

5

3.500

0.083

3.334

3,557

639

3

10

3.500

0.120

3.260

5,142

1,375

3

40

3.500

0.216

3.068

9,257

3,307

3 1/2

5

4.000

0.083

3.834

3,112

431

3 1/2

10

4.000

0.120

3.760

4,500

1,081

4

5

4.500

0.083

4.334

2,766

315

4

10

4.500

0.120

4.260

4,000

845

4

40

4.500

0.237

4.026

7,900

2,672

5

5

5.563

0.109

5.345

2,949

350

5

10

5.563

0.134

5.295

3,613

665

6

5

6.625

0.109

6.407

2,467

129

6

10

6.625

0.134

6.357

3,033

394

Dimensions, Schedules & Weight Chart of SS ERW Pipe

NPS

OD (mm)

Sch 10S Wall & Weight

Sch 40S Wall & Weight

Sch 80S Wall & Weight

1/2″

21.34 mm

2.11 mm · 1.02 kg/m

2.77 mm · 1.29 kg/m

3.73 mm · 1.65 kg/m

3/4″

26.67 mm

2.11 mm · 1.30 kg/m

2.87 mm · 1.72 kg/m

3.91 mm · 2.24 kg/m

1″

33.40 mm

2.77 mm · 2.13 kg/m

3.38 mm · 2.55 kg/m

4.55 mm · 3.30 kg/m

1-1/2″

48.26 mm

2.77 mm · 3.17 kg/m

3.68 mm · 4.12 kg/m

5.08 mm · 5.51 kg/m

2″

60.33 mm

2.77 mm · 4.01 kg/m

3.91 mm · 5.54 kg/m

5.54 mm · 7.63 kg/m

3″

88.90 mm

3.05 mm · 6.58 kg/m

5.49 mm · 11.57 kg/m

7.62 mm · 15.57 kg/m

4″

114.30 mm

3.05 mm · 8.53 kg/m

6.02 mm · 16.38 kg/m

8.56 mm · 22.75 kg/m

6″

168.28 mm

3.40 mm · 14.09 kg/m

7.11 mm · 28.80 kg/m

10.97 mm · 43.37 kg/m

8″

219.08 mm

3.76 mm · 20.35 kg/m

8.18 mm · 43.36 kg/m

12.70 mm · 65.87 kg/m

10″

273.05 mm

4.19 mm · 28.31 kg/m

9.27 mm · 61.46 kg/m

12.70 mm · 83.10 kg/m

12″

323.85 mm

4.57 mm · 36.67 kg/m

9.53 mm · 75.28 kg/m

12.70 mm · 99.31 kg/m

Different Types of Stainless Steel ERW Pipes

Stainless Steel 304 ERW Pipe
Stainless Steel 304 ERW Pipe
Stainless Steel 304L ERW Pipe
Stainless Steel 304L ERW Pipe
Stainless Steel 316 ERW Pipe
Stainless Steel 316 ERW Pipe
Stainless Steel 316L ERW Pipe
Stainless Steel 316L ERW Pipe

Applications and Industrial Uses of Stainless Steel ERW Pipes

  • Oil and Gas Industry
  • Chemical Processing Plants
  • Food and Beverage Processing
  • Pharmaceutical Manufacturing
  • Water Treatment and Desalination Plants
  • Power Generation Plants
  • Petroleum Refineries
  • Industrial Fluid Transportation Systems
Application Industries

Frequently Asked Questions

Stainless steel ERW pipes are manufactured from stainless steel strip formed into a round shape and joined by a longitudinal resistance weld without filler metal, normally supplied to ASTM A312 as welded pipe.

Seamless pipe is formed from a pierced solid billet and has no weld seam; ERW pipe is formed from strip and welded along a longitudinal seam. ASTM A312 covers both types, so specify whether you require welded or seamless on your enquiry.

ASTM A312 covers seamless and straight-seam welded austenitic pipe. It does not explicitly use the term ERW, so specify “ASTM A312 welded”. ASTM A358 covers fusion-welded pipe made with filler metal.

Pipe is sized by Nominal Pipe Size (NPS) and schedule per ASTM A312; tube is sized by actual outside diameter (OD) and wall thickness per ASTM A269, A249, or A554 for heat-exchanger, mechanical, and structural applications.

Allowable pressure depends on the grade, operating temperature, wall thickness, weld joint quality factor, and piping design code. For critical or cyclic high-pressure service, seamless pipe is usually specified. Send us your design conditions for advice.

Choose seamless pipe for high-pressure, thermal-cyclic, or critical service where a weld seam is a design concern. ERW pipe is well suited for general process, food, water, and building services at moderate pressures.

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