to the log distance of the pipeline. Each blue dot/point illustrates
the yield strength per joint measured by the new ILI technology
for RoMat services. The red lines mark the specified minimum yield
strength (SMYS) according to the known operator records. The gaps
between are unknown implying that a grade of X24 (24 000 SMYS)
has to be taken for MAOP calculation (according to PHMSA CFR 49).
The results of the ILI performance test correspond very
precisely with the in-field verification value required by API 1163
(pink cross) and the SMYS according to operator records (red).
Since only one dig validates the whole section of the pipeline,
it is sufficient to perform only a few field verifications (orange dot)
in order to confirm the grades for the whole pipeline.
The role of pipeline integrity management
This service extends ‘classic’ integrity management programmes
(IMP) where primarily threats from flaws, external forces and similar
are addressed. With the latest achievements in data integration and
NDT, the pipe properties and MAOP validation can be included
(Figure 6).
Through ROSEN’s extended integrity management programme
pipeline operators will benefit in various ways;
)
)
MAOP validation in compliance with PHMSA 49CFR Section
192.619(a).
)
)
Upgrading opportunities for SMYS gaps in pipe-tallies.
)
)
Accurate quantitative information usable for risk assessments.
)
)
SMTS and SMYS validation for new erected pipelines.
In regards to the new regulations, ROSEN provides a powerful
inline inspection service to assess the pipe properties and validate
the MAOP in a pipeline.
Further engineering critical assessments have to be conducted,
as for example, extra ILI programmes according to PHMSA codes
(49CFR) (IVP Chart), which can be run in the same ILI batch. The
new inspection technology for RoMat services enhances ILI and
ensures the integrity of the pipeline system from validating pipeline
manufacturing parameters to confirming the current state of
the pipeline system with regards to classical pipeline threats to
integrity, for example corrosion, mechanical damage and cracking,
etc.
The conclusion
Conventional ILI technologies are capable of partially delivering
relevant information for MAOP calculation already. ROSEN’s
integrated approach – providing integrity, engineering and
a completely new RoMat inspection service delivering
groundbreaking pipeline property information – is capable of
fulfilling the requirements of MAOP validation comprehensively and
as a whole.
The application of ILI for pipe grade characterisation and its
combination with existing pipe property data extends the role of ILI
in pipeline integrity management. With the ILI integrity management
system described herein an answer has been found for the growing
demand for pipeline records that are verifiable, traceable and
complete.
References
1.
KIEFNER, J. and ROSENFELD, M., ‘The Role of Pipeline Age in Pipeline Safety’, Final
Report No. 2012.03, INGAA Foundation, October 2012.
Since 1953
R
uining
H
olidays
Even the smallest bare metal exposure or
“holiday”
in nonconductive coating on a
pipeline or inside a vessel will
GROW
to
cause
BIG
corrosion problems down the road.
Since 1953,
Pipeline Inspection Company
has been ruining holidays before they ruin
the integrity of your coatings with fast and
innovative SPY
®
holiday detection equipment.
Visit our website to see our full line!
Pipeline Inspection Company
Phone : (713) 681-5837
Email :
