INSTALLING OR REPAIRING PIPE COATING IN THE FIELD EXAM
QUESTIONS AND ANSWERS
If an operator has knowledge that any portion of a buried pipeline is exposed, the exposed portion must
be examined for evidence of external corrosion if the pipe is bare or the coating has deteriorated. -
CORRECT ANSWER✅✅192.459: External Corrosion Control: Examination of Buried Pipeline when
Exposed
If external corrosion requiring remedial action under 192.483 through 192.489 is found, the operator
shall investigate circumferentially and longitudinally beyond the exposed portion (by visual examination,
indirect method, or both) to determine whether additional corrosion requiring remedial action exists in
the vicinity of the exposed portion. - CORRECT ANSWER✅✅192.459: External Corrosion Control:
Examination of Buried Pipeline when Exposed
Any protective coating applied for external corrosion control must be applied on a properly prepared
surface and have sufficient adhesion, ductility, strength, compatibility with supplemental cathodic
protection, low moisture absorption, and high electrical resistance. - CORRECT ANSWER✅✅192.461
External Corrosion Control: Protective Coating
Protective coating must be protected from damage - CORRECT ANSWER✅✅192.461 External Corrosion
Control: Protective Coating
Pipeline Coating - CORRECT ANSWER✅✅is a barrier between the pipe and the electrolytic processes
found in the earth.
An effective pipeline coating system must possess - CORRECT ANSWER✅✅excellent cohesive and
adhesive bond strength to the pipe, be highly resistant to water penetration, and provide good electrical
resistance.
Procedures to Applying Pipeline Coatings - CORRECT ANSWER✅✅Properly cleaned surfaces, priming of
the surface, the best available coating site, proper application of coating materials, handling and storing
of materials, handling of coated surface, and thorough inspection
Properly Cleaned Surfaces - CORRECT ANSWER✅✅Surfaces to be coated must be free of dirt, scale, oil,
grease, and all other materials foreign steel.
, Proper Priming of the Surface - CORRECT ANSWER✅✅Apply sufficient primer if the coating system so
demands, to properly operating dust removal equipment and temperature control equipment for the
surface coated and the material applied is desirable.
At a temporary plant or in the open, as in the case of an over-the-ditch pipe coating operation, -
CORRECT ANSWER✅✅the elimination of dust and moisture that will gather on the structure is an
absolute requirement.
Proper Application of Coating Materials - CORRECT ANSWER✅✅Manufacturers' recommendations
should be followed for application temperature, tensions of wrappers used, spacing, and sequence of
successive layers of film building materials. Cleanliness throughout all phases of this operation is
extremely important
Proper Handling and Storing of Materials - CORRECT ANSWER✅✅This is critical in most materials. Store
materials properly to prevent contamination
Proper Handling of Coated Surface - CORRECT ANSWER✅✅The coated surface must be properly
handled to prevent any damage to the integrity of the coating. The field joint or repair is critical and
proper coating of field repairs and joints provides cathodic protection.
Thorough Inspection - CORRECT ANSWER✅✅All phases of this operation must be scrutinized carefully
to assure compliance with good practices, manufacturers' recommendations, and owners'
specifications.
Durometer - CORRECT ANSWER✅✅measures the hardness of materials
Hygrometer - CORRECT ANSWER✅✅measures the amount of humidity in air or gas
Pyrometer - CORRECT ANSWER✅✅measures the temperature
Pit Gauge - CORRECT ANSWER✅✅measures the depth of a pit and can help the amount of pipe wall
loss
QUESTIONS AND ANSWERS
If an operator has knowledge that any portion of a buried pipeline is exposed, the exposed portion must
be examined for evidence of external corrosion if the pipe is bare or the coating has deteriorated. -
CORRECT ANSWER✅✅192.459: External Corrosion Control: Examination of Buried Pipeline when
Exposed
If external corrosion requiring remedial action under 192.483 through 192.489 is found, the operator
shall investigate circumferentially and longitudinally beyond the exposed portion (by visual examination,
indirect method, or both) to determine whether additional corrosion requiring remedial action exists in
the vicinity of the exposed portion. - CORRECT ANSWER✅✅192.459: External Corrosion Control:
Examination of Buried Pipeline when Exposed
Any protective coating applied for external corrosion control must be applied on a properly prepared
surface and have sufficient adhesion, ductility, strength, compatibility with supplemental cathodic
protection, low moisture absorption, and high electrical resistance. - CORRECT ANSWER✅✅192.461
External Corrosion Control: Protective Coating
Protective coating must be protected from damage - CORRECT ANSWER✅✅192.461 External Corrosion
Control: Protective Coating
Pipeline Coating - CORRECT ANSWER✅✅is a barrier between the pipe and the electrolytic processes
found in the earth.
An effective pipeline coating system must possess - CORRECT ANSWER✅✅excellent cohesive and
adhesive bond strength to the pipe, be highly resistant to water penetration, and provide good electrical
resistance.
Procedures to Applying Pipeline Coatings - CORRECT ANSWER✅✅Properly cleaned surfaces, priming of
the surface, the best available coating site, proper application of coating materials, handling and storing
of materials, handling of coated surface, and thorough inspection
Properly Cleaned Surfaces - CORRECT ANSWER✅✅Surfaces to be coated must be free of dirt, scale, oil,
grease, and all other materials foreign steel.
, Proper Priming of the Surface - CORRECT ANSWER✅✅Apply sufficient primer if the coating system so
demands, to properly operating dust removal equipment and temperature control equipment for the
surface coated and the material applied is desirable.
At a temporary plant or in the open, as in the case of an over-the-ditch pipe coating operation, -
CORRECT ANSWER✅✅the elimination of dust and moisture that will gather on the structure is an
absolute requirement.
Proper Application of Coating Materials - CORRECT ANSWER✅✅Manufacturers' recommendations
should be followed for application temperature, tensions of wrappers used, spacing, and sequence of
successive layers of film building materials. Cleanliness throughout all phases of this operation is
extremely important
Proper Handling and Storing of Materials - CORRECT ANSWER✅✅This is critical in most materials. Store
materials properly to prevent contamination
Proper Handling of Coated Surface - CORRECT ANSWER✅✅The coated surface must be properly
handled to prevent any damage to the integrity of the coating. The field joint or repair is critical and
proper coating of field repairs and joints provides cathodic protection.
Thorough Inspection - CORRECT ANSWER✅✅All phases of this operation must be scrutinized carefully
to assure compliance with good practices, manufacturers' recommendations, and owners'
specifications.
Durometer - CORRECT ANSWER✅✅measures the hardness of materials
Hygrometer - CORRECT ANSWER✅✅measures the amount of humidity in air or gas
Pyrometer - CORRECT ANSWER✅✅measures the temperature
Pit Gauge - CORRECT ANSWER✅✅measures the depth of a pit and can help the amount of pipe wall
loss
