TDW PIG-SIG V, Operating And Maintenance Instructions Manual

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Section II – Introduction
1.0 Purpose
2.0 Description
1.0 PURPOSE
This manual is designed to provide the operator with
factory recommended operation and maintenance
instructions for safe and effective use of the TDW
PIG-SIG V Scraper Passage Indicator.
Read the entire manual for instructions on
installation, operation, and preventative maintenance
for the PIG-SIG V:
•
On a plug assembly already set in a pipeline.
• On a line under pressure.
•
On a line not under pressure.
2.0 DESCRIPTION
The TDW Scraper Passage Indicator is a device that
is installed on a pipeline to detect the passage of a
pig or sphere.
The PIG-SIG V indicator has a trigger that extends
into the pipeline through a welded fitting that has
been tapped. When a pig passes, the trigger is
tripped, activating the signaling mechanism.
Signaling mechanisms available include a flag
indicator, electrical indicator, and a combination flag
and electrical indicator. PIG-SIG V indicators are
interchangeable with all PIG-SIG indicators now in
the field. This makes it possible to use these units as
conversion kits as well as complete PIG-SIG
indicators. The PIG-SIG V indicator is weather-proof,
corrosion-resistant and the flag indicator offers high
visibility. All parts of the standard PIG-SIG V
construction are manufactured from stainless steel.