Field Hydrostatic Pressure Testing Procedures - Emerson Rosemount 3812 Maintenance And Troubleshooting Manual

Routine Maintenance
April 2022
CAUTION
ESCAPING FLUIDS HAZARD
The purchaser of the meter is responsible for the selection of Emerson components/seals
and materials compatible with the chemical properties of the measurement fluid.
Failure to select suitable meter components/seals may cause escaping fluids, resulting in
injury to personnel or equipment damage.
Consult your Emerson Sales and Service representative to ensure you purchase the correct
components and seals for your application, below safety message.
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Field hydrostatic pressure testing procedures

The Rosemount 3812 Liquid Ultrasonic Flow Meter can be field hydrostatic tested without
any special preparations or disassembly. The transducers are not exposed to the process
pressure and can remain installed in the meter.
The liquid ultrasonic meter pressure containing parts include, but are not limited to the
transducer housings. The Hydrostatic test is verification of the pressure containing
capability of the liquid ultrasonic meter pressure containing parts and seals. Each
Rosemount Liquid Ultrasonic Flow Meter is successfully hydrostatic pressure tested prior
to shipping from the factory.
The maximum field hydrostatic pressure test must be limited to 1.5 times the stamped
maximum working pressure. The maximum working pressure is stamped on the meter ID
tag.
CAUTION
LEAKAGE OR PRESSURE CONTAINING PARTS FAILURE
Use precautions to eliminate hazards to personnel in the event of leakage or failure of the
liquid ultrasonic meter pressure containing parts or failure of the test equipment and to
prevent over-pressurization during the test procedure.
Failure to comply may result in injury to personnel or cause damage to the equipment.
NOTICE
A copy of this test is available by contacting Emerson Customer Support. Please provide
the body serial number when requesting a copy of the test report. The body serial number
is located on the downstream flange to the left of the hoist ring hole (when looking at the
flange face).
Emerson Customer Support contact information is located on the back page of the
manual.
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Maintenance and Troubleshooting Manual
Emerson.com/Rosemount
00809-0100-3812