Specifications

MONPAC
This is an expert system for evaluating the condition of metal pressure systems and tanks based on over 2000
tests. Monsanto developed the procedures and applicability, PAC the instrumentation and software. MONPAC is
now widely used in the chemical and oil industries. Benefits of the method are largely seen in the reduced
inspection costs and minimal down time of each vessel resulting from improved information about the plant
condition.
MONPAC is particularly effective on spheres, columns and for tank shell integrity but may be used on complete
process systems. The software returns a colour coding for the severity of emissions, complete with associated
recommendations. Testing is carried out by trained engineers familiar with all MONPAC’s procedures.
Location of defects is made possible using the triangulation method i.e. three sensors and their respective arrival
times to each sensor. Additional software is available on request and can be used in conjunction with MONPAC’s
powerful software base.
VPAC
VPAC enables estimation of through – valve leakage based on measurements made using a PAC model 5131
Valve Leak Detector together with data on the size and valve type and differential pressure. It was developed for
use on refineries, chemical plants and offshore platforms. Primarily the technology is for estimating gas losses,
gas to gas or liquid to gas. Limited leakage is also included in the technology package. The system is virtually
immune to environmental and process noise by virtue of the advanced sensor technology. This ensures that
measurements are easily made on line with no requirement for extensive training of operators.
− Identifies through – valve gas losses.
− Estimates leak rate.
− Totally non – intrusive.
− On – Line measurement.
− Filed Proven by BP.
− 10-Year Database.
− Portable.
− Intrinsically Safe.
− Simple Operation.
− 300 Point Memory.
− PC Loss Calculator.
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