SIST EN ISO 15848-1:2006

Industrial valves - Measurement, test and qualification procedures for fugitive emissions - Part 1: Classification system and qualification procedures for type testing of valves (ISO 15848-1:2006)

This part of ISO 15848 specifies testing procedures, for evaluation of external leakage of valve stem seals (or shaft) and body joints of isolating valves and control valves intended for application in volatile air pollutants and hazardous fluids. End connection joints, vacuum application, effects of corrosion and radiation are excluded from this part of ISO 15848. This part of ISO 15848 concerns classification system and qualification procedures for type testing of valves.

Industriearmaturen - Mess-, Prüf- und Qualifikationsverfahren für flüchtige Emissionen - Teil 1: Klassifizierungssystem und Qualifikationsverfahren für die Bauartprüfung von Armaturen (ISO 15848-1:2006)

Dieser Teil von ISO 15848-1 legt Prüfverfahren fest für die Bewertung der äußeren Undichtheit von Schaft- bzw. Wellenabdichtungen von Armaturen, Gehäuseverbindungen von Absperrventilen und Stellgeräten zur Verwendung mit flüchtigen luftverunreinigenden Stoffen und gefährlichen Flüssigkeiten. Anschlussverbindungen, Anwendungen in der Vakuumtechnik, Auswirkungen von Korrosion und Bestrahlung fallen nicht in den Anwendungsbereich dieses Teils von ISO 15848-1.
Dieser Teil von ISO 15848-1 beinhaltet ein Klassifizierungssystem und Qualifikationsverfahren für die Durchführung von Bauartprüfungen an Armaturen.

Robinetterie industrielle - Mesurage, essais et modes opératoires de qualification pour émissions fugitives - Partie 1: Systeme de classification et modes opératoires de qualification pour les essais de type des appareils de robinetterie (ISO 15848-1:2006)

L'ISO 15848-1:2006 spécifie des modes opératoires d'essai pour l'évaluation des fuites externes des dispositifs d'étanchéité de la tige (ou de l'arbre) des appareils de robinetterie, et des jonctions du corps des robinets de sectionnement et des robinets de régulation destinés à être utilisés au contact de polluants atmosphériques volatils et de fluides dangereux. Les jonctions des raccords d'extrémité, les applications sous vide, les effets de la corrosion et des rayonnements sont exclus de l'ISO 15848-1:2006.
L'ISO 15848-1:2006 concerne le système de classification et les modes opératoires de qualification pour les essais de type des appareils de robinetterie.

Industrijski ventili – Meritve, preskusi in postopki kvalificiranja pobeglih emisij – 1. del: Klasifikacijski sistem in kvalifikacijski postopki za preskušanje tipa ventilov (ISO 15848-1:2006)

General Information

• Status: Withdrawn
• Publication Date: 30-Apr-2006
• Withdrawal Date: 09-Jul-2015
• ICS: 23.060.01 - Valves in general
• Technical Committee: IHPV - Hydraulics and pneumatics
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 10-Jul-2015
• Due Date: 02-Aug-2015
• Completion Date: 10-Jul-2015
• Ref Project: EN ISO 15848-1:2006 - Industrial valves - Measurement, test and qualification procedures for fugitive emissions - Part 1: Classification system and qualification procedures for type testing of valves (ISO 15848-1:2006)

Relations

• Replaced By: SIST EN ISO 15848-1:2015 - Industrial valves - Measurement, test and qualification procedures for fugitive emissions - Part 1: Classification system and qualification procedures for type testing of valves (ISO 15848-1:2015)
• Effective Date: 01-Sep-2015

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 15848-1:2006
01-maj-2006
Industrijski ventili – Meritve, preskusi in postopki kvalificiranja pobeglih emisij –
1. del: Klasifikacijski sistem in kvalifikacijski postopki za preskušanje tipa ventilov
(ISO 15848-1:2006)
Industrial valves - Measurement, test and qualification procedures for fugitive emissions -
Part 1: Classification system and qualification procedures for type testing of valves (ISO
15848-1:2006)
Industriearmaturen - Mess-, Prüf- und Qualifikationsverfahren für flüchtige Emissionen -
Teil 1: Klassifizierungssystem und Qualifikationsverfahren für die Bauartprüfung von
Armaturen (ISO 15848-1:2006)
Robinetterie industrielle - Mesurage, essais et modes opératoires de qualification pour
émissions fugitives - Partie 1: Systeme de classification et modes opératoires de
qualification pour les essais de type des appareils de robinetterie (ISO 15848-1:2006)
Ta slovenski standard je istoveten z: EN ISO 15848-1:2006
ICS:
23.060.01 Ventili na splošno Valves in general
SIST EN ISO 15848-1:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 15848-1:2006

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SIST EN ISO 15848-1:2006
EUROPEAN STANDARD
EN ISO 15848-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2006
ICS 23.060.01

English Version
Industrial valves - Measurement, test and qualification
procedures for fugitive emissions - Part 1: Classification system
and qualification procedures for type testing of valves (ISO
15848-1:2006)
Robinetterie industrielle - Mesurage, essais et modes Industriearmaturen - Mess-, Prüf- und
opératoires de qualification pour émissions fugitives - Partie Qualifikationsverfahren für flüchtige Emissionen - Teil 1:
1: Système de classification et modes opératoires de Klassifizierungssystem und Qualifikationsverfahren für die
qualification pour les essais de type des appareils de Bauartprüfung von Armaturen (ISO 15848-1:2006)
robinetterie (ISO 15848-1:2006)
This European Standard was approved by CEN on 28 December 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15848-1:2006: E
worldwide for CEN national Members.

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SIST EN ISO 15848-1:2006

EN ISO 15848-1:2006 (E)





Foreword


This document (EN ISO 15848-1:2006) has been prepared by Technical Committee ISO/TC 153
"Valves" in collaboration with Technical Committee CEN/TC 69 "Industrial valves", the
secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by July 2006, and conflicting national standards
shall be withdrawn at the latest by July 2006.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.


Endorsement notice

The text of ISO 15848-1:2006 has been approved by CEN as EN ISO 15848-1:2006 without any
modifications.

2

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SIST EN ISO 15848-1:2006


INTERNATIONAL ISO
STANDARD 15848-1
First edition
2006-01-15


Industrial valves — Measurement, test
and qualification procedures for fugitive
emissions —
Part 1:
Classification system and qualification
procedures for type testing of valves
Robinetterie industrielle — Mesurage, essais et procédures de
qualification pour émissions fugitives —
Partie 1: Système de classification et procédures de qualification pour
essais de type des appareils de robinetterie




Reference number
ISO 15848-1:2006(E)
©
ISO 2006

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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
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©  ISO 2006
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
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Published in Switzerland

ii © ISO 2006 – All rights reserved

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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Abbreviations . 3
5 Type test . 4
5.1 Test conditions . 4
5.2 Test procedures . 7
6 Performances classes. 10
6.1 Classification criteria. 10
6.2 Tightness classes. 10
6.3 Endurance classes . 11
6.4 Temperature classes . 13
6.5 Examples of class designation . 14
6.6 Marking . 14
7 Reporting . 15
8 Extension of qualification to untested valves . 16
Annex A (normative) Total leak rate measurement . 17
Annex B (normative) Leak measurement using the sniffing method . 31
Annex C (informative) Derivation and graphs relating the stem diameter to leak rate. 40
Bibliography . 48

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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15848-1 was prepared by Technical Committee ISO/TC 153, Valves, Subcommittee SC 1, Design,
manufacture, marking and testing.
ISO 15848 consists of the following parts, under the general title Industrial valves — Measurement, test and
qualification procedures for fugitive emissions:
— Part 1: Classification system and qualification procedures for type testing of valves
— Part 2: Production acceptance test of valves
iv © ISO 2006 – All rights reserved

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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
Introduction
The objective of this part of ISO 15848 is to enable classification of performance of different designs and
constructions of valves to reduce fugitive emissions.
This part of ISO 15848 defines type test for evaluation and qualification of valves where fugitive emissions
standards are specified.
The procedures of this part of ISO 15848 can only be used with the application of necessary precautions for
testing with flammable or inert gas at temperature and under pressure.

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SIST EN ISO 15848-1:2006

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SIST EN ISO 15848-1:2006
INTERNATIONAL STANDARD ISO 15848-1:2006(E)

Industrial valves — Measurement, test and qualification
procedures for fugitive emissions —
Part 1:
Classification system and qualification procedures for type
testing of valves
1 Scope
This part of ISO 15848 specifies testing procedures, for evaluation of external leakage of valve stem seals (or
shaft) and body joints of isolating valves and control valves intended for application in volatile air pollutants
and hazardous fluids. End connection joints, vacuum application, effects of corrosion and radiation are
excluded from this part of ISO 15848.
This part of ISO 15848 concerns classification system and qualification procedures for type testing of valves.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 5208, Industrial valves — Pressure testing of valves
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
body seals
any seal in pressure containing part except stem (or shaft) seals
3.2
Class
a convenient round number used to designate pressure-temperature ratings
NOTE It is designated by the word “Class” followed by the appropriate reference number from the following series:
Class 125, Class 150, Class 250, Class 300, Class 600, Class 900, Class 1 500, Class 2 500.
3.3
concentration
ratio of test fluid volume to the gas mixture volume measured at the leak source(s) of the test valve
NOTE The concentration is expressed in ppmv (parts per million volume), which is a unit deprecated by ISO
3 3 3
(1 ppmv = 1 ml/m = 1 cm /m ).
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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
3.4
control valve
power operated device which changes the fluid flow rate in a process control system and which consists of a
valve connected to an actuator that is capable of changing the position of a closure member in the valve in
response to a signal from the controlling system
3.5
fugitive emission
any chemical or mixture of chemicals, in any physical form, which represents an unanticipated or spurious
leak from equipment on an industrial site
3.6
leakage
loss of the test fluid through the stem (or shaft) seal or body seal(s) of a test valve under the specified test
conditions and which is expressed as a concentration or a leak rate
3.7
leak rate
−1
mass flow rate of the test fluid, expressed in mg·s per meter of the perimeter of the stem
3.8
local leakage
measurement of the test fluid leakage using a probe at the leak source point
3.9
mechanical cycle of control valves
for linear/rotary control valves, test cycles performed at 50 % of stroke/angle with an amplitude of ± 10 % of
full stroke/angle
3.10
mechanical cycle of isolating valves
motion of a valve obturator moving from the fully closed position to the fully open position, and returning to the
fully closed position
3.11
nominal size
DN
alphanumeric designation of size for components of a pipework system, which is used for reference purposes
and which comprises the letters DN followed by a dimensionless whole number which is directly related to
physical size, in millimetres, of the bore or outside diameter of the end connections
NOTE 1 The nominal diameter is designated by the letters DN followed by a number from the following series: 10, 15,
20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, etc.
NOTE 2 The number following the letters DN does not represent a measurable value and should not be used for
calculation purposes except where specified in the relevant standard.
3.12
nominal pressure
PN
numerical designation which is a convenient rounded number for reference purposes
NOTE 1 All equipment of the same nominal size (DN) designated by the same PN number has the compatible mating
dimensions.
NOTE 2 The maximum allowable working pressure depends upon materials, design and working temperatures and
should be selected from the pressure/temperature rating tables in the appropriate standards.
NOTE 3 The nominal pressure is designated by the letters PN followed by the appropriate reference number from the
following series: 2,5, 6, 10, 16, 20, 25, 40, 50, etc.
2 © ISO 2006 – All rights reserved

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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
3.13
isolating valve
valve intended for use principally in the closed or open position which may be power actuated or manually
operated
3.14
performance class
level of the performance of a test valve defined by the criteria specified in Clause 6
3.15
room temperature
temperature in the range of − 29 °C to + 40 °C
3.16
stem
shaft
valve component extending into the valve shell to transmit the linear/rotary motion from the actuating device to
the valve obturator
3.17
stem seal
shaft seal
component(s) installed around the valve stem (or shaft) to avoid leakage of internal fluids to atmosphere
3.18
test pressure
pressure used for testing the valve which, unless otherwise specified, shall be the rated pressure specified at
the test temperature and the shell material of a test valve in the relevant standards
3.19
test temperature
fluid temperature selected for the test from Table 3 as measured inside the test valve
3.20
thermal cycle
change of the temperature from the room temperature to the specified test temperature and return to the room
temperature
3.21
total leakage
collection of leakage of the test fluid at the leak source using an encapsulation method
3.22
type test
a test conducted to establish the performance class of a valve
4 Symbols and abbreviations
M predicted maximum leakage
alr
SSA stem (or shaft) seal adjustment
NOTE The abbreviation SSA corresponds to the abbreviation of “Stem Seal Adjustement”.
OD external diameter of the stem
stem
RT ambient temperature
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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
5 Type test
5.1 Test conditions
5.1.1 Preparation of a valve to be tested
Only a fully assembled valve shall be used for the test.
A valve shall be selected from standard production at random. The valve shall have been tested and accepted
in accordance with ISO 5208 or any other applicable standard and no subsequent protective coating shall
have been applied.
Additional seal arrangements to allow the stem sealing system leakage measurement is permitted and shall
not affect the sealing performance of the valve.
The test valve interior shall be dried and lubricants (if any) shall be removed. The valve and test equipment
shall be clean and free of water, oil and dust and the packing may be changed prior to the test. If the valve
packing is changed prior to the test, it should be done under the supervision of the valve manufacturer.
If a test valve is equipped with a manually adjustable stem (or shaft) seal(s), it shall be initially adjusted
according to the manufacturer instructions, and recorded in the test report as provided in Clause 7.
The valve manufacturer shall select the appropriate actuating device.
5.1.2 Test fluid
The test fluid shall be helium gas of 97 % minimum purity or methane of 97 % minimum purity. The same test
fluid shall be used throughout the test.
5.1.3 Test temperature
Valve mechanical cycling is carried out at the room temperature or in the steps of the room temperature and
the selected test temperature other than the room temperature (see 5.2.4.1).
The test temperature shall be recorded for each leakage measurement.
5.1.4 Measurement of test valve temperature
The temperature of the test valve shall be measured at three locations (X, Y, Z), as shown in Figure 1, and
recorded in a test report.
a) Measurement at location “X” shall be used to determine the test temperature.
b) Measurement at location “Z “is used to determine the external valve temperature adjacent to the stem (or
shaft) seal(s) for information.
c) Measurement at location “Y” is also made for information. Any use of insulation shall be detailed in the
test report.
All temperatures at location X, Y and Z shall be stabilized before leakage is measured (see Figure 2).
Temperature at location “Z” shall be stabilized for minimum 10 min prior to leakage measurement.
Check if the temperature variation is within ± 5 %.
4 © ISO 2006 – All rights reserved

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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)

Key
1 location X: flow path (temperature T )
1
2 location Y: valve body (temperature T )
2
3 location Z: stuffing box (temperature T )
3
Figure 1 — Measurements of temperature at three locations
(when the valve is internally heated or cooled)

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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)

Key
T test temperature, °C
test
T stabilization temperature at location X (flow path)
1
T stabilization temperature at location Y (valve body)
2
T stabilization temperature at location Z (stuffing box)
3
t time
a
Stabilization of temperature at location Z (stuffing box).
b
Start of mechanical cycles.
Figure 2 — Stabilization of temperatures
5.1.5 Leakage measurement
5.1.5.1 Stem (or shaft) leakage measurement
Leakage shall be measured from a test valve at rest in the partly open position.
The leakage measurement shall be performed by the global method (flushing or vacuum) according to the
procedures described in Annex A.
5.1.5.2 Body seal leakage measurement
The leakage shall be measured by the sniffing method according to the procedure described in Annex B and
3 3 3
expressed in parts per million volume (1 ppmv = 1 ml/m = 1 cm /m ).
Evaluation of the end connections should be done to insure that they do not affect the results of the evaluation
of the body seals.
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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
5.1.5.3 Leakage-measurement records
All results of leakage measurements shall be recorded in a test report as specified in Clause 7.
5.2 Test procedures
5.2.1 Safety rules
Testing with high pressure gas is potentially hazardous and thus all applicable local safety rules and adequate
safety measures shall be followed. If methane (CH ) is used, the combination of the test pressure and
4
temperature shall be reviewed for possible combustion concerns.
5.2.2 Test equipment
The test equipment shall be appropriately selected to
a) apply and maintain the test pressure within a range of ± 5 % of the nominal value;
b) apply valve mechanical cycles;
c) heat or cool the test valve to the selected test temperature, and maintain it within a range of ± 5 % but not
exceeding 15°C; no mechanical cycling is permitted during temperature change;
d) measure and record time, pressure, temperature, leakage and duration of a valve mechanical cycle;
e) measure and record actuation forces or torques to operate a test valve;
f) measure and record the stem sealing system loading, if applicable.
5.2.3 Stem (or shaft) seal adjustment (SSA)
5.2.3.1 Number of stem seal adjustment
Mechanical adjustments of stem (or shaft) sealing system during the type test shall be permitted only once, as
shown below, for each of qualification stage done according to Figures 3 and 4, if stem (or shaft) leakage has
been measured in excess of the target tightness class selected from Tables 1 or 2.
The maximum re-tightening force (or torque) to apply shall be determined prior to the type test.
EXAMPLE — A maximum of one adjustment is accepted for CC1 or CO1;
— A maximum of two adjustments is accepted for CC2 or CO2.
5.2.3.2 Test failure after stem seal adjustment
If a stem (or shaft) sealing arrangement fails to achieve the target tightness class, or it is not possible to
continue mechanical cycling, the test shall be considered terminated, and the test valve shall be evaluated for
qualification of lower tightness and endurance classes, if applicable.
5.2.3.3 Reporting the number of SSA
The total number of stem (or shaft) seal adjustment shall be recorded in the test report and indicated in the
designation of the valve classification as “SSA-1”, “SSA-2” and so forth.
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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
5.2.4 Test description
5.2.4.1 General
The test description is the following.
a) The test valve shall be mounted on a test rig, according to the instructions given by the manufacturer.
b) The valve mounting shall be principally made with a stem (or shaft) positioned vertical. A valve intended
for use in other positions shall be mounted with the stem (or shaft) positioned horizontally.
c) All sealing systems shall have been properly adjusted beforehand, according to the manufacturer's
instructions. For valves using packings as a stem seal, the tightening torque of the gland boltings shall be
measured and recorded at the beginning of the test and after any stem seal adjustment.
d) The target number and combination of mechanical and thermal cycles shall be selected from the
endurance classes specified in Figures 3 and 4.
e) Leakage from the stem (or shaft) seal and from the body seals shall be separately measured. If the valve
does not allow such a separate measurement the total leakage of both stem (or shaft) and body seals
shall be measured at the same time according to Annex A.
f) Actual methods of mechanical cycles other than those specified in 5.2.4.2 and 5.2.4.3 shall be in
accordance with the manufacturer's instructions, and opening, closing and dwelling time shall be
recorded in the test report. Basically, they shall represent the intended operating conditions of a test valve.
g) Valve opening and closing force (or torque) shall be measured and recorded at the start and at the end of
the test, following subsequent stem seal adjustments if applicable.
5.2.4.2 Mechanical cycles of isolating valves
Unless otherwise specified by the valve manufacturer, the valve seating force (or torque) required for
tightness under a differential pressure of 0,6 MPa (6 bar), air or inert gas shall be used as the minimum force
(or torque) for mechanical cycle of a test valve.
Fully back seating a test valve is not required.
5.2.4.3 Mechanical cycles of control valves
The stem motion of linear action valves shall be between 1 mm/s and 5 mm/s. The shaft motion of rotary
control valves shall be between 1°/s and 5°/s.
The actuator to operate a test valve shall withstand only the pressure and friction force (or torque) acting on
the valve stem, and these values shall be recorded.
NOTE Measurement of friction force (or torque) is principally intended to check the packing friction usually expressed
as the dead band.
5.2.4.4 Preliminary tests at the room temperature (test 1)
The tests are carried out as shown below.
a) Pressurize a test valve with the test fluid to the test pressure as specified in a relevant standard.
b) After the test pressure has been stabilized, measure leakages both from the stem (or shaft) seal and from
the body seals, in accordance with Annexes A and B, respectively.
c) Record the test result in a test report.
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SIST EN ISO 15848-1:2006
ISO 15848-1:2006(E)
5.2.4.5 Mechanical cycle test at the room temperature (test 2)
The tests are carried out as shown below.
a) Perform mechanical cycles at room temperature while the test valve is kept pressurized.
b) Measure the leakage from the stem (or shaft) seal only, in accordance with Annex A.
c) Record the test result in the test report.
d) Repeat the test in case of Class CO1 and CC1, as indicated in Figures 3 and 4.
5.2.4.6 Static test at the selected test temperature (test 3)
The tests are carried out as shown below.
a) Pressurize a test valve with the test fluid to the test pressure as specified in a relevant standard for the
selected test temperature selected from Table 3.
b) After the test pressure has been stabilized, adjust the valve temperature to the selected test temperature,
ensuring that the test pressure does not exceed the level specified in the relevant standard.
c) After the valve temperature has been stabilized with an allowance of ± 5 % with a maximum of 15 °C,
measure the leakage from the stem (or shaft) seal only in accordance with Annex A.
d) Record the test result in the test report.
e) Repeat the test in case of Class C01 and CC1, as indicated in Figures 3 and 4.
5.2.4.7 Mechanical
...