valve and packing development testingleak rate (mbar l/s) stress (mpa) ni-cr wire mesh reinforced...
TRANSCRIPT
José C. VeigaLuiz Paulo C. V. Romano
Gustavo M. SilvaTeadit Industria e Comercio
Rio de Janeiro, Brasil
Carlos D. GirãoTeadit Packing & Gasket
Vadodara, India
VALVE AND PACKING DEVELOPMENT TESTING
Agenda
1. Introduction
2. Minimum Seating Stress
3. Packing Drag and Force Transmission
4. Thermal Expansion
5. Corrosion Test
6. Fugitive Emission Test Rigs
7. Conclusions
Sealing for a Safer and Greener Tomorrow
Introduction
Low Emission Packing Design
Testing Devices: Simulate actual field conditions
Parameters that influence performanceSeating Stress
Number of Packing Rings
Stem x Packing Friction
Thermal Expansion and Contraction
Sealing for a Safer and Greener Tomorrow
Packing Minimum Seating StressSealing for a Safer and Greener Tomorrow
1,00E-06
1,00E-05
1,00E-04
1,00E-03
1,00E-02
1,00E-01
1,00E+00
0 5 10 15 20 25 30 35 40 45 50 55 60
Leak
Rat
e (m
bar l
/s)
Stress (MPa)
Expanded PTFE filled with Barium Sulphate Packing
1,00E-06
1,00E-05
1,00E-04
1,00E-03
1,00E-02
1,00E-01
1,00E+00
0 5 10 15 20 25 30 35 40 45 50 55 60
Leak
Rat
e (m
bar l
/s)
Stress (MPa)
Ni-Cr Wire Reinforcement Flexible Graphite Packing
1,00E-06
1,00E-05
1,00E-04
1,00E-03
1,00E-02
1,00E-01
1,00E+00
0 5 10 15 20 25 30 35 40 45 50 55 60
Leak
Rat
e (m
bar l
/s)
Stress (MPa)
Ni-Cr Wire Mesh Reinforced Yarn Flexible Graphite Packing(no impregnation)
1,00E-06
1,00E-05
1,00E-04
1,00E-03
1,00E-02
1,00E-01
1,00E+00
0 5 10 15 20 25 30 35 40 45 50 55 60
Leak
Rat
e (m
bar l
/s)
Stress (MPa)
Carbon and Flexible Graphite Packing with Graphiteimpregnation
Packing Minimum Seating StressSealing for a Safer and Greener Tomorrow
Packing Drag, Force Transmission and Thermal Expansion
1 – Stem 6 – Bushing2 – Gland 7 – Load Cell3 – Bonnet 8 – Load Cell Base4 – Internally Gaged Bolt 9 – Electrical Resistance5 – Packing
Sealing for a Safer and Greener Tomorrow
Packing Drag
0
5000
10000
15000
20000
0 20 40 60 80 100Gland Stress (MPa)
Fric
tion
Forc
e (N
)
2 Rings4 Rings5 Rings7 Rings
Ni-Cr Wire Mesh Reinforced Yarn Flexible Graphite Packing(no impregnation)
0
5000
10000
15000
20000
0 20 40 60 80 100Gland Stress (MPa)
Fric
tion
Forc
e (N
)
2 Rings4 Rings5 Rings7 Rings
Ni-Cr Wire Reinforcement Flexible Graphite Packing
0
5000
10000
15000
20000
0 20 40 60 80 100Gland Stress (MPa)
Fric
tion
Forc
e (N
)
2 Rings4 Rings5 Rings7 Rings
Carbon and Flexible Graphite Packing with Graphite impregnation
0
5000
10000
15000
20000
0 20 40 60 80 100Gland Stress (MPa)
Fric
tion
Forc
e (N
)
2 Rings4 Rings5 Rings7 Rings
Expanded PTFE filled with Barium Sulphate Packing
Sealing for a Safer and Greener Tomorrow
Force Transmission
0%
20%
40%
60%
80%
100%
0 20 40 60 80 100Gland Stress (MPa)
(%
)
2 Rings4 Rings5 Rings7 RingsSmin(0,01)
Ni-Cr Wire Mesh Reinforced Yarn Flexible Graphite Packing(no impregnation)
0%
20%
40%
60%
80%
100%
0 20 40 60 80 100Gland Stress (MPa)
(%
)
2 Rings4 Rings5 Rings7 RingsSmin(0,01)
Carbon and Flexible Graphite Packing with Graphite impregnation
0%
20%
40%
60%
80%
100%
0 20 40 60 80 100Gland Stress (MPa)
(%
)2 Rings4 Rings5 Rings7 RingsSmin(0,01)
Expanded PTFE filled with Barium Sulphate Packing
0%
20%
40%
60%
80%
100%
0 20 40 60 80 100Gland Stress (MPa)
(%
)
2 Rings4 Rings5 Rings7 RingsSmin(0,01)
Ni-Cr Wire Reinforcement Flexible Graphite Packing
Sealing for a Safer and Greener Tomorrow
- Drag forces- Sealability
Other Rigs for Testing Drag - Knife Valve Test Sealing for a Safer and Greener Tomorrow
35643168277223761980158411887923961
160
155
150
145
140
Index
P_H
2O(p
si)
182736
(lb.ft)TORQUE
STUD
P_H2O for STYLE C (ePTFE/Graphite)
35643168277223761980158411887923961
300
200
100
0
-100
-200
-300
Index
F_D
RA
G(l
bf)
182736
(lb.ft)TORQUE
STUD
F_DRAG for STYLE C (ePTFE/Graphite)
36363232282824242020161612128084041
160
155
150
145
140
Index
P_H
2O(p
si)
182736
(lb.ft)TORQUE
STUD
P_H2O for STYLE A (Synthetic/PTFE)
36363232282824242020161612128084041
300
200
100
0
-100
-200
-300
Index
F_D
RA
G(l
bf)
182736
(lb.ft)TORQUE
STUD
F_DRAG for STYLE A (Synthetic/PTFE)
Drag and Sealability Test ResultsSealing for a Safer and Greener Tomorrow
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
4,00
4,50
5,00
Ds 1
(MP
a)
Style A Style B Style C Style D
Thermal Expansion Test ResultsAmbient to 212F (100C)
Style Yarn FillerComparative
e-PTFE content
A e-PTFE None 100% e-PTFE
B e-PTFE Barium Sulphate B% < A%
C e-PTFE Barium Sulphate C % < A% & B%
D e-PTFE Graphite D% < A%, B% & C%
Sealing for a Safer and Greener Tomorrow
Thermal Expansion Test ResultsAmbient to 212F (100C)
PTFE Packing Extrusion due to Thermal Expansion
Sealing for a Safer and Greener Tomorrow
Thermal Gravimetric Analysis - TGASealing for a Safer and Greener Tomorrow
Packing
External Leakeage
API 607 TestAfter burn and cool-down (5min)
Style E 0.0 mL/min CERTIFIED
Style F 0.0 mL/min CERTIFIED
Style H 0.2 mL/min CERTIFIED
Material Degradation andAPI 607 Simulation
Validation
Sealing for a Safer and Greener Tomorrow
Galvanic CellCorrosion Test
Sealing for a Safer and Greener Tomorrow
CorroTest
0,00%
0,50%
1,00%
1,50%
2,00%
2,50%
3,00%
Inhi
bito
r 1
Inhi
bito
r 2
Inhi
bito
r 3
no In
hibi
tor
Inhi
bito
r 4
Inhi
bito
r 1
Inhi
bito
r 2
Inhi
bito
r 3
no In
hibi
tor
Inhi
bito
r 4
Inhi
bito
r 1
Inhi
bito
r 2
Inhi
bito
r 3
no In
hibi
tor
Inhi
bito
r 4
1010 304 410
Average Mass Loss
Sealing for a Safer and Greener Tomorrow
Low Emission Valves Test RigsSealing for a Safer and Greener Tomorrow
R&D ResultsSealing for a Safer and Greener Tomorrow
ConclusionsMinimum Seating Stress
Leak free installation and start-upIncrease plant safety and reduce costs
Stem Torque or Drag determinationDesign of actuation devices
Thermal Expansion and Contraction EffectsDevelop lower thermal expansion packingsInstallation proceduresFire Safe
Corrosion InhibitorsProtection of Equipment
API 622, API624 (valve), ISO 15848, VDI2440, othersConsolidation - Development of Low Emission Packings
Sealing for a Safer and Greener Tomorrow
José C. VeigaLuiz Paulo C. V. Romano
Gustavo M. SilvaTeadit Industria e Comércio
Rio de Janeiro, Brasil
Carlos D. Girã[email protected]
Teadit Packing & GasketVadodara, India
VALVE AND PACKING DEVELOPMENT TESTING
Thank you!