Hydrotest-Procedure-Ball-Valve_1.pdf

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www.swivalve.comCopyright 2008 SWI Valve Co., Ltd. All rights reserved.

Ball ValveHydro Test

PROCEDURE MANUAL


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SPEC. NO. SW-P-25-02

ISSUED BY KH JUNG TEST PROCEDURE ISSUED D ATE 09/2006

TITLE APPROVED BY M.GILCHRIST

REVISION 00SWI VALVECO., LTD. A.P.I. 598 TESTING FOR SOFT SEATED

BALL VALVES SHEET 1 OF 4

1.0 PURPOSETo define the factory test requirements for SWI soft seated Ball valves. Standard testing compriseshydrostatic testing of the pressure envelope (body) and seat tightness testing (hydrostatic and/orpneumatic) as applicable.

2.0 RELEVANT STANDARDThe requirements set out in this standard are in accordance with the following National / InternationalStandards, BS6755 Pt.1, pr EN 12266 Pt.1, API 598. The hydrostatic test pressures expressed in thisstandard comply with British Standard BS1560 and ASME B16.5 for flanges and fittings and ASMEB16.34 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.

NPS ≤ 4” & ASME Class ≤ 1500NPS > 4” & ASME Class ≤ 600

NPS ≤ 4” & ASME Class > 1500NPS > 4” & ASME Class > 600Test Description

Floating Ball Trunnion Ball Floating Ball Trunnion Ball

Shell (Hydrostatic) Required Required Required Required

Seat (Hydrostatic) Optional (1) (2) Optional(1) (2) Optional (1)(2) 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 GeneralSurface treatments of pressure containing valve components to prevent corrosion during storage prior toand during manufacture with a single primer coat (maximum 25 microns thickness) or phosphatetreatment is acceptable provided these preservations do not hide any porosity.

4.2 Test Apparatus

Two and three piece bodied valves must not be tested on equipment which subjects the valve toexternally applied loads which may effect the body joint sealing performance. Single piece bodied valvesmay 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 maximumpermissible 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 nopermanent distortion under the full test pressure. No device shall be used in testing the valve that willreduce the stress in the body.

The valve shall be set in the partially open position for this test, and completely filled with test fluid. Anyentrapped 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.

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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 sealingsurface / closure interface shall be free from oil, grease and sealant. Depending on the valve design andsize a “varying settling in period” is allowed. There shall be no visible leakage during the test perioddefined 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 anyentrapped air should be vented from both ends and the body cavity via eithera) 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 eachside of the closed valve with the other side open to the atmosphere to check for leakage at theatmospheric side of the closure.

Trunnion Ball (double block & bleed)- The pressure shall be applied successively to each side of theclosed valve through the valve port. Any excess fluid in the body cavity should be allowed to drain. Theseat test shall be held for at least the minimum test duration. Check for leakage into the body cavity. Ifthe 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 berepeated 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 aminimum gauge pressure differential of 4 to 7 bar (60-100 psig). The seat sealing surface / closureinterface shall be free from oil, grease and sealant. Depending on the valve design and size a “varyingsettling in period” is allowed. The test shall be applied successively to each end of the valve. There shallbe 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 valvevent or drain plugs removed. One side of the valve should be brought to the air seat test pressure andheld for a least the minimum test duration.



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Floating Ball (other than a double block & bleed) - The pressure shall be applied successively to eachside of the closed valve with the other side open to the atmosphere to check for leakage at theatmospheric side of the closure.

NOTE: - Valves fitted with a vented ball for special service are unidirectional and shall only be tested inthe preferred flow direction.

Trunnion Ball (double block & bleed)-The pressure shall be applied successively to each side of theclosed valve through the valve port. Check for leakage into the body cavity by monitoring the body ventor drain connections using either a soap film solution or an inverted ‘U’ tube with its outlet submergedunder water. If the seat pressure is held successfully then the other seat shall be tested in the samemanner.

NOTE: Valves having no vent or drain connections should be checked for leakage on thedownstream end of the valve. It is important to vent down the cavity before each seat istested.

If unacceptable leakage is found, corrective action may be taken to eliminate the leakage and the seattest repeated. If the valve is disassembled to eliminate the leakage, all previous testing must berepeated upon re-assembly.

5.0 TEST LIQUID

5.1 Test LiquidHydrostatic 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 themanufacturer. If water is used, it will contain water-soluble oil or rust Inhibitor. Potable water used forpressure test of austenitic stainless steel valves shall have a chloride content less than 30ppm and forcarbon 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 withdemineralized 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 avisual inspection for dryness. If moisture is still found, the above process shall be repeated until visuallydry.

6.0 TEST GAUGES Test bay gauges shall be calibrated at intervals not exceeding six months.

7.0 TEST CERTIFICATION When specified by the Purchaser, the manufacturer shall issue a BS EN10204 Type 3.1 test certificateconfirming that the valves have been tested in accordance with the requirements of this specification.



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TABLE 1 – TEST PRESSURE (ASME B 16.34 & BS5351 for Class 800 Valves)

Class 150# 300#

CWP Shell Seat CWP Shell SeatDescription

Material psig Kg/cm2 Kg/cm2 psig Kg/cm2 Kg/cm2

A105, A350-LF2 285 32 23 740 80 59

A182-F5,F9,F11,F22 290 32 23 750 80 59

A182-F304,F316 275 30 23 720 78 57

A182-F304L, F316L 230 25 20 600 64 48

Class 600# 800#



A105, A350-LF2 1480 157 117 1975 210 153

A182-F5,F9,F11,F22 1500 159 117 2000 211 155

A182-F304,F316 1440 153 113 1920 204 150

A182-F304L, F316L 1200 127 94 1600 169 125

Class 1500# 2500#



A105, A350-LF2 3705 392 289 6170 653 478

A182-F5,F9,F11,F22 3750 396 291 6250 660 484

A182-F304,F316 3600 380 280 6000 633 465

A182-F304L, F316L 3000 317 233 5000 528 387

TABLE 2 – TEST DURATION

MINIMUM TEST DURATIONS (Seconds)NOMINAL SIZE(NPS) Hydro Shell Test Hydro Seat Test Air Seat Test

≤ 2” 15 15 15

2 ½” – 6” 60 60 60

8” – 12” 120 120 120

≥ 14” 300 120 120


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