P/N 330654-E 01/2018 COPYRIGHT © Dansensor A/S
42 User Guide EN Lippke 4000/4500
Creep test
A Creep test can be used to evaluate the seals on a package. A Creep test inflates the package to a
specific pressure (typically app. 80% of the burst pressure) and maintains this pressure for a specified
time period. The package passes the test if it does not burst during the test. The Creep test complies with
ASTM F1140.
CAUTION! It is possible that the package will burst during a Creep test. Please note that the
pressure may not drop to a low level immediately after the test.
NOTE! When testing filled packages, precautions may be necessary to ensure that the
product does not contaminate the operator or the system. Depending on the package
contents, the use of safety glasses may be advisable. A protective hood placed over the
package may offer additional protection.
A Creep test is divided into 2 phases:
The package is inflated to the test pressure.
The test pressure is maintained for a fixed period of time.
The results from the Creep test are:
• PASS - if the package does not burst
•FAIL - if the package bursts
CAUTION! If the package did not burst, it is still under pressure! Remove the package
carefully; a sudden pressure drop will occur when it is removed.
Pressure
Time
Test pressure
= Inflating to test pressure
= Testing
[mbar]
[sec]
1
12
2
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