Railway applications - Straight and angled end cocks for brake pipe and main reservoir pipe

This document is applicable to manually operated end cocks designed to cut-off the brake pipe and the main reservoir pipe of the air brake and compressed air system of rail vehicles; without taking the type of vehicles and track-gauge into consideration.
This document specifies requirements for the design, dimensions, testing and certification (qualification and/or homologation), and marking.

Bahnanwendungen - Gerade und abgewinkelte Luftabsperrhähne für die Hauptluftleitung und Hauptbehälterleitung

Diese Europäische Norm gilt für manuell bediente Luftabsperrhähne an den Enden der Hauptluft  und der Hauptbehälterleitung im Druckluft( brems) system von Eisenbahnfahrzeugen, ohne Berücksichtigung der Bauart der Fahrzeuge und der Spurweite.
Diese Europäische Norm enthält Anforderungen hinsichtlich der Gestaltung, der Abmessungen, der Prüfung und der Zertifizierung (Qualifizierung und/ oder Zulassung) und der Kennzeichnung.

Applications ferroviaires - Robinets d'arrêt droit ou coudé pour conduite générale de frein et conduite principale

La présente Norme européenne est applicable aux robinets d’arrêt manoeuvrables manuellement, conçus pour
interrompre la conduite générale et la conduite principale des systèmes de freinage par air comprimé des véhicules
ferroviaires, sans considération du type des véhicules et de gabarit de la voie.
La présente Norme européenne donne les exigences à respecter pour la conception, les dimensions, les essais
et la certification (qualification et / ou homologation), et le marquage.

Železniške naprave - Ravne in kotne zaporne pipe za zavorne in glavne zračne vode

Ta dokument se uporablja za ročno upravljane zaporne pipe, ki so zasnovane za zapiranje zavornega in glavnega zračnega voda zračne zavore in sistema stisnjenega zraka v železniških vozilih; brez upoštevanja vrste vozila in širine tira.
Ta dokument določa zahteve za načrtovanje, mere, preskušanje in certificiranje (preskus ustreznosti in/ali homologacija) ter označevanje.

General Information

Status
Published
Publication Date
23-Dec-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
16-Dec-2021
Due Date
20-Feb-2022
Completion Date
24-Dec-2021

RELATIONS

Buy Standard

Standard
SIST EN 14601:2005+A2:2022
English language
32 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 14601:2005+A2:2022
01-februar-2022
Železniške naprave - Ravne in kotne zaporne pipe za zavorne in glavne zračne
vode

Railway applications - Straight and angled end cocks for brake pipe and main reservoir

pipe

Bahnanwendungen - Gerade und abgewinkelte Luftabsperrhähne für die Hauptluftleitung

und Hauptbehälterleitung

Applications ferroviaires - Robinets d'arrêt droit ou coudé pour conduite générale de frein

et conduite principale
Ta slovenski standard je istoveten z: EN 14601:2005+A2:2021
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
SIST EN 14601:2005+A2:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 14601:2005+A2:2022
---------------------- Page: 2 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 45.060.01 Supersedes EN 14601:2005+A1:2010
English Version
Railway applications - Straight and angled end cocks for
brake pipe and main reservoir pipe

Applications ferroviaires - Robinets d'arrêt droit ou Bahnanwendungen - Gerade und abgewinkelte

coudé pour conduite générale de frein et conduite Luftabsperrhähne für die Hauptluftleitung und

principale Hauptbehälterleitung

This European Standard was approved by CEN on 30 August 2010 and includes Amendment 2 approved by CEN on 4 October

2021.

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14601:2005+A2:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
Contents Page

Foreword ................................................................................................................................................. 4

1 Scope ........................................................................................................................................... 5

2 Normative references ........................................................................................................... 5

3 Terms and definitions .......................................................................................................... 5

4 Requirements ........................................................................................................................ 10

4.1 General ..................................................................................................................................... 10

4.2 Operating conditions .......................................................................................................... 10

4.3 Functional characteristics ................................................................................................. 11

4.3.1 General ..................................................................................................................................... 11

4.3.2 Open and closed positions ................................................................................................ 11

4.3.3 Lubrication ............................................................................................................................. 11

4.3.4 Venting port ........................................................................................................................... 11

4.3.5 Torque ...................................................................................................................................... 11

4.3.6 Spindle handle of the end cock ........................................................................................ 11

4.3.7 Fall time ................................................................................................................................... 12

4.3.8 Leakage .................................................................................................................................... 12

4.3.9 Vacuum withstanding ......................................................................................................... 12

4.3.10 Pneumatic shocks................................................................................................................. 13

4.4 Constructional characteristics ........................................................................................ 13

4.4.1 External appearance ........................................................................................................... 13

4.4.2 Connections ............................................................................................................................ 13

4.4.3 Space envelope ...................................................................................................................... 13

4.4.4 Mechanical shocks ............................................................................................................... 13

4.4.5 Resistance to torque ............................................................................................................ 13

4.4.6 Life expectancy ...................................................................................................................... 13

5 Type test methods ................................................................................................................ 13

5.1 Sampling for type test ......................................................................................................... 13

5.2 Test requirements ............................................................................................................... 14

5.3 Test procedure ...................................................................................................................... 14

5.3.1 Principle .................................................................................................................................. 14

5.3.2 Check of physical and geometrical characteristics .................................................. 15

5.3.3 Measurement of the operating torque ......................................................................... 15

5.3.4 Measurement of the pressure fall time ........................................................................ 15

5.3.5 Hydraulic test (water pressure) of the end cock body at given pressure ........ 17

5.3.6 Operating test under air flow condition ...................................................................... 18

5.3.7 Pneumatic test of the isolating device at given pressures and temperatures18

5.3.8 Endurance at ambient temperature with reduced air flow .................................. 20

5.3.9 Measurement of the operating torque drift ............................................................... 21

5.3.10 Vibration test ......................................................................................................................... 21

5.3.11 Resistance to shock test ..................................................................................................... 21

5.3.12 Vacuum test ............................................................................................................................ 22

5.3.13 Corrosion test ........................................................................................................................ 23

5.3.14 Resistance to torque ............................................................................................................ 23

5.3.15 Examination ........................................................................................................................... 25

---------------------- Page: 4 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)

5.4 Approval validity .................................................................................................................. 25

5.5 Type test report .................................................................................................................... 25

6 Homologation ........................................................................................................................ 25

6.1 General ..................................................................................................................................... 25

6.1.1 Procedure ................................................................................................................................ 25

6.1.2 Pass/fail criteria ................................................................................................................... 26

6.2 Homologation test report .................................................................................................. 26

7 Routine tests .......................................................................................................................... 26

8 Designation ............................................................................................................................. 26

9 Marking .................................................................................................................................... 27

Annex A (normative) Dimensions of end cocks ...................................................................... 28

Bibliography ......................................................................................................................................... 32

---------------------- Page: 5 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
Foreword
This document (EN 14601:2005+A2:2021) has been prepared by Technical Committee
CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN.

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 June 2022, and conflicting national

standards shall be withdrawn at the latest by June 2022.

Attention is drawn to the possibility that some of the elements of this document may be the

subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any

or all such patent rights.
This document includes Amendment 1, approved by CEN on 2010-08-30.
This document includes Amendment 2, approved by CEN on 2021-10-04.
This document supersedes #EN 14601:2005+A1:2010$.

The start and finish of text introduced or altered by amendment is indicated in the text by tags

! ".

The start and finish of text introduced or altered by amendment is indicated in the text by tags

# $.
#Deleted paragraphs$

Any feedback and questions on this document should be directed to the users’ national

standards body. A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of

the following countries are bound to implement this European Standard: Austria, Belgium,

Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain,

Sweden, Switzerland, Turkey and the United Kingdom.
---------------------- Page: 6 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
1 Scope

This European Standard is applicable to manually operated end cocks designed to cut-off the

brake pipe and the main reservoir pipe of the air brake and compressed air system of rail

vehicles; without taking the type of vehicles and track-gauge into consideration.

This European Standard specifies requirements for the design, dimensions, testing and

certification (qualification and/or homologation), and marking.
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.

EN 50125-1, Railway applications — Environmental conditions for equipment — Part 1:

Equipment on board rolling stock

EN 61373, Railway applications — Rolling stock equipment — Shock and vibration tests

(IEC 61373:1999)

EN ISO 228-2, Pipe threads where pressure-tight joints are not made on the threads — Part 2:

Verification by means of limit gauges (ISO 228-2:1987)
ISO 5208:1993, Industrial valves — Pressure testing of valves
ISO 8573-1:2001, Compressed air — Part 1: Contaminants and purity classes
ISO 9227:1990, Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions

For the purposes of this document, the following terms and definitions shall apply.

3.1
end cock

two position, three way cock, with no piped vent and, with a rotary spindle moved by the

operating handle
3.2 Components
3.2.1
port

terminus of a fluid passage in a component (to which may be connected pipelines) for the

transmission of fluid to, or from the component
3.2.1.1
venting port
port which provides passage to atmosphere
3.2.1.2
outlet port
port which is vented to atmosphere when the cock is closed
---------------------- Page: 7 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
3.2.1.3
inlet port
port which is not vented when the cock is closed
3.2.1.4
threaded port
port arranged to accept screw threaded connection
3.2.2
direction of rotation
direction of rotation quoted as viewed looking at the handle side
NOTE In case of doubt a sketch should be provided.
3.2.3
mechanical detent

spring arrangement to retain moving parts in open or closed position and only able to be moved

to another position with the specified force
3.2.4
latch

mechanical device to retain moving parts in open or closed position which can only be moved

when the latch is released
3.3 Types of end cocks
3.3.1 Design
3.3.1.1
straight end cock
cock with axis of inlet and outlet ports in line
NOTE See Figure 1.
---------------------- Page: 8 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
Figure 1 — Straight end cock
3.3.1.2
angled end cock
cock with axis of outlet port at an angle of (35 ± 2)° with axis of inlet port
NOTE See Figure 2.
Figure 2 — Angled end cock
---------------------- Page: 9 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
3.3.2 Location of the handle
3.3.2.1
right hand end cock

handle located at the right hand side of the end cock with the handle closed in a vertically

upwards position

NOTE 1 The end cock is opened by rotating the handle in an anticlockwise direction (see Figure 3).

NOTE 2 Standard mounting position. Other positions of handle are defined by drawing (see Figure 3).

Key
1 Closed position
2 Open position
3 Outlet port
4 Inlet port
Figure 3 — Right hand end cock
3.3.2.2
left hand end cock

handle located at the left hand side of the cock with the handle closed is in a vertically upwards

position

NOTE 1 The cock is opened by rotating the handle in a clockwise direction (see Figure 4).

NOTE 2 Standard mounting position. Other positions of handle are defined by drawing (see Figure 4).

---------------------- Page: 10 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
Key
1 Closed position
2 Open position
3 Outlet port
4 Inlet port
Figure 4 — Left hand end cock
3.4 States
3.4.1
closed position

position of the valve component part in which the flow path between inlet and outlet ports is

closed and the venting passage is open and connected to the hose and coupling side of the cock

NOTE 1 The cock handle is closed in the vertically upwards position on the vehicle.

NOTE 2 The purchaser will define the angle between the cock inlet port axis and the vertically

upwards handle position for cocks not mounted horizontally.
3.4.2
open position

position of the valve member in which the flow path between inlet and outlet ports is fully open,

and the venting passage is closed
3.4.3
fall time

time taken in a device for a quantity of air to fall from a specified high pressure level down to a

specified lower pressure level
NOTE Parameter used to define the fluid characteristic of the cock.
---------------------- Page: 11 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
3.4.4
proof pressure

test pressure, in excess of a maximum rated pressure, which causes no malfunction or

permanent deformation damage
3.5
temperature range
range of the temperature within which the apparatus can operate satisfactorily
3.6 Leakage
3.6.1
external leakage
leakage of the fluid contained in the end cock to atmosphere
3.6.2
internal leakage

leakage of the fluid contained in the end cock from one side to the other side with the valve

component part in the closed position
3.7
drift

change or variation of a condition with time under steady state operating conditions

3.8
life expectancy

predicted working period during which a component or system will maintain a specified level of

performance under specified conditions
NOTE Sometimes expressed in statistical term as a probability.
4 Requirements
4.1 General

Workmanship and quality shall be ensured by the manufacturer, therefore quality assurance is

the responsibility of the manufacturer under the agreement with the purchaser. Warranty of the

part is also the responsibility of the manufacturer in accordance with the agreement with the

purchaser.
4.2 Operating conditions
The end cock shall be able to function under the following conditions:

a) Where the air quality of the compressed air specified in ISO 8573-1:2001, class 4-4-5. This

requirement is verified when tests are carried out in accordance with 5.2.

b) In the temperature range for the environmental conditions to which the rail vehicle is

submitted during its operation and at least for a temperature range defined by the class T2

of EN 50125-1. The purchaser can specify a higher temperature value if operational

constraints demand it. This requirement is tested in accordance with 5.3.3, 5.3.7 and 5.3.12.

---------------------- Page: 12 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)

c) The end cock shall withstand the external corrosion due to normal atmospheric pollutants

as specified in EN 50125-1. The end cock is tested in accordance with the test shown

in 5.3.13.

d) In the vibrational environment of the rail vehicle on which it is mounted and it shall remain

in either the open or closed position. The cock shall be tested in accordance with 5.3.10.

4.3 Functional characteristics
4.3.1 General

The operating handle of the end cock shall be equipped with a detent or latch system.

The requirements given in 4.3.2 to 4.3.10 are defined to ensure the air flow through the brake

pipe and main reservoir pipe and ensure no malfunction of the cock after the brake pipe test (as

part of the brake test before the trains start).
4.3.2 Open and closed positions

The handle position shall be the same on any vehicle, so the opening and closing of the cock

shall be achieved by turning its spindle through a minimum of 90° and not more than 100°.

Stops shall be provided at the extremes of rotation, so that the open and closed positions are

achieved positively. The open and closed positions are defined in 3.4.1 and 3.4.2.

4.3.3 Lubrication

It shall be possible to operate the end cock at all pressures without additional lubrication.

4.3.4 Venting port

The end cock shall incorporate a venting port with a minimum area of 80 mm , arranged so that

when the cock is closed the compressed air from the coupling hose end of the cock (outlet port

connected to the next vehicle) can be exhausted to atmosphere. Venting shall have commenced

when the operation of the end cock has reduced the cross-sectional area of the bore of the end

cock by one third. The venting port shall not be able to be obstructed when the cock is mounted

on the rail vehicle.

The venting port shall be designed and arranged such that the under usual operation, the

operating personnel are not endangered by the exhaust-flow, or objects carried by it, nor by

excessive noise level.
4.3.5 Torque

All end cocks with mechanical detent, or with latch engaged shall not be operated by vibration

or shocks. The end cock shall be capable of manual operation therefore the operating torque of

the handle shall be in the range of 9 Nm to 20 Nm for end cocks with detent and a maximum of 6

Nm for cocks with latch. The torque is tested in accordance with 5.3.3. Torque drifts shall not be

allowed. This requirement is tested in accordance with 5.3.9.
4.3.6 Spindle handle of the end cock

Where the handle is detachable and the unique angular relationship between it and the spindle

is not constructionally ensured, it shall not be possible to assemble the handle to the spindle

except where the axis of the handle and the diametrical spindle mark are aligned and the

spindle shall be marked in accordance with Figure 5 or as otherwise specified by the purchaser.

The relative position of the handle and spindle, when assembled, shall be maintained under all

---------------------- Page: 13 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)

operating and environmental conditions. The notch in accordance with Figure 5 indicates the

position of the spindle (open/closed).

NOTE Detachable handles and the spindle should be designed in such a way that an unambiguous

angular relationship between handle and spindle will remain.
Figure 5 — Marking on end of the spindle
4.3.7 Fall time

The air passages shall be designed to minimize the air flow losses within the cock and the cross-

sectional area shall not be smaller than the cross-sectional area of a plain pipe of 25 mm

internal diameter. The pressure fall time should not be longer than that for an equivalent pipe of

the same nominal diameter, as tested in 5.3.4.
4.3.8 Leakage

The sealing arrangement within the end cock shall prevent any unacceptable loss of air. The

allowable loss of air shall be less than the leakage values when tested in accordance with 5.3.7.

4.3.9 Vacuum withstanding

When the purchaser requires a vacuum withstand, the end cock shall be able to function with a

pressure of 0,75 bar below atmospheric pressure. The leakage is tested in accordance with

5.3.12.
---------------------- Page: 14 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
4.3.10 Pneumatic shocks

The components shall be able to resist the pneumatic shocks to which the cock is subject when

opening quickly. This requirement is tested in accordance with 5.3.6.
4.4 Constructional characteristics
4.4.1 External appearance

The external surfaces of the end cock shall be free of sharp edges which could be a danger to

those persons handling the cock or to other equipment in the proximity of the end cock. This

requirement shall be checked while testing the other constructional features in accordance with

5.3.2.
4.4.2 Connections
1/4

The body of the end cock shall have an internal thread G1i-EN ISO 228-2 or G1 i-EN ISO 228-2,

for connection to the brake or reservoir pipe. The end of the body adjacent to the internal

threads shall be of hexagonal form or have flats (see Annex A). If required by the Purchaser, the

body end can have a flat sealing face for « Flange » type of connections. The body of the end cock

shall have an external thread for connection to the coupling hose in accordance with Annex A,

and checked in accordance with 5.3.2.
4.4.3 Space envelope

The end cock shall be contained in the space envelope in Annex A. Sizes are checked in

accordance with 5.3.2.

The cock handle shall be designed according to ergonomic principles taking into account, that

the operator wears protective gloves. There shall be enough space between the handle and the

vent housing to prevent risk of crushing.
4.4.4 Mechanical shocks

The end cock body shall withstand a mechanical shock with an energy value equal to 120 J. This

characteristic is tested in accordance with 5.3.11.
4.4.5 Resistance to torque

When a torque of 200 N∙m is applied to the handle, no permanent deformation shall occur to

any part of the end cock. This requirement is tested in accordance with 5.3.14.
4.4.6 Life expectancy

The life expectancy shall be such that the end cock is able to function satisfactorily after

10 000 cycles in accordance with 5.3.8.
5 Type test methods
5.1 Sampling for type test

For the type test, a sample of ten end cocks produced under the condition of series production

shall be tested.
---------------------- Page: 15 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
5.2 Test requirements

All the type tests shall be performed at 20 °C ± 5°C and the quality of the compressed air

equivalent to class 4-4-5 specified in ISO 8573-1:2001. All pressures quoted are gauge

pressures, not absolute pressures. The tests marked with a « * » shall be performed additionally

at T2 specified in the EN 50125-1 and at a wider temperature range if otherwise agreed

between purchaser and supplier (pass/fail criteria for this case shall be agreed between

purchaser and supplier).
5.3 Test procedure
5.3.1 Principle

The tests shall be carried out in the order shown in Table 1. This table is designed to avoid

unnecessary test repetitions.
Table 1 —Operations to carry out for qualification
Tests Corresponding Tested end cock number
subclauses of this
document
1 2 3 4 5 6 7 8 9 10
Physical and geometrical 5.3.2 X X X X X X X X X X
characteristics
Measurement of the fall time 5.3.4 X
Hydraulic test (water pressure) 5.3.5 X
Vibration 5.3.10 X
Resistance to shock test 5.3.11 X
Measurement of the operating 5.3.3 X X X X
torque
Measurement of the torque drift 5.3.9 X X X X
Pneumatic test of the isolating 5.3.7 X X X X
device
Endurance 5.3.8 X
Operating test with flow 5.3.6 X X X
Measurement of the operating 5.3.3 X X
torque
Pneumatic test of the isolating 5.3.7 X X X X X
device
Vacuum test 5.3.12 X
Corrosion test 5.3.13 X
Resistance to torque 5.3.14 X
Examination 5.3.15 X X
Tests shall be performed at 20 ° ± 5 °C and extreme temperatures.
---------------------- Page: 16 ----------------------
SIST EN 14601:2005+A2:2022
EN 14601:2005+A2:2021 (E)
5.3.2 Check of physical and geometrical characteristics
5.3.2.1 Procedure

The requirement of 4.3.1, 4.3.2 and 4.3.3 4.3.5, shall be checked using appropriate measuring

instruments, in accordance with the specification. Unless specified in the text the threaded parts

shall be checked by GO/NO-GO gauges.
5.3.2.2 Pass/fail criteria
The result shall be satisfactory if all the specified characteristics are met.
5.3.3 Measurement of the operating torque
5.3.3.1 Procedure

The operating torque is measured with a torque wrench, which can be equipped with

extensometric gauges connected to reading equipment. The value of the torque is taken into

consideration after four cycles « open - closed - open ». The duration of one cycle is 2 s. The test

shall be carried out with temperature of – 40 °C + 20 °C, + 35 °C, or other specified extreme

temperatures successively without test pressure and with static pressure of .
10 bar
−0,5
5.3.3.2 Pass/fail criteria
The torque value shall be in accordance with 4.3.5.
5.3.4 Measurement of the pressure fall time
5.3.4.1 Measurement of the pressure fall time through end cock
5.3.4.1.1 General

The test consists of Operation 1 for calibration of the test assembly and Operation 2 for

measuring the time to bleed - off a reservoir of 100 l charged to a pressure of 10 bar, using a test

assembly as shown in Figure 6.
5.3.4.1.2 Preliminary phase for Operations 1 and 2

The isolating cock (1) is closed, and the 100 l reservoir is charged by opening the isolating cock

(4), and closing it when the reservoir is charged to 10 bar.
5.3.4.1.3 Operation 1
Open isolating cock (1) and measure the
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.