d.
Thermocouples: Provide a flue gas sensing thermocouple well with
thermocouple one meter 3 feet above the breeching opening and 1
1/2 meters 5 feet below the top of the stack. The wells shall be
CRES and shall extend about halfway into the stack.
2.7.3.3
Finish
Stacks shall be shop coated prior to shipping from the factory.
2.7.3.4
Stack Sampling Platform
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NOTE: Designer shall detail a stack sampling
platform if required. If not required delete this
paragraph. If required the platform will have to be
located at a point as approved by air pollution
control agency having jurisdiction. Many local and
state codes incorporate Title 40 Code of Federal
Regulations, Part 60. Depending upon final air
pollution control equipment arrangement this
location may be on the stack or possibly on a long
length of horizontal breeching. Stack sampling
platform should have the following features:
1. Location of sampling ports would be according to
40 CFR 60 Appendix A, Method.
2. Platform should be one meter 36 inches wide but
at ports location it should project away from
breeching or stack a minimum of 600 mm 2 feet plus
the diameter of the breeching or stack for up to 3
meters 10 feet in diameter stack.
3. If any type of continuous air pollution
monitoring devices are located at stack sampling
point or anywhere else on breeching, a non-vertical
access (stairs or catwalk) is required. For stack
sampling purposes a non-vertical ladder is preferred
but is not required. Platform with grating shall be
designed for a live loading of 1464 kg/m2 300
lbs/sq. ft; platform should have railing with two
intermediate railings and 100 mm 4 inch toeplate.
Four 30 amp weatherproof receptacles and adequate
lighting including lights over the test ports should
be provided.
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Provide stack sampling platform conforming to the requirements of 29 CFR
1910-SUBPART D.
2.7.4
Dampers
2.7.4.1
Multilouver Dampers
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NOTE: Opposed blade dampers shall be used for
throttling service and parallel blade dampers shall
be used for two-position service.
SECTION 15511N
Page 46
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