specified as two separate operations to allow
separate contractors to accomplish different phases
of project. With the use of SSPC QP-1 and QP-2
requirements in contracts, the same contractor will
generally be accomplishing both phases of work, and
will probably want to perform both phases as a
single operation to avoid preparing surfaces twice.
To accomplish the coating removal and recoating in a
continuous operation, the contractor's plan must be
scrutinized for appropriate controls on the removal
process, and on the surface preparation/coating
application process. Delete this paragraph if no
paint containing hazardous material is to be removed.
**************************************************************************
Coatings containing hazardous materials and identified for disturbance
during surface preparation, including removal, shall be handled in
accordance with Section 13283N REMOVAL AND DISPOSAL OF LEAD CONTAINING
PAINT.
][3.2
DOOR SHEET ACCESS WAY
**************************************************************************
NOTE: Tanks should be evaluated during inspection
and design for appropriateness of cutting out a door
sheet. If there is a reason not to allow a door
sheet to be cut into a particular tank, delete this
paragraph and the related paragraph in Part 1.
**************************************************************************
A door sheet may be cut out of a tank to facilitate personnel and equipment
access. The door sheet shall be removed in accordance with API Std 653 and
API Std 650, including all structural, welding, testing, and evaluation
requirements. After completion of coating CEILING and SHELL and prior to
preparation and coating of FLOOR, the door sheet shall be installed,
tested, and accepted. The door sheet and surrounding areas shall be
surfaced in accordance with Section 4 of NACE RP0178, and accompanying
Visual Comparator, to the condition described and shown for NACE Weld
Surface Preparation Designation "C" welds for interior surfaces and "D"
Welds for exterior surfaces. The door sheet and the feathered areas of the
SHELL shall be prepared and coated with the FLOOR in accordance with all
requirements of this Section. The contractor is responsible for cutting
out the door sheet, stabilizing the tank or openings while the door sheet
is out, replacing the door sheet, and testing the replaced door sheet using
qualified engineering and testing services. Perform tank tightness testing
after coating where a door sheet access way was installed for this project.
]3.3
COATING AND ABRASIVE SAMPLE COLLECTION AND TESTING
3.3.1
Coating Sample Collection
Notify Contracting Officer three days in advance of sampling. The
Contracting Officer and either the QC Manager or NACE Coating Inspector
shall witness all sampling. Provide a sample collection kit as required in
Article entitled "Coating Sample Collection and Shipping Kit." Obtain a one
liter quart sample of each batch of each base material, and proportional
samples of each activator based on mix ratio, by random selection from
sealed containers in accordance with ASTM D 3925. Prior to sampling, mix
contents of each sealed container to ensure uniformity. A batch is defined
SECTION 09973
Page 19
Previous Page
