bafbrwhq15122.pdf

SECTION 15122 REPAIR WING HEADQUARTERS, BLDG 706

METERS AND GAUGES CRWU 06-2071

06/09/09 15122-1 BUCKLEY AFB

SECTION 15122 - METERS AND GAUGES

PART 1 - GENERAL

1.01 SUMMARY:

A. This Section includes the following meters and gauges for mechanical systems:

1. Thermometers.

2. Thermowells.

3. Gauges.

4. Test plugs.

1.02 REFERENCES:

A. Applicable Standards:

1. ASME International (ASME):

a. B40.3 - Bimetallic Actuated Thermometers.

b. B40.5 - Snubbers.

c. B40.100 - Pressure Gauges and Gauge Attachments.

1.03 DEFINITIONS:

A. CR: Chlorosulfonated polyethylene synthetic rubber.

B. EPDM: Ethylene-propylene-diene terpolymer rubber.

1.04 SUBMITTALS:

A. General: Submit the following in accordance with SECTION 15050 - BASIC MECHANICAL

MATERIALS AND METHODS.

B. Product Data: For each type of product indicated; include performance curves.

PART 2 - PRODUCTS

2.01 MANUFACTURERS:

A. In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection:

1. Manufacturers: Subject to compliance with requirements, provide products by one of the manufacturers specified.

2.02 METAL-CASE, LIQUID-IN-GLASS THERMOMETERS:

A. Manufacturers:

1. Trerice, H. O. Co.

2. Weiss Instruments, Inc.

3. Weksler Instruments Operating Unit; Dresser Industries; Instrument Div.

B. Case: Die-cast aluminum or brass, 7 inches (178 mm) long.

C. Tube: Red or blue reading, mercury or organic-liquid filled, with magnifying lens.

D. Tube Background: Satin-faced, nonreflective aluminum with permanently etched scale markings.

E. Window: Glass or plastic.

F. Connector: Adjustable type, 180 degrees in vertical plane, 360 degrees in horizontal plane, with locking device.

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G. Stem: Copper-plated steel, aluminum, or brass for thermowell installation and of length to suit installation.

H. Accuracy: Plus or minus 1% of range or plus or minus 1 scale division to maximum of 1.5% of range.

2.03 DUCT-TYPE, LIQUID-IN-GLASS THERMOMETERS:

A. Manufacturers:

1. Trerice, H. O. Co.

2. Weiss Instruments, Inc.

B. Case: Metal or plastic, 7 inches (178 mm) long.

C. Tube: Red or blue reading, mercury or organic filled, with magnifying lens.

D. Tube Background: Satin-faced, nonreflective aluminum with permanently etched scale markings.

E. Window: Glass or plastic.

F. Connector: Adjustable type, 180 degrees in vertical plane, 360 degrees in horizontal plane, with locking device.

G. Stem: Metal, for installation in mounting bracket and of length to suit installation.

H. Mounting Bracket: Flanged fitting for attachment to duct and made to hold thermometer stem.

I. Accuracy: Plus or minus 1% of range or plus or minus 1 scale division to maximum of 1.5% of range.

2.04 BIMETALLIC-ACTUATED DIAL THERMOMETERS:

A. Manufacturers:

1. Ashcroft Commercial Instrument Operations; Dresser Industries; Instrument Div.

2. Ernst Gage Co.

3. Trerice, H. O. Co.

4. Weiss Instruments, Inc.

5. Weksler Instruments Operating Unit; Dresser Industries; Instrument Div.

B. Description: Direct-mounting, bimetallic-actuated dial thermometers complying with

ASME B40.3.

C. Case: Dry type, stainless steel with 3-inch (76-mm) diameter.

D. Element: Bimetal coil.

E. Dial: Satin-faced, nonreflective aluminum with permanently etched scale markings.

F. Pointer: Red metal.

G. Window: Glass or plastic.

H. Ring: Stainless steel.

I. Connector: Adjustable angle type.

J. Stem: Metal, for thermowell installation and of length to suit installation.

K. Accuracy: Plus or minus 1% of range or plus or minus 1 scale division to maximum of 1.5% of range.

2.05 THERMOWELLS:

A. Manufacturers:

1. Ashcroft Commercial Instrument Operations; Dresser Industries; Instrument Div.

2. Ernst Gage Co.

3. Trerice, H. O. Co.

4. Weiss Instruments, Inc.

5. Weksler Instruments Operating Unit; Dresser Industries; Instrument Div.

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B. Manufacturers: Same as manufacturer of thermometer being used.

C. Description: Pressure-tight, socket-type metal fitting made for insertion into piping and of type, diameter, and length required to hold thermometer.

2.06 PRESSURE GAUGES:

A. Manufacturers:

1. Ashcroft Commercial Instrument Operations; Dresser Industries; Instrument Div.

2. Ernst Gage Co.

3. Trerice, H. O. Co.

4. Weiss Instruments, Inc.

5. Weksler Instruments Operating Unit; Dresser Industries; Instrument Div.

B. Direct-Mounting, Dial-Type Pressure Gauges: Indicating-dial type complying with

ASME B40.100.

1. Case: Dry type, metal or plastic, 4-1/2-inch (114-mm) diameter.

2. Pressure-Element Assembly: Bourdon tube, unless otherwise indicated.

3. Pressure Connection: Brass, NPS 1/4 (DN 8), bottom-outlet type unless back-outlet type is indicated.

4. Movement: Mechanical, with link to pressure element and connection to pointer.

5. Dial: Satin-faced, nonreflective aluminum with permanently etched scale markings.

6. Pointer: Red metal.

7. Window: Glass or plastic.

8. Ring: Metal or plastic.

9. Accuracy: Grade B, plus or minus 2% of middle half scale.

10. Vacuum-Pressure Range: 30-in. Hg of vacuum to 15 psig of pressure (100 kPa of vacuum to 103 kPa of pressure).

11. Range for Fluids under Pressure: Two times operating pressure.

C. Pressure-Gauge Fittings:

1. Valves: NPS 1/4 (DN 8) brass or stainless-steel needle type.

2. Syphons: NPS 1/4 (DN 8) coil of brass tubing with threaded ends.

3. Snubbers: ASME B40.5, NPS 1/4 (DN 8) brass bushing with corrosion-resistant, porous-metal disc of material suitable for system fluid and working pressure.

2.07 TEST PLUGS:

A. Manufacturers:

1. National Meter, Inc.

2. Peterson Equipment Co., Inc.

3. Trerice, H. O. Co.

4. Watts Industries, Inc.; Water Products Div.

B. Description: Corrosion-resistant brass or stainless-steel body with core inserts and gasketed and threaded cap, with extended stem for units to be installed in insulated piping.

C. Minimum Pressure and Temperature Rating: 500 psig at 200oF (3450 kPa at 93oC).

D. Core Inserts: One or two self-sealing rubber valves.

1. Insert material for air, water, oil, or gas service at 20 to 200oF (minus 7 to plus 93oC) shall be CR.

2. Insert material for air or water service at minus 30 to plus 275oF (minus 35 to plus 136oC) shall be EPDM.

BUCKLEY AFB 15122-4 06/09/09

E. Test Kit: Furnish one test kit(s) containing one pressure gage and adaptor, one thermometer(s), and carrying case. Pressure gauge, adapter probes, and thermometer sensing elements shall be of diameter to fit test plugs and of length to project into piping.

1. Pressure Gauge: Small bourdon-tube insertion type with 2- to 3-inch- (51- to 76-mm-) diameter dial and probe. Dial range shall be 0 to 200 psig (0 to 1380 kPa).

2. High-Range Thermometer: Small bimetallic insertion type with 1- to 2-inch- (25- to 51-mm-) diameter dial and tapered-end sensing element. Dial ranges shall be 0 to 220oF (minus 18 to plus 104oC).

3. Carrying case shall have formed instrument padding.

PART 3 - EXECUTION

3.01 THERMOMETER APPLICATIONS:

A. Install liquid-in-glass thermometers in the following locations:

1. Inlet and outlet of each hydronic zone.

2. Inlet and outlet of each thermal storage tank.

3. Outside-air, return-air, and mixed-air ducts.

B. Install dry-case-type, bimetallic-actuated dial thermometers at suction and discharge of each pump.

C. Provide the following temperature ranges for thermometers:

1. Domestic Hot Water: 30 to 180oF, with 2-degree scale divisions (Minus 1 to plus 82oC, with 1-degree scale divisions).

2. Domestic Cold Water: 0 to 100oF, with 2-degree scale divisions (Minus 18 to plus 38oC, with 1-degree scale divisions).

3. Heating Hot Water: 30 to 240oF, with 2-degree scale divisions (Minus 1 to plus 115oC, with 1-degree scale divisions).

4. Air Ducts: Minus 40 to plus 110oF, with 2-degree scale divisions (Minus 40 to plus

43oC, with 2-degree scale divisions).

3.02 GAUGE APPLICATIONS:

A. Install dry-case-type pressure gauges at suction and discharge of each pump.

3.03 INSTALLATIONS:

A. Install direct-mounting thermometers and adjust vertical and tilted positions.

B. Install thermowells with socket extending to center of pipe and in vertical position in piping tees where thermometers are indicated.

C. Duct Thermometer Support Flanges: Install in wall of duct where duct thermometers are indicated. Attach to duct with screws.

D. Install needle-valve and snubber fitting in piping for each pressure gauge for fluids (except steam).

E. Install needle-valve and syphon fitting in piping for each pressure gauge for steam.

F. Install test plugs in tees in piping.

G. Install permanent indicators on walls or brackets in accessible and readable positions.

H. Install connection fittings for attachment to portable indicators in accessible locations.

I. Assemble components and install thermal-energy meters.

J. Mount meters on wall if accessible; if not, provide brackets to support meters.

3.04 CONNECTIONS:

06/09/09 15122-5 BUCKLEY AFB

A. Install meters and gauges adjacent to machines and equipment to allow service and maintenance for meters, gauges, machines, and equipment.

B. Ground equipment according to DIVISION 16 Section "Grounding."

C. Connect wiring according to DIVISION 16 Section "Wiring and Cables."

3.05 ADJUSTING:

A. Calibrate meters according to manufacturer's written instructions, after installation.

B. Adjust faces of meters and gauges to proper angle for best visibility.

END OF SECTION 15122