H04.REV

STEAM SYSTEMS

NOTE: FINAL DATE: JUNE, 1988.

NOTES: THIS SECTION SHALL BE USED ONLY FOR THE FOLLOWING STEAM SYSTEMS HPS - HIGH PRESSURE STEAM UP TO 225 PSIG MPS - MEDIUM PRESSURE STEAM FROM 16 TO 100 PSIG LPS - LOW PRESSURE STEAM UP TO 15 PSIG INCLUDE IN "AUTOMATIC CONTROL SYSTEMS" SECTION, PNEUMATIC PIPING CONNECTIONS FOR PARALLEL TYPE PRESSURE REDUCING VALVE STATIONS. NEW YORK CITY CODE DEFINES HIGH PRESSURE STEAM "PIPING SYSTEM OPERATING ABOVE FIFTEEN (15) PSI"

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work in this Section includes the providing of labor, materials, equipment and services necessary for a complete and safe installation in accordance with the contract documents and all applicable codes and authorities having jurisdiction for the following

1.	Piping.

2.	Fittings.

3.	Valves.

4.	Traps.

5.	Pressure reducing valve stations.

6.	Flash tanks.

7.	Convertors.

8.	Condensate coolers.

9.	Condensate meters.

10.	Condensate return pumps.

11.	Vacuum return pumps.

12.	Unit heaters.

13.	Deaerator.

14.	Packaged blow-down system.

15.	Steam flow meters.

16.	Valves for radiation system.

17.	Finned tube radiation.

18.	Convectors.

19.	Unit heaters.

20.	Cabinet heaters.

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION NO. 1 and Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK apply to all work in this Section

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY THE ITEMS OF THESE SECTIONS DIRECTLY AFFECTING WORK OF THIS SECTION

B.	Related work in the following Sections:

1.	PIPING.

2.	BOILER PLANT - GAS FIRED.

3.	BOILER PLANT - OIL FIRED.

4.	INSULATION.

5.	MOTORS.

6.	MOTOR CONTROLLERS.

7.	AUTOMATIC CONTROL SYSTEM.

8.	THERMOMETERS, GAUGES, AND METERS.

9.	-----.

3)	REFERENCE STANDARDS

A.	Published Specifications' standards, tests or recommended methods of trade, industry or governmental organizations apply to work in this Section

B.	Comply with all applicable national, state and local codes and refer to Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK for additional Reference Standards

4)	QUALITY ASSURANCE

A.	Refer to Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK for Guarantee and other Quality Assurance requirements

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE REFERENCES ONLY DIRECTLY AFFECTING WORK OF THIS SECTION

5)	SUBMITTALS

A.	Submit shop drawings and product data for the following:

1.	Traps: Catalog cuts and application schedule for equipment

2.	Safety valves.

3.	Sound diffractors.

4.	Pressure reducing valve stations: Catalog cuts, CV-Factor performance data, piping layouts and wiring diagrams

5.	Condensate return and vacuum pumps: Certified drawings and wiring diagrams, receiver tank, pump performance curves

6.	Convertor, Manufacturer's Test Certificate.

7.	Condensate cooler, Manufacturer's Test Certificate.

8.	Condensate meter.

9.	Direct radiation: Catalog cuts of elements and enclosures and application schedule

10.	Valves for direct radiation.

11.	Unit heaters.

12.	Cabinet type unit heaters.

13.	Deaerator: Certified drawings and Manufacturer's Test Certificate

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

A.	Traps: Armstrong Machine Works, Dunham-Bush Inc., Sarco Co. Inc., Hoffman Specialty, ITT Fluid Handling Div. and American Air Filter Co. (Illinois)

B.	Pressure reducing valves:

1.	Pneumatic type: Fisher Governor Co., Leslie Co. and Mason-Nielan Div., McGraw Edison Co

2.	Self-contained type: Fisher Governor Co., Mason-Nielan Div., McGraw Edison Co., Ieslie Co., Sarco Co. and D'Este

3.	Air-loaded type: Leslie Co., Fisher Governor Co. and Mason-Nielan Div., McGraw Edison Co

C.	Condensate return pumps - High Temperature: Cochrane Enviromental Systems, Crane Co., Domestic Pump, ITT Fluid Handling Div., Dunham-Bush, Inc. and Webster Electric Co., Sta-Rite Industries (Skidmore)

D.	Condensate return pumps - Low Temperature: Hoffman Specialty, ITT Fluid Handling Div., Domestic Pump, ITT Fluid Handling Div., Sarco Co., Inc., Dunham-Bush Inc. and Webster Electric Co., Sta-Rite Industries (Skidmore)

E.	Vacuum pumps: Hoffman Specialty, ITT Fluid Handling Div., Domestic Pump, ITT Fluid Handling Div., Sarco Co., Inc., Dunham-Bush, Inc. and Webster Electric Co. Sta-Rite Industries (Skidmore)

F.	Convertor: Bell and Gossett, ITT Fluid Handling Div., Patterson-Kelley Co. Inc. and Whitlock Mfg. Co

NOTE: FOR SPECULATIVE PROJECTS, INCLUDE THE FOLLOWING MANUFACTURERS

1.	Sims Co., Taco Heater Co. and Yula Corp.

G.	Condensate cooler: Bell and Gossett, ITT Fluid Handling Div., Patterson-Kelley Co. Inc. and Whitlock Mfg. Co

NOTE: FOR SPECULATIVE PROJECTS INCLUDE THE FOLLOWING MANUFACTURERS

1.	Sims Co., Taco Heater Co. and Yula Corp.

H.	Safety relief valves: Consolidated, Kunkle and Lonergan.

I.	Exhaust head: Crane Co. Swartwout Division, Zurn Industries, Inc

J.	Drip pan elbow: Kunkle Valve Co., and ITT, Grinnell Corp.

K.	Diffractor: Boylston.

L.	Steam separator: Anderson IBEC, Centrifix and Cleaver-Brooks

M.	Packaged blowdown system: Sentry Equipment Company, Industrial Steam and Cleaver-Brooks

N.	Deaerator: Industrial Stream, Inc., Domestic Pump ITT, Cleaver-Brooks and Kewanee Boiler Corp

O.	Finned tube radiators: Dunham - Bush Inc., Sterling Radiator Co., Trane Co. and Vulcan Radiator Co

P.	Convectors: Trane Co., Dunham - Bush Inc., Sterling Radiator Co. and Governale Bros. Inc

Q.	Valves for radiators and convectors: Crane Co., Dunham-Bush Inc., Sarco Co. Inc. and Hoffman Specialty, ITT Fluid Handling Div

R.	Unit heaters: L.J. Wing Mfg. Co., Modine Mfg. Co., McQuay Inc., Trane Co. and Young Radiator Co

S.	Unit heaters - cabinet type: American Air Filter Co. Inc., McQuay Inc., Modine Mfg. Co. and Trane Co

2)	PIPING

A.	Refer to Section PIPING for:

NOTE: LIMIT STEAM PRESSURE TO MAXIMUM 225 PSIG. IN NEW YORK CITY HIGH PRESSURE STEAM IS ABOVE 15 PSI. EDIT

1.	High pressure steam above 100 psig.

2.	High pressure condensate return and drip.

3.	Medium pressure steam 16 to 100 psig.

4.	Medium pressure condensate return and drip.

5.	Condensate pump discharge.

6.	Low pressure steam up to 15 psig.

7.	Low pressure condensate return and drip.

8.	Condensate pump discharge.

B.	Valves, fittings, flanges, joints, and accessories shall be as follows

NOTE: USE IF STEAM PRESSURE LIMIT IS 100 PSI.

PRESS

1.	Minimum (125 lb) wsp except:

a.	Welded fittings shall be as specified under Section "PIPING"

NOTE: USE IF STEAM PRESSURE LIMIT IS TO 175 PSIG.

2.	Minimum 200 lb wsp except:

a.	Welded fittings shall be as specified under Section "PIPING"

NOTE: USE IF STEAM PRESSURE LIMIT IS TO 225 PSIG.

3.	Minimum 250 lb wsp except:

a.	Welded fittings shall be as specified under Section "PIPING"

PRESS

C.	Piping between primary and secondary pressure reducing valves shall be as specified for high pressure steam systems

NOTE: CHECK WITH ABSORPTION MACHINE MANUFACTURER WHETHER FLOAT AND THERMOSTATIC TRAPS OR INVERTED BUCKET TRAPS SHOULD BE SPECIFIED

3)	STEAM TRAPS

A.	Traps with a working pressure shall be as follows:

1.	250 psig for high pressure systems; above 100 psig.

2.	125 psig for low and medium pressure systems; up to 100 psig

3.	Other.

B.	Traps with ratings at main drips shall be based on the following

1.	300 percent of maximum load, except 400 percent for absorption machines

2.	Condensate at steam temperature.

3.	Pressure differential across trap at maximum capacity:

a.	Preheaters: 1/4 psig.

NOTE: REVIEW REQUIREMENTS FOR HOSPITAL OR KITCHEN EQUIPMENT.

b.	Other services: 1 psig, except as noted.

4.	Minimum trap size: 1/2 inch.

C.	Thermostatic traps shall be as follows:

1.	Body and cap shall be cast brass, or stainless steel.

2.	Thermostatic element shall be phosphor bronze, monel metal, or stainless steel with balanced pressure corrugated bellows or duplex diaphragm. Thermostatic traps shall be replaceable as unit without field adjustment

3.	Valve head shall be permanently adjusted, self-aligning, stainless steel. Valve seat shall be renewable, sharp edged, stainless steel, similar to Sarco Co.

NOTE: INCLUDE AS APPLICABLE FOR THIS PROJECT. CHECK MANUFACTURERS' CATALOG FOR SPECIFIC TYPES

a.	Low and medium pressure: Types TB-25, T-65.

b.	High pressure shall be Type N-100 or T-125.

D.	Float and thermostatic traps shall be as follows:

1.	Body shall be cast iron. Bellows shall be balanced pressure, bronze, monel metal, or stainless steel. Float shall be stainless or seamless copper. Water valve and seat shall be stainless steel. Valve operating parts shall be double fulcrum type, stainless steel. Automatic air vents shall be multiple bellows, stainless steel valve and seat. Internal parts shall be removable and replaceable without breaking pipe connections. Provide traps similar to Sarco Co. FTB

E.	Float traps as specified for float and thermostatic traps without thermostatic elements, similar to Sarco Type F.

F.	Inverted bucket traps shall be as follows:

BODY

1.	Body and cap shall be cast iron.

NOTE: FOR PRESSURES OVER 250 PSIG, USE CAST STEEL.

2.	Body and cap shall be cast steel.

BODY

3.	Inlet shall be wrought iron. Valve and seat shall be chrome steel. Guide pin assembly, lever, bucket, valve retainer and body thimble shall be stainless steel. Strainer bushing gasket and cover gasket shall be non-asbestos type elastomer. Internal parts shall be removable and replaceable without breaking pipe connections

SIM

4.	Cast iron traps similar to Sarco B1-X.

NOTE: FOR CAST STEEL TRAPS.

5.	Cast steel traps similar to Sarco HM34.

SIM

G.	Thermodynamic traps: (high and medium pressure only). Components including body, cap and disc and operation as follows

1.	Disc shall be the only moving part.

2.	Air and condensate shall be discharged as soon as same reaches trap

3.	Tight shut off at no load condition.

4.	Shall not be used for equipment utilizing modulating control valves

5.	Similar to Sarco Type TD-52.

NOTE: FOR SPECIAL APPLICATIONS ONLY. REVIEW WITH MANUFACTURER.

H.	Liquid Expansion Trap shall be cast semi-steel trap with bronze thermostatic element and stainless steel valve head, seat and washer and with external adjustment. Maximum pressure shall be 350 psig. Traps shall be similar to Sarco No. 871

4)	SAFETY VALVES

A.	Safety valves shall be iron body pop type with bottom guided disc, stainless steel seat disc, exposed stainless steel or cadmium plated steel spring, ASME rated, factory set and sealed at set pressure and discharge elbow and drain pan

B.	pull ring assembly, for testing valves under pressure shall be with galvanized wire cable, pulleys and pull handle

C.	Valves shall be similar to Consolidated No. 1511 or No. 1811.

NOTE: SELECTION OF PRV TYPE AND STATION PIPING CONFIGURATIONS SHOULD BE REVIEWED WITH THE GROUP ENGINEER DIRECTOR. SPECIFICATION SHALL REFLECT ACTUAL REQUIREMENTS OF PRV STATIONS SELECTED. CAREFULLY REVIEW PRV STATION DETAILS BEFORE EDITING THIS SPECIFICATION

5)	PRESSURE REDUCING VALVE STATIONS (PRV):

A.	PRV stations shall be selected and sized for operating pressures and capacities noted and designed for quiet in operation and vibration free under all load conditions

NOTE: REVIEW NOISE AND VIBRATION CONTROL REQUESTS WITH ACOUSTICAL CONSULTANT

1.	Sound diffusers shall maintain acceptable noise levels as noted in Section Noise Control and shall be similar to Boylston Steam Speciality Co

2.	Silencers shall be similar to Quietflo Line Silencers.

3.	Vibration Isolation: Refer to Installation.

B.	PRV shall be pneumatically operated unless noted otherwise, designed for dead end service against full inlet pressure, single seated, normally closed, diaphragm operated and as follows

1.	Valves shall be cast iron body, 250 psig wsp with stainless steel trim and renewable, stellited valve seat

2.	Diaphragms shall be of molded, reinforced noeprene, with uniformally effective area throughout stroke

3.	Guides shall be self-aligning type to align and retain seat ring

4.	Superstructure shall be bolted to bonnet, removable without disturbing stuffing box and suitable for available air pressure

5.	PRV with straight line relationship between valve travel and diaphragm shall be similar to Leslie, Series D.

6.	Alarm switch similar to ASCO Type SC.

NOTE: COORDINATE WITH APPLICABLE DEPARTMENTS.

7.	Automatic operation: Complete system of pneumatic controls for automatic operation, including air piping, air operated pilot and transfer valves, solenoid valves and steam pressure switches. Air source will be from the automatic control system

NOTE: CAPACITY OF EACH PRV SHALL BE SCHEDULED SEPARATELY FOR EACH STATION

a.	Capacity control for parallel PRV stations with capacities of valves shall be as follows

(1)	On increase in load, for loads up to capacity of small valve, large valve closes and small valve opens gradually to open position

(2)	For loads larger than capacity of small valve, pneumatically operated transfer valve closes small valve. Simultaneously and without pulsation in flow, large valve assumes control

(3)	On decrease in load: operation is reverse of above

b.	Two stage systems: Valves shall be sized for capacities and pressu differentials as noted. Capacity control for two stage system shall be as follows:

(1)	Both primary and secondary valves shall be capable of operating at full pressure drop of the PRV station. Upon failure of either valve, the other valve shall automatically assume the full required pressure drop

NOTE: SAFETY SHUTOFF SHOULD BE SPECIFIED ONLY WHERE USE OF SAFETY VALVES VENTED TO THE OUTSIDE ATMOSPHERE ARE NOT PRACTICLE (I.E.: HIGH RISE BUILDINGS) CHECK THAT CORRECT DETAIL IS USED ON DRAWINGS, CHECK LOCAL CODES FOR ACCEPTABILITY

c.	Safety shutoff valve for PRV stations where noted shall be capable of shutting off against full inlet pressure. Safety shutoff controls shall be as follows

(1)	Actuation of high limit steam pressure electric contact switch on low pressure side of respective reducing stations shall actuate 3 way solenoid valves, located between pilot and diaphragm of safety shutoff valve, to relieve air pressure and shut safety shutoff valve tight. Switches shall be manually reset.Electric contact type switches with manual reset, similar to Asco Type SD.

NOTE: FOR SINGLE STAGE SELF CONTAINED PRV STATIONS (DETAIL H-8.1). N.Y. ONLY

C.	Single stage stations, with self-contained PRV: Pressure reducing valves, designed for dead end service, single seated, spring loaded, cast iron body, stainless steel hardened trim and renewable, stainless steel seats and discs. Capacity control shall be self contained and valves shall be similar to Leslie Type GPKP

NOTE: FOR SINGLE STAGE AIR LOADED PRV STATIONS (DETAIL H-8.2). N.Y. ONLY. PNEUMATIC AIR PRESSURE MUST BE AT LEAST 10 PSIG HIGHER THAN THE REDUCED STEAM PRESSURE

D.	Single stage stations with air loaded PRV: Pressure reducing valves, designed for dead end service, single seated, air loaded, cast iron body, stainless steel trim and renewable stellited seats and discs. Capacity control shall be air loaded and valves shall be similar to Leslie Type GPK

NOTE: COORDINATE PRESSURE.

6)	FLASH TANKS

A.	Tank shall be constructed of minimum 3/8 inch thick steel plate, welded, ASME stamped for minimum working pressure of 100 psig and shall be complete with inlet, outlet, vent, gauge glass and as noted

B.	Gauge glass shall be complete with rods and shut off valves.

C.	Inlet connection shall be tangential type for vertical tanks, with 3/8 inch thick wear plate. Size and piping arrangement shall be as noted

D.	Supports shall be structural steel legs secured to concrete pad on floor

NOTE: FOR 2000 THROUGH 50,000 EDR.

7)	CONDENSATE RETURN PUMPS (LOW TEMPERATURE)

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

A.	Condensate pumps shall be packaged duplex unit with centrifugal pumps, motors, pump connected to motor with flexible coupling, pressure gauges at each pump discharge, receiver, automatic controllers, motor controller and disconnect switches. Unit shall be factory assembled, piped and wired ready for final connections

B.	Pumps with cast iron body, bronze enclosed, centrifugal impeller and direct coupled

C.	Capacity shall not be less than noted and with both pumps operating, capacity shall be double

D.	Steel receiving tank shall be complete with suction strainer, automatic alternator, 2 float switches, gauge glass and 9 inch industrial type thermometer

E.	Automatic operation: Float switches shall start and stop pumps. Automatic alternator shall alternate lead pump, automatic operation of both pumps under abnormal load conditions and automatic start of lag pump upon failure of lead pump. Condensate return pump, similar to Domestic Series CC or CS

NOTE: FOR CONDENSATE RETURN PUMPS HAVING fOLLOWING CONDITIONS: CONDENSATE TEMPERATURE EXCEEDS 200 DEG.F. EQUIPMENT TRAPPED. RECEIVER IS VENTED TO ATMOSPHERE (CONDENSATE TEMPERATURE APPROXIMATELY 212 DEG.F). DO NOT USE RECEIVER AS FLASH TANK. PROVIDE SEPARATE VENTED FLASH TANK IF REQUIRED

8)	CONDENSATE RETURN PUMPS (HIGH TEMPERATURE)

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

A.	Condensate pumps shall be packaged duplex unit with centrifugal pumps, motors, pump connected to motor with flexible coupling, pressure gauge at each pump discharge, elevated receiver, automatic controllers, motor controller and disconnect switches. Unit shall be factory assembled, piped and wired ready for final connections as follows

1.	Each pump shall be capable of pumping water at 250 def F at noted capacities. Pump shall not cavitate nor require more than 2 feet NPSH at any head up to 125 percent of noted discharge head.

a.	Pumps shall be complete with mechanical seals suitable for 220 deg F and built in non-slam, spring loaded check valves removable for servicing without disturbing piping connections

b.	Submit capacity-head curve and brake horsepower curve base on 2 feet NPSH suction condition

c.	Pumps similar to Schaub Ultradyne.

2.	Receiver tank shall be constructed of minimum 3/8 inch thick steel plate, welded, of size as noted, complete with 4-1/2 in. diameter cleanout hole and chromasoid lining, warranteed by manufacturer for 10 years, exterior of tank shall be prime coated and finished with abrasion resistant top coat. Support stand for receiver and pumps shall be 3 feet high

3.	Receiver tank shall be complete with 3 inch dial temperature gauges suction strainer, gauge glass, 2 float switches and control panel

4.	Control panel shall be complete with motor controllers, disconnect switches, fuse blocks with fuses, manual alternator switch, HOA switches, pump RUN indicating lights, terminal strip and momentary "Test" push buttons

5.	Automatic Operation: Float valve shall start and stop pumps. "Lead-lag" manual sequences shall provide for manual selection of lead pump, automatic operation of both pumps under abnormal load conditions and automatic operation of lag pump upon failure of lead pump each condensate return pumps shall be similar to Domestic ITT Type SA

NOTE: EDIT PRESSURE COORDINATE WITH ALL

OOLER

B.	Condensate cooler shall be shell and tube type with flanged end connections, flanged dished head, 3/4 inch OD No. 18 BWG copper tubes, ASME relief valve and ASME stamped for minimum 150 psig working pressure. Supports for cooler shall be welded pipe stand or structural base. Cooler rating shall be based on fouling factor of 0.0005 each side (0.001 total)

C.	Condensate cooler shall be a steel tank with steam vent and temperature actuated regulating valve. Opening point adjustment may be anywhere within 60 deg F and 140 deg F, similar to Penn

OOLER

9)	VACUUM PUMPS

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

A.	Vacuum pumps shall be packaged duplex unit with centrifugal pumps, motors, pump connected to motor with flexible coupling, pressure gauges at each pump discharge, suction strainer, receiver, automatic controllers, motor controller and disconnect switch. Unit shall be factory assembled, piped and wired ready for final connection

B.	Ratings shall be in accordance with ASHRAE Vacuum Heating Pump Code and minimum capacities as noted

C.	Pumps body shall be cast iron with enclosed bronze impeller.

D.	Steel receiving tank shall be complete with vacuum switches, 2 float switches gauge glass, 9 inch industrial type thermometer and water connections for pump priming

E.	Automatic operation: Float and vacuum switches shall start and stop pumps. Automatic alternator shall alternate lead pump. Selector switches for selecting float, vacuum and float or continuous operation. Motor controllers, alternator, vacuum and float switches shall be factory mounted and wired

SIMI

F.	Pumps similar to Domestic Type VLR or VL.

NOTE: CONSIDER SEPARATE AIR AND WATER PUMPS FOR ENERGY CONSERVATION. COORDIATE ADDITIONAL STARTER REQUIREMENTS WITH ELECTRICAL DEPT

G.	Separate air and water pumps, similar to Domestic Type VCD

NOTE: REVIEW WITH DEPARTMENT CHIEF ENGINEER (OR GES) AND CU. USE ONLY ON HIGH PRESSURE SYSTEM

NOTE: THE FOLLOWING ARTICLE OF THE SPEC IS BASED ON MANUFACTURER INDUSTRIAL STEAM MODEL 0.005

SIMI

10)	DEAERATOR

A.	Refer to section Steam Boiler Plant.

11)	MISCELLANEOUS DEVICES

NOTE: COORDINATE WITH BOILER PLANT.

A.	Cast iron muffler type atmospheric exhaust head with drip gutter and drain to remove moisture entrainment from steam discharge shall be similar to Crane

B.	Welded steel bodied steam separators capable of separating more than 97 percent of moisture and oil entrained in steam by both impingement and centrifugal action, similar Anderson Hi-Ef

C.	Factory fabricated separator aftercooler assembly, for automatic temperature regulation with water inlet and sensing bulb coupling. Separators shall be similar to Cleaver Brooks No. 18DF (or No. 20A0 if required`)

NOTE: SELECT APPLICABLE OPTION FROM THE FOLLOWING LISTINGS. USE OPTION 1 FOR ORDINARY STEAM SYSTEMS. USE OPTION 2 FOR CRITICAL LABORATORY APPLICATIONS SUCH AS AUTOCLAVES, ETC. PROJECT MAY REQUIRE BOTH TYPES. IF SO EDIT ACCORDINGLY

NOTE: COORDINATE WITH WATER TREATMENT.

D.	Sample Cooler shall be complete as follows:

COOL

1.	Steel sheet.

a.	Copper tubing and shell and tubing removable without distributing piping. Install as indicated on drawings

2.	Steel outer shell.

a.	Inner coil shall be 316 stainless steel or copper and removable for cleaning. Cooler shall be similar to Dearborn Model CS

COOL

NOTE: FOR SPECIAL APPLICATIONS REQUIRING CLEAN STEAM, SUCH AS LABORATORY AUTOCLAVES, STERILIZERS, ETC

E.	Cast iron body steam filters with filter-element consisting of pure inert amorphous carbon shall be permanent, cleanable and reusable. Filters shall be similar to Adams Type TR-PC

F.	Cast iron or welded steel discharge drip pan elbow with drain tappings, similar to Kunkle Fig 299

NOTE: INCLUDE AS APPLICABLE FOR THIS PROJECT. INVESTIGATE ECONOMIC AND ENERGY BENEFITS OF THE FOLLOWING SYSTEM. REVIEW APPLICATION WITH MANUFACTURER AND GES. DETERMINE IF A STEAM AND WATER SEPARATOR SHOULD BE USED FOR THE DRAIN FROM THE BLOWDOWN SYSTEM

12)	PACKAGED BLOWDOWN SYSTEM

A.	Refer to Section Steam Boiler Plant.

13)	CONVERTORS

NOTE: COORDINATE PRESSURE REQUIREMENTS.

A.	Convertors shall be shell and tube type with flanged end connections, dished head at other end, 3/4 inch OD NO. 18 BWG copper tubes, ASME relief valve and ASME stamped for minimum 150 psig working pressure. Support for convertor shall be welded pipe stand or structural base fouling factor shall be 0.0005

UBES

B.	Tubes working pressure shall be 150 psig.

C.	Tubes working pressure shall be 200 psig.

UBES

D.	Shell working pressure shall be 150 psig.

1.	Supports shall be welded pipe stand or structural base.

14)	VALVES FOR DIRECT RADIATION

A.	Spring retained, packless, cast brass body valves with integral brass union, non-rising stem, heat resisting composition handle, rated at 25 psig wsp shall be similar to Sarco No. RP

15)	FINNED TUBE RADIATION

NOTE: THIS SPECIFICATION IS NOT APPLICABLE FOR SECURITY APPLICATIONS IN CORRECTIONAL AND PSYCHIATRIC FACILITIES. ON SCHEDULE LIST FINS SPACING, FINS SIZE AND SIZE OF TUBE

A.	Finned tube radiator elements:

1.	Finned tube elements shall have minimum capacities as shown on plans and a maximum of 48 fins/ft

2.	Elements shall be IBR tested and ratings approved by IBR.

3.	Tubes shall be expanded with fins embedded into tubes and bond guaranteed for life of element

NOTE: COORDINATE STEAM PRESSURE

FTR

4.	Steel fin tube shall be threaded steel pressure tubing designed for 575 psig with steel plate fins

(1)	inch.

5.	Copper and aluminum fin tube shall be seamless copper tube designed for 150 psig with hard aluminum plate fins .016 inch thick

6.	Radiation similar to Vulcan Linovector Figures 42 and 43

NOTE: USE FOR ENCLOSURES BY GENERAL CONTRACTOR.

FTR

ENCLOS

B.	Enclosures shall be provided by General Contractor. Refer to architectural drawings for details

1.	Provide slide cradle hangers with nylon slide plate maximum 4 ft - 0 in. on centers suitable for attachment to wall or floor as indicated and sheet metal safing and supports for entire length of element to prevent air by-pass

2.	Coordinate access panel locations with enclosure manufacturer to allow for routine maintenance

NOTE: USE FOR ENCLOSURES BY HVAC.

C.	Enclosures minimum 16 ga. reinforced cold rolled steel with interlocking flush joints and no exposed fasteners

1.	Continuous top support: Back panel shall be 20 gauge to position and align brackets, similar to Vulcan Duramount Type "A". Back panel when visible from exterior, similar to Vulcan Duramount Type "D"

2.	1-1/2 x 3/16 inch steel brackets mounted on 3 ft - 0 in. center with nylon coated sliding saddles for each row or elements or bare tubing

3.	Dampers shall be 18 ga. full-length, positive positioning, dampers, tamper proof where required

4.	Accessories for complete wall to wall installation including end closures, corners, trim strips, flush hinged 8 inch x 8 inch access doors at all valves and vents

5.	Modular construction: Fixed flanged mullion sections at each window mullion where future partitions may be installed to permit removal of interlocking intermediate enclosure sections

6.	Enclosure and accessory construction:

a.	Zinc coated steel.

FINISH

b.	Baked enamel finish of color selected by Architect

c.	Primed and ready for field painting.

FINISH

7.	Enclosure styles:

a.	Type A - Architectural with heavy anodized extruded aluminum top, pencil proof outlet vanes factory assembled to front skirt with gussets at top and vertical stiffeners and double break at bottom, similar to Vulcan Duravane Type DV

b.	Type B - standard louvered with pencil proof integral louvers and top and front stiffeners

(1)	Styles:

(a)	Type B1, slope top, similar to Vulcan Type DS

(b)	Type B2, rounded outlet, similar to Vulcan Type DR

(c)	Type B3, front outlet, similar to Vulcan Type DF

(d)	Type B4, top outlet, similar to Vulcan Type DT

c.	Type C - baseboard with pencil proof mini-louvers and narrow silhouette

(1)	Styles:

(a)	Type C1, slope top, similar to Vulcan Type FS

(b)	Type C2, flat top, similar to Vulcan Type FR

d.	Special pedestal, floor mounted, or modified to suit building construction with sizes as noted on schedules with supports and accessories as required. Refer to details on the drawings

ENCLOS

16)	CONVECTORS

A.	Heating elements with headers of cast iron or cast bronze with 3/8 inch copper tubes and aluminum fins

ENCLOS

B.	Convector cabinets will be provided by General Contractor. Coordinate access panel locations with convector cabinet manufacturer to allow for routine maintenance

C.	Convector cabinets. Front top and ends constructed of 16 ga. reinforced steel with factory applied prime coat. Back constructed of 18 ga. steel and 1/2 inch celotex insulation applied at factory. Damper shall be tamper proof where required

1.	Access doors shall be flush hinged at valves and vents.

a.	Full recessed with front outlet.

BOTTOM

(1)	Bottom inlet grille, similar to Trane Model RG

(2)	Bottom arch inlet; similar to Trane Model RK.

BOTTOM

b.	Partially recessed with front outlet.

INLET

(1)	Bottom inlet grille, similar to Trane Model SG

(2)	Bottom open arch inlet, similar to Trane Model SK

INLET

c.	Free standing:

TOP

(1)	Sloping top outlet.

(2)	Front outlet.

TOP

GRILLE

(3)	Bottom inlet grille, similar to Trane Model SFG

(4)	Bottom open arch inlet, similar to Trane Model FK

GRILLE

d.	Wall hung.

FRONT

(1)	Sloping top outlet, similar to Trane Model SW

(2)	Front outlet, similar to Trane Model W.

FRONT

2.	Inlet grille where indicated.

ENCLOS

17)	UNIT HEATERS

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT.

A.	Unit heaters with AMCA rated propeller fan, steam heating coil, totally enclosed fan motor, guard, casing and adjustable louvers

B.	Coil shall be constructed of copper tubes, aluminum fins with minimum capacities, as noted

C.	Motor shall be multispeed, split-capacitor, with speed regulator

TYPE

D.	Horizontal type, similar to Trane Co. Model S.

E.	Vertical type, similar to Trane Co. Model P.

F.	Horizontal and vertical types as noted, similar to Trane Co. Model S and P

TYPE

18)	UNIT HEATERS - CABINET TYPE

NOTE: COORDINATE WITH ELECTRICAL DEPARTMENT

A.	Cabinet heaters with direct driven AMCA rated centrifugal fans, motor, steam heating coil, filter, cabinet, factory wired UL listed and minimum capacities as noted

B.	Coil shall be copper tube and aluminum fins and 1/8 inch key operated air vent at top of each heating coil

C.	Forward curved double inlet fan wheels with lubricated sleeve bearing

FILTER

D.	Washable filter.

E.	Disposable filter.

FILTER

CAB

F.	Cabinet enclosure shall be as follows: No. 16 USSG, insulated with removable sections and doors for access to fan, motor and coil as follows

TYPE

1.	Fully recessed.

2.	Semi recessed.

3.	Free standing.

4.	Ceiling mounted.

TYPE

G.	Duct collars for concealed units.

CAB

NOTE: COORIDINATE WITH ELECTRICAL DEPARTMENT.

H.	Motor: Multispeed, split capacitor with speed regulator

I.	Units similar to Trane Co. Force-Flo.

NOTE: WHEN CONDENSATE METER IS INSTALLED IN GRAVITY OR VACUUM RETURN LINE AHEAD OF CONDENSATE OR VACUUM PUMPS

OND

19)	CONDENSATE METER

A.	Self contained, meter of volumetric construction with copper and/or bronze casing and internal parts

B.	Totalizer register shall be direct reading weight of condensate and units shall be similar to Central Station Steam Co. Cadillac

NOTE: WHEN CONDENSATE METER IS INSTALLED IN PUMPED DISCHARGE LINE OF CONDENSATE, BOILER FEED OR VACUUM PUMPS

20)	CONDENSATE METER

OND

A.	Self contained, volumetric construction with casing and internal parts of disc and ball, carbon. All other parts shall be bronze

B.	Horizontal straight reading totalizer register reading in pounds of condensate

C.	Accuracy shall be plus or minus 2 percent of actual flow rate over entire range and meters shall be capable of measuring temporary overloads up to 150 percent of rated capacity

D.	Provide meters similar to Hersey.

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Piping:

1.	Pitch steam, condensate return and drip piping for gravity drainage

2.	Provide 3 elbow type swing joints on steam and condensate return connections to equipment and piping systems

3.	Dirt pockets: Provide full size of riser, 12 inches long at bottom of each riser and as noted

4.	Provide riser shut off valves in runout to each steam and condensate return riser

5.	Drips: Provide as follows:

a.	Steam piping:

(1)	Maximum 75 foot intervals.

(2)	At bottom of vertical lines.

(3)	At rising points in piping.

b.	Sectionalized valves shall be at each side where condensate may be pocketed

c.	Underground piping shall be in building, at wall.

d.	Provide drip points with dirt pockets, the same size as piping, or 3 inch IPS, with removable caps. Welded piping shall have caps flanged. Screwed piping shall have caps screwed, made up with graphite

e.	Connect drips to condensate return and refer to drip detail

B.	Steam traps: Provide unions on both sides of traps and strainer at inlet. Locate to permit removal of heads for inspection of elements. Provide check valve at trap discharge when traps discharging into condensate return mains at higher elevation

C.	Atmospheric exhaust head: Provide piping from drain connection to 1/4 inch x 24 inch x 24 inch steel plate on roof. Base of riser to exhaust head shall be trapped and dripped

D.	Steam separators shall be trapped and dripped.

E.	Equipment piping and connections: Provide steam, condensate return, drip and vent piping connections as noted and as recommended by equipment manufacturer. Verify location, number and size of connections

1.	Domestic hot water heaters: Install temperature regulators supplied under Plumbing Work

2.	Heating coils: Locate condensate return traps so as not to be subject to freezing

3.	Boiler plant equipment: Refer to Sections BOILER PLANT - GAS FIRED and BOILER PLANT - OIL FIRED

4.	Laboratory, kitchen, laundry and medical equipment: Provide steam, condensate return, drip and vent piping for equipment using steam: as noted and in accordance with requirements of equipment manufacturer

a.	Verify exact location, number and size of equipment connections in accordance with drawings and specifications for General Construction Work

b.	Provide globe valve in each steam connection.

c.	In each return connection, provide globe valve at equipment, trap, strainer, upstream of trap and check valve and gate valve on trap discharge

d.	Exposed, uninsulated steam, return and drip piping, valves, strainers and traps shall be chromium plated

e.	Chromium plated valves shall be with heat resisting composition cone handle

f.	Pressure reducing valves: Provide single stage, self contained PRV in steam connections to equipment, as noted. Provide strainer at inlet. Exposed pressure reducing valves and strainers shall be chromium plated

NOTE: DO NOT USE STEAM SMOTHERING IF CO2 EXTINGUISHING SYSTEM IS PROVIDED FOR HOODS

F.	Kitchen range hood steam smothering: Provide steam piping with quick opening valve. Provide valve with rapid action, spring loaded, self closing, lever operated with globe type bronze body. Provide valves with renewable disc and sliding spindle, similar to Jenkins Fig. 121

G.	Steam and water mixing unit connections: Provide steam piping connected to unit

1.	In steam connection, provide the following:

a.	Globe valve.

b.	Single stage, self contained pressure reducing valve. Maximum outlet pressure: 5 psig

c.	Strainer at inlet to pressure reducing valve.

2.	Exposed piping, valves, pressure reducing valves, and strainers shall be chromium plated

3.	Chromium plated valves shall be with heat resisting composition cone handle

H.	Pressure reducing valve stations: Provide piping as noted with sound diffractor, on discharge

NOTE: REVIEW WITH ACOUSTICAL CONSULTANT.

1.	Provide vibration isolation hangers at station and piping for 50 feet each side of station. Refer to Section "VIBRATION ISOLATION" for hanger type

I.	Vent flash tank to atmosphere.

NOTE: PERMITTED ONLY IF LOW PRESSURE MAIN HAS A RELIEF VALVE.

1.	Vent to low pressure steam main.

J.	Condensate cooler:

NOTE: CONSIDER HEAT RECOVERY WHERE ECONOMICAL.

1.	Connect cooling water to valved outlet provided under Plumbing Work. Discharge to floor drain,or as directed

K.	High temperature condensate pump: Mount on concrete foundations

NOTE: INCLUDE FOR BEARING COOLING WITH CONDENSATE 280 F OR ABOVE. COORDINATE WITH PLUMBING DEPT

1.	Cooling water piping: Connect to valved outlet provided under Plumbing Work. Discharge to floor drain, or as directed

L.	Vacuum pump: Provide vent piping from tank, up to ceiling and down to floor drain with air check

1.	Pump priming: Provide make-up water connection, from valved outlet provided under Plumbing Work

M.	Direct radiation: Provide valves at supply end of each radiation element as noted and in accessible locations. Valves shall be readily accessible. Provide thermostatic traps as noted. Pitch down in direction of steam flow. Provide 1/8 inch key operated air vent at top of each element

N.	Unit heaters: Provide control valves and traps as noted. Thermostat shall control motor

NOTE: OMIT FOR CABINET TYPE UNIT HEATERS.

1.	Unit heater mounting: Mount from overhead construction with steel rods and vibration isolaters. Where overhead construction does not permit fastening of rods, provide additional framing

2)	Testing and adjusting:

A.	Before operating pumps:

1.	Assure that piping is clear of debris which might clog pump

2.	Vent air from pump system to assure water in pump and piping system

3.	Check for sufficient lubrication.

4.	Check for correct operation of check valves.

5.	Check for correct rotation.

6.	Assure that strainer is clean before commencing testing

7.	Check for motor overload by taking ampere readings.

B.	Deaerator: Test oxygen concentration. Concentration shall not exceed 0.005 cc/liter. Test range shall be 0 percent to 100 percent capacity