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Body pressure detection
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ANSI B 16.34 Section 7.1 |
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|
Valve size NPS |
Test pressure  |
Test time sce |
|
DN50¡à |
1:5 times the 100¡ãC F |
15second |
|
DN65-200 |
Rating of AN ST Class |
60second |
|
DN250¡à |
Max. operating pressure |
180second |
|
Detect pressure than the maximum working pressure  valve 1.5 times higher (100F) |
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1.Seal hydrostatic test:The pressure should be more 1.1 times than working pressare by seal hydrastatic test.
|
ANSI B 16.34 Section 7.2 |
||
|
Valve size NPS |
Test pressure  |
Test time sce |
|
DN50¡à |
1:5 times the 100¡ãC F |
15second |
|
DN65-200 |
Rating of AN ST Class |
30second |
|
DN250¡à |
Max. operating pressure |
60second |
|
Detect pressure than the maximum working pressure  valve 1.5 times higher (100F) |
||
2.Seal air test: Seal air leakage test is based on 80psig (6kgf/cm^ nin-actiue gas or full filled with air, after dose the valve, then check it is leakage or not by one side  of the valve.