A249 Standard specification for welded austenitic steel boiler,superheater, heat-exchanger and condenser tubes.

Item

Contents

Requirements

1

Materail

TP304, TP304L, TP304H, TP310S, TP316, TP316L, TP316Ti, TP316H, TP317L, TP321

2

Welding Method

TIG

3

Chemical Composition

Acc.to A249 and A480

4

Heat Treatment

Bright Annealing temperature 1040

5

Straightness

0.8mm/900mm

6

Tolerance

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

7

Mechanical Property

Tension Test, Flattening Test, Flange Test, Reverse-Bend Test, Hardness Test, Hydrostatic or Other Nondestructive Test, Grain Size, Reverse-Bend Test, Hardness Test

8

Intergranular Corrosion

Acc.to the Buyer's Requirements

Description

Stainless Steel Welded Tubes

Grade

TP304

Contract No.

WXKSST-X14-11025

P.O NO.:

/

Condition

ASTM  A249

N

O

Heat No.

SIZE

(mm)

Quantity

CHEMICAL  ANALYSIS. (WT . %)

Elements

C

Si

Mn

P

S

Ni

Specification

≤0.080

≤0.75

≤2.00

≤0.040

≤0.030

8.0~11.0

1

S618965

Φ25.4×1.65×6100

5300pcs

Results

0.047

0.39

1.07

0.037

0.010

8.09

2

S648980

Φ25.4×1.65×8300

1500pcs

Results

0.043

0.52

1.07

0.028

0.008

8.02

3

Blank below

4

5

N

O

Hydrostatic

Test

100%

Flang test

Flattening test

Enlarging test

Reverse bend test

1

OK

OK

OK

OK

OK