Equipment Failure Rates: Pipe
H25-111 to H25-450A
Equipment failure rates, MTBF, MTTR, and downtime statistics for electrical and mechanical plant equipment. Primary data from the USACE PREP reliability database (IEEE Std 3006.8-2018 Table 2), covering ~280 equipment classes. Supplemental data from IEEE motor and transformer surveys.
| equipment type | class code | description | failure rate per year (failures/year) | failures (count) | mdt hours (h) | mtbf hours (h) | mttm hours (h) | mttr hours (h) | standard | survey | unit years (unit-years) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe | H25-111 | Pipe, flex, reinforced, < | 0.010958 | 3 | 8 | 799,440 | — | 8 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 273.8 |
| Pipe | H25-112 | Pipe, flex, non-reinforced, > | 0.014544 | 3 | 3.6 | 602,290 | 4 | 3.33 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 206.3 |
| Pipe | H25-122 | Pipe, flex, reinforced, > | 0.002988 | 4 | 2.25 | 2,931,848 | — | 2.25 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 1,338.7 |
| Pipe | H25-310 | Pipe, refrigerant, < 25 mm per | 0.000379 | 3 | 2.11 | 23,107,704 | 2 | 10.67 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 7,913.6 |
| Pipe | H25-320 | Pipe, refrigerant, 25 mm to 80 | 0.000907 | 3 | 8.73 | 9,657,520 | 8.78 | 8 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 3,307.4 |
| Pipe | H25-410A | Pipe, water, ≤ 50 mm per 30.5 | 0.001499 | 0 | — | 7,943,294 | — | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 462.5 |
| Pipe | H25-420 | Pipe, water, 50 mm to 100 mm | 0.02053 | 6 | 14.08 | 426,692 | — | 14.08 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 292.3 |
| Pipe | H25-430A | Pipe, water, 100 mm to 200 | 0.00258 | 0 | — | 4,614,729 | — | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 268.7 |
| Pipe | H25-440A | Pipe, water, 200 mm to 300 | 0.00085 | 0 | 8 | 14,008,612 | 8 | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 815.6 |
| Pipe | H25-450A | Pipe, water, > 300 mm per 30.5 | 0.084984 | 0 | — | 140,094 | — | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 8.2 |
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