Nace CP 1, Course Manual

Page: 278 / 535

RP0169-2002
NACE International 7
5.1.2.1.14 Resistance to changes and
deterioration during aboveground storage and
long-distance transportation.
5.1.2.2 Typical factors to consider when selecting
an external pipe coating include:
5.1.2.2.1 Type of environment;
5.1.2.2.2 Accessibility of piping system;
5.1.2.2.3 Operating temperature of piping
system;
5.1.2.2.4 Ambient temperatures during
application, shipping, storage, construction,
installation, and pressure testing;
5.1.2.2.5 Geographical and physical location;
5.1.2.2.6 Type of external coating on existing
pipe in the system;
5.1.2.2.7 Handling and storage;
5.1.2.2.8 Pipeline installation methods;
5.1.2.2.9 Costs; and
5.1.2.2.10Pipe surface preparation
requirements.
5.1.2.3 Pipeline external coating systems shall be
properly selected and applied to ensure that
adequate
bonding is obtained. Unbonded
coatings can create electrical shielding of the
pipeline that could jeopardize the effectiveness of
the cathodic protection system.
5.1.3 Information in this section is primarily by
reference to other documents. It is important that the
latest revision of the pertinent reference be used.
5.1.3.1 Table 1 is a listing of types of external
coating
systems, showing the appropriate
references for material specifications and
recommended practices for application.
5.1.3.2 Table 2 is a grouping of references for
general use during installation and inspection,
regardless of coating type.
5.1.3.3 Table 3 is a list of external coating system
characteristics related to environmental conditions
containing suggested laboratory test references for
various properties.
5.1.3.4 Table 4 is a list of external coating system
characteristics related to design and construction,
with recommended laboratory tests for evaluating
these properties.
5.1.3.5 Table 5 lists the references that are useful
in field evaluation of external coating systems after
the pipeline has been installed.
5.2 Storage, Handling, Inspection, and Installation
5.2.1 Storage and Handling
5.2.1.1 Coated pipe to be stored should be
protected
internally and externally from
atmospheric corrosion and coating deterioration.
5.2.1.2 Damage to coating can be minimized by
careful handling and by using proper pads and
slings.