BS 7965:2013 PDF

Scope: This British Standard gives recommendations and guidance on the selection, installation, operation and calibration of transit time ultrasonic flowmeters (USMs) for industrial gas applications (including flare gas). It is applicable only to those devices in which the entire gas stream flows through the body of the USM and the transducers (wetted or invasive type), or a wetted interface, are in contact with the fluid. This includes full-bore/reduced-bore and insertion type meters employing direct or reflective paths. It is also applicable to "dirty gases", i.e. those contaminated with solids and/or liquids in sufficiently small quantities, depending upon the application. It is not applicable to clamp-on/externally mounted, domestic or stack/chimney (combustion exhaust) meters.

BS 7965:2013 Referenced Document

BS 7834 Specification for turbine meters used for the measurement of gas flow in closed conduits
BS EN ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories

2013 BS 7965:2013 Guide to the selection, installation, operation and calibration of diagonal path transit time ultrasonic flowmeters for industrial gas applications
2009 BS 7965:2009 Guide to the selection, installation, operation and calibration of diagonal path transit time ultrasonic flowmeters for industrial gas applications
2000 BS 7965:2000 The selection, installation, operation and calibration of diagonal path transit time ultrasonic flowmeters for industrial gas applications