Shanghai Metal Corporation
Main products:Stainless Steel Strip,Aluminium Foil,Copper Strip,Hot Dip Galvanized Steel Coil,Aluminium Tube
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  • Contact Person : Mr. manager sales
  • Company Name : Shanghai Metal Corporation
  • Tel : 86-21-5830-9368
  • Fax : 86-21-5081-9492
  • Address : Shanghai,Shanghai,1701 Yuan Mansion, 738 Dongfang Road, Shanghai City. China.
  • Country/Region : China
  • Zip : 200122

Stainless Steel Welded Pipe

Stainless Steel Welded Pipe
Product Detailed
1.Grade:201,304,etc 2.OD:8mm-101.6mm 3.WT:0.3mm-2.0mm 4.Best Quality,Good Price

Stainless Steel Welded  Pipe  

Specifications of Stainless Steel Welded Pipe

1. Standard:

ASTM A213, ASTM A312, ASTM A269, ASTM A789, JIS G3448, JIS G3456,

JIS G3459, JIS G3463, DIN 10216, DIN 17458

2. Grade:  201,202,301, 321, 304, 304L, 316, 316L, 409, etc

3. OD range: 8mm-101.6mm

4. Wall thickness range: 0.3mm-2.0mm

5. Length:  as demand 

6. Surface finish: pickling, annealing, manual polish and mechanical polish, mirror polish

7. Manufacture technology: hot rolled, cold drawn

8. Type: Seamless & Welded 

 

Applications of Welded Stainless Steel Pipe:

1).Petroleum, Chemical enterprise, super heater of boiler, heat exchanger

2).High temperature resistant transmission fluid pipe in power station

3).Ship with pressure pipe

4).The exhaust purification device

5) Construction and ornament

 

Manufacturing Process of Stainless Steel Pipe:

The process commences with the formation of welded mother tube on the tube mill from imported and tested prime quality stainless steel strips. The latest TIG multi electrode welding technique is employed for superior weld quality and 100% Fusion, with argon purging, No filler metal added.

 

These mother tubes are solution annealed at 1060 D. 1100 D. C in continuous annealing furnace followed by immediate quenching to prevent chromium carbide precipitation.

 

Annealing of mother tuber ensures:

A) Removal of stress induced during tube forming and cold drawing:

B) Sufficient ductility and softness for cold drawing:

C) Transformation of the weld zone to austenitic nature,

D) Re crystallization of metallic grains to original form and thereby improving corrosion resistance.

 

During annealing, scales are formed on the surface of the tubes. In order to remove these, the tubes are pickled by immersing into hot pickling solution made of nitric acid, sulphuric acid and hydrofluoric acid.

 

The tubes are then coated with proper lubricant and then cold drawn over a drew bench:

1) To vary the metallurgical structure and restore the properties to the parent material:

2) To achieve a tube having closer dimensional tolerances:

3) To achieve a tube having closer dimensional tolerances:

4) To produce tubing of smaller size and wall thickness.

5) To reorient the grain structure of weld portion with that of the parent material and

6) To remove/minimize the internal bead.

 

Drawing is followed by subsequent annealing and pickling to restore the properties of the entire tube to that of the parent material. The tubes are then passiated to impart extra corrosion resistance. Thereafter every tube is electrically marked with material grade, size and manufacturing standard.

 

Technical Notes:

Chemical composition & Mechanical Property

 

 

 

Chemical Composition of Material

  Material

Composition

201

202

304

316

430

C

≤0.15

≤0.15

≤0.08

≤0.08

≤0.12

Si

≤1.00

≤1.00

≤1.00

≤1.00

≤1.00

Mn

5.5-7.5

7.5-10

≤2.00

≤2.00

≤1.00

P

≤0.06

≤0.06

≤0.045

≤0.045

≤0.040

S

≤0.03

≤0.03

≤0.030

≤0.030

≤0.030

Cr

16-18

17-19

18-20

16-18

16-18

N

3.5-5.5

4-6

8-10.5

10-14

Mo

2.0-3.0

Mechanical Property

Material Item    

201

202

304

316

Tensile Strength

≥535

≥520

≥520

≥520

Yield Strength

≥245

≥205

≥205

≥205

Extension

≥30%

≥30%

≥35%

≥35%

Hardness (HV)

<253

<253

<200

<200

SMC's promise: 

As the word leading manufacturer and supplier, Shanghai Metal Corporation makes“Service,Management,Craftsmanship."  In our commitment to deliver world class service, SMC's Quality Control Department not only promise to provide the best quality products, excellent customer services,  fast and reliable deliveries, and reasonable prices; but also goes the extra step to provide environment conscious products that will improve lives.

Our Products:

Stainless Steel Welded Pipe



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