APV SLP, Инструкция по установке, эксплуатации и обслуживанию

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Australian Pipeline Valve - Installation, Operation and Maintenance Manual 13
WAFER PATTERN CHECK VALVES - ‘SLP’ & ‘SW’ STYLE
TABLE 1
Wafer Check Valve Standard APV Allowable Leakage Rates for Closure (Seat) Tests API 598
VALVE SIZE METAL SEATED WAFER CHECK VALVES SOFT SEATED WAFER CHECK VALVES
NB NPS
LIQUID TEST (cc/min) GAS TEST (bubbles/min) LIQUID TEST (cc/min) GAS TEST
a
(bubbles/min)
APV API 598 API 598 APV API 598 APV
a
API 598
≤50 ≤2 3 6 Not required per API598
d
0
c
Not specified
c
2
b
Not required per API598
d
65 2.5 3.75 7.5 Not required per API598
d
0
c
Not specified
c
2
b
Not required per API598
d
80 3 4.0 9 Not required per API598
d
0
c
Not specified
c
2
b
Not required per API598
d
100 4 6.0 12 Not required per API598
d
0
c
Not specified
c
2
b
Not required per API598
d
125 5 7.5 15 Not required per API598
d
0
c
Not specified
c
2
b
Not required per API598
d
150 6 9.0 18 Not required per API598
d
0
c
Not specified
c
2
b
Not required per API598
d
200 8 12.0 24 Not required per API598
d
0
c
Not specified
c
2
b
Not required per API598
d
250 10 15.0 30 Not required per API598
d
0
c
Not specified
c
3
b
Not required per API598
d
300 12 18.0 36 Not required per API598
d
0
c
Not specified
c
3
b
Not required per API598
d
350 14 21.0 42 Not required per API598
d
0
c
Not specified
c
4
b
Not required per API598
d
400 16 24.0 48 Not required per API598
d
0
c
Not specified
c
4
b
Not required per API598
d
450 18 27.0 54 Not required per API598
d
0
c
Not specified
c
5
b
Not required per API598
d
500 20 30.0 60 Not required per API598
d
0
c
Not specified
c
6
b
Not required per API598
d
600 24 36.0 72 Not required per API598
d
0
c
Not specified
c
7
b
Not required per API598
d
a
Gas test not performed as standard on cast iron body valves and is not required as per API 598. API598 does not require gas test on steel valves but
APV performs it
b
5.5 bar minimum test pressure. (Higher test pressure may be required to energise resilient seat in high pressure classes/larger sizes).
c
Since API 598 does not specify a leakage rate for resilient seated check valves, many manufacturers use the metal seated check valve leakage rate.
However, APV demands as close as possible to tight shut off as per API 598 resilient seated (ISO 5208-A) Note in higher classes in smaller sizes and
all classes in larger sizes, 3 up to 10 water drips a minute is accepted.
d
For check valves, gas test is not required as per API 598, but APV does perform it.
1cc = 16 drops, 1ml = 16 drops