AS ISO ASME 14414:2020 pdf free download – Pump system energy assessment
5.1.3  Level 2 assessments
Level 2 assessments shall be performed when it is clear that the observed operating conditions are representative for the operation of the systems and the changes in operating condition are small or non-existent. Level 2 assessments shall be performed using data taken from the facility information systems, in paper or electronic format, or by using portable measuring devices. The measurements shall cover a limited amount of time, thus giving a snapshot of the operating conditions at the time of measurement.
5.1.4  Level 3 assessments
Level 3 assessments shall be made on pumps systems where conditions vary substantially over time. For such systems, the assessment team shall record the system performance data over the time period or capture data at the extreme duty points. This activity shall be associated with more extensive use of in situ monitoring to ensure that the operating conditions can be accurately determined at the various duty points (i.e. design point, normal, rated, maximum and minimum flow rates). The monitoring shall be made by connecting transducers to data logging equipment and recording the sensor output, or in some facilities, where historical information is stored, the relevant information should be downloaded from the facility information system.
5.2  Walk through
A walk through is required for level 2 and 3 assessments and may be required for some pumping systems undergoing a level 1 assessment.
The walk through shall entail examination throughout ensuring that the information provided to the assessment team reflects the configuration of the existing systems.
For the pumping systems undergoing level 2 and 3 assessments, after the walk through is completed,the information listed in 5.5 shall be collected using the methodologies specified in 5.6.
All components of the system shall be considered and pertinent information such as valve locations,locations of available pressure taps, flow meters, valve positions, etc. should be noted.
During the walk through, information about the control methods for the different systems such as valve settings should be noted.
The assessment team shall also identify any existing conditions that are often associated with inefficient pumping system operation.
These conditions may be identified through the following potential indicators:
a) pumping systems where significant throttling takes place 1) ;
b) pumping systems with recirculation of flow used as a control scheme;
c) pumping systems with large flow or pressure variations;
d) systems with multiple pumps where the number of operated pumps is not adjusted in response to changing conditions;
e) systems serving multiple end uses where a minor user sets the pressure requirements 1) ;
f) cavitating equipment 1) ;
g) high vibration and/or noisy pumps, motors or piping 1) ;
h) equipment with high maintenance requirements (low MTBF) 1) ;
i) systems for which the functional requirements have changed with time, but the pumps have not;
j) worn, eroded, corroded, distorted or broken impellers/diffusers/vanes or wear rings and casings(if available, this information can be provided by facility staff);
k) clogged pipelines or pumps (usually requires historical data to be discovered);
l) systems which have a low pumping system efficiency indicator (for information, see Annex H);
m) seized valves or leaking recirculation valves;
n) sealing systems, especially high temperature, requiring cooling (see B.4.3);
o) lack of proper inlet screening, where appropriate.