BS 1042-2.3:1984
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Measurement of fluid flow in closed conduits. Velocity area methods Methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current-meters or Pitot static tubes
Hardcopy , PDF
31-08-2008
English
31-05-1984
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National foreword
Committees responsible
Methods
0. Introduction
1. Scope and field of application
2. References
3. Symbols
4. Principle
5. Choice of measuring plane
6. Devices for improving flow conditions
7. Measurement of local velocities
8. Determination of mean flow velocity
9. Accuracy of flow-rate estimation
Annexes
A. Detection and removal of regular pressure
fluctuations
B. Damping of manometers
C. Calculation of Pitot static tube locations for
method B
D. Corrections to be applied when a Pitot static tube
is used
E. Corrections to be applied when a current-meter is
used
F. Errors due to non-axisymmetrical velocity
distribution
Figures
1. Installation of straightener
2. Type A - Zanker straightener
3. Type B - Sprenkle straightener
4. Type C - Tube bundle straightener
5. Type D - AMCA straightener
6. type E - Etoile straightener
7. Wedge-shaped yaw probe
8. Cylindrical yaw probe
9. k psi versus psi for typical Pitot static tubes
10. Maximum permissible size of Pitot static tube
in method B
11. Examples of directional response of different
types of current-meters
12. Non-return valve
13. Arrangement of non-return valves
14. Device for checking damping of pressure
fluctuations in the leads to the manometer
15. Radial positions of Pitot static tube in swirling
flow when method B is used
16. Pitot static tube
17. Example of the effect of axial pulsations on
current meter velocity estimation
18. Example of the effect of tangential pulsations on
current meter velocity estimation
Gives velocity area methods for measuring flow and details the precautions to be taken and the corrections to be made. Also describes the additional uncertainties which are introduced when a measurement in asymmetric or swirling flow has to be made.
| Committee |
CPI/30
|
| DevelopmentNote |
Supersedes BS 1042-2(1964) (07/2004) Supersedes 82/25605 DC. (06/2005)
|
| DocumentType |
Standard
|
| Pages |
28
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| UNE-EN 12697-11:2012 | Identical |
| UNE-EN ISO 24034:2006 | Identical |
| BS 4773-1:1971 | Methods for testing and rating air terminal devices for air distribution systems Aerodynamic testing |
| BS 3986-1:1998 | Methods of test for drying performance of agricultural grain dryers General procedures and limited requirements for wheat |
| BS 4876:1984 | Specification for performance requirements for domestic flued oil burning appliances (including test procedures) |
| BS 6199-1.2:1991 | Measurement of liquid flow in closed conduits using weighing and volumetric methods. Weighing method Procedures for checking static weighing systems |
| BS 1042-2.4:1989 | Measurement of fluid flow in closed conduits. Velocity area methods Method of measurement of clean water flow using current meters in full conduits and under regular flow conditions |
| BS 599:1966 | Methods of testing pumps |
| BS 848-1:1980 | Fans for general purposes Methods of testing performance |
| BS 5990:1981 | Specification for direct gas fired forced convection air heaters for space heating (60 kW up to 2 MW input): safety and performance requirements (excluding electrical requirements) (2nd family gases) |
| BS 4979-1:1973 | Methods for testing and rating air control devices for air distribution systems Aerodynamic testing of constant flow rate assemblies without a heat exchanger |
| BS 893:1978 | Method for the measurement of the concentration of particulate material in ducts carrying gases |
| BS 5991:1983 | Specification for indirect gas fired forced convection air heaters for space heating (60 kW up to 2 MW input): safety and performance requirements (excluding electrical requirements) (2nd family gases) |
| BS EN ISO 6817:1997 | Measurement of conductive liquid flow in closed conduits. Method using electromagnetic flowmeters |
| BS 3986(1991) : 1991 AMD 9836 | METHODS OF TEST FOR DRYING PERFORMANCE OF AGRICULTURAL GRAIN DRYERS - GENERAL PROCEDURES AND LIMITED REQUIREMENTS FOR WHEAT |
| ISO 3354:2008 | Measurement of clean water flow in closed conduits — Velocity-area method using current-meters in full conduits and under regular flow conditions |
| BS 3680-8C:1980 | Measurement of liquid flow in open channels. Measuring instruments and equipment Calibration of rotating-element current-meters in straight open tanks |
| ISO/TR 3313:1992 | Measurement of pulsating fluid flow in a pipe by means of orifice plates, nozzles or Venturi tubes |
| BS 1042-2.1:1983 | Measurement of fluid flow in closed conduits. Velocity area methods Method using Pitot static tubes |
| BS 5844:1980 | Methods of measurement of fluid flow: estimation of uncertainty of a flow-rate measurement |
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