ML20238B668
| ML20238B668 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/21/1987 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20238A981 | List: |
| References | |
| T-210, NUDOCS 8708210367 | |
| Download: ML20238B668 (8) | |
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MANUFACTURERS OF SAFETYRELIEF VALVES
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ENGINEERING PROCEDURE p33g 1 g 3 TEST PROCEDURE T-210 REV. 2 l
l SAFET'l RELIEF VALVES I
I FOR HUCLEAR POWER PLANT SE
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MANUFACTUW S OF SAFETY RELIEF VAL VES T T-210 ENGINEERING PROCEDURE REVISION
SUMMARY
SHEET j
em 2 d 8
REV.
PAGE TREPAR12)
DESCRIPTION OF CHANGE BY CHKD.
APPR.
p BY BY.
0 All New Procedure, Eht3M F
j[g 1
4 D let fe ence to Code Paragraphs in 2.2 f(/
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Added Paragraph 2.4 Cap Pressure Test h*N1 All Renumbered pages.
h.
2 3
2.
TESTING:
-- Added "... to pressures
/he%A indicated on the gy partially filled
[
out test report."
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2.1. l{fDR0 STATIC TESTS:
Y Para.1. Added to beginning of third sentence "There shall be no...
W Deleted... shall not exceed three (3) drops per minute per inch of the valve inlet size.
Diis is equivalent to ten (10) co per hour per inch of the valve inlet size."
Added (+ 101. - 0 5)
(in three (3) places),
il 2 3. SEA T TIGHThTSS:
Para. 4.
(last sentence)
A dded "Unless otherwise speci fied... "
5 3
SEALING:
"JEL O0 " ch a nge d to "J EL ".
i 6
5.
DEFINI TIONS :
(very last line)
Deleted (very last line) -
"Por definition of other terms -
refer to ANSI-895 1."
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- 6. g TEST REPORTS Added "... by the test inspector... ".
Deleted reference to record maintenance.
7.
___ Deleted NAMEPLR@ hh I
07/21 6T 10: 42 E 215 677 1754 J E L O N E li G A N CO 04 Amr71y.
MANUFACTUllERS OF SAFETYRELIEF VALVE 3
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ENGINEERING PROCEDURE PAGE 3 of a TEST PROCEDURE FOR SAFETY RELIEF VALVES FOR NUCLEAR POWER PLANT SERVICE 1.
_S(DPE:
This procedure covers hydrostatic testing, set preesure testing, and seat i
leakage testing of safety relief valves for Nuolear Fower Plant Servios.1he valves shall be cleaned in aooordance with specified Cleaning and Packaging Procedure prior to the testing.
2e TESTTNG_t All the valves aball be subjected to hydrostatic ttst, set pressure test, and seat tightness test to pressures indicated on the partially filled out test report.
All the testing shall be performed prior to the prising, coating or
- painting, Analog type indicating gauges used in these tests, shall be graduated over a range not less than 1} times nor more than 4 times the test pressure.
Digi tal type pressure gauges may be used without range restriction, provided the oombined error, due to callbation and readability, does not exceed 15 of the test pressure or 0 5 pai (whichever is greater).
All pressure smuges are to be calibrated acoording to the schedule specified in the appropriate Quality
. Assurance Manual.
2.1.
HYDROSTATIC TESTS:
Assembled valves shall be hydrostatically tested on the inlet, with the valve sagged, at 15 times (+ 105, - 05) the set pressure for a period of ten (10) minutes.
Before gagging, the valve abould be caused to leak to insure release of any trapped air.
There shall be no seat leakage during i
hydrostatic test.
Water used for testig, shall be in acoordance with the specified Cleaning and Packaging Procedure.
Non-bellows valves shall be hydrostatitaally tested on the outlet side at a pressure equal to 1 5 times (+ 105, - 05) the outlet ruting (per
, ANSI B16.5), for a period of ten (10) minutes, to assure sound castings 1
and tight joints.
Bellows valves shall be hydrostatically tested on the outlet and the bonnet simultaneously, at 1.5 times 4105, - 05) the outlet rating, for a period of ten (10) minates, to assure sound castings and tight joints.
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m MANUFACTURERS OF SAFETY REllEF VALVES T-210 REV. 2 -
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ENGINEERING PROCEDURE Pas 4 or 8 -
2.1.
WDR0 STATIC TESTS:
(Continued)
After the hy6costatio test, the valve caps (for valves not provided with
)
a pg) or gag screws (for valves provided with a gas) shall be removed to allow drainage of the hydrostatic test medium.
De valve test operator shall replaos the cap or gag screw (whichever is applicable) prior to the 4
set pressure and the seat leakage test.
Following the hydrostatic test, each bellows valve shall be given an air pressure test on the outlet side to inspect the bellows and the gasketed joints for leakage.
De test pressure shall be 50 PSIO (+ 5 psi, 0).
The joints shall be j nspected using a bubble solution to verify there are no leaks.
2.2.
$8T PRESSURE TEST:
Safety Relief Valves for steam service shall be set and adjusted to the '
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specified set pressure usin6 steam as the test' medium.
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i Safety Relier Valves for gas or vapor service shall De set and adjusted to the specified set pressura, using air at ambient t6cperature as the test medium. _ Valves for serM oe temperatures in excess of 2500 F, J all be _ set at 3% higher on ambift).t._ air _._to_compensa te (pr the lecmperature.
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Relief Valves for liquid servios aball be set and adjusted to the 4
specified set pressure, using water at ambient temperature as the test medium.
The water used for testing, shall be !n aooordance with the specified Cleaning and Packing Procedure.
The toleiance on the set pressure sha'1 be within plus or minus 2 psig for set pressures of 70 psis and below, and plus or minus 3% for set pressures over 70 psig.
23 SEAT TIGHTNESS:
Immediately af ter the above tests, the valves nhall be tested for seat tightness as follows:
, Steam Va:es 41all be tested on steam by adjusting the pressure at the inlet to 905 cf,the set pressure or 5 xi below the set pressure, whichever/ is 1cuer.
Under this condition, there shall be no audible or visible leakage.
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Q MANUFACTURERS OF SAFETYRELIEF VALVES
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g_ggn pgy, y ENGINEERING PROCEDURE PAGE 5 of 8 23 SEAT TIGHTNESS:
(Continued)
Valves for saa or vapor service aball be tested in acoordance with API-STD-527, using air at ambient temperature as follows:
Adjust the pressure at the inlet to 905 of the oold differential test pressure (see definitions) except for the valves with cold differential test pressures of 50 psig or below, in which case adjust the inlet pressure to 5 psig below the oold differential test pressure and observe the sea t leakage.
Unless otherwise specified, the leakage rate in bubbles per minute, using a 5/16" 0.D. tube with.035" well with end out square and smooth and submerged la below the surface of the water, shall not exoeed the numbers ahown in Fig. 1, 23 SEAT TIGHTNESSi-Valves for liquid service shall be tested on water at ambinet tem-perature, by adjusting the pressure at the inlet to 905 of the set pressure or 5 psig below the set pressure, whichever is lower.
The leakage shall not exceed three (3) drops por minute per inch of the valve inlet size.
1his is equivalent to a leakage rate of ten (10) oc/hr. per inch of valve inlet size.
For valves smaller than one inch, the leakage shall not exceed three (3) drops per minute.
This is in i
accordance with MSS-SP 61.
The water used for testing shall be in accordance with the approved Cleaning and Packing Procedure.
2.4.
CAP PRESStmE TEStr After all other tests are successfully completed, valves with screwed or packed caps shall have the outlet pressurized with air to 50 psig with the final cap installed.
The cap and cap-to-bonnet joints shall be inspected using a bubble solution to verify there are no leaks.
3 sEALInci Following the acceptance of all the pressure tests, all the external adjust-ments shall be sealed, using stainless steel wire with lead seal.
The lapression in the lead, "JEL", identifies the J. E.1,onergan Company as the Organi,zation performing the adjustments and sealing the valve.
4.
Q,EA NI NO:
The valves shall be final cleaned, painted, inspected, and packaged in acoor-dance with the procedures approved for the applicable specification.
MANUFACTURERS OF SAFETY RELIEF VAL VES T-210 REV 2
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ENGINEERING PROCEDURE PAaB 6 of 8 5
DEFINITIONS:
SET PRESSURE is defined as the value of increasing inlet statio pressure, at which a pressure relief valve displays one of the operational characteristics defined as " opening pressure, "poppin6 pressure", or " start-to-discharge a
pressure, depending on the servioe or as designated by the applicable 03de a
or regulation.
It is one value of pressure stamped on the relief valve.
CDLD DIFFERENTI AL TEST PRESSURE is the inlet statio pressure at which a pressare relief valve is adjusted to open on the test stand.
'Ihis test pressure includes corrections for the service conditions of back pressure
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and/or temperature.
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6.
TEST REPORTS:
A test report for each valve (Form No. 65, attached) shall be completed by the test inspector and forvarded to the Qtality Assurance Department.
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T-21u REV. 2 Page 7 of 8-ISO
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SET PRESSURE PSl0 l
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MAXIMUM SEAT LEAKAGE RATE, BUBBLE PER MINUTE
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roRW NO,6S REV.8 T-210' REV, 2 Page 8 of 8 MANUFACTURERS OF SAFETY REllEF VALVES TEST REPORT LONERGAN TEST PROCEDURE No.
REVISION NQ l
LONERGAN S. O, NO,,____
ITEM NO,.
SPRING No,_
CUSTOMER
_,,,,, O R D E R No, SIZE MODEL SET PRESSURE
- gpkFpg, glF CE E
BACK FRESSURE CFM AIR O ~
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% OVER - PRESS, GPM WATER O
I JELCO SERIAL NO, CUSTOMER TAG No.
DURATION JELCO MASTER WORKING VALVE TEST DATE OF TEST IN S P, G AG E NO, GAGE No,
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HYDRO TEST PRESS - INLET HYDRO TEST I
PRESS - 0UTLET HYDRO TEST BONNET (BELLOWS)
AIR TEST BELLOWS SE AT TEST PRESSURE ALLOWABLE' SEAT LEAKAGE ACTUAL SEAT LEAKAGE TIME COLD DIFF TEST PRESSURE (ACTUAL )
ACTUAL RESEAT PRESS.
CAP TYPE CUST, INSP, SERVICE A. N,1, "0" RING NO, JELCO TESTER WARN RING NOTCHES DOWN DATE
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