15715-PIPING, VALVES & EQUIP.doc

SECTION 15715PRIVATE

PIPING, VALVES, & EQUIPMENT

PART 1. GENERAL

1.01 WORK INCLUDED

A. Low Pressure Steam Piping

B. High Pressure Steam Piping

C. Steam Condensate Piping

D. Pressure Relief Valve Piping

E. Steam Traps

F. Blowdown Piping

G. Chemical Feed and Boiler Feed Water Piping

H. Natural Gas Piping

I. Fuel Oil Piping

J. Domestic Cold Water Piping

K. Unions and Coupling

L. Flanges

M. Piping Specialties

N. Shut Off Valves

O. Flexible Pipe Connection

P. Balance Valves

Q. Stem Type Thermometers

R. Separable Socket Wells

S. Piping Identification

T. Pete's (P & T) Plugs

U. Pressure Gauges

V. Gauge Cocks

X. Instruments

Y. Chemical Treatment System

Z. Valve Tags

AA. Check Valves

BB. Solder

CC. Automatic Air Vents

DD. Sootblower Piping

EE. Strainers

FF. Wye Strainers

GG. Suction Diffusers

HH. Expansion tank

II. Air Separator JJ. Pressure Relief Valves

KK. Suction Diffusers

LL. Steam Pressure Reducing Valves

MM. Triple Duty Valves

NN. Water Line Heating Cables (Heat Tape)

OO. Pipe, Pipe Fittings and Piping Specialties

PP. Valves

QQ. Cold Water Piping

RR. Hot Water and Hot Water Recirculating Piping

RA. Air Conditioning Condensate Piping

RB. Hot Water (Space Heating) Piping

RC. Refrigerant Piping

RD. Fiberglass Piping

RE. Refrigerant Specialties

RF. Condensate Pumping Units

RG. Boiler Feedwater Units

RH.Condenser Water/Chilled water Piping System

RI. Make up Water Piping System

RJ. Quick-Fill Water Piping System

1.02 QUALITY ASSURANCE

A. Valves: Manufacturer's name and pressure rating marked on valve body.

B. Welding Materials and Procedures: Conform to ASME Code and applicable State Labor Regulations.

C. Welders Certification: In accordance with ANSI/ASME B31.1 for pressure piping and ANSI/ASME Sec. 9.

D. All piping and fittings shall be new and of domestic (USA) manufacturer. The ASTM number and schedule shall be stamped on each length of piping.

E. All piping, valves, flanges, equipment, etc. shall be in accordance with the latest edition of the applicable codes and standards.

F. If the standards and codes requirements are different than as specified, contractor shall comply with the most stringent requirements at no additional cost to the Government.

1.03 SUBMITTALS

E. Include data on pipe materials, pipe fittings, valves and all items identified in "Work Included" paragraph.

F. Provide welder's certificate for all welders on this project.

1.04 DELIVERY, STORAGE, AND HANDLING

A. Deliver and store valves in shipping containers with labeling in place.

PART 2 - PRODUCTS

2.01 LOW PRESSURE STEAM PIPING: (0 - 15 PSIG)

A. Steel Pipe: ASTM A53, Grade B for pipe 5" and larger or ASTM A120 for pipe 4" and smaller, Schedule 40, black. The ASTM number and schedule shall be stamped on each length of pipe. Screwed Fittings: ANSI/ASME B16.3, malleable iron, Class 125, ASTM A126-73; Welded Fittings: Class 125, forged steel butt weld type, ASTM A234. All Joints: Screwed for pipe two inches and smaller, national pipe thread, reamed and cleared of burrs; ANSI/AWS D1.1 welded for pipe two and one-half and larger per ANSI B31-3 for pressure piping.

B. Nipples: All thread nipples are prohibited. Nipples 1-1/2" and smaller in diameter and attached to larger pipes shall be Schedule 80 and shall be attached with the use of Threadolets or Weldolets.

C. Flanges: Provide 150 pound flanged ends on 2-1/2" and larger piping at connections to all valves, piping specialties and equipment connections. Companion flanges shall be 150 pound carbon steel.

D. Elbows: Long radius elbows shall be used except where space restrictions absolutely dictate the use of short radius type. Mitered piping elbows are prohibited.

E. Weldolets and Threadolets: Weldolets and Threadolets may be used for side outlet reducing tees only if the branch is more than two pipe sizes smaller than the main. Otherwise, tees shall be used. Reducers and increasers in horizontal piping shall be eccentric type, installed with the bottom level. Reducers and increasers in vertical piping shall be concentric type.

F. Grade: Slope bottom of pipe down 1/2 inch in 20 feet in the direction of flow.

2.02 MEDIUM PRESSURE STEAM PIPING: (16 TO 99 PSIG)

A. Steel Pipe: ASTM A53, Grade B for pipe 5" and larger or ASTM A120 for pipe 4" and smaller, Schedule 40, black. The ASTM number and schedule shall be stamped on each length of pipe. Screwed Fittings: ANSI/ASME B16.3, malleable iron, Class 125, ASTM A126-73; Welded Fittings: Class 125, forged steel butt weld type, ASTM A234. All Joints: Screwed for pipe two inches and smaller, national pipe thread, reamed and cleared of burrs; ANSI/AWS D1.1 welded for pipe two and one-half and larger per ANSI B31-3 for pressure piping.

B. Nipples: All thread nipples are prohibited. Nipples 1-1/2" and smaller in diameter and attached to larger pipes shall be Schedule 80 and shall be attached with the use of Threadolets or Weldolets.

C. Flanges: Provide 150 pound flanged ends on 2-1/2" and larger piping at connections to all valves, piping specialties and equipment connections. Companion flanges shall be 150 pound carbon steel.

D. Elbows: Long radius elbows shall be used except where space restrictions absolutely dictate the use of short radius type. Mitered piping elbows are prohibited.

E. Weldolets and Threadolets: Weldolets and Threadolets may be used for side outlet reducing tees only if the branch is more than two pipe sizes smaller than the main. Otherwise, tees shall be used. Reducers and increasers in horizontal piping shall be eccentric type, installed with the bottom level. Reducers and increasers in vertical piping shall be concentric type.

F. Grade: Slope bottom of pipe down 1/2 inch in 20 feet in the direction of flow.

2.03 HIGH PRESSURE STEAM PIPING: (100 PSIG AND ABOVE)

A. Steel Pipe: ASTM A53, Grade B for pipe 5" and larger or ASTM A120 for pipe 4" and smaller, Schedule 80, black. The ASTM number and schedule shall be stamped on each length of pipe. Screwed Fittings: ANSI/ASME B16.3, malleable iron, Class 300, ASTM A126-73; Welded Fittings: Extra strong, forged steel butt weld type, ASTM A234. All Joints: Screwed for pipe two inches and smaller, national pipe thread, reamed and cleared of burrs; ANSI/AWS D1.1 welded for pipe two and one-half and larger per ANSI B31-3 for pressure piping.

B. Nipples: All thread nipples are prohibited. Nipples 1-1/2" and smaller in diameter and attached to larger pipes shall be Schedule 80 and shall be attached with the use of Threadolets or Weldolets.

C. Flanges: Provide 300 pound flanged ends on 2-1/2" and larger piping at connections to all valves, piping specialties and equipment connections. Companion flanges shall be 300 pound carbon steel.

D. Elbows: Long radius elbows shall be used except where space restrictions absolutely dictate the use of short radius type. Mitered piping elbows are prohibited.

E. Weldolets and Threadolets: Weldolets and Threadolets may be used for side outlet reducing tees only if the branch is more than two pipe sizes smaller than the main. Otherwise, tees shall be used. Reducers and increasers in horizontal piping shall be eccentric type, installed with the bottom level. Reducers and increasers in vertical piping shall be concentric type.

F. Grade: Slope bottom of pipe down 1/2 inch in 20 feet in the direction of flow.

2.04 STEAM CONDENSATE PIPING:

A. Steel Pipe: ASTM A53, Grade B for pipe 5" and larger or ASTM A120 for pipe 4" and smaller, Schedule 80, black. The ASTM number and schedule shall be stamped on each length of pipe. Screwed Fittings: ANSI/ASME B16.3, malleable iron, Class 300, ASTM A126-73; Welded Fittings: Extra strong, forged steel butt weld type, ASTM A234. All Joints: Screwed for pipe two inches and smaller, national pipe thread, reamed and cleared of burrs; ANSI/AWS D1.1 welded for pipe two and one-half and larger per ANSI B31-3 for pressure piping.

B. Nipples: All thread nipples are prohibited. Nipples 1-1/2" and smaller in diameter and attached to larger pipes shall be Schedule 80 and shall be attached with the use of Threadolets or Weldolets.

C. Flanges: Provide 300 pound flanged ends on 2-1/2" and larger piping at connections to all valves, piping specialties and equipment connections. Companion flanges shall be 300 pound carbon steel.

D. Elbows: Long radius elbows shall be used except where space restrictions absolutely dictate the use of short radius type. Mitered piping elbows are prohibited.

E. Weldolets and Threadolets: Weldolets and Threadolets may be used for side outlet reducing tees only if the branch is more than two pipe sizes smaller than the main. Otherwise, tees shall be used. Reducers and increasers in horizontal piping shall be eccentric type, installed with the bottom level. Reducers and increasers in vertical piping shall be concentric type.

F. Grade: Slope bottom of pipe down 1/2 inch in 20 feet in the direction of flow.

2.04 PRESSURE RELIEF VALVE PIPING

A. Utilize same piping specified as the medium being discharged. Bronze body, teflon seat, steel stem and springs, automatic, direct pressure actuated, capacities ASME certified and labelled. Provide 30 psig (unless indicated otherwise) relief valves for hot water boilers, 50 psig relief valves for make-up water stations, 15 psig relief valves for steam boilers and other relief valves as indicated. Water heater relief valves shall be as recommended by the manufacturer.

2.05 STEAM TRAPS

A. Float and thermostatic steam traps shall be of the mechanical lever SS ball float type having an SG ductile iron body with horizontal inline screwed connections and shall incorporate a balanced pressure thermostatic air vent. Valve mechanism and valve seats shall be stainless steel (SS) and attached to a removable cover for easy maintenance. Cover shall be 180 reversible to permit flow in either direction. Provide SS bellow type air vent. See drawings for capacities.

B. Thermodynamic steam traps shall be all stainless steel thermodynamic disc type with connections on a common center line which can be installed in position. Integral seat design with hardened disc and seating surfaces.

C. INVERTED BUCKET TRAPS: Inverted bucket type with Class 30 ASTM A-126 cast-iron body and cover, suitable for intermittent operation.

Stainless steel bucket, seat, head, operating mechanism and strainer. Provide to drain condensate from steam mains, headers, and branches.

A. Approved manufacturers: Watson McDaniel, Yarway, Spirax Sarco, B&G and McDonnell Miller.

2.06 BLOWDOWN PIPING:

A. Steel Pipe: ASTM A53, Grade B for pipe 5" and larger or ASTM A120 for pipe 4" and smaller, Schedule 80, black. The ASTM number and schedule shall be stamped on each length of pipe. Screwed Fittings: ANSI/ASME B16.3, malleable iron, Class 300, ASTM A126-73; Welded Fittings: Extra strong, forged steel butt weld type, ASTM A234. All Joints: Screwed for pipe two inches and smaller, national pipe thread, reamed and cleared of burrs; ANSI/AWS D1.1 welded for pipe two and one-half and larger per ANSI B31-3 for pressure piping.

B. Nipples: All thread nipples are prohibited. Nipples 1-1/2" and smaller in diameter and attached to larger pipes shall be Schedule 80 and shall be attached with the use of Threadolets or Weldolets.

C. Flanges: Provide 300 pound flanged ends on 2-1/2" and larger piping at connections to all valves, piping specialties and equipment connections. Companion flanges shall be 300 pound carbon steel.

D. Elbows: Long radius elbows shall be used except where space restrictions absolutely dictate the use of short radius type. Mitered piping elbows are prohibited.

E. Weldolets and Threadolets: Weldolets and Threadolets may be used for side outlet reducing tees only if the branch is more than two pipe sizes smaller than the main. Otherwise, tees shall be used. Reducers and increasers in horizontal piping shall be eccentric type, installed with the bottom level. Reducers and increasers in vertical piping shall be concentric type.

F. Grade: Slope bottom of pipe down 1/2 inch in 20 feet in the direction of flow.

2.07 CHEMICAL FEED WATER AND BOILER FEED WATER PIPING:

A. Steel Pipe: ASTM A53, Grade B for pipe 5" and larger or ASTM A120 for pipe 4" and smaller, Schedule 80, black. The ASTM number and schedule shall be stamped on each length of pipe. Screwed Fittings: ANSI/ASME B16.3, malleable iron, Class 250, ASTM A126-73; Welded Fittings: Class 250, forged steel butt weld type, ASTM A234. All Joints: Screwed for pipe two inches and smaller, national pipe thread, reamed and cleared of burrs; ANSI/AWS D1.1 welded for pipe two and one-half and larger per ANSI B31-3 for pressure piping.

B. Nipples: All thread nipples are prohibited. Nipples 1-1/2" and smaller in diameter and attached to larger pipes shall be Schedule 80 and shall be attached with the use of Threadolets or Weldolets.

C. Flanges: Provide 300 pound flanged ends on 2-1/2" and larger piping at connections to all valves, piping specialties and equipment connections. Companion flanges shall be 300 pound carbon steel.

D. Elbows: Long radius elbows shall be used except where space restrictions absolutely dictate the use of short radius type. Mitered piping elbows are prohibited.

E. Weldolets and Threadolets: Weldolets and Threadolets may be used for side outlet reducing tees only if the branch is more than two pipe sizes smaller than the main. Otherwise, tees shall be used. Reducers and increasers in horizontal piping shall be eccentric type, installed with the tops level to facilitate air removal. Reducers and increasers in vertical piping shall be concentric type.

2.08 NATURAL GAS PIPING

A. Steel Pipe: ASTM A53 or A120, Schedule 40 black. Fittings: ANSI/ASME B16.3, malleable iron, Class 125 or ASTM A234, Class 125 forged steel butt weld type. Joints: Screwed for pipe two inches and under; ANSI/AWS D1.1, welded, for pipe over two inches.

2.09 DOMESTIC COLD WATER PIPING

A. Copper Tubing: ASTM B88 type K or L hard drawn. Fitting: ANSI/ASME B16.9 pressure pattern wrought copper. Joints: ANSI/ASTM B32 Lead free solder, having a composition of 95.5% tin, 4% copper and 0.5% silver.

B. On piping 2" and larger, the contractor has the option of using grooved couplings and grooved fittings as manufactured by Victaulic.

C. In lieu of manufactured copper tee fittings, the contractor has the option of using mechanically formed tee connections. Mechanically formed tees shall conform to the following:

Mechanically extracted collars shall be formed in a continuous operation consisting of drilling a pilot hole and drawing out the tube surface to form a collar having a height of not less than three times the thickness of the tube wall. The collaring device shall be fully adjustable as to insure proper tolerance and complete uniformity of the joint. The branch shall be notched to conform with the inner curve of the run tube and dimpled to insure penetration of the branch tube into the collar is of sufficient depth for brazing and that the branch tube does not obstruct the flow in the mainline tube. Dimples shall be in line with the run of the tube and visible through the braze. All joints shall be brazed with BCUP-2 braze. The method shall be provided by T-drill.

2.10 UNIONS AND COUPLINGS AND DIELECTRIC UNIONS

A. Grooved and Shouldered Pipe End Couplings: Malleable iron housing clamps to engage and lock, designed to permit some angular deflection, contraction and expansion; "C" shape composition sealing gasket; steel bolts, nuts, and washers; galvanized couplings for galvanized pipe.

B. Dielectric Connections: Union with galvanized or plated steel threaded end, copper solder end, water impervious isolation barrier.

2.11 FLANGES

A. Raised face 150 lb. or 300 lb. as specified welding neck flanges with carbon steel bolts full size of bolt holes and hex nuts with washers. Install flanges in horizontal lines with bolt holes straddling vertical and horizontal pipe center lines. Install flanges in vertical lines with bolt holes straddling lines parallel to equipment center lines and building lines. Gaskets shall be 1/16" Teflon, applicable ANSI Standards.

2.12 SOLDER

A. Solder shall be lead free having composition of 95.5% tin, 4% copper and 0.5% silver. Solder shall have a tensile strength of 6,900 psi at 70 degrees F.

2.13 SHUT OFF VALVES

A. Shut off valves for the domestic cold water systems, (domestic and heating) hot water, recirculating hot water, tempered water and cold water systems, chilled water, condenser water shall be:

Ball Valves: On Piping 2" and smaller; 400 psi WOG;

full port, 3-pc.

construction, blow-out proof stem, threaded ends or solder ends as applicable

Butterfly Valves: On piping

2-1/2" and larger: 150 WOG, 250F maximum temperature, lug style, iron body, extended neck, EPDM liner, stainless steel one-piece stem, bronze disc, lever lock, adjustable memory stop.

HIGH PERFORMANCE BUTTERFLY VALVE FOR CHILLED WATER AND IN VALVE PITS: 2-1/2” and larger: Class 150 WOG, 500 deg. max. temp., carbon steel body, lug style, extended neck, SS trim, PTFE seats, lever lock, SS disk, SS stem, adjustable memory stop.

B. Shut off valves for the natural gas systems shall be: 2” and smaller: ball valve

2-1/2” and larger: gas cock

C. Shut-Off valves for the low pressure steam condensate, low pressure steam boiler feed water system, blowdown systems and chemical feed systems, chilled/condenser water shall be:

2" and

Smaller

Gate Valves: 200 psi WOG; non- Nibco rising stem, solid wedge;

Crane bronze body; threaded ends

Hammond and screw-in bonnet Stockham smaller, flanged ends and

Milwaukee bolted bonnet on sizes

2-1/2" and

Larger

Gate Valves: 200 psi WOG;

Nibco rising stem, bronze solid wedge disk; iron body; bronze trim; bolted bonnet; outside screw and yoke: and flanged ends.

D. Shut-off valves for the medium and high pressure steam condensate and medium and high pressure steam shall be:

· 2" and

· Smaller

Gate Valves: 400 psi WOG;

rising stem, solid wedge disk;

threaded ends, union bonnet and bronze body

· 2-1/2" and

· Larger

Gate Valves: 500 psi WOG;

rising stem, solid wedge disk, iron body; bronze trim; outside screw and yoke; and flanged end connections

E. Shut-off vales for fuel oil shall be:

2" and

Smaller

Ball Valves: 400 psi WOG;

full port, three piece

Apollo construction; bronze body

Watts bronze ball valve; teflon seats; and threaded ends

F. All butterfly valves 8 inch and larger shall be provided with gear driven handwheels.

G. All valves, manually operated, 6 inches and larger located 8 feet or more above the finish floor elevation shall be installed with their spindles horizontal and provided with chain wheels. Chains shall loop within 4 feet of finish floor. Provide holding clips to secure chains when the valve is not being used.

2.14 DIAL TYPE PRESSURE GAUGES

A. General: Case constructed of brass or cast aluminum, back flange for surface mounting, flangeless for remote mounting, rattle-proof glass window held in place with an "O" ring and screwed ring, black scale graduations on a white background and adjustable pointer. Socket and tip to be stainless steel or brass, threaded 1/4" NPT. Bourdon tube to be phosphor bronze or stainless steel with brass movement. Gauge to be 4-1/2" diameter. Provide pulsation dampener. Units for all pressure gauges shall be in English (psi).

1. Pumps: Range selected so that suction pressure is above lower 20% and discharge pressure is below upper 20% of scale. Both suction and discharge scale ranges shall match.

2. Bladder Expansion Tank: Range shall be 0 to 60 psig.

3. Pressure Reducing Valves at Make-up Water Station: Range shall be 0 to 100 psig.

4. Steam: Range shall be 0 to 200 psig for high pressure steam, 0 to 100 psig for low pressure steam. Provide 1/4" steel syphon for each gauge.

5. Fuel Oil Suction Piping: Range shall be 30"-0-15 psi.

6. Manufacturers: Dial type pressure gauges shall be manufactured by Ashcroft, Trerice, Weksler, Weiss, or Moeller.

2.15 SEPARABLE SOCKET WELLS

A. Provide for all thermometers and control bulbs mounted in piping. Wells shall be constructed of brass or stainless steel, be furnished complete with screwed cap and shall have lagging extension. Wells shall be suitable for 3-1/2" stems. Where wells are installed in straight runs of pipe smaller than 2-1/2", increase pipe size to 2-1/2" for minimum 4" either side of well. Wells shall be installed at 45 degrees or greater above horizontal and be filled with SAE 10 W oil.

2.16 STEM TYPE THERMOMETERS

A. General: Adjustable angle industrial type constructed of brass or cast aluminum case, rattle-proof glass window, black scale graduations and red reading mercury tube. Stem to be constructed of brass or stainless steel, with 3/4" thread for use with separable socket well. Scale to be 7" long with 3‑1/2" long stem.

1. Ranges:

a. Steam: 50 to 400 degrees F in 2 degree divisions

b. Boiler Feed Water: 30 to 300 degrees F in 2 degree divisions

c. Hot water: 30 to 240 oF in 2 degree divisions

2. Manufacturers: Stem type thermometers shall be manufactured by Ashcroft, Trerice, Weksler, Weiss, or Moeller.

2.17 PRESSURE - TEMPERATURE PLUGS

A. Pressure temperature plugs shall be solid brass having a double Nordel seat suitable for temperatures of 275F and 500 PSI., each plug shall have a color coded cap retainer for easy identification, (Yellow for Nordel, Blue for Neoprene). Plugs shall be #110 (1/4") or #710(1/2") "Pete's Plug II" as manufactured by Peterson Equipment Co.

2.18 FLEXIBLE PIPE CONNECTORS

A. Corrugated T321 stainless steel inner tubing with stainless steel wire braid outer shield; MPT through 2-inches; ASA 150 lb. forged steel flanges 2-1/2-inches and above; 145 pound minimum working pressure at 250 degrees F; not less than four pipe diameters in length.

B. Manufacturers: Keflex "KFCB", Metraflex "ML"; BOA B3-1; Flexonics "PCS"; Southeastern "SEC"; Wheatley "SS".

2.19 IDENTIFICATION OF PIPING

A. Piping shall be labeled with "Opti-Code" pipe markers by Seton or equal. Markers shall indicate pipe content and flow direction with arrows. Markers shall comply with ANSI A13.1. Refer to legend below. Contractor shall comply with the most current codes or as directed by the C.O.

B. Install pipe markers every 15' and within 2' of each tee branch and valve and at least once in each room including mechanical rooms.

PRIVATE

SYSTEM

2.20 GAUGE COCKS

A. 300 WOG, threaded bronze body, bronze stem and seat, lever handle.

T-255B

IB-412

362E

B-66

2.21 VALVE TAGS

A. Provide valve tags for all valves (domestic water, and HVAC.

B. Designation: The number of each valve shall be stamped in 1/2" high letters and shall be black-filled.

C. Material: Valve tags shall be manufactured from 19 gauge brass and shall be 2" in diameter with a brass "S" hook and brass "jack chain" to fasten to valve.

D. Valve Chart: Contractor shall furnish a valve chart listing all valves by number with location, type of service, normally open or normally closed, and shut off or balance. Frame valve chart under plastic (plexiglass) and mount as directed by the Government.

E. Valve tags shall be manufactured by Seton Identification Product or prior approved equal.

2.22 BALANCE VALVES

A. General: Install balance valves where indicated. These calibrated valves shall be provided with memory stop, calibrated nameplate, positive shut-off design, drain/purge connection, schraeder valves for differential pressure readout across valve seat area and molded insulation jacket to protect valve, maintain accessibility and prevent sweating. Valve body shall be bronze with brass ball construction with glass and carbon filled TFE seat rings. Valves shall be provided with NPT connections and rated at 300 psig at 250 degrees F.

B. Manufacturers: Balance valves shall be model CB as manufactured by Bell & Gossett or equal by Taco or Armstrong or series 'BV' by Wheatley or Watts CSM series.

2.23 CHECK VALVES (FOR CHILLED WATER, CHEMICAL FEED AND DOMESTIC WATER SERVICE)

Check Valves: 200 psi WOG, horizontal swing 2" and smaller; regrinding type, renewable discs, Y-pattern, solder ends.

2-1/2" and larger; bolted bonnet, renewable seat and discs, flanged ends.

2.24 CHECK VALVES (FOR STEAM AND BOILER FEEDWATER)

Check Valves: 2" and smaller, 200 PSI steam, Class 200, bronze body, horizontal swing, Y-pattern, regrinding renewable discs, teflon seat and threaded ends.

Check Valves: 2-1/2" & larger, Class 300, cast steel body conforming to ASTM A216 grade Powell

WCB steel, bolted cap, swing Velan check with stainless steel trim and renewable seats and flanged ends.

Use 125 lb class, wafer type with iron body, bronze seat and disk, and SS spring for chilled water.

2.25 WYE STRAINERS

A. Wye type same size as entering pipe with removable screen; 2-1/2" and larger, flanged; 2" and smaller, screwed. Rating 125 psig. Screens shall be easily removable. Provide blowdown valve with hose connection and cap on strainers 2" and larger.

B. Steam: 1/32-inch diameter perforated brass screen.

C. Chilled Water: 3/64" diameter perforated brass screen.

Cold Water: 3/64-inch diameter perforated brass screen.

Fuel Oil: 1/32-inch diameter perforated stainless screen.

Natural Gas: 1/32-inch diameter perforated brass screen

D. Remove screens from strainer after approximately 60 hours operating time, clean, and reinstall.

E. Manufacturers: Griswold, Mueller, Hoffman, Metraflex, Keckley, Watts, or Wheatly.

2.26 GRAVITY STORM DRAIN PIPING, BURIED:

A. PVC Pipe: ASTM D2241, SDR-200 with compression joints. Fittings: ANSI/ASTM D2466 schedule 40 PVC, Drainage pattern. Joints: Push type on piping and ASTM D2855 solvent weld at fittings.

2.27 140F HOT, 120F HOT, COLD AND RECIRCULATING WATER PIPING, ABOVE GRADE

A. Copper Tubing: ASTM B88 type 'L' hard drawn. Fitting: ANSI/ASME B16.9 pressure pattern wrought copper. Joints: ANSI/ASTM B32 Lead free solder, having a composition of 95.5% tin, four (4) percent copper and 0.5% silver.

B. On piping two (2) inches and larger, the contractor has the option of using grooved couplings and grooved fittings as manufactured by Victaulic.

C. In lieu of manufactured copper tee fittings, the contractor has the option of using mechanically formed tee connections. Mechanically formed tees shall conform to the following:

1. Mechanically extracted collars shall be formed in a continuous operation consisting of drilling a pilot hole and drawing out the tube surface to form a collar having a height of not less than three (3) times the thickness of the tube wall. The collaring device shall be fully adjustable as to insure proper tolerance and complete uniformity of the joint.

2. The branch shall be notched to conform with the inner curve of the run tube and dimpled to insure penetration of the branch tube into the collar is of sufficient depth for brazing and that the branch tube does not obstruct the flow in the mainline tube. Dimples shall be in line with the run of the tube and visible through the braze. All joints shall be brazed with BCUP-2 braze. The method shall be provided by T-drill®.

2.28 AIR CONDITIONING CONDENSATE PIPING

A. Copper Tubing: ASTM B88 type "L" hard drawn copper tubing. Fittings: Sweat type, wrought copper. Joints: Lead free solder as specified herein. Slope piping a minimum of 1/4 inch per one (1) foot of run. Provide full size drain piping with minimum three (3) inches deep (water seal) open (cleanable) trap at each cooling coil, discharging at nearest drain or plumbing system connection provided.

2.29 DOUBLE WALL FIBERGLASS PIPING

A. Provide and install for all exterior fuel oil supply piping (up to three (3) feet upstream of pump suction connection), exterior fuel oil piping up to connection at tank and drain piping as indicated on the drawings, double wall fiberglass (contained) piping system. Each contained piping system shall consist of UL FRP primary piping system supported within a UL FRP secondary containment housing. Each system shall be provided with suitable drains and vents and be designed to provide complete drainage of both the primary and secondary containment piping. Interstitial supporting devices shall be made from molded Polypropylene spider pipe clips and shall be provided within the secondary containment pipe, and shall be designed to allow continuous drainage in the annular space to the drain points. Drain fittings shall be designed to allow a valve attachment to be made so that the secondary containment compartment may be readily drained and manually checked for leaks.

B. Materials:

1. The primary pipe and fittings shall be manufactured from FRP materials as listed by ASTM and ANSI.

2. The secondary containment pipe and fittings shall be UNSPLIT, UL FRP.

3. All listed primary pipe and containments shall be UL FRP materials tapered socket ends. All listed pressure fittings shall be UL FRP socket ends. All other unlisted components that are intended for use as pressure retaining components shall have sufficient thickness and reinforcement so as to be able to maintain the same pressure ratings as the equivalent UL FRP pipe.

4. Interstitial supporting devices used to center and support the primary piping within the secondary containment piping shall be manufactured from molded Polypropylene spider pipe clips, according to ASTM and ANSI.

5. All listed secondary containment pipe and fittings shall meet ASTM specifications D‑2310, D‑2992, D‑2996 & MIL 29206. Containment Fittings shall have carrier components preassembled, supported and tested. Mitered pipe shall not be permitted. Carrier fittings shall be socket type ready for field assembly. Containment fittings shall have spigot ends to allow for an unsplit closure coupling to be installed after primary system is pressure tested. All other unlisted components that are intended for use as pressure retaining components shall have sufficient thickness and reinforcement so as to be able to maintain the same pressure ratings as the equivalent (unsplit) UL FRP pipe and fittings.

6. All fittings shall be pre‑assembled and pre‑tested by the manufacturer. Basis of design manufacturer is Guardian Systems Division of NIBCO, Inc.

2.30 SPACE HEATING HOT WATER PIPING, CHILLED WATER PIPING - ABOVE GRADE, CONDENSER WATER PIPING, REFRIGERANT RELIEF PIPING, WATER COOLED OIL COOLER PIPING, AND CHEMICAL CLEANER PIPING:

A. Steel Pipe: ASTM A53 or A120 , Schedule 40 black. Fittings: ANSI/ASME B16.3, malleable iron, Class 125 or ASTM A234, Class 125 forged steel butt weld type or malleable iron grooved rate for 450 psi at 200F. Joints: Screwed for pipe two (2) inches and smaller ANSI/AWS D1.1, welded or roll-grooved for pipe two and one-half (2-1/2) inches and larger. Field wrap all damaged pipe fittings with a double layer, half lapped, ten (10) mil polyethylene tape.

B. Nipples: All thread nipples are prohibited. Nipples 1-1/2 inches and smaller in diameter and attached to larger pipes shall be Schedule 80 and shall be attached with the use of Threadolets or Weldolets.

C. Flanges: Provide flanged ends on 2-1/2 inches and larger piping at connection to all valves, piping specialties and equipment connections. Provide union at piping two (2) inches and smaller.

D. Elbows: Long radius elbows shall be used except where space restrictions absolutely dictate the use of short radius type. Mitered piping elbows are prohibited.

E. Weldolets and Threadolets: Weldolets and Threadolets may be used for side outlet reducing tees only if the branch is more than two (2) pipe sizes smaller than the main. Reducers and increasers in horizontal piping shall be eccentric type, installed with the tops level to facilitate air removal. Reducers and increasers in vertical piping shall be concentric type.

2.31 FUEL OIL SUPPLY, RETURN AND TANK FILL PIPING: (Applies to fuel oil supply/return piping routed indoors, routed within three (3) feet of pump suction connection and all fuel tank fill piping):

A. Steel Pipe: ASTM A53 or A120 , Schedule 40 black. Fittings: ANSI/ASME B16.3, malleable iron, Class 125 or ASTM A234, Class 125 forged steel butt weld type or malleable iron grooved rate for 450 psi at 200F. Joints: Screwed for pipe two (2) inches and smaller ANSI/AWS D1.1, welded or roll-grooved for pipe two and one-half (2-1/2) inches and larger. Field wrap all damaged pipe fittings with a double layer, half lapped, ten (10) mil polyethylene tape.

B. Nipples: All thread nipples are prohibited. Nipples 1-1/2 inches and smaller in diameter and attached to larger pipes shall be Schedule 80 and shall be attached with the use of Threadolets or Weldolets.

C. Flanges: Provide flanged ends on 2-1/2 inches and larger piping at connection to all valves, piping specialties and equipment connections. Provide union at piping two (2) inches and smaller.

D. Elbows: Long radius elbows shall be used except where space restrictions absolutely dictate the use of short radius type. Mitered piping elbows are prohibited.

E. Weldolets and Threadolets: Weldolets and Threadolets may be used for side outlet reducing tees only if the branch is more than two (2) pipe sizes smaller than the main. Reducers and increasers in horizontal piping shall be eccentric type, installed with the tops level to facilitate air removal. Reducers and increasers in vertical piping shall be concentric type.

2.32 REFRIGERANT PIPING

Copper Tubing: ASTM B 280, Type 'L' ACR hard drawn copper tubing evacuated, charged with dry nitrogen and capped. Fittings: ANSI/ASME B 16.22 pressure pattern wrought copper. Joints ANSI/AWS A5.8 BCUP3 silver (minimum five (5) percent) braze.

2.33 REFRIGERANT SPECIALTIES

A. General: Provide and install refrigerant specialties specified below unless provided by the air conditioning equipment manufacturer as an integral part of his equipment. Line valves/charging valves shall be furnished integral with equipment.

B. Thermostatic Expansion Valves: Brass body, stainless steel/model seat, hastelloy/stainless steel pin, stainless steel diaphragm, strainer external equalizer and solder/solder-flange connections. All working parts shall be accessible with replaceable thermostatic cement. Valves shall be manufactured by Alco, Henry or Sporlan.

C. Solenoid Valves: Brass/bronze/steel case body, pilot port operated, synthetic to metal main and pilot port seating, solder ends and electric junction box. Valve shall be operable in any position and shall be UL approved. Solenoid valves shall be manufactured by Alco, Henry or Sporlan.

D. Filter Driers: Welded steel shell with removable or permanent core brazed ends, with cadmium plated mounting bracket. Core shall be capable of removing moisture, acids and foreign matter from refrigerant circuit. A filter drier shall be installed in each refrigerant circuit in the main liquid line. Filter driers shall be manufactured by Alco, Henry or Sporlan.

E. Sight Glasses: Body and fittings shall be steel, copper brazed together and then copper plated. Sight glass shall allow viewing of refrigerant liquid, have an indicator for indication of moisture in the refrigerant liquid and have a protective cap. Sight glass shall be installed in liquid lines up to 2-1/8 inches OD and in bypass line on larger lines. Sight glasses shall be manufactured by Alco, Henry or Sporlan.

2.34 CONDENSATE PUMPING UNIT

A. General: Furnish and install a duplex unit as shown on the drawings. The unit shall consist of a cast iron receiver, two (2) water pumps, a NEMA 2, U.L. listed control cabinet for wall mounting, and all accessories as hereafter specified. The condensate pumping unit shall be manufactured of close grained cast iron. The unit shall be furnished with a water level gauge, pressure gauges for pump discharge, bronze fitted isolation butterfly valves between pump and receiver, and two (2) lifting eye bolts. Unit shall be sized for one (1) minute net storage. Unit shall have an inlet, vent and an overflow opening to provide a means of secondary venting. A cast iron inlet strainer with vertical self-cleaning bronze screen and large dirt packet shall be mounted on the receiver. The screen shall be easily removable for cleaning, requiring no additional floor space for servicing.

B. Pumps: The centrifugal water pump shall be flange mounted on the receiver. Pumps shall be closed coupled vertical design, permanently aligned, bronze fitted and be equipped with stainless steel shaft, enclosed bronze impeller, renewable bronze case ring, and 250 degrees mechanical shaft seal. Each pump shall be close coupled to a vertical drip motor. Pump capacities, motor HP and RPM, electrical characteristics and receiver size shall be as scheduled on the drawings.

C. Control Cabinet:

1. Magnetic Starters: Magnetic starters shall be furnished in consolidated control cabinets (NEMA 2, U.L. listed) to comply with NEMA or JIC specifications. Combination magnetic starters with circuit breaker type disconnect switches shall be provided. All disconnect devices are furnished with cover interlock. Starters shall be provided with overload relays as standard for the protection of all windings of single phase motors against open circuit and/or unbalanced conditions. Starters shall have overload relays which can be manually reset. A starter shall be capable of interrupting ten (10) times motor full load current. Circuit breaker must be installed ahead of the starter to clear any faults that may occur to protect the line wiring.

2. Selector Switches: Selector switches shall be furnished with "Off-Hand-Auto" positions. Electric alternator control (lead-lag) shall consist of two (2) magnetic starters. This control provides for automatic selection of the active pump and automatic operation of the inactive or lag pump if the lead pump or its control fails.

3. Electric Motors: Vertically mounted drip proof ball bearing type. Motor shall be single phase with electrical characteristics indicated on electrical drawings.

D. Assembly: Entire condensate pumping unit shall be factory piped and wired.

E. Manufacturers: Basis of design manufacturer is Domestic Pump (ITT). Equal products by other manufacturers are acceptable provided they meet all requirements specified herein.

2.35 BOILER FEEDWATER UNIT

A. General: Furnish and install a duplex unit as shown on the drawings. The unit shall consist of a cast iron receiver, two (2) water pumps, a water make-up assembly, a NEMA 2, U.L. listed control cabinet for wall mounting, and all accessories as hereafter specified. The boiler feedwater unit shall be manufactured of close grained cast iron. The unit shall be furnished with a water level gauge, pressure gauges for pump discharge, bronze fitted isolation butterfly valves between pump and receiver, and two (2) lifting eye bolts. Unit shall be sized for five (5) minutes net storage based upon the boiler evaporation rate. Unit shall have an inlet, vent and an overflow opening to provide a means of secondary venting. A cast iron inlet strainer with vertical self-cleaning bronze screen and large dirt packet shall be mounted on the unit. The screen shall be easily removable for cleaning requiring no additional floor space for servicing.

B. Make-Up Station: A water make-up assembly shall be factory installed on the receiver of capacity equal to one (1) boiler feed pump. The assembly shall consist of a level control switch and solenoid electric valve. The valve shall be packless, piston pilot-operated type with cushioned closing feature and epoxy resin molded water proof coil. The valve shall be equipped with a strainer, and a manual bypass around the valve.

C. Pumps: The centrifugal water pump shall be flange mounted on the receiver. Pumps shall be closed coupled vertical design, permanently aligned, bronze fitted and be equipped with stainless steel shaft, enclosed bronze impeller, renewable bronze case ring, and 250 degrees mechanical shaft seal. Each pump shall be close coupled to a vertical drip motor. Pump capacities, motor HP and RPM, electrical characteristics and receiver size shall be as scheduled on the drawings. Each pump gpm shall be sized for two (2) times the boiler evaporation rate.

D. Control Cabinet:

1. Magnetic Starters: Magnetic starters shall be furnished in consolidated control cabinets (NEMA 2, U.L. listed) to comply with NEMA or JIC specifications. Combination magnetic starters with fusible disconnect switches or circuit breakers shall be provided. All disconnect devices are furnished with cover interlock. Starters shall be provided with overload relays as standard for the protection of all windings of single phase motors against open circuit and/or unbalanced conditions. Starters shall have overload relays which can be manually reset. A starter shall be capable of interrupting ten (10) times motor full load current. Fuses or a circuit breaker must be installed ahead of the starter to clear any faults that may occur to protect the line wiring.

2. Selector Switches: Selector switches shall be furnished with "Off-Hand-Auto" positions. Automatic sequence control (lead-lag) shall consist of electric alternator used in conjunction with two (2) magnetic starters. This control provides for automatic selection of the active pump and automatic operation of the inactive or lag pump if the lead pump or its control fails.

3. Electric Motors: Vertically mounted drip proof ball bearing type. Motor shall be single phase with electrical characteristics indicated on electrical drawings.

4. Provide for connection to boiler level controller to start/stop pumps to feed boiler.

E. Assembly: Entire boiler feedwater unit shall be factory piped and wired.

F. Manufacturers: Basis of design manufacturer is Domestic Pump (ITT). Equal products by other manufacturers are acceptable provided they meet all requirements specified herein.

2.36 RELIEF VALVE DISCHARGE PIPING

A. Utilize same piping specified as the medium being discharged.

2.37 UNIONS, COUPLINGS AND JOINTS

A. Shouldered Pipe End Couplings: Malleable iron housing clamps to engage and lock, designed to permit some angular deflection, contraction and expansion; "C" shape composition sealing gasket; steel bolts, nuts, and washers; galvanized couplings for galvanized pipe.

2.38 SHUT OFF VALVES

A. Shut off valves for underground natural gas piping shall be as specified in Section 02320.

B. Valve Box: Valve box of cast iron not less than 3/16 inch thick shall be installed at each underground valve. The valve box shall be provided with locked-type covers that require special wrench for removing. The word "GAS" shall be cast in the cover. The top of the box shall be in a concrete slab 18 inches square and set flush with finished grade. Box shall be adjustable extension type with screw or slide type adjustments. Provide Government with a wrench for opening boxes.

C. Shut-off valves for the fuel oil tank fill line shall be:

1. Plug Valves: Four (4) inches and smaller; non-lubricated minimum 300 psi WOG API; full port; alloy steel stem; flanged ends; wrench operated with position indicator.

2.39 SUCTION DIFFUSERS:

A. Flanged angle type body with inlet vanes and combination diffuser/strainer/orifice cylinder with 3/16 inch diameter openings for pump protection. Provide a removable, permanent magnet in the flow stream and disposable fine mesh strainer to be removed after system start-up. Provide adjustable support foot to carry weight of the piping. Provide at suction inlet to each base-mounted pump. Suction diffusers shall be manufactured by Bell & Gossett, Thrush, Armstrong, Mueller, Amtrol, Wheatley, or Taco.

2.40 BASKET STRAINERS

A. Duplex basket type, same size as entering pipe with removable cover. Size two (2) inches and smaller, screwed, size 2-1/2 inches and larger, flanged. Rating 285 psig WOG. Provide cast iron construction with stainless steel screens and stainless steel diverter valve. Provide machined seat for basket alignment.

2.41 FLEXIBLE PIPE SPHERICAL CONNECTORS

A. Spherical connector shall be constructed of neoprene and nylon with bias ply tire cords, complete with steel plate flanges tapped or drilled to mate with 150 lb. flanges. Connectors shall be capable of controlling compression, elongation, lateral and angular movement. Temperature range 20 degrees F to 240 degrees F. Flexible pipe connectors shall be manufactured by Metraflex, Keflex, Belmont, Garlock, Southeastern Hose or Wheatley.

2.42 EXPANSION TANK

A. Bladder type with steel shell designed and constructed in accordance with ASME Section VIII. Bladder shall be removable (where indicated) for inspection and shall be fabricated from heavy duty butyl rubber. Tank shall be ASME stamped for working pressure of 125 psig and maximum operating temperature of 240F. Provide schraeder valve for charging purposes. Expansion tanks shall be manufactured by Taco, Amtrol, Thrush, Wood, Wheatley or Bell and Gossett.

2.43 AIR SEPARATORS

A. Combination tangential type air separator and system strainer. Units to have internal perforated stainless steel air collector tube to direct released air into the high capacity automatic air vent. A blow-down connection shall be provided for routine cleaning. Units shall be constructed in accordance with ASME and stamped for 125 lb. working pressure. Refer to Section 15260 for insulation requirements. Air separators shall be manufactured by Bell and Gossett, Taco, Amtrol, Thrush, Wood, Wheatley or Armstrong.

2.44 TRIPLE-DUTY VALVES

A. Flanged straight type or angle type body as indicated with combination non-slam type check valve/isolating valve/balancing valve. Provide external operating stem, with memory stop for balancing purposes. Provide at discharge of each base mounted pump. Triple-duty valves shall be manufactured by Bell & Gossett, Armstrong, Mueller, Amtrol, Taco or Wheatley.

2.45 AUTOMATIC AIR VENTS

A. All brass construction with ball check to prevent air re-entry. Suitable for pressures to 75 psig and temperatures to 250 degrees F.

PRIVATE

Hoffman

Maid-O-Mist

2.46 "HIGH CAPACITY" AUTOMATIC AIR VENTS

A. Cast iron or brass construction with stainless steel, brass, EPDM and silicone rubber internal components. Provide float action pilot operation for instant venting of air. Suitable for pressures to 150 psig and temperatures to 250 degrees F. Provide 1/8 inch tapping for drain connector.

PRIVATE

Bell & Gossett

Wheatley

2.47 PIPING HEATER CABLES

A. General: Furnish and install electric pipe heating cables consisting of either (1) sheathed resistor wire designed for use to prevent from freezing. The cables shall be complete with built-in thermostats and cold lead with cord and plug. Cable, thermostat and plug shall come as a complete package and shall be UL listed; or (2) the self regulating heater shall consist of two (2) 16 AWG nickel coated-copper bus wires embedded in parallel in a self-regulating polymer core that varies its power output to respond to temperature all along its length, allowing the heater to be crossed over itself without overheating, to be used directly on plastic pie, and to be cut to length in the field. The heater shall be covered by a radiation cross-linked modified polyolefin dielectric jacket. Power connection, end seal, splice and tee kit components shall be applied in the field. The system shall be controlled by an ambient sensing thermostat. Cables shall be installed under the insulation. The contractor shall use only the type mastic with insulation on heated lines that is compatible with the heating cable insulation. Provide power wiring and waterproof metallic flex conduit/connectors from end of heat tape up to junction boxes shown on electrical drawings.

B. Protected Lines: The following lines exposed outside shall be freeze protected:

1. Make up water piping routed outdoors.

C. Manufacturers: The water line cables shall be manufactured by Electromode, Indeeco, Easy Heat, Thermon, Q-Mark, or Raychem.

2.48 IDENTIFICATION OF PIPING OTHER THAN STEAM

A. Piping shall be labeled with snap-on pipe markers equal to Seaton "Setmark" pipe markers. Colors and legend shall be:

PRIVATE

System

Color Letter Color

A. Height of letters shall be:

PRIVATE

Outside Diameter* Letter Height

*Outside insulation on insulated piping.

A. Install pipe markers every 15 feet and within two (2) feet of each tee branch and valve and at least once in each room including mechanical rooms.

2.49 CHEMICAL TREATMENT SYSTEM, STEAM PIPING SYSTEMS

A. General: Provide and install a water treatment system for each steam boiler system. Provide water treatment systems as indicated on the drawings and specified herein.

B. Manufacturers: The water treatment chemical service supplier shall be recognized specialist whose major business is in the field of water treatment. The supplier shall have been active in the field of industrial water treatment for at least ten (10) years and shall have a fully staffed laboratory, development facility, service department, full-time technical service representatives and area backup personnel.

1. Sample Cooler: Provide a sample cooler for each steam boiler, each feedwater, and for condensate from at least one (1) heat exchanger, rated at 750F, 2500 psi stainless steel coil and 250 psi shell.

2. Injection Nozzle: Provide a 304 stainless steel injection nozzle for each separate chemical injection point.

3. Test Equipment: Provide equipment and solutions to verify control parameters and determine pH, alkalinities, total hardness, chlorides, scale inhibitor residuals and oxygen scavenger.

4. Pretreatment: Each steam boiler shall be thoroughly flushed out with cleaning chemicals designed to remove…