BS 1042-1-1.5:1997 Measurement of fluid flow in closed conduits. Pressure differential devices - Guide to the effect of departure from the conditions specified in BS EN ISO 5167-1
Withdrawn
This Section of BS 1042 provides guidance to assist in
estimating the flowrate when using pressure
differential devices constructed or operated outside the
scope of BS EN ISO 5167-1.
It should not be inferred that additional tolerances or
corrections can necessarily compensate for the effects
of deviating from the standard. The information is
given, in the first place, to indicate the degree of care
necessary in the manufacture, installation and
maintenance of pressure differential devices by
describing some of the effects of non-conformity to the
requirements; and in the second place, to permit those
users who may not be able to comply fully with the
requirements to assess, however roughly, the
magnitude and direction of the resulting error in
flowrate.
Each variation dealt with is treated as though it were
the only one present. Where more than one is known
to exist, there may be unpredictable interactions and
care has to be taken when combining the assessment
of these errors. If there is a significant number of
errors, means of eliminating some of them must be
considered. The variations included in this standard
are by no means complete and relate largely to
examples with orifice plates. There are, no doubt,
many similar examples of installations not conforming
to BS EN ISO 5167-1 for which no comparable data
have been published. Such additional information from
users, manufacturers and any others may be taken into
account in future revisions of this Section of BS 1042.
BS 1042-1-1.5:1997 Measurement of fluid flow in closed conduits. Pressure differential devices - Guide to the effect of departure from the conditions specified in BS EN ISO 5167-1
