The purpose of ISO standard 5208: Industrial valves - Pressure testing of metallic valves, is the establishment of basic requirements and practices for pressure testing valves of various configurations that are used in general purpose, power generation, petroleum, and petrochemical or allied industry applications. The intent is to provide a consistent set of procedural requirements and acceptance criteria that can be considered in conjunction with valve specific standards appropriate for specific applications. Account has been taken of the valve testing requirement needs of EN 12266 and API 598 with requirements referenced for PN designated valves for the former and Class designated valves for the latter.
Prescribed pressure tests |
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TEST | DN |
PN OR CLASS |
GLOBE VALVE |
SHELL TEST LIQUID |
ALL | ALL | REQ |
SHELL TEST GAS |
ALL | ALL | OPT |
BACK SEAT TEST (B, C) LIQUID |
ALL | ALL | OPT |
CLOSURE TEST GAS LOW-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
OPT |
CLASS > 1500 AND PN > 250 |
OPT | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
OPT | |
CLASS > 600 AND PN > 100 |
OPT | ||
CLOSURE TEST LIQUID HIGH-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
REQ |
CLASS > 1500 AND PN > 250 |
REQ | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
REQ | |
CLASS > 600 AND PN > 100 |
REQ | ||
Prescribed pressure tests |
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TEST | DN |
PN OR CLASS |
PLUG VALVE (A) |
SHELL TEST LIQUID |
ALL | ALL | REQ |
SHELL TEST GAS |
ALL | ALL | OPT |
BACK SEAT TEST (B, C) LIQUID |
ALL | ALL |
NOT REQ |
CLOSURE TEST GAS LOW-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
REQ |
CLASS > 1500 AND PN > 250 |
OPT | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
OPT | |
CLASS > 600 AND PN > 100 |
OPT | ||
CLOSURE TEST LIQUID HIGH-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
OPT |
CLASS > 1500 AND PN > 250 |
REQ | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
OPT | |
CLASS > 600 AND PN > 100 |
REQ | ||
Prescribed pressure tests |
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TEST | DN |
PN OR CLASS |
CHECK VALVE |
SHELL TEST LIQUID |
ALL | ALL | REQ |
SHELL TEST GAS |
ALL | ALL | OPT |
BACK SEAT TEST (B, C) LIQUID |
ALL | ALL |
NOT REQ |
CLOSURE TEST GAS LOW-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
OPT |
CLASS > 1500 AND PN > 250 |
OPT | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
OPT | |
CLASS > 600 AND PN > 100 |
OPT | ||
CLOSURE TEST LIQUID HIGH-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
REQ |
CLASS > 1500 AND PN > 250 |
REQ | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
REQ | |
CLASS > 600 AND PN > 100 |
REQ | ||
Prescribed pressure tests |
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TEST | DN |
PN OR CLASS |
FLOATING BALL OR DIAPHRAGM VALVE |
SHELL TEST LIQUID |
ALL | ALL | REQ |
SHELL TEST GAS |
ALL | ALL | OPT |
BACK SEAT TEST (B, C) LIQUID |
ALL | ALL |
NOT REQ |
CLOSURE TEST GAS LOW-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
REQ |
CLASS > 1500 AND PN > 250 |
REQ | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
REQ | |
CLASS > 600 AND PN > 100 |
REQ | ||
CLOSURE TEST LIQUID HIGH-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
OPT |
CLASS > 1500 AND PN > 250 |
OPT | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
OPT | |
CLASS > 600 AND PN > 100 |
OPT |
Prescribed pressure tests |
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TEST | DN |
PN OR CLASS |
BUTTERFLY OR TRUNNION MOUNTED BALL VALVE |
SHELL TEST LIQUID |
ALL | ALL | REQ |
SHELL TEST GAS |
ALL | ALL | OPT |
BACK SEAT TEST (B, C) LIQUID |
ALL | ALL |
NOT REQ |
CLOSURE TEST GAS LOW-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
REQ |
CLASS > 1500 AND PN > 250 |
OPT | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
REQ | |
CLASS > 600 AND PN > 100 |
OPT | ||
CLOSURE TEST LIQUID HIGH-PRESSURE |
DN ≤ 100 |
CLASS ≤ 1500 AND PN ≤ 250 |
OPT |
CLASS > 1500 AND PN > 250 |
REQ | ||
DN > 100 |
CLASS ≤ 600 AND PN ≤ 100 |
OPT | |
CLASS > 600 AND PN > 100 |
REQ |
Notes:
Maximum allowable closure test leakage rate |
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TEST FLUID |
UNIT LEAKAGE RATES |
RATE A |
RATE AA |
LIQUID | MM3/S | (1) |
0.006 X DN |
DROPS/S |
0.0001 X DN |
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GAS | MM3/S | (1) |
0.18 X DN |
BUBBLES/S |
0.003 X DN |
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Maximum allowable closure test leakage rate |
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TEST FLUID |
UNIT LEAKAGE RATES |
RATE B |
RATE C |
LIQUID | MM3/S |
0.01 X DN |
0.03 X DN |
DROPS/S |
0.00016 X DN |
0.0005 X DN |
|
GAS | MM3/S |
0.3 X DN |
3 X DN |
BUBBLES/S |
0.0046 X DN |
0.0458 X DN |
|
Maximum allowable closure test leakage rate |
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TEST FLUID |
UNIT LEAKAGE RATES |
RATE CC |
RATE D |
LIQUID | MM3/S |
0.08 X DN |
0.1 X DN |
DROPS/S |
0.0013 X DN |
0.0016 X DN |
|
GAS | MM3/S |
22.3 X DN |
30 X DN |
BUBBLES/S |
0.3407 X DN |
0.4584 X DN |
|
Maximum allowable closure test leakage rate |
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TEST FLUID |
UNIT LEAKAGE RATES |
RATE E |
RATE EE |
LIQUID | MM3/S |
0.3 X DN |
0.39 X DN |
DROPS/S |
0.0048 X DN |
0.0062 X DN |
|
GAS | MM3/S |
300 X DN |
470 X DN |
BUBBLES/S |
4.5837 X DN |
7.1293 X DN |
|
Maximum allowable closure test leakage rate |
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TEST FLUID |
UNIT LEAKAGE RATES |
RATE F |
RATE G |
LIQUID | MM3/S |
1 X DN |
2 X DN |
DROPS/S |
0.016 X DN |
0.032 X DN |
|
GAS | MM3/S |
3000 X DN |
6000 X DN |
BUBBLES/S |
45.837 X DN |
91.673 X DN |
|
Maximum allowable closure test leakage rate |
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TEST FLUID |
UNIT LEAKAGE RATES |
RATE F |
RATE G |
LIQUID | MM3/S |
1 X DN |
2 X DN |
DROPS/S |
0.016 X DN |
0.032 X DN |
|
GAS | MM3/S |
3000 X DN |
6000 X DN |
BUBBLES/S |
45.837 X DN |
91.673 X DN |
Notes:
(1) No visually detectable leakage for the duration of the test
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