Welding Heat Exchanger Stainless Steel Piping 304 / 316L SS Tubes ASTM A249

Grade

Chemical Composition(%)

Remark

C≤

Mn≤

P≤

S≤

Si≤

Cr

Ni

Mo

N

Cu

304

0.08

2.00

0.045

0.030

0.75

18.0~20.0

8.0~10.50

0~0.1

304L

0.030

2.00

0.045

0.030

0.75

18.0~20.0

8.0~12.0

0~0.1

316

0.08

2.00

0.045

0.030

0.75

16.0~18.0

10.0~14.0

2.0~3.0

0~0.1

316L

0.030

2.00

0.045

0.030

0.75

16.0~18.0

10.0~14.0

2.0~3.0

0~0.1

SA249 Standard Specification For Welded Austenitic Steel Boiler,Superheater, Heat-Exchanger And Condenser Tubes.

Item

Contents

Requirements

1

Chemical Composition

Acc.to SA249 and SA480

2

Welding method

TIG Welding

3

Materail

TP304, TP304L, TP304H, TP310S, TP316, TP316L, TP316TI, TP316H, TP317L, TP321

4

Straightness

0.8mm/900mm

5

Tolerance

OD acc.to A1016/A1016M,WT +/-10%

6

Heat Treatment

Bright Annealing Temperature 1040℃

7

Mechanical Property

Mechanical Property:Enlongation 45%-65%

Expansion Test:Acc.To ASTM A249 & ASTM A1016

Flange Test: Acc.To ASTM A249 & ASTM  A1016

Flattening Test: Acc.To ASTM A249 & ASTM  A1016

Hardness:HRB 75-90

1.  Pipes for Liquid Delivery.

2.  Tubes for Power Industry(Thermal Power and Nuclear Power Staition)

and Petrochemical Industry:Boiler, Heat-sink, Condenser and Heat-exchanger tubes

3.  Tubes for Automotive Industry:Oil tube and Exaust System Tubes.

4.  Tubes for Medicine and Food Industry.

5.  Tubes for Mechanical and Construction.

Test items:

1.Chemical Composition(Spectral analysis )

2.Mechanical Property(Tensile Test Machine)

3.Expansion Test(Tensile Test Machine)

4.Flange Test(Tensile Test Machine)

5.Flattening Test(Tensile Test Machine)

6.  Hardness(sclerometer)

7. Metallo analysis(Metallo microscope)

8.Intergranular Corrosion Test

9.Surface and Dimension Test

10.Hydraulic Test(Hydraulic Test Machine)

11. Air Pressure Test (Air Pressure Test machine)

12.Eddy Current Test(Eddy Current Machine)