3.0 2.5 2.0 1.5 1.0 A2 MPa 0.5 2.8 MPa 14 MPa/ 102 10° 10 10 105 10° 107 10° Time (seconds) Strain (%) 14 MPa 12.6 MPa 11.2 MPa 98 MPa 8.4 MPa MPa 5.6 MPa

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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For safe and reliable operation, a certain polypropylene pipe must withstand an internal pressure of
0.5 MPa for a minimum of three years. If the pipe diameter
is 100 mm, what is the minimum necessary wall thickness to
ensure that the pipe will not experience a strain greater than
1.3%? To solve this problem, use the accompanying graph that reveals the room temperature creep response for polypropylene.

3.0
2.5
2.0
1.5
1.0
A2 MPa
0.5
2.8 MPa
14 MPa/
102
10°
10
10 105 10° 107 10°
Time (seconds)
Strain (%)
14 MPa
12.6 MPa
11.2 MPa
98 MPa
8.4 MPa
MPa
5.6 MPa
Transcribed Image Text:3.0 2.5 2.0 1.5 1.0 A2 MPa 0.5 2.8 MPa 14 MPa/ 102 10° 10 10 105 10° 107 10° Time (seconds) Strain (%) 14 MPa 12.6 MPa 11.2 MPa 98 MPa 8.4 MPa MPa 5.6 MPa
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