[weather-resistant] [water-tight] [dust-tight] [explosion-proof] enclosure.]
2.15.1.7
Shop Hydrostatic Testing
All pumps shall be subjected to shop hydrostatic testing. One pump in each
service shall be subjected to a complete shop performance test to
demonstrate that, at rated capacity, head is within a margin of plus 3
percent and minus 0 percent of design; efficiency is within a tolerance of
minus 0 percent; NPSH at the pump's BEP and at the rated condition is
within a margin of plus 0 percent and minus 10 percent. Performance tests
shall be in accordance with API Std 610. Procedures and results shall be
subject to the approval of the Contracting Officer.
2.15.2
Condensate Pumps
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NOTE: If inadequate NPSH is available, the designer
shall give consideration to substituting either a
double suction or positive displacement pump.
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Condensate pumps shall be horizontal, end suction, single stage,
centrifugal, motor-driven pumps. Pumps shall have stainless steel shafts
and bronze impellers. Pumps shall be provided with stuffing boxes.
Lubrication shall be by splash oil with oil level sightglass provided.
Pumps shall be subjected to the same tests specified for the Boiler
Feedpumps.
2.16
CONDENSATE TANK AND ACCESSORIES
2.16.1
Condensate Tank
Condensate tank shall be designed for a working pressure of 103 kPa 15 psig
and shall conform to ASME BPVC SEC VIII D1. The tank shall have a storage
capacity equal to or greater than indicated and shall be installed complete
with piping and accessories.
2.16.2
Feedwater Makeup Valve
Float-controlled valve shall be provided for emergency feedwater makeup to
the tank. The valve shall be operated by a float-control mechanism
connected to the surge tank and shall maintain a suitable minimum water
level in the tank. The float box shall be outside the tank and the
connections shall be properly valved to permit blowdown and servicing.
2.17
HEAT EXCHANGERS
Heat exchangers shall be designed, fabricated, tested, and stamped in
accordance with ASME BPVC SEC VIII D1. Additionally, heat exchanger
designs shall meet the requirements of HEI 2623. Closed feedwater heater
designs shall meet the requirements of HEI 2622. Heat exchangers shall be
provided with relief valves as required by ASME BPVC SEC VIII D1 and the
HEI Standards. Heat exchangers using service water shall be designed to
have the service water inside the tubes. The exchangers shall be of
straight tube designs with bolted full diameter access channel covers to
facilitate tube maintenance as required. Return bonnets are acceptable
when there are no tubeside nozzle connections at the far end. Materials of
construction shall be all carbon steel, except the service water side which
shall reflect the service water available. When the water quality permits,
SECTION 15559A
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