Central Steel
Central Steel
Central Steel
The ASTM A192 specification specifies minimum wall thickness standards for seamless carbon steel tubes for high pressure boilers and superheaters, which are ideal for use in high, medium and low pressure environments.
Outside diameter tolerance
|
Production Method |
Diameter Range (mm) |
Tolerance (mm) |
|
Hot Rolled |
OD ≤ 101.6 |
-0.5 |
|
|
101.6 < OD ≤ 177.8 |
-0.33 |
|
Cold Drawn |
OD < 25.4 |
±0.10 |
|
|
25.4 ≤ OD ≤ 38.1 |
±0.15 |
|
|
38.1 < OD < 50.8 |
±0.20 |
|
|
50.8 ≤ OD < 63.5 |
±0.25 |
|
|
63.5 ≤ OD < 76.2 |
±0.30 |
|
|
76.2 ≤ OD ≤ 101.6 |
±0.38 |
|
|
101.6 < OD ≤ 177.8 |
-0.59 |
Wall thickness tolerance
|
Production Method |
OD Range (mm) |
WT Range (mm) |
Tolerance (%) |
|
Hot Rolled |
OD ≤ 101.6 |
WT ≤ 2.4 |
+40 / -0 |
|
|
|
2.4 < WT ≤ 3.8 |
+35 / -0 |
|
|
|
3.8 < WT ≤ 4.6 |
+33 / -0 |
|
|
|
WT > 4.6 |
+28 / -0 |
|
|
OD > 101.6 |
2.4 < WT ≤ 3.8 |
+35 / -0 |
|
|
|
3.8 < WT ≤ 4.6 |
+33 / -0 |
|
|
|
WT > 4.6 |
+28 / -0 |
|
Cold Drawn |
OD ≤ 38.1 |
|
+20 / -0 |
|
|
OD > 38.1 |
|
+22 / -0 |
Test requirement
Mechanical property test
Flattening test
Flaring test
Flanging test
Hardness test
Hydraulic or non-destructive electrical testing: To ensure the integrity of the pipe under pressure.
Application field
ASTM A192 piping is mainly used for:
High pressure boiler
Superheater system
Power plant heat exchanger
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