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BS ISO 6358-1:2013+A2:2026 Pneumatic fluid power. Determination of flow-rate characteristics of components using compressible fluids - General rules and test methods for steady-state flow, 2026
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 3.1 Terms and definitions related to pressures
- 3.2 Terms and definitions related to temperature
- 3.3 Terms and definitions related to flow
- 3.4 Terms and definitions related to flow-rate characteristics
- 3.5 Miscellaneous terms and definitions
- 4 Symbols and units
- 5 Test installation [Go to Page]
- 5.1 Test circuit for constant upstream pressure test
- 5.2 Test circuit for variable upstream pressure test
- 5.3 General requirements
- 5.4 Pressure-measuring tubes (items 6 and 10)
- 5.5 Transition connectors (items 7 and 9)
- 5.6 Special requirements
- 6 Test procedures [Go to Page]
- 6.1 Test conditions [Go to Page]
- 6.1.1 Test fluid
- 6.1.2 Checks
- 6.1.3 Test measurements
- 6.2 Measuring procedures [Go to Page]
- 6.2.1 Requirements for testing to publish catalogue ratings
- 6.2.2 Selection of measuring procedure
- 6.2.3 Measuring procedures for discharge test (See Figure 1)
- 6.2.4 Measuring procedures for charge test (See Figure 2)
- 6.3 Calculation of characteristics [Go to Page]
- 6.3.1 Sonic conductance, C
- 6.3.2 Critical back-pressure ratio, b, and subsonic index, m
- 6.3.3 Pressure dependence coefficient, Kp
- 7 Presentation of test results
- 8 Identification statement (reference to this part of ISO 6358)
- Annex A (normative) Alternative test procedure
- Annex B (informative) Flowmeter calibration [Go to Page]
- Annex sec_C
- Annex sec_C.1
- Annex sec_C.2
- Annex sec_C.3
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- Figure fig_C.1
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- Annex sec_C.4
- Annex sec_C.4.1
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- Annex sec_C.4.2
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- Annex sec_C.5
- Table tab_C.1
- Annex D (informative) Observations on error in test results
- Annex E (informative) Equations and graphical representations of flow-rate characteristics
- Annex F (informative) Use of practical units
- Annex G (informative) Results of testing performed on commercially available pneumatic components
- Annex H (informative) Procedures for calculating critical back-pressure ratio, b, and subsonic index, m, by the least-square method using the Solver function in Microsoft Excel
- Annex I (informative) Method for evaluating the flow ability of pneumatic components using “effective conductance, Ca”
- Bibliography [Go to Page]
