Figure 1 Flow Schematic - Michell Instruments Condumax II User Manual

INTRODUCTION
Hydrocarbon dew-point analysis pressure is adjusted by a heated pressure regulator in
the range up to 35 barg (500 psig), but it is typical for measurements to be made at
the cricondentherm condition of 27 barg (400 psig), where the highest HC dew-point
temperature will be detected on the retrograde phase envelope.
The water dew point is measured at full pipeline pressure, to determine the highest
water dew point for the gas sample being analyzed.
The complete Condumax II Hydrocarbon Dew-Point Analyzer Sampling System can be
located close to the gas sample take-off point in a potentially explosive environment -
suitable for IEC Zone 1 or 2 hazardous area, NEC Class 1, Division 1, Groups B, C, D.
A set of 3 (2m each) hoses is provided to allow connection to the sample, exhaust and
fi lter drain/bypass, via a ¼" NPT(M) fi tting. Standard fi tting assembly practices should
be used. NOTE: Sealing tape must be used to seal fi tting to the sample tapping
point. The use of thread sealants is NOT recommended when making measurements
with this type of dew-point analyzer, as contamination of the measurement instruments
is likely to occur from sealant ingestion into the sampling system.
!
!
All sample gas wetted metallic parts are constructed from AISI 316L stainless steel with
Viton soft parts that comply with the NACE standard ANSI/NACE-MR0175/ISO-15156
(latest edition). Tube fi ttings are twin ferrule compression type.
SAMPLE GAS INLET
(100 BARG MAX)
Hydrocarbon dew point - measured at cricondentherm condition
Water dew point - measured at line pressure
2
The sampling system is designed for temporary installation and
should not be left unattended.
Operator attendance is required at all times. Prolonged periods
of operator absence are not advised.
During operation the sampling system must be located in an
environment with a temperature of at least +10ºC (+18°F)
above the highest envisaged dew-point temperature, both
hydrocarbon at cricondentherm and water at line pressure.
It is not advised to operate the analyzer in excessive wind, rain
PG1
PR1
CONDUMAX II
F1
HC DEW POINT
WATER DEW POINT
Figure 1
Condumax II Transportable
Sampling System User's Manual
and snow.
ANALYZER NRV1 MV1
NV1
Flow Schematic
97438 Issue 1.3, March 2016
SAMPLE GAS
OUTLET
FM1
BYPASS GAS
OUTLET