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Welded Stainless Steel Tube

Welded Stainless Steel Tube


Table of Contents


Stainless Steel Welding Tubing

What is Stainless Steel Welded Tube?

The process of creating a Welded Stainless Steel Tube involves rolling stainless steel strips into the shape of a tube, then welding the longitudinal seam. There are two methods for creating welded tubing: hot forming and cold forming.

Welded Stainless Steel Tube with TIG, FCAW Welding Methods

SS ERW Pipe Welding Methods

  • TIG welding
  • Submerged Arc welding
  • Arc welding
  • Oxyacetylene welding
  • Electron beam welding
  • FCAW welding
  • Gas metal arc welding
  • Electroslag welding
  • Resistance welding
  • Other welding techniques
  • Stick welding
  • MIG welding
  • Forge welding
  • Atomic hydrogen welding
  • Gas welding

Stainless Steel Welded Tubes Specification

 

 

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Welded Stainless Steel Tubing Size Range

  • 8" NB to 24" NB
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Stainless Steel Welded Tubes Thickness

  • 0.5 to 150mm Thick

 

 

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Welded Steel Pipe Dimensions

  • ASTM,ASME,API
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Stainless Steel Welded Type

  • Electric resistance welded

 

 

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Feedwater Heater Tubing

  • A/SA 688, A/SA 803
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Instrumentation & General Service

  • A/SA 269

 

 

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Stainless Steel Welded Pipes End

  • Plain end
  • Beveled end
  • Treaded
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Welded Stainless Steel Pipe Length

  • Single random
  • Double random
  • Cut length

 

 

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SS Welded Pipe Processing

  • Cut-to-length
  • Polishing
  • Polished Grit 120 - 600
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Stainless Steel Welded Pipe Form

  • Round
  • Square
  • Rectangular

What is SS ERW Pipe?

Stainless steel Electric resistance welded pipe, or ERW pipe for short, is a carbon steel pipe that has been lightly coated in chromium to increase corrosion resistance. ERW pipe is a type of welding in which two metal components are heated with an electric current to permanently fuse the metal at the connection.

View Manufacturing Process of Welded Steel Pipe Suitable for Corrosive or High-Temperature Service

Welded Pipe Manufacturing

Welded Pipe Manufacturing

Suitable Grades of Welding Consumables?

Base Material Welding Consumables
EN 10088 Number AISI Grade EN 1600 EN 12072 EN 12073
1.4301 304 E 19 9 G 19 9 L T 19 9 L
1.4306/1.4307 304L E 19 9 L G 19 9 L T 19 9 L
1.4318 301L E 19 9 L G 19 9 L T 19 9 L
1.4833 309S E 22 12 G 22 12 H T 22 12 H
1.4845 310S E 25 20 G 25 20 T 25 20
1.4438 317L E 19 13 4 N L G 19 13 4 L T 19 13 4 N L
1.4310 301 E 19 9 G 19 9 L T 19 9 L
1.4438 317L E 19 13 4 N L G 19 13 4 N L T 19 13 4 N L
1.4510 430Ti (439) E 23 12 L G 23 12 L T 23 12 L
1.4521 444 E 19 12 3 L G 19 12 3 L T 19 12 3 L
1.4512 409 E 19 9 L G 19 9 L T 13 Ti
1.4541 321 E 19 9 Nb G 19 9 Nb T 19 9 Nb
1.4401 316 E 19 12 2 G 19 12 2 L T 19 12 2 L
1.4016 430 E 17 or 19 9 L G 17 or 19 9 L T 17 or 19 9 L
1.4509 441 E 23 12 L G 23 12 L T 23 12 L
1.4404 316L E 19 12 3 L G 19 12 3 L T 19 12 3 L
1.4362 (2304) E 25 7 2 N L G 25 7 2 N L T 22 9 3 N L
1.4462 (2205) E 25 7 2 N L G 25 7 2 L T 22 9 3 N L
1.4006 410 E 13 or 19 9 L G 13 or 19 9 L T 13 or 19 9 L
1.4571 316Ti E 19 12 3 Nb G 19 12 3 Nb T 19 12 3 Nb
1.4113 434 E 19 12 3 L G 19 12 3 L T 19 12 3 Nb
1.4021 420 E 13 or 19 9 L G 13 or 19 9 L T 13 or 19 9 L
1.4028 420 E 13 or 19 9 L G 13 or 19 9 L T 13 or 19 9 L

How to Weld SS ERW Pipe with Tig Welding Wire?

E308/E308L are the most popular TIG filler wires, however you should always try to choose a filler material that matches the welded stainless alloy. The welded material should have a greater thickness than the filler wire. If it's thicker, melting the wire will require more heat than melting the base metal.

TIG Filler Wire Type Welded Stainless Steel Alloys
E308 301, 302, 304L, 321
E309 304, 304L, 309, 309L, it’s also used to weld stainless to carbon steel
E316 316, 316L

How to Weld Stainless Steel Tube without Purging?

This technique produces excellent welds without the need for purging gas by combining cutting-edge welding supplies and equipment with adjusted welding settings. Welders can now cut costs and time without sacrificing the quality of their work. Miller® RMD®, an alternative to conventional TIG welding, does away with the requirement for gas purging throughout the stainless steel pipe welding process. The primary use for RMD®, a modified form of short-circuit GMAW, is pipe root pass welding. The GMAW gun's fine control over metal transfer means that shielding gas is not greatly disturbed as it escapes. This shielding gas successfully displaces oxygen and ambient air via the pipe's open root. The back of the weld is prevented from oxidizing in this way.

Welding without Purging Gas

Difference between Electric Resistance Welded Steel Pipe and Continuous Welded Pipe

Continuous Welded Pipe Electric Resistance Welded Pipe
It is used to produce smaller diameter sizes from NPS 1/8” to NPS 4”.  It is normally produced in sizes from NPS 2” thru NPS 24.
Production process is simple.  High frequency weld (HFW) process.
It is in hot-formed. It is in cold-formed.
Utilized for supply of water and gas. Use in new pipeline construction.
Stronger Harder
Smooth weld seam Bump at weld seam

ASTM Standard of Welded Pipe

  • ASTM A - 270, 249
  • ASTM A - 312, 269
  • ASTM A - 213, 268
  • ASTM A - 358, 106

Check Tensile Strength of Welded Stainless Steel Tubing

Properties of SS Welded Tubing

Tensile Strength 515 MPa min 75,000 psi min
Yield Strength 205 MPa min -
30,000 psi min -
Total Elongation Under Load 30.000 % -
Hardness 22 Max HRC -

Chemical Composition of Welded Stainless Steel Pipe

Steel Grade Cr% Max. Ni% Max. Si% Max. C% Max. P% Max. Mn% Max. Mo% Max. S% Max. Other
SUS201 16.0-18.0 3.5-5.5 1.0 0.15 0.06 5.5-7.5 - 0.03 N: 0.25
SUS202 17.0-19.0 4.0-6.0 1.0 0.15 0.06 7.5-10.0 - 0.03 N: 0.25
SUS304 18.0-20.0 8.0-10.5 1.0 0.08 0.045 2.0 - 0.03 -
SUS304L 18.0-20.0 9.0-13.0 1.0 0.03 0.045 2.0 - 0.03 -
SUS316L 16.0-18.0 12.0-15.0 1.0 0.03 0.045 2.0 2.0-3.0 0.03 -
Stainless Steel Pipe Welding with Austenitic, Duplex, Ferritic SS Types

Types of Stainless Steel Welded Pipe

SS Types Grades
Austenitic Stainless Steel Pipes 304/L/N, 316/L/N, 317/L, 321, 347
Duplex Stainless Steel Pipes 2101, 2205, 2507
Ferritic Stainless Steel Pipes 430, 439, SEA-CURE®
Martensitic Stainless Steel Pipes 410, 420, 430F, 440C, 431, 630 (17/4PH)

Applications Of Stainless Steel Welded Tubes

Applications Of Stainless Steel Welded Tubes
Find Here Testing Methods of Welded Pipe and Welded Stainless Steel Tubing

Testing Methods for Stainless Steel Welded Tubing

  • Hardness Test
  • Burst Test
  • Copper Sulfate Test
  • Electromagnetic Test
  • Visual Inspection
  • Eddy Current Technique
  • Hydrostatic Test
  • Tensile Test

Tolerance Chart of Welded Tube

O.D. Inches O.D. +/- Inches Wall Thickness Inches
1 to 1-1/2″ incl. .008 .025 to .065
.010 Over .065 to .134
1/2″ to 1″ incl. .005 .025 to .065
.010 Over .065 to .134
2″ to 2-1/2″ incl. .012 .032 to .065
.013 Over .065 to .109
.014 Over .109 to .165
1-1/2″ to 2″ incl. .010 .025 to .049
.011 Over .049 to .083
.012 Over .083 to .148
3-1/2″ to 5″ incl. .020 .083 to .165
.025 Over .165 to .220
2-1/2″ to 3-1/2″ incl. .014 .032 to .165
.020 Over .165 to .220

SS Welded Tube Gauge Chart

O.D./In. Wt./Ft. Wall/In.
.500 .236 .049
.625 .221 .035
.750 .476 .065
.875 .314 .035
1.000 .813 .083
1.000 .498 .049
1.000 .649 .065
1.250 .823 .065
1.250 .629 .049
1.500 .996 .065
1.500 .548 .035