ASTM D1598-23 pdf free download – Standard Test Method For Time-To-Failure Of Plastic Pipe Under Constant Internal Pressure.
This test method covers the determination of the time-to-failure of both thermoplastic and reinforced thermosetting/resin pipe under constant internal pressure.
This test method provides a method of characterizing plastics in the form of pipe under the conditions prescribed.
The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
5. Significance and Use
5.1 The data obtained by this test method are useful for establishing stress versus failure time relationships in a controlled environment from which the hydrostatic design basis for plastic pipe materials can be computed. (Refer to Test Method D2837 and Practice D2992.)
5.2 In order to determine how plastics will perform as pipe, it is necessary to establish the stress-failure time relationships for pipe over 2 or more logarithmic decades of time (hours) in a controlled environment. Because of the nature of the test and specimens employed, no single line can adequately represent the data, and therefore the confidence limits should be estab- lished.
NoTE 2- Some materials may exhibit a nonlinear relationship between log-stress and log-failure time, usually at short failure times. In such cases, the 10-hour stress value computed on the basis of short-term test data may be significantly different than the value obtained when a distribution of data points in accordance with Test Method D2837 is evaluated.However, these data may still be useful for quality control or other applications, provided correlation with long-term data has been established.
5.3 The factors that affect creep and long-term strength behavior of plastic pipe are not completely known at this time.
This procedure takes into account those factors that are known to have important influences and provides a tool for investigating others.
ASTM D1598-23 pdf free download – Standard Test Method For Time-To-Failure Of Plastic Pipe Under Constant Internal Pressure
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