emmanuel sauger cetim
TRANSCRIPT
ISO 15848-1: comparison with new fugitive emission standards Emmanuel SAUGER Cetim
28/05/2015 IVS 2015 • International Conference on Valve and Flow Control Technologies 1
Project overview
• ISO 15848-1 is published since March 2006: “Classification system and qualification procedures for type testing of valves” o End of DIS Enquiry (23/06/2014). Result of votes: approved.
o FDIS Enquiry (November 2014 - January 2015). Result of votes: approved.
o Publication of ISO 15848-1 rev 2 : June 2015
• Test program at Cetim o Study of ISO 15848-1 changes
o Study of a valve performance (with the same packing) using various existing
fugitive emission standards
28/05/2015 IVS 2015 • International Conference on Valve and Flow Control Technologies 2
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• Type of valve – ON/OFF – Control
• Source of emission
– Stem seal system – Body-bonnet seal
• Test fluid – Helium – Methane
• Test pressure – Pressure class (P/T rating)
• Fugitive emission measurement – Global method (stem seal)
– Sniffing (body-bonnet seal)
• Performance class – Tightness class
– Endurance class
– Temperature class
Changes of ISO 15848-1
ISO 15848-1 (March 2006)
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n Flushing n Vacuum method
Global methods are quantitative, reliable, reproducible Difficult to perform, often need adaptation of the valve
Changes of ISO 15848-1
ISO 15848-1 (March 2006) – Global methods
New global methods
n Accumulation (EN 13185) n « Suck through Method »
Gas detector
T1, C1 T2, C2
Volume V
( )( )f
pl
fC
QCCQ
−
×−∞=1
( )( )12
1l tt
VCCQ
−
×−= 2
0,0E+00
2,0E-06
4,0E-06
6,0E-06
8,0E-06
1,0E-05
1,2E-05
1,4E-05
1,6E-05
1,8E-05
0 2000 4000 6000 8000Rea
ding
of t
he h
eliu
m m
ass
spec
trom
eter
Time (s)
C∞
Cf
Changes of ISO 15848-1
6
mg.s-‐1.m-‐1 per meter of stem circumference H : Helium M : Methane
Leak
rate
(mg.
s-1.m
-1)
Time (s)
Stabilisation time t1
Stabilisation time t2
t1 t2
Leakage 1
Leakage 2
Leak rate – Global measurement mg.s-‐1.m-‐1
AH & AM 10-‐6 BH & BM 10-‐4 CH & CM 10-‐2
Leakage – Sniffing (local measurement) ppmv
Helium ≤ 50 Methane ≤ 50
Changes of ISO 15848-1
ISO 15848-1 (March 2006) – Tightness classes
• Helium and methane o Stem seal system
o Body-bonnet seal
Vaccum
+ accumulation & suck through
New unit
7
ISO 15848-1 (March 2006) – Tightness classes
Changes of ISO 15848-1
• Helium – Stem seal system
– Body seal
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Changes of ISO 15848-1
ISO 15848-1 (March 2006) – Tightness classes
• Methane – Stem seal system
– Body seal
– § 6.2.4 There is no correlation intended between measurements of total leak rate
as described in Annex A and local sniffed concentration as described in Annex B.
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(t-196) (t-46°C) (tRT) (t200°C) (t400°C)
- 196°C -46° C Room temperature °C 200° C 400° C
FLOW LINE (T1)
STUFFING BOX (T3)
BODY (T2)
T Flow Line (T1)
T Body (T2)
T Stuffing Box (T3)
Time
Temperature
t
Changes of ISO 15848-1
ISO 15848-1 (March 2006) – Temperature classes
o Reference flow line temperature
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T1
T2
T3
Ttest
time
ISO 15848-1 (March 2006) – Temperature classes
o Temperature reference at location 1 (flow line)
o Optional thermocouple: location 4 may be used instead of location 1
Changes of ISO 15848-1
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On - off valves (full stroke) : endurance classes
0 500 1000 1500 2000 2500 3000
Number of mechanical cycles
Test
tem
pera
ture
(°C
) Test Fluid Pressure
Measurement of leakage of body sealMeasurement of leakage of stem sealTest Fluid Pressure
CO1CO2 CO3
ttest
RT1 2 25 66 622
4 3 4 3 43 43
Control valve : endurance classes
0 20000 40000 60000 80000 100000 120000
Number of mechanical cycles
Test
tem
pera
ture
(°C
)
Test Fluid Pressure
Measurement of leakage of body sealMeasurement of leakage of stem sealTest Fluid Pressure
CC1 CC2CC3
RT
ttest
1
4 3 4 3 43 4
2 2 66 622
3
5
Changes of ISO 15848-1
ISO 15848-1 (March 2006) – Endurance classes
- Mechanical cycles + Thermal cycles - Nature and number of cycles are different for ON/OFF and Control Valves
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Changes of ISO 15848-1
ISO 15848-1 (March 2006) – Endurance classes
- CO1: 2 thermal cycles + 205 mechanical cycles - CO2 et CO3 unchanged
Publication of EN ISO 15848-1 and 2 : June 2015
ISO 15848-1:Testing facilities
03/2014 : ISO 17025 Certification by French Committee COFRAC
o Validation of High Quality Measurements
o Test capacity: • 18’’ (15 tonnes) • 450 bar • -150°C to 450°C
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Study of ISO 15848-1 changes – comparison with other standards
Chamber
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Study of ISO15848-1 changes – comparison with other standards
• Work program with French Valve Manufacturers – Instrumentation of a valve (API 600, 4’’Cl300) to perform
helium and methane measurements with various methods (vacuum, accumulation, suck through, sniffing)
– Graphite based packings • ISO 15848-1 helium and CH4 à influence of test fluid and method • API 624 helium and CH4 à influence of test fluid and sniffing
Study of ISO 15848-1 changes
GT Etanchéité du 21/10/2014
• Work program – Test on API 622 bench with the same packings
• API 622 according API622 and API624 – To compare API622 and API624 – To compare test on valve and test on bench
hydraulic cylinder for stem movements
Detection of VOC with Foxborow TVA1000
page 15 15
Study of ISO15848-1 changes – comparison with other standards
Study of ISO 15848-1 changes
Current status • Progress from the previous work
29/05/15 IVS 2015 • International Conference on Valve and Flow Control Technologies 16
Step Description Status
1 Instrumentation of a valve (Atex heating system, …) ü 2
Helium test according to ISO 15848-1 ü Methane test according to ISO 15848-1 in progress
3 Helium test according to API624 ü
Methane test according to API624 in progress
4 Methane test according to API622 ü Methane test according to API624 ü
5 Helium test according to API641 in progress
Methane test according to API641 in progress
Study of ISO15848-1 changes – comparison with other standards
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0
40
80
120
160
200
240
280
1,E-‐08
1,E-‐07
1,E-‐06
1,E-‐05
1,E-‐04
1,E-‐03
1,E-‐02
1,E-‐01
0 50 100 150 200 250 300 350 400 450 500
Packing Temperature (°C) / Pressure (bar)
Leak ra
te (m
bar.l.s-‐1)
Number of cycles
Vacuum Flushing Accumulation Suck through VDI2440 Pressure Packing Temperature
CH (2006)
BH (2006)
AH (2006)
AH (2015)
VDI2440
• Some results (CO1; 260°C - SSS; 41,4 bar)
– good agreement between the methods – Vacuum method is well adapted for class AH
Study of ISO 15848-1 changes
Study of ISO15848-1 changes – comparison with other standards
0
50
100
150
200
250
300
1,00E-07
1,00E-06
1,00E-05
1,00E-04
1,00E-03
1,00E-02
1,00E-01
0 50 100 150 200 250 300
Cycles/Phasen
Fuite / Leak / Leck (mg.s-1.m-1) Pression/Presssure/Druck (bar) 'Température fluide
Valve reference :
�
�
Date / Datum:
�
�
�
�
Fuite
/ Le
ak /
Leck
(m
g.s-1
.m-1
)
ISO/CD 15848-1 Procedure 05/02/15
4"Cl300 Type de packing / Packing type : Graphite +AE
Classe BH
Classe CH
Classe AH
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Study of ISO 15848-1 changes
Study of ISO15848-1 changes – comparison with other standards
• Some results (API624; Helium; 260°C - SSS; 41,4 bar)
– Decrease of the leak rate during the first return at ambient temperature – Leak rate close to those measured with ISO 15848-1
• Conclusion o Second revision of EN ISO 15848-1 will be published in June of 2015
o ISO 15848-1 main changes are the following • leak rate at the stem seal (Table 1) is expressed in mbar.l.s-1 per mm stem diameter; • flushing method is replaced by accumulation or suck through method to measure leak rate from stem seal with Helium (Annex A);
• leakage with methane is measured by sniffing; leakage is expressed in ppmv;
• for tightness Class AH, leak rate ≤ 1,78·10-7 (10-5 mg.s-1.m-1) à TA Luft;
• tightness classes (Table 3): AM ≤ 50 ppmv; BM ≤ 100 ppmv; CM ≤ 500 ppmv;
• there is no correlation intended between helium (Class AH, Class BH, Class CH) and methane tightness classes (Class AM, BM and Class CM);
• minimum number of mechanical cycles required for isolating valves: 205 cycles (instead of 500) with two thermal cycles.
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Conclusion and scopes
• Looking forwad o A study is in progress
• To evaluate impact of ISO 15848-1 changes (e.g. new possible leak rate measurements, comparison with VDI2440-TA Luft…)
• To develop Test Rigs using methane as test fluid (API 622, API624, API641…)
• To compare ISO 15848-1 with other procedures with various parameters
Ü Test fluid
Ü Thermal cycles
Ü Mechanical cycles
Ü Leakage measurement methods
o Continuous evolution of test capacities of the Sealing Technology Lab to answer all kind of specific demand and ISO or API valve sealing system characterization
Acknowledgements to French Valve Manufacturers & to Profluid
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Conclusion and scopes
Looking forward
• Expiry of the next item
• Expected results
• Risks and known issues o Expected time for the analysis of these
issues
• Actions and measures immediately
following
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Dependencies and resources
Project
Suppliers
Manufacturing
Sales Technical activities
Remote teams
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Addendum
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Addendum
• Budget
• Design documents
• Marketing plan
• Additional documents
• Contact information
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