Pneumatic fluid power — Assessment of component reliability by testing — Part 3: Cylinders with piston rod

ISO19973-3:2007 provides test procedures for determining reliability of pneumatic cylinders with piston rod by testing and the methods of reporting the results of testing. The general test conditions and the calculation method provided in Part 1 of ISO 19973 apply to the first failure without repairs, but exclude outliers. The lifetime of pneumatic cylinders is usually given in number of cycles or in kilometres. Therefore, whenever the term "time" is used in this part of ISO19973-3:2007, this variable is to be understood as cycles or kilometres. ISO19973-3:2007 also specifies test equipment and threshold levels for tests to determine the reliability of pneumatic cylinders with piston rods, both single-acting and double-acting. ISO19973-3:2007 is intended to be applied to pneumatic piston rod cylinders that conform to ISO 6430, ISO 6432, ISO 15552 and ISO 21287; however, pneumatic piston rod cylinders that do not conform to these International Standards but are used in the same range of operating conditions can be tested in accordance with one of the classes defined inISO19973-3:2007. It is necessary that any deviation from ISO19973-3:2007 be documented in the test report.

Transmissions pneumatiques — Évaluation par essais de la fiabilité des composants — Partie 3: Vérins avec tiges de piston

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Status
Withdrawn
Publication Date
29-Jul-2007
Withdrawal Date
29-Jul-2007
Current Stage
9599 - Withdrawal of International Standard
Completion Date
01-Sep-2015
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ISO 19973-3:2007 - Pneumatic fluid power -- Assessment of component reliability by testing
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INTERNATIONAL ISO
STANDARD 19973-3
First edition
2007-08-01

Pneumatic fluid power — Assessment of
component reliability by testing —
Part 3:
Cylinders with piston rod
Transmissions pneumatiques — Évaluation par essais de la fiabilité des
composants —
Partie 3: Vérins avec tiges de piston




Reference number
ISO 19973-3:2007(E)
©
ISO 2007

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ISO 19973-3:2007(E)
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ii © ISO 2007 – All rights reserved

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ISO 19973-3:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Symbols and units. 2
5 Test equipment . 2
6 Test conditions . 2
7 Test procedure . 6
8 Threshold levels. 6
9 Data analysis . 7
10 Test report . 8
11 Identification statement (reference to this part of ISO 19973). 8

© ISO 2007 – All rights reserved iii

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ISO 19973-3:2007(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 19973-3 was prepared by Technical Committee ISO/TC 131, Fluid power systems.
ISO 19973 consists of the following parts, under the general title Pneumatic fluid power — Assessment of
component reliability by testing:
⎯ Part 1: General procedures
⎯ Part 2: Directional control valves
⎯ Part 3: Cylinders with piston rod
⎯ Part 4: Pressure regulators
iv © ISO 2007 – All rights reserved

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ISO 19973-3:2007(E)
Introduction
In pneumatic fluid power systems, power is transmitted and controlled through a gas under pressure within a
circuit. Pneumatic fluid power systems are composed of components and are an integral part of various types
of machines and equipment. Efficient and economical production requires highly reliable machines and
equipment. Within the ISO 19973 series, this Part 3 is intended to provide requirements and test conditions
that permit the assessment of the inherent reliability of pneumatic cylinders with piston rod.
It is necessary that machine producers know the reliability of the components that make up their machine’s
pneumatic fluid power system. Knowing the reliability characteristic of the component, the producers can
model the system and make decisions on service intervals, spare parts' inventory and areas for future
improvements.
There are three primary levels in the determination of component reliability:
a) preliminary design analysis: finite element analysis (FEA), failure mode and effect
analysis (FMEA);
b) laboratory testing and reliability modelling: physics of failure, reliability prediction, pre-production
evaluation;
c) collection of field data: maintenance reports, warranty analysis.
Each level has its application during the life of a component. A preliminary design analysis is useful to identify
possible failure modes and eliminate them or reduce their effect on reliability. When prototypes are available,
in-house laboratory reliability tests are run and initial reliability can be determined. Reliability testing is often
continued into the initial production run and throughout the production lifetime as a continuing evaluation of
the component. Collection of field data is possible when products are operating and data on their failures are
available.

© ISO 2007 – All rights reserved v

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INTERNATIONAL STANDARD ISO 19973-3:2007(E)

Pneumatic fluid power — Assessment of component reliability
by testing —
Part 3:
Cylinders with piston rod
1 Scope
This part of ISO 19973 provides test procedures for determining reliability of pneumatic cylinders with piston
rod by testing and the methods of reporting the results of testing. The general test conditions and the
calculation method provided in Part 1 of ISO 19973 apply to the first failure without repairs, but exclude
outliers.
The lifetime of pneumatic cylinders is usually given in number of cycles or in kilometres. Therefore, whenever
the term “time” is used in this part of ISO 19973, this variable is to be understood as cycles or kilometres.
This part of ISO 19973 also specifies test equipment and threshold levels for tests to determine the reliability
of pneumatic cylinders with piston rods, both single-acting and double-acting.
This part of ISO 19973 is intended to be applied to pneumatic piston rod cylinders that conform to ISO 6430,
ISO 6432, ISO 15552 and ISO 21287; however, pneumatic piston rod cylinders that do not conform to these
International Standards but are used in the same range of operating conditions can be tested in accordance
with one of the classes defined in Tables 1 and 2 of this part of ISO 19973. It is necessary that any deviation
from this part of ISO 19973 be documented in the test report.
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 1000, SI units and recommendations for the use of their multiples and of certain other units
ISO 1219-1, Fluid powe
...

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