BS 7834:1995

Committees responsible
National foreword
Specification
1. Scope
2. Normative references
3. Definitions and symbols
4. Principle of the method of measurement
5. Flowrates
6. Meter construction
7. Pressure testing
8. Performance characteristics
9. Output and readout
Annexes
A. (informative) Recommendations for use
B. (informative) Other meter performance characteristics
C. (informative) Data computation and presentation
D. (informative) Field checks
E. (informative) Perturbations
Tables
1. Symbols and subscripts
2. Maximum flowrates and nominal sizes
3. Strength test duration
E.1 Relationship of DN1 to DN
Figures
E.1 Piping configurations for tests at low level perturbation
E.2 Location of half-area opening for tests at high level
     perturbation
E.3 Flow conditioner to damp out high level perturbation
E.4 Alternative flow condition configuration to damp out high
     level perturbation
E.5 Meter dimensions defining similarity for various size
     meters

Specifies dimensions, ranges, construction, performance, calibration and output characteristics of turbine meters for gas flow measurement (but not for fuel gas for fiscal purposes). Also deals with installation conditions and leakage and pressure testing.

This International Standard specifies dimensions, ranges, construction, performance, calibration and output characteristics of turbine meters for gas flow measurement.

It also deals with installation conditions, leakage testing and pressure testing and provides a series of informative Annex A to Annex E including recommendations for use, field checks and perturbations of the fluid flowing.

In many countries, some or all of the items covered by this International Standard are subject to mandatory regulations imposed by the laws of these countries. In cases where conflict exists between such mandatory regulations and this International Standard, the former shall prevail.