pipe, ASTM A 106 Grade A, Schedule 40.
2.12.6.1
Panel Gages
Panel gages shall be provided with 150 mm 6 inch diameter face. Accuracy
shall be 1/2 of one percent of scale range. Case shall be aluminum or
high-impact polypropylene reinforced with glass fiber; solid front face;
blowout back. Dial shall be white laminated plastic with black markings.
2.12.6.2
Header Gages
Header gage face shall be 113 mm 4 1/2 inch diameter. Accuracy shall be
one percent of scale range. Bourdon tube shall be bronze, brazed.
Movement shall be stainless-steel geared. Case shall be polished
stainless-steel. Dial shall be fabricated of aluminum.
2.12.6.3
Differential Gages
Differential gage accuracy shall be 1/2 percent of scale range. Pressure
unit shall be rupture-proof, stainless-steel bellows. Body shall be 316
stainless steel with 6894 kpa (gage) 1000 psig safe working pressure. Dial
shall be 150 mm 6 inch diameter.
2.12.7
Level Elements
Level controllers shall be electrode probe type and shall feature remote
electronic enclosure rated NEMA 4 with integral level indicator. Zero and
span adjustments shall be noninteracting. Proportional band adjustment
shall be provided. Electronic output as required. Power input: 115-volt
AC. Prefabricate cable to connect probe to transmitter with quick
disconnect connectors. Probe and electronic circuitry shall be designed to
provide reliable level control unaffected by coating or material buildup on
probe. Liquid level switch elements shall be dry contact (mercury switch
contacts not acceptable), single-pole-dual-throw, rated for at least 120
volt AC, 4 amperes or 125-volt DC, 0.5-amperes, unless noted otherwise.
Switch enclosure shall be NEMA 12 unless noted otherwise. The float
actuated cage shall be external type with temperature and pressure rating
equal to or greater than the design rating of the vessel to which it is
attached. The float and trim materials shall be stainless steel.
Float-type switches shall not be used for slurry tanks.
Differential-pressure type shall be indicating type switch. Electrode
probe types shall be provided with remote NEMA 4 electronic enclosure with
integral level indicator, and noninteracting zero and span adjustments.
Power input: 115-volt AC, single phase 60 hertz. Probe to transmitter
prefabricated cable with quick disconnect connectors. Level indication
shall be unaffected by material buildup on probe.
2.12.8
Flow Elements
Flanged orifice plates shall be 3 mm 1/8 inch thick, 304 stainless steel,
sized for the service. Furnish a calculated calibration curve based upon
design flow conditions plotting flow versus differential pressure.
Insertion flow elements shall be Pitot-tube type using 304 stainless steel
as material. Provide pipe connections. Application shall be for water
only. Provide inline-magnetic type with liner material and thickness to
match the piping. Accuracy shall be plus or minus one percent of rate.
Power supply shall be 110 volt AC, 60 hertz. Furnish prefabricated cable
from primary element to transmitter. Provide integral indication of flow.
Flow switch elements shall be dry contact (mercury switch contacts not
SECTION 15864N
Page 97
Previous Page
