📧 Email: sales@usapipingsolution.com
☰

Stainless Steel 347 Welded Tubes Manufacturer & Supplier

Request Quotation

Stainless Steel 347 Welded Tubes Manufacturer & Supplier

USA Piping Solution is an ISO certified manufacturer, stockist and exporter of Stainless Steel 347 Welded Tubes also called as SS 347 Welded Tubes or SS 347 ERW Tubes. These tubes are made from niobium stabilised austenitic stainless steel strip or plate and are welded together by the process of electric resistance welding or electric fusion welding. SS 347 Welded Tubes are available in solution annealed condition and are particularly suitable for long service life at high temperature where the resistance to intergranular corrosion is critical. SS 347 Welded Tubes are manufactured to the ASTM A249, ASTM A269, and ASTM A554 standards. As an integral part of our quality plan our welded tubes for heat exchangers, boilers and superheaters are tested for weld integrity, eddy current and hydrostatic testing at 100%.

Stainless Steel 347 Welded Tubes Specifications

Parameter

Details

Grade

SS 347 / SS 347H

Standard

ASTM A249 / ASME SA249, ASTM A269, ASTM A554

Manufacturing Method

ERW (Electric Resistance Welded), EFW (Electric Fusion Welded)

OD Range

6.35 mm to 304.80 mm

Wall Thickness

0.5 mm to 12.70 mm

Length

Random or cut to length up to 12 m

Schedule

SCH 5S, SCH 10S, SCH 20S, SCH 40S

End Finish

Plain End, Beveled End

Surface Finish

2B, No. 4, BA, Electropolished, Pickled

Delivery Condition

Solution Annealed

Testing

Hydrostatic Test, Eddy Current Test, Flattening Test, PMI

Documentation

EN 10204 3.1, Mill Test Certificate, Third Party Inspection

Types of SS 347 Welded Tubes

  • ASTM A249 SS 347 Welded Tubes
  • ASTM A269 SS 347 Welded Tubes
  • ASTM A554 SS 347 Welded Tubes
  • SS 347H Welded Tubes
  • SS 347 ERW Tubes
  • SS 347 EFW Tubes
  • SS 347 Boiler Welded Tubes
  • SS 347 Heat Exchanger Welded Tubes
  • SS 347 Condenser Welded Tubes
  • SS 347 Large Diameter Welded Tubes
  • SS 347 Ornamental Welded Tubes

We stock SS 347 Welded Tubes in UNS S34700 and S34709 — OD 6.35 mm to 304.80 mm, EN 10204 3.1 certified, ready for immediate dispatch.

Contact USA Piping Solution for a same-day quote.

Request Quotation

Chemical Composition of SS 347 Welded Tubes

Element

SS 347

SS 347H

Carbon (C)

0.08% max

0.04 to 0.10%

Manganese (Mn)

2.00% max

2.00% max

Silicon (Si)

0.75% max

0.75% max

Phosphorus (P)

0.045% max

0.045% max

Sulfur (S)

0.030% max

0.030% max

Chromium (Cr)

17.00 to 19.00%

17.00 to 19.00%

Nickel (Ni)

9.00 to 13.00%

9.00 to 13.00%

Niobium + Tantalum (Nb + Ta)

10 x C min, 1.10% max

8 x C min, 1.10% max

Mechanical Properties of SS 347 Welded Tubes

Property

SS 347

SS 347H

Tensile Strength (min)

515 MPa

515 MPa

Yield Strength 0.2% (min)

205 MPa

205 MPa

Elongation in 2 in. (min)

40%

40%

Brinell Hardness

217 HB max

217 HB max

Rockwell B Hardness

95 HRB max

95 HRB max

ASTM A269 TP347/347H Stainless Steel Welded Tubes Equivalent Grades

STANDARD

UNS

DIN

EN

AFNOR

JIS

BS

347

S34700

1.4550

X6CrNiNb18-10

Z6CNNb18-10

SUS347

347S31

347H

S34709

1.4961/1.4912

X6CrNiNb18-12 /X7CrNiNb18-10

Z2CND17-11 / Z2CND18-13 / Z8CNNb18-10

SUS347H

347S17

Physical Properties 347 Stainless Steel Welded Pipe

Coefficient of
Thermal Expansion (min/in)-°F
at 68 to 212°F

Coefficient of
Thermal Expansion (min/in)-°F
at 68 to 1832°F

Density
lbm/in3
at 68 °F

Specific Heat BTU/lbm -°F
at 32 to 212°F

Thermal Conductivity BTU/hr-ft-°F
68-932°F

Modules of Elasticity (annealed)2-psi
in tension (E)

9.2

11.4

0.288

0.12

14.7

28 x 106

Weld Quality and Testing Requirements for SS 347 Welded Tubes

Test

Method

Standard Requirement

Hydrostatic Test

Per ASTM A249

No leakage at test pressure

Eddy Current Test

Per ASTM E309

Used as substitute for hydrostatic

Flattening Test

Per ASTM A249 Section 11

No cracks or openings in weld

PMI (Positive Material Identification)

XRF Analyzer

Grade verification

IGC Test

ASTM A262 Practice E

Resistance to intergranular corrosion

Dye Penetrant Test

ASTM E165

Optional per customer requirement

Radiographic Test

ASTM E94

For EFW tubes per customer specification

SS 347 Welded Tube Size Range (ASTM A249)

OD (mm)

Min Wall (mm)

Max Wall (mm)

6.35 to 12.70

0.70

2.11

12.70 to 25.40

0.90

3.05

25.40 to 50.80

1.20

5.08

50.80 to 101.60

1.60

7.62

101.60 to 203.20

2.00

9.65

203.20 to 304.80

2.40

12.70

Dimensions of Stainless Steel TP347/347H Welded Tubes

Size
OD, Inches

BW
Ga.

Wall
Dec-In.

ID

Weight
Lbs/Ft.

1/8

22

0.028

0.069

0.0290

20

0.035

0.055

0.0336

3/16

22

0.028

0.131

0.0478

1/4

25

0.020

0.210

0.0491

22

0.028

0.194

0.0664

21

0.032

0.187

0.0745

20

0.035

0.180

0.0804

18

0.049

0.152

0.1052

16

0.065

0.120

0.1284

5/16

20

0.035

0.242

0.1039

18

0.049

0.214

0.1382

16

0.065

0.182

0.1722

3/8

22

0.028

0.319

0.1038

20

0.035

0.305

0.1271

18

0.049

0.277

0.1706

16

0.065

0.245

0.2152

7/16

18

0.049

0.340

0.2036

1/2

25

0.020

0.460

0.1025

20

0.035

0.430

0.1738

18

0.049

0.402

0.2360

16

0.065

0.370

0.3020

5/8

20

0.035

0.555

0.2205

18

0.049

0.527

0.3014

16

0.065

0.495

0.3888

3/4

20

0.035

0.680

0.2673

18

0.049

0.652

0.3668

16

0.065

0.620

0.4755

14

0.083

0.584

0.5913

7/8

18

0.049

0.777

0.4323

16

0.065

0.745

0.5623

11

0.120

0.635

0.9676

1

20

0.035

0.930

0.3607

18

0.049

0.902

0.4977

16

0.065

0.870

0.6491

14

0.083

0.834

0.8129

11

0.120

0.760

1.1278

1-1/4

11

0.120

1.010

1.4480

Applications of SS 347 Welded Tubes

Industry

Application

Power Generation

Boiler tube panels, superheater outlet headers

Oil and Gas

High temperature transfer lines, refinery column tubing

Chemical Processing

Reactor feed tubes, distillation unit pipework

Heat Exchangers

Shell and tube heat exchanger bundles

Aerospace

Exhaust ducting, aircraft nacelle components

Pharmaceutical

Sterile process tubing, WFI distribution

Food Processing

High temperature CIP lines, pasteurizer tubes

Related Products

FAQs

What is the largest OD available for SS 347 Welded Tubes?

We supply SS 347 Welded Tubes up to 304.80 mm OD as standard, with larger diameters available on request for specific project and fabrication requirements.

Can you supply SS 347 Welded Tubes for a one-time project order?

Yes, we handle both one-time project orders and recurring supply contracts, with the same documentation, testing, and quality standards applied to every order size.

Is radiographic testing available for SS 347 EFW tubes?

Yes, radiographic testing per ASTM E94 is available for SS 347 EFW tubes on customer request, in addition to standard hydrostatic and eddy current testing.

What freight or shipping options are available for bulk orders?

We coordinate sea freight, air freight, and inland transport depending on destination, order size, and delivery deadline, with export packing included for all shipments.

Order SS 347 Welded Tubes in Any Quantity

USA Piping Solution stocks SS 347 Welded Tubes in standard and large diameters for immediate dispatch. We accommodate both small quantity orders and large project requirements with full documentation.

Request Quotation

Product Grades

Our Blog List

Request a Quote

We respect your privacy.