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Extent of Inspections On Small-Bore Piping, Dead Legs, Auxiliary Piping, and Threaded Connections Small Bore Piping (SBP Deadleg Inspection

Small bore piping, dead legs, auxiliary piping, and threaded connections should be inspected according to requirements for primary process piping. Dead legs with chemical mechanical locks should be tracked separately, and risk assessments can help determine which dead legs pose higher risks. Inspections of secondary small bore piping are either the same as for primary piping if class 1 or 2, or optional if class 3 or 4, depending on corrosion potential. Infrared thermography may help locate liquid interfaces in dead legs.

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Muhammad Bilal
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291 views2 pages

Extent of Inspections On Small-Bore Piping, Dead Legs, Auxiliary Piping, and Threaded Connections Small Bore Piping (SBP Deadleg Inspection

Small bore piping, dead legs, auxiliary piping, and threaded connections should be inspected according to requirements for primary process piping. Dead legs with chemical mechanical locks should be tracked separately, and risk assessments can help determine which dead legs pose higher risks. Inspections of secondary small bore piping are either the same as for primary piping if class 1 or 2, or optional if class 3 or 4, depending on corrosion potential. Infrared thermography may help locate liquid interfaces in dead legs.

Uploaded by

Muhammad Bilal
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Extent of Inspections on Small-bore Piping, Dead legs, Auxiliary Piping, and Threaded

Connections

Small Bore Piping Auxiliary Piping Threaded-connection Inspection and


Deadleg Inspection
(SBP) Inspection Mitigation

Inspection of threaded connections


Inspection of auxiliary
Inspected same as other Dead legs with CMLs should be should be according to the
SBP associated with
piping for primary process tracked in a separate piping requirements listed above for small-
instruments and
piping circuit from the mainline piping bore and auxiliary
machinery is optional
Piping.

Inspected different if piping Dead legs may be combined Threaded connections are often
piping classification
for secondary process piping into one circuit subject to fatigue damage

Risk assessment can be useful in


Class 1 and 2 secondary SBP
determining which piping environmental or
same requirements as
system dead legs may be a fatigue cracking
primary process
higher

potential for corrosion


Class 3 and Class 4 secondary accelerated corrosion above based on experience
SBP is optional and below liquid interfaces with adjacent primary
systems

potential for CUI;


Insulated SBP the same Infrared thermography may be potential for fatigue,
inspection practices for CUI useful for locating liquid erosion and/or
as the primary piping interfaces in deadlegs corrosion on
thermowells
Extent of Inspections on Small-bore Piping, Dead legs, Auxiliary Piping, and Threaded
Connections

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