!
GateValveComponent
GATEwhichOpenandClosefluidflowwithoutchangein
flowdirection
Handwheel
Yoke
Stem
Gland
Glandpacking(Seal)
Bonnet
Backseat
Body
083
WedDis
343
Seatring
Gate valve testing
and maintenance
1- Purpose of using Gate Valve on stream
Gate Valve is used to open and close the flow only. Not
commonly used in flow control with the following
components.
GateValveComponent
GATEwhichOpenandClosefluidflowwithoutchangein
flowdirection
Handwheel
Yoke
Stem
Gland
Glandpacking(Seal)
Bonnet
Backseat
Body
083
WedDis
343
Seatring
2- Operation (open-closed) of Gate Valve
3- The Hydrostatic Test for Gate Valve requires 3
parts, Shell, Seat, and Backseat
The hydro-testing according to API 598. The valve standard is
ASME B16.34
PressureTesting-GateValve
Pressure/HydrostaticTestperAPI598forGateValve
ASMEB16.34Standard;
1.BackseatTest
2.ShellTest
3.ClosureTests(SeatTests)-Bothside
Pressure
RatingClass
Valve
MaximumOperatingPressure(MOP)/
Standard
PressureRating
ANSI 300
B16.341 740
BODYWCBST
EM 13CR
FIG.NO
0312F-5
@100°FMOP~410
DISC
HF
SERIALNO.
OP
@800°FM
HF
SEAT
NameplateofAGateValve
Credit:ASME816.34,API598
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***Gate Valve – Hydrotest Backseat;
The Hydrostatic Backseat Test must be tested at a
pressure of not less than 1.1 times the Maximum
Operating Pressure by fully opening the valve and
releasing the gland of the gate valve to check for leaks
through the Backseat.
PressureTesting-GateValve
HydrostaticBackseatTestperAPI598forGateValveASMEB16.34
Standard;
Fullyopen,andthepackingglandlooseorpackingnotinstalled
BackseatTestPressure≥1.1xPressureRating(MOP)at38°C
Novisualevidenceofleakagethroughthebackseat
Gandlos
BACKSE
ATTEST
Detectleakagethrough
TheBackseat
FullyOpen
tredit.Aur363441338emadr.sos.com
***Gate Valve – Hydrotest Shell;
Hydrostatic Shell Test must be tested at a pressure not
less than 1.5 times the Maximum Operating Pressure
by opening the valve partially open and tightening the
gland to get the pressure. Then check for leaks through
Shell.
***Gate Valve – Hydrotest Seat;
Hydrostatic Closure Test or Seat Test, continue to test
from Shell Test at the pressure not less than 1.1 times of
Maximum Operating Pressure by closing the valve fully
closed and then checking the leak through Seat and
Disk. Both tests must be done on two (2) – Side of Gate
Valve.
***Valve – Pressure Test Duration;
Valve ‘s minimum hydrostatic/pneumatic pressure test,
according to the table in API 598, where the test duration
is the time we spend checking the valve leak after The
pressure can be maintained at Test pressure.
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One thought on “Gate valve
testing and maintenance”
Afzalmeraj
OCTOBER 23, 2022 AT 2:40 PM
Dear friends.
I inform you that I need specification and testing of
valves like Ball valves and Gate valve, butterfly valve etc.
Note: it’s urgent please.
! Liked by 1 person
REPLY
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