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Table 1

Failure probability of pipes in a period of 1 month

PipeLengthλijPij(t)a
1–2 1.0 0.169014 0.014085 
1–3 0.5 0.084507 0.007042 
1–5 1.5 0.253521 0.021127 
2–4 0.75 0.126761 0.010563 
2–5 2.5 0.422535 0.035211 
3–4 2.0 0.338028 0.028169 
4–5 1.75 0.295775 0.024648 
5–6 2.5 0.422535 0.035211 
6–7 2.0 0.338028 0.028169 
6–8 0.5 0.084507 0.007042 
7–8 0.75 0.126761 0.010563 
8–9 0.5 0.084507 0.007042 
9–10 1.5 0.253521 0.021127 
PipeLengthλijPij(t)a
1–2 1.0 0.169014 0.014085 
1–3 0.5 0.084507 0.007042 
1–5 1.5 0.253521 0.021127 
2–4 0.75 0.126761 0.010563 
2–5 2.5 0.422535 0.035211 
3–4 2.0 0.338028 0.028169 
4–5 1.75 0.295775 0.024648 
5–6 2.5 0.422535 0.035211 
6–7 2.0 0.338028 0.028169 
6–8 0.5 0.084507 0.007042 
7–8 0.75 0.126761 0.010563 
8–9 0.5 0.084507 0.007042 
9–10 1.5 0.253521 0.021127 

at = 1 month.

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