Geotechnical Construction and Testing to Home Improvements B69

General Construction Specifications

PART 1 - GENERAL

01 WORK INCLUDED

A. All work specified in this section shall comply with the provisions of Section 15010.

B. The Contractor shall provide equipment, material, and/or labor to install the following:

1. Steam-to-water heat exchanger.

2. Compression tank.

3. Tank air control fitting.

4. Tangential air separator.

5. Boiler dip tube fitting.

6. Suction diffuser.

7. P.T. test plugs.

8. Pressure test kit.

9. Pressure gauges.

10. Thermometers.

11. Thermometer test wells.

12. Hydronic pressure reducing valves.

13. Relief valves.

14. Triple duty valves.

15. Flow measure station.

16. Flow balancing valve.

17. Flow measuring meter.

18. Annular flow sensor and meter.

19. Strainers.

20. Thermostatic Steam Traps.

21. Float and Thermostatic Steam Traps.

22. Inverted Bucket Steam Traps.

23. Steam Pressure Reducing Stations.

24. Pressure Relief Valves.

25. Pressure Gauges.

26. Thermometers.

27. Steam Valves for Hot Water Generators.

28. Steam Air Vents.

1.02 RELATED WORK

A. Section 15060: Piping and Fittings

B. Section 15540: Pumps

1.03 SUBMITTALS

A. Submit products to Architect for approval.

PART 2 - PRODUCTS

02 ACCEPTABLE MANUFACTURERS

A. Bell and Gossett ITT

B. Patternson-Kelley

C. Taco, Inc.

D. Thrush

E. Peterson Engineering Company

F. Moeller

G. Gerand

H. Armstrong

I. Dieterich Standard Corporation

J. Savco

K. Hoffman

L. Sisco

M. Sarco

2.02 EQUIPMENT

A. Steam-to-water heat exchanger.

1. Multi-pass, shell and tube construction with "U-bend" removable tube bundle, steam in shell, water in tubes.

2. Tubes: Removable U-tube type bundle with minimum 3/4" OD seamless copper tubes suitable for working pressure set forth on schedules.

3. Heads: Cast iron or steel with steel tube sheets and tube supports.

4. Construction to be in accordance with ASME code for Unfired Pressure Vessels.

5. Provide steel saddle and attaching U-bolts for mounting.

6. Unit shall be stamped with ASME "U" symbol.

7. Heat exchanger to be Bell and Gossett, ITT Type SU, Patterson Kelley, or approved equal.

B. Compression Tank

1. Tanks to be constructed of carbon steel in accordance with ASME Boiler and Pressure Vessel Code.

2. Tank to be constructed and stamped for working pressures set forth on schedules.

3. Stamp tanks with ASME "U" symbol and furnish with Form U-1 denoting compliance with ASME Unfired Pressure Vessel Code.

4. Provide tanks with mounting saddles.

C. Tank Air Control Fittings

1. Furnish an air control tank fitting containing an air separating trap and water control baffle to provide unrestricted air flow to the compression tank and air-free water flow from the tank.

2. Fitting to be constructed with cast iron body and copper plated tubes.

3. Fittings to be equipped with manual vent tube.

4. Construct fitting for working pressure set forth on schedules.

D. Tangential Air Separator

1. Provide an external air separation unit consisting of a steel tank, collector tube, and strainer.

2. Unit to have screwed (OPTION: Flanged) tangential inlet and outlet connections.

3. Design internal perforated stainless air collector tube to direct released air into compression tank.

4. Removable stainless steel system strainer to have 3/16" diameter perforations and free area of not less than five times cross-sectional area of connecting pipe.

5. Construct unit in accordance with ASME Boiler and Pressure Vessel Code and stamp for working pressure specified on schedules.

6. Blowdown connection to facilitate routine cleaning of unit.

7. Unit to prevent accumulation of air in hydraulic heating and/or cooling system and prevent noises caused by entrained air in piping.

E. Boiler Dip Tube Fittings

1. Design boiler dip tube fitting to prevent free air collecting in the boiler from rising into the system.

2. Dip tube fitting to be suitable for working pressure specified on schedule.

F. Suction Diffuser

1. Provide at each end suction pump a suction diffuser with integral strainer of size and type noted on the drawings.

2. Unit to consist of cast iron, angle type body with steel inlet vanes and combination diffuser-strainer-orifice cylinder with 3/16" diameter openings for pump protection.

3. Locate permanent magnet within the flow stream and make removable for cleaning.

4. Equip orifice cylinder with a disposable, fine mesh strainer which shall be removed after system start-up.

5. Design orifice cylinder to withstand pressure differential equal to pump shutoff head and have a free area equal to five times cross-sectional area of pump suction opening.

6. Vane length to be not less than 2-1/2 times the pump connection diameter.

G. P.T. Test Plugs

1. Provide 1/4" solid brass pressure/temperature test plugs at locations shown on drawings.

2. N2 Nordel self-closing valve to be rated for 275 degrees F. service.

H. Pressure Test Kit

1. Provide owner complete portable pressure and temperature test kit.

2. Kit to be complete with pressure test gauge, necessary connector hoses, temperature test thermometer with adapter, shutoff and vent valves and carrying case.

I. Pressure Gauges - Steam

1. Provide 4-1/2" dial gauges where shown on drawings.

2. Gauges to be complete with cast aluminum cases, phosphor bronze bourdon tubes, monel rotary movements and nylon gears, silver soldered joints, white dial faces, with black letters and black micrometer type printer, forged brass sockets and an accuracy of 1/2 of 1% of the scale range.

3. Crane No. 714 or equal 1/4" gauge cocks to be furnished with each gauge.

4. Pressure gauges used on steam service to be equipped with iron coil syphons to form pocket of water between gauge and steam. Syphons to have a 1/4" male pipe thread on each end. Webster No. A031 or equal.

5. Gauges to be Weksler AA1, Ashcroft, Trerice or Mueller. Dial range of gauges to be selected to indicate design pressure at midpoint of scale.

J. Pressure Gauges - Water

1. Provide 3-1/2" dial gauges at locations shown on drawings.

2. Gauges to be equal to Marsh "Quality Gauge" with recalibrator integral including copper-clad steel or cast iron and chrome plated steel ring.

3. Accuracy to be guaranteed with 2% of scale range.

4. Select scale range of gauges to indicate design pressure at midpoint of scale.

5. Gauges to be Marsh Type 1 or approved equal.

6. Gauge cocks for each gauge to be Crane No. 712 or equal 1/4" size.

7. Provide each gauge with impulse dampener equal to Trerice 870.

K. Thermometers and Wells

1. Provide 9" scale thermometers, adjustable angle (rear, front, and side), with separable brass wells at locations shown on drawings.

2. Provide Moeller 3158 or equal stainless steel thermometer test wells at locations shown on drawings.

3. Test wells to be stainless steel with 2-1/2" extension neck and screw plug capped with chain and shall be filled with light clear oil.

L. Hydronic System Pressure Reducing Valves

1. Each reducing valve to be equipped with antisyphon check valve and removable strainer.

2. Select reducing valve for operation at midpoint of adjustment range.

3. Pressure reducing valve to be factory set with adjustable range for final system operating pressure adjustment at job site.

M. Relief Valves

1. Provide relief valves for each hydronic system as shown on drawings.

2. Construct valve to ASME requirements, tested by National Board, and labeled with ASME symbol.

3. Valve body to be of non-ferrous construction.

4. Valves to be diaphragm type operating with slow opening and closing feature.

5. Valve to seat against face of EPDM rubber.

6. Set differential between opening and closing pressure to prevent water flash and water hammer.

7. Unit to include manual lever for testing valve.

N. Triple Duty Valves

1. Provide triple duty valves as shown on the plans that incorporate non-slam, vertical lift check, calibrated balance, and positive shutoff, all in one valve.

2. Valve to have weighted disc, hand lap seat and disc, and be suitable for 300 degrees F. operating temperature.

3. Unit to be cast iron body construction, suitable for maximum working pressure as specified on drawings.

O. Flow Measuring Station

1. Unit to have orifice insert with provisions for connecting a portable differential pressure meter for flow measurement.

2. Unit to be plated on all surfaces and provided with name tags showing the capacity curve applicable to this meter.

3. Sizes 1/2" thru 2" to be brass threads; 2-1/2" thru 4" machined for socket weld; 5" and above for butt weld.

4. Meter connections to have built-in check valves suitable for working pressure as specified on drawings at 250 degrees F.

5. Measuring station to be furnished with engraved tag attached indicating design flow, pressure, and flow characteristics of station.

P. Flow Balancing Valve

1. To be calibrated non-ferrous valve with provisions for connecting a portable differential pressure meter for flow measurement and balance.

2. Meter connections to have built-in check valves.

3. Integral pointer to register degree of valve opening with tamper proof memory feature.

4. Valve to have drain connection.

5. Construct valve with integral sieves to prevent leakage around rotating element.

Q. Flow Measuring Meter

1. Provide portable readout meter capable of indicating pressure differential across previously specified flow measuring devices.

2. Unit to be complete with necessary hoses, shutoff and vent valves, and carrying case.

3. Reading range to be midscale of units to be read.

R. Annual Flow Sensor and Meter

1. Provide annular primary flow element where shown on drawings.

2. Include annular primary flow element station and permanently mounted indicator.

3. Annular measuring station to be complete with safety shutoff valves and permanent coupling connections.

4. Provide metal tag showing design flow rates, meter readings for design flow rates, meter fluid, line size, and tag and station number.

5. Annular measuring element to be constructed of stainless steel.

6. Stations to be either nipple section or weld insert type, depending on pipe size, rated at 275 psi at 400 degrees F.

S. Pipe Escutcheons:

1. General: Provide pipe escutcheons as specified herein with inside diameter closely fitting pipe outside diameter, or outside of pipe insulation where pipe is insulated. Select outside diameter of escutcheon to completely cover pipe penetration hole in floors, walls, or ceilings; and pipe sleeve extension, if any. Furnish pipe escutcheons with nickel or chrome finish for occupied areas, prime paint finish for unoccupied areas. Where sleeves extend above floor finish, provide units with sufficient depth to conceal sleeve.

2. Pipe Escutcheons for Moist Areas: For waterproof floors, and areas where water and condensation can be expected to accumulate, provide cast brass or sheet brass escutcheons, solid or split hinged.

3. Pipe Escutcheons for Dry Areas: Provide sheet steel escutcheons, solid or split hinged.

T. Dielectric Unions: Provide standard products recommended by manufacturer for use in service indicated, which effectively isolate ferrous from non-ferrous piping (electrical conductance), prevent galvanic action, and stop corrosion.

U. Vandal-Proof Vent Caps: Provide cast-iron vandal-proof vent caps, full size of vent pipe, calked base connection for cast-iron pipes, threaded base for steel pipes.

V. Drip Pans: Provide drip pans fabricated from corrosion-resistant sheet metal with watertight joints, and with edges turned up 2-1/2". Reinforce top, either by structural angles or by rolling top over 1/4" steel rod. Provide hole, gasket, and flange at low point for watertight joint and 1" drain line connection.

W. Pipe Sleeves: Provide pipe sleeves of one of the following:

1. Sheet Metal: Fabricate from galvanized steel metal; round tube closed with snaplock joint, welded spiral seams, or welded longitudinal joint. Fabricate from the following gages: 3" and smaller, 20 gage; 4" to 6", 16 gage; over 6", 14 gage.

2. Steel-Pipe: Fabricate from Schedule 40 galvanized steel pipe; remove burrs.

3. Iron-Pipe: Fabricate from cast-iron or ductile-iron pipe; remove burrs.

4. Plastic-Pipe: Fabricate from Schedule 80 PVC plastic pipe; remove burrs.

X. Sleeve Seals: Provide sleeve seals for sleeves of one of the following:

1. RTV Silicone Foam: Calked between sleeve and pipe.

2. Lead and Oakum: Calked between sleeve and pipe if below grade in exterior wall.

3. Modular mechanical type, consisting of interlocking synthetic rubber links shaped to continuously fill annular space between pipe and sleeve, connected with bolts and pressure plates which cause rubber sealing elements to expand when tightened, providing watertight seal and electrical insulation.

Y. Provide bellows type water hammer arresters, stainless steel casing and bellows, pressure rated for 250 psi, tested and certified in accordance with PDI Standard WH-201.

Z. Low Pressure Y-Type Pipeline Strainers:

1. General: Comply with Fluid Control Institute Standard 73-1. Provide strainers full line size of connecting piping, with ends matching piping system materials. Select strainers for 125 psi working pressure.

2. Screens for Water Service 2" and Smaller: Monel or Type 304 stainless steel, 20 mesh or 1/32" openings.

3. Screens for Water Service, 2-1/2" through 4": Perforated brass, 1/16" openings.

4. Screens for Water Service, 5" and Larger: Perforated brass, 1/8" openings.

5. Screens for Steam Service, 2" and Smaller: Monel or Type 304 stainless steel, 30 mesh or 1/50" openings.

6. Screens for Steam Service, 2-1/2" through 10": Perforated brass, 3/64" openings.

7. Screens for Steam Service, 12" and Larger: Perforated brass, 1/16" openings.

8. Threaded Ends, 2" and Smaller: Cast-iron body, screwed screen retainer with centered blowdown fitted with pipe plug.

9. Threaded Ends, 2-1/2" and Larger: Cast-iron body, bolted screen retainer with off-center blowdown fitted with pipe plug.

10. Flanged Ends, 2-1/2" and Larger: Cast-iron body, bolted screen retainer with off-center blowdown fitted with pipe plug.

11. Butt Welded Ends, 2-1/2" and Larger: Schedule 40 cast carbon steel body, bolted screen retainer with off-center blowdown fitted with pipe plug.

AA. High Pressure Y-Type Pipeline Strainers:

1. General: Comply with Fluid Control Institute Standard 73-1. Provide strainers full line size of connecting piping with ends matching piping system materials. Select strainers for 250 psi working pressure.