PROCEDURE MANUAL
Ball Valve Hydro Test
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TEST PROCEDURE TITLE
SWI VALVE CO., LTD.
A.P.I. 598 TESTING FOR SOFT SEATED BALL VALVES
SPEC. NO.
SW-P-25-02
ISSUED BY
KH JUNG
ISSUED DATE
09/2006
APPROVED BY
M.GILCHRIST
REVISION
00
SHEET
1
OF
4
1.0
PURPOSE To define the factory test requirements for SWI soft seated Ball valves. Standard testing comprises hydrostatic testing of the pressure envelope (body) and seat tightness testing (hydrostatic and/or pneumatic) as applicable.
2.0
RELEVANT STANDARD The requirements set out in this standard are in accordance with the following National / International Standards, BS6755 Pt.1, pr EN 12266 Pt.1, API 598. The hydrostatic test pressures expressed in this standard comply with British Standard BS1560 and ASME B16.5 for flanges and fittings and ASME B16.34 for valves and BS5351 for Class 800 valves.
3.0
SCOPE This specification applies to Soft Seated (Floating & Trunnion Mounted) Ball Valves tested according to API 598 Table 1A & 1B as described below.
Test Description
NPS ≤ 4” & ASME Class ≤ 1500 NPS > 4” & ASME Class ≤ 600 Floating Ball Trunnion Ball
NPS ≤ 4” & ASME Class > 1500 NPS > 4” & ASME Class > 600 Floating Ball Trunnion Ball
Shell (Hydrostatic) Seat (Hydrostatic)
Required Optional (1) (2)
Required Optional (1)(2)
Required Optional(1) (2)
Required Required
Seat (Air) Required Required Required Optional (1) (1) When an optional test is specified by the purchaser, the test shall be performed in addition to the required tests. (2) A high pressure closure test is required for all valves specified to be double block & bleed valves.
4.0
TEST REQUIREMENTS
4.1
General Surface treatments of pressure containing valve components to prevent corrosion during storage prior to and during manufacture with a single primer coat (maximum 25 microns thickness) or phosphate treatment is acceptable provided these preservations do not hide any porosity.
4.2
Test Apparat us Two and three piece bodied valves must not be tested on equipment which subjects the valve to externally applied loads which may effect the body joint sealing performance. Single piece bodied valves may be clamped.
4.3
Shell Test (Hydrostatic) Every valve shall be subjected to a hydrostatic test of the body shell at 1.5 times the maximum permissible working pressure at 100 F (38 C), see Table 1. The body should remain tight for the test duration given in Table 2. The test shall show no leakage, no wetting of the external surfaces, and no permanent distortion under the full test pressure. No device shall be used in testing the valve that will reduce the stress in the body. °
°
The valve shall be set in the partially open position for this test, and completely filled with test fluid. Any entrapped air should be vented from both ends and the body cavity via either a) The upper test flange with the valve axis vertical. b) The body vent connection with the valve axis horizontal. After venting the body, vent plugs should be replaced.
C:\Documents and Settings\xp\My Documents\SWI Valve Co., Ltd\Test Procedures\SW-P-25-02.doc
TEST PROCEDURE TITLE
SWI VALVE CO., LTD.
A.P.I. 598 TESTING FOR SOFT SEATED
SPEC. NO.
SW-P-25-02
ISSUED BY
KH JUNG
ISSUED DATE
09/2006
APPROVED BY
M.GILCHRIST
REVISION
00
BALL VALVES
SHEET
2
OF
4
The gland and any body jointing shall be deemed as part of the pressure envelope. The valve shall then be brought to the required test pressure. All external surfaces should be dried and the pressure held for at least the minimum test duration. There shall be no visible leakage during the test duration specified in Table 2. If leakage is found, corrective action may be taken to eliminate the leakage and the test repeated. 4.4
Seat Test (Hydrostatic) When applicable or specified by purchaser, every valve shall be subjected to a hydrostatic seat test to 1.1 times the maximum permissible working pressure at 100 F (38 C), see Table 1. The seat sealing surface / closure interface shall be free from oil, grease and sealant. Depending on the valve design and size a “varying settling in period” is allowed. There shall be no visible leakage during the test period defined in Table 2. °
°
NOTE: This test must not be carried out on Class 300 Floating Ball Valves larger than 6” Full Bore / 8” Reduced Bore. With the valve in the partially open position, the cavity shall be completely filled with test fluid and any entrapped air should be vented from both ends and the body cavity via either a) The upper test flange with the valve axis vertical. b) The body vent connection with the valve axis horizontal. The valve should be closed and the body cavity vent (where fitted) shall remain open. Floating Ball (other than a double block & bleed) - The pressure shall be applied successively to each side of the closed valve with the other side open to the atmosphere to check for leakage at the atmospheric side of the closure. Trunnion Ball (double block & bleed)- The pressure shall be applied successively to each side of the closed valve through the valve port. Any excess fluid in the body cavity should be allowed to drain. The seat test shall be held for at least the minimum test duration. Check for leakage into the body cavity. If the seat pressure is held successfully, then the other seat shall be tested in the same manner. If unacceptable leakage is found, corrective action may be taken to eliminate the leakage and the seat test repeated. If the valve is disassembled to eliminate the leakage, all previous testing must be repeated upon re-assembly. 4.5
Seat Test (Air) When applicable or specified by purchaser, every valve shall be subjected to an air seat test at a minimum gauge pressure differential of 4 to 7 bar (60-100 psig). The seat sealing surface / closure interface shall be free from oil, grease and sealant. Depending on the valve design and size a “varying settling in period” is allowed. The test shall be applied successively to each end of the valve. There shall be no visible leakage for the test duration specified in Table 2. The valve should be moved to the half open position and any test fluid drained via either: a) The lower test flange with the valve axis vertical. b) The body drain connection with the valve axis horizontal. The valve should then be moved to the closed position and (where applicable) either one of the valve vent or drain plugs removed. One side of the valve should be brought to the air seat test pressure and held for a least the minimum test duration.
C:\Documents and Settings\xp\My Documents\SWI Valve Co., Ltd\Test Procedures\SW-P-25-02.doc
TEST PROCEDURE TITLE
SWI VALVE CO., LTD.
A.P.I. 598 TESTING FOR SOFT SEATED BALL VALVES
SPEC. NO.
SW-P-25-02
ISSUED BY
KH JUNG
ISSUED DATE
09/2006
APPROVED BY
M.GILCHRIST
REVISION
00
SHEET
3
OF
4
Floating Ball (other than a double block & bleed) - The pressure shall be applied successively to each side of the closed valve with the other side open to the atmosphere to check for leakage at the atmospheric side of the closure. NOTE: - Valves fitted with a vented ball for special service are unidirectional and shall only be tested in the preferred flow direction. Trunnion Ball (double block & bleed)-The pressure shall be applied successively to each side of the closed valve through the valve port. Check for leakage into the body cavity by monitoring the body vent or drain connections using either a soap film solution or an inverted ‘U’ tube with its outlet submerged under water. If the seat pressure is held successfully then the other seat shall be tested in the same manner. NOTE:
Valves having no vent or drain connections should be checked for leakage on the downstream end of the valve. It is important to vent down the cavity before each seat is tested.
If unacceptable leakage is found, corrective action may be taken to eliminate the leakage and the seat test repeated. If the valve is disassembled to eliminate the leakage, all previous testing must be repeated upon re-assembly.
5.0
TEST LIQUI D
5.1
Test Liquid Hydrostatic tests shall be carried out with water at ambient temperatures, within the range of 41°F (5°C) and 122°F (50°C), unless the use of another liquid is agreed between the purchaser and the manufacturer. If water is used, it will contain water-soluble oil or rust Inhibitor. Potable water used for pressure test of austenitic stainless steel valves shall have a chloride content less than 30ppm and for carbon steel valves shall be less than 200ppm.
5.2
Cleaning Austenitic and duplex stainless steel valves and valves made of 9% nickel alloy, shall be flushed with demineralized water (chloride content of 1ppm maximum) immediately after the hydrostatic test.
5.3
Drying After Hydrostatic testing, the valves should be blown through using dry compressed air, followed by a visual inspection for dryness. If moisture is still found, the above process shall be repeated until visually dry.
6.0
TEST GAUGES Test bay gauges shall be calibrated at intervals not exceeding six months.
7.0
TEST CERTIFICA TION When specified by the Purchaser, the manufacturer shall issue a BS EN10204 Type 3.1 test certificate confirming that the valves have been tested in accordance with the requirements of this specification.
C:\Documents and Settings\xp\My Documents\SWI Valve Co., Ltd\Test Procedures\SW-P-25-02.doc
TEST PROCEDURE TITLE A.P.I. 598 TESTING FOR SOFT SEATED
SWI VALVE CO., LTD.
SPEC. NO.
SW-P-25-02
ISSUED BY
KH JUNG
ISSUED DATE
09/2006
APPROVED BY
M.GILCHRIST
REVISION
00
BALL VALVES
SHEET
4
OF
4
TABLE 1 – TEST PRESSUR E (ASME B 16.34 & BS5 351 for Class 800 Valves) Class
150#
Description
300#
CWP
Shell
Seat
CWP
Shell
Seat
psig
Kg/cm2
Kg/cm2
psig
Kg/cm2
Kg/cm2
Material
A105, A350-LF2
285
A182-F5,F9,F11,F22
290
A182-F304,F316
275
A182-F304L, F316L
230
Class
32
23
32
740
23
30
750
23
25
20
720
59
80
59
78
600
57
64
600#
Description
80
48
800#
CWP
Shell
Seat
CWP
Shell
Seat
psig
Kg/cm2
Kg/cm2
psig
Kg/cm2
Kg/cm2
Material
A105, A350-LF2
1480
157
117
1975
210
153
A182-F5,F9,F11,F22
1500
159
117
2000
211
155
A182-F304,F316
1440
A182-F304L, F316L
1200
Class
153
113
127
1920
94
1600
1500#
Description Material
204
150
169
125
2500#
CWP
Shell
Seat
CWP
Shell
Seat
psig
Kg/cm2
Kg/cm2
psig
Kg/cm2
Kg/cm2
A105, A350-LF2
3705
392
289
6170
653
478
A182-F5,F9,F11,F22
3750
396
291
6250
660
484
A182-F304,F316
3600
A182-F304L, F316L
3000
380 317
280 233
6000 5000
633 528
TABLE 2 – TEST DURATION NOMINAL SIZE (NPS) 2” 2 ½” – 6” 8” – 12” ≥ 14” ≤
MIN IMUM TEST DURATIONS (Seconds) Hydro Shell Test Hydro Seat Test Air Seat Test 15 15 15 60 60 60 120 120 120 300 120 120
C:\Documents and Settings\xp\My Documents\SWI Valve Co., Ltd\Test Procedures\SW-P-25-02.doc
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