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READ AND REMOVE THIS PAGE BEFORE PLACING
THE SPECIFICATION SECTION IN THE CONTRACT

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DIVISION 15:  MECHANICAL

SECTION 15510 - HYDRONIC PIPING

USE:	Furnishing and installing piping systems associated with heating and air conditioning. 

NOTES TO SPECIFIER:

	A.	Options within paragraphs are identified by enclosure in brackets; blank spaces enclosed by brackets [_____] provide for information to be inserted, as appropriate, to individual projects.

	B.	TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES, the specifier must edit (delete, substitute or add to the text).  The remaining paragraphs must be renumbered.

	C.	DELETE FOR FINAL COPY: Notes to the Specifier, located between lines of asterisks; all [brackets], underlining, boldface, and italics, within the paragraphs; and this page.  (Open Reveal Codes [alt F3] to do this accurately.)

	D.	To Edit “(Footer B)”: (Corel 8).  ENTIRE FOOTER SHOULD BE BOLDED.  Click in the footer and delete the “Project Name (ftr B)” text and replace it with the Name of the Project (upper and lower case).  Replace date with current MM/YY (WITHOUT BRACKETS).

	E.	The Guide Specifications are intended to be continuously reviewed and revised.  User’s technical comments are appreciated.  Also, other related or similar specification that are written “from scratch” that could benefit others, or other questions can be sent to NSTC A/E Group, ST 110, or call (303) 987-6868.

DRAWING DATA REQUIRED: 

REQUIRED SPEC MODIFICATIONS:

GENERAL NOTES

A.	Whenever entire articles, paragraphs or subparagraphs are not applicable, the articles, paragraphs or subparagraphs should be deleted; when necessary, reletter or renumber articles, paragraphs or subparagraphs.

B.	THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE SECTION.

TECHNICAL NOTES

A.	1.1A:  Select applicable words.

B.	1.1B:  Select or add applicable sections.  Do not list sections from Division 15.

C.	1.2:  Select or add applicable references.

D.	1.3B:  Insert number of copies of the manufacturer's descriptive data required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

E.	2.1I:  Select phrase when reference to drawings is required.

F.	3.9A:  Select applicable words.

G.	4.1 and 4.2:  When a "lump sum" Contract is used, delete the title PART 4:  MEASUREMENT AND PAYMENT, and both articles from this section.  Measurement and payment will be addressed in Part 4 of Section 01010 -Summary of Work.

REVISIONS OF THIS SECTION:
CSI format, editorial changes: 12/01
Metric:  
Technical Update: 02/91

SECTION 15510

HYDRONIC PIPING

PART 1:  GENERAL

1.1  SUMMARY:

	A.	Section Includes:  [Furnishing] [and] [installing] piping systems associated with heating and air conditioning.

1.2  REFERENCES:

	A.	American National Standards Institute:
	ANSI B16.22-89		Wrought Copper and Copper Allow Solder Pressure Fittings
	ANSI B31.1.89  		Power Piping

	B.	American Society of Testing Materials:
	ASTM B88-89		Seamless Copper Water Tube

	C.	Federal Specifications:
	Fed. Spec. WW-H-171E-78	Pipe Hangers and Supports
	Fed. Spec. WW-V-51-83	Valve, Bronze:  Angle, Check, and Globe, 125, 150, and 200 Pound Screwed, Flanged, and Solder
	Fed. Spec. WW-V-54-82	Valve, Gate, Bronze (125, 150, and 200 Pound, Screwed, Flanged, Solder-End)

1.3  SUBMITTALS:

	A.	General:  Submittals shall be according to Section 01300 - Submittals.

	B.	Manufacturer's Literature:  Submit [____] copies of manufacturer's descriptive data  for the hangers, balancing cocks, thermometers, flow meters, strainers, and pressure gauges. to be used on this project.

PART 2:  PRODUCTS

2.1  MATERIALS:

	A.	Piping, Fittings and Valves:  Working pressure and temperature maximums, 125 psi and 200 degrees F; water service, above grade.

	B.	Piping:  Shall be according to ASTM B 88.  Copper tubing, hard drawn, Type K.

	C.	Fittings:  Shall be according to ANSI B 16.22.  Wrought copper solder joint.

	D.	Unions:  2 1/2 inches and smaller, shall be according to ANSI B 16.22.  Wrought copper solder joint, grout seat.

	E.	Flanges:  Three inches and larger, cast bronze, 125 pound, ASME Standard.
	1.	Bolts and Nuts:  Square head machine bolts wit heavy hex nuts. galvanized.
	2.	Gaskets:  1/16-inch, full faced, for water surface.

	F.	Dielectric Connections:
	1.	Unions:  2 1/2 inches and smaller, 174 psi minimum W.P., ends to match connections.
	2.	Flanges:  3 inches and larger, cast bronze, 125 pound, ASME Standard, with bolt insulators, dielectric gasket, bolts and nuts.

	G.	Gate Valves:  3 inches and smaller, bronze body, solder ends, 150 psi SWP saturated, 300 psi W.O.G., integral seat, double disk, risking stem, union bonnet.  Shall be according to Fed. Spec. WW-V-54, Class B, Type III.

	H.	Check Valves:  3 inches and smaller, bronze body, solder ends, horizontal swing, regrinding type, Y pattern, renewable bronze disk.  150 psi saturated, 300 psi W.O.G.  Shall be according to Fed. Spec. WW-V-51, Class B, Type IV.

	I.	Balancing Cocks:  Calibrated bronze balance valves with connections for a portable differential pressure meter.  Meter connections provided with built-in check valves; an integral pointer to indicate valve setting; constructed with adequate seals and rated at 125 psi at 250 degrees F.  [Refer to drawings for additional requirements.]

	J.	Pressure Gauges:  Located as shown.  4-1/2-inch dial, water service, bronze bourdon tube movement, cast aluminum case, white face, black numbers, with gauge cock.  Range at two times working pressure.

	K.	Thermometers:
	1.	Adjust-angle thermometer required.
	2.	Ranges as follows:
	Heating Water     	30 degrees to 200 degrees F.
	Cooling Water		 0 degrees to 100 degrees F.
	3.	For thermometers and wells through insulation, provide extensions to compensate for insulation thickness.

	L.	Test Taps:  Combination pressure and temperature test taps consisting of a 1/4-inch NPT fitting designed to receive either a temperature or pressure probe, at inlet and outlet water connections of all heat transfer equipment and at other locations as shown.

	M.	Strainers:  Wye type, bronze construction, 150 psi service, complete with removable stainless steel basket with minimum perforations of 1/8-inch diameter.

	N.	Safety and Relief Valves:
	1.	Type and size as applicable, constructed, rated, and stamped according to ASME.
	2.	Pressure relief valve for unheated liquids.
	3.	Safety relief valves for heated liquids, including water boilers.

	O.	Automatic Air Valves:  Use industry standard equipment of brass construction.  Each automatic air valve shall be located in the piping downstream of a shutoff valve.  Valves shall be located at all high points in the systems and as shown on the drawings.  Each heat pump unit will require an automatic air valve.

	P.	Escutcheons:
	1.	Heavy solid patten steel, cast iron, or malleable iron with set screws.  Provide prime coat of paint on all piping exposed to view indoors where passing through floors, roofs, partitions, walls, or ceilings. Escutcheons installed over sleeves which project above finished floors shall be deep cup type.
	2.	For chrome-plated pipe, solid pattern, smooth chrome-plated cast brass.

	Q.	Drain Pans:  Minimum 18 gauge stainless steel, suitably reinforced.

	R.	Superstrut or Unistrut Hangers and Supports:  Shall have a minimum safety factor of 5, based upon ultimate tensile or compressive strength, as applicable of material used.  Turnbuckles shall have capacity of not less than attached rod.  Provide bracing to prevent lateral motion.

	S.	Pipe Hangars and Supports:  Shall be according to ANSI B 31.1.0.

	T.	Weight Support:  Do not support weight of piping from mechanical equipment, pump flanges,coil connects, and related items.

	U.	Horizontal Piping:  Horizontal channel with cast iron rollers.  Rollers are not required where spring hangers are used.

	V.	Caulking Compound:  Oakum or fibrous glass blanket.  For finishing, two part polysulfide, resilient type.

PART 3:  EXECUTION

3.1  INSTALLATION:

	A.	Piping Along Walls:  Arrange piping along walls in horizontal groups, each group to be in one plane,  Maintain indicated slope.

	B.	Expansion, Contraction, and Bending:  Install piping with provisions for expansion and contraction using expansion loops, swing or expansion joints where required.  Provide for expansion and contraction in mains, risers, and runouts.  Do not spring or force piping during installation.  Do not bend piping without use of bending machine.

	C.	Sloping, Air Venting, and Draining:
	1.	Slope piping as indicated above, true to line and grade, and free of traps and air pockets.
	2.	Provide eccentric reducers for changes in horizontal heating and chilled water piping, top side flat.
	3.	Connect heating and cooling water branch piping to top of mains.
	4.	Provide drain valves and hose adapters at all low points in piping.

	D.	Fittings:  Standard manufactured.  Field fabricated fittings and bushings are prohibited on all piping.

	E.	Unions:  Provide piping with unions to permit alterations and repairs.

	F.	Pipe Ends:  Cut pipe and prepare ends with full inside diameter.  Deburr and size.

	G.	Threaded Joints:  Apply Teflon tape to male equipment threads.

	H.	Soldered Joints:  Use silver solder for copper tubing.  Clean surfaces to be jointed of oil, grease, rust, and oxides.  Clean socket of fitting and end of pipe with emery cloth.  After recleaning and before assembly or heating, apply flux to joints surface and spread evenly.

	I.	Openings:  Keep openings in piping closed during construction to prevent entrance of foreign matter.

	J.	Valves:
	1.	Field check valves for packing and lubricant.  Determine disk is for service intended.  Replace leaking packing.  Service valves with lubricant for smooth and proper operation before placing in service.
	2.	Install valves accessible from floor level.  Do not install valves with stem pointing downward unless indicated.  Furnish operating handles for valves and cocks without integral operators.
	3.	Install valves same size as line size.
	4.	Install swing checks and gravity closing lift checks in horizontal position.
	5.	Install gate blowdown valves and hose adapters at strainers; same size as strainer blowoff connections.

	K.	Instrumentation:  Locate thermometers and gauges to permit observation by personnel standing on floor.  Provide instrument cocks at pressure gauges.

	L.	Pipe Sizes:  As shown on the drawings.

3.2  EQUIPMENT PIPING:

	A.	Shutoff Valves:  Provide shutoff valves at coils, and at other equipment and piping where indicated or required.

	B.	Fill Valve:  In the cold water make-up to the boiler, provide an automatic fill valve.  Provide three valve bypass with globe valve around automatic fill valve.  Upstream of fill valve and its bypass, provide specified backflow preventer.

3.3  GAUGES:

	A.  Requirements:  Locate as approved by the Contracting Officer.

3.4  THERMOMETERS:

	A.	Separable Sockets:  Provide with brass separable sockets of proper length to insure accurate reading and extension necks to suit insulation thickness.

	B.	Thermometer Wells:  Provide brass separable socket thermometer wells for intermittent use, of proper length to insure accurate reading extension necks to suit insulation thickness, and screwed removable plug.

	C.	Location:  Locate thermometers as approved by the Contracting Officer.

3.5  EXPANSION LOOPS, GUIDES, AND ANCHORS:

	A.	Expansion:  Calculate expansion from 0 degrees F to maximum operation temperature of system.

	B.	Guides:  Provide guides to properly direct pipe movement into expansion loops and offsets.

	C.	Anchors:  Provide anchors of an approved design to control movement in piping.  Weld anchors to ferrous piping and braze anchors to nonferrous piping.

3.6  SLEEVES:

	A.	Waterproof Construction:  For piping passing through sleeves in areas containing floor drains and in waterproof construction, caulk annual space between pipe or pipe insulation and the enclosing sleeve to attain a watertight installation.  Caulk and finish with sealing compound.

	B.	Other Areas:  For piping passing through all mechanical room walls, floors, and ceiling, caulk annual space between pipe or pipe insulation and the enclosing sleeve, to prevent sound transmission.  Caulk and finish filling each end with sealing compound.

3.7  PIPE HANGERS AND SUPPORTS:

	A.	Within the Building:  Piping within the confines of the building walls, rigidly support from the building structure by means of hangers or supports.  Support hanger rods by coach screw rods, angle iron clips, or beam clamps.  No drilling of structural members will be permitted without approval.  Trapeze type hangers may be used for multiple parallel horizontal pipe.  Do not bend pipe hanger rods to provide alignment of piping offset from overhead support.

	B.	Location:  Install at locations not more than 3 feet from end of each runout and not over 1 foot from each change in direction.  Use adjustable type hangers.

	C.	Insulated Piping:  For insulated piping between piping and hangers, provide inserts of load bearing calcium silicate pipe insulation, or heavy density load bearing fibrous glass pipe insulation.

	D.	Piping 2 Inches and Smaller:  Support piping 2 inches and smaller with adjustable pear-shaped band iron hangers having threaded rod and two locknuts.

	E.	Piping 2 1/2 to 5 Inches:  Support piping, 2 1/2 inches to 5 inches inclusive, with adjustable clevis type hangers, threaded rod, and two locknuts.

	F.	Exposed Vertical Piping:  Support exposed vertical piping smaller than 1 1/2 inches with split ring type hangers, located midway between floor and ceiling.

	G.	Other Piping:  Support piping running along walls near the floor with approved brackets or pedestals.

	H.	Support for Copper Tubing:  Provide support at the following maximum intervals:
3/8 to 3/4 inches . . . . . . . . . . . . . . . 5 ft.
1 to 1 1/4 inches . . . . . . . . . . . . . . . 6 ft.
1 1/2 to 2 1/2 inches . . . . . . . . . . . . . 8 ft.
3 inches  . . . . . . . . . . . . . . . . . . .10 ft.
4 inches and larger . . . . . . . . . . . . . .12 ft.

	I.	Support for Specialties:  Provide additional support for heavy valves, specialties, and sway bracing  where required.

	J.	Trapeze Hangers:  With the approval of the Contracting Officer, trapeze hangers may be used to support a groups of pipes.

	K.	Painting:  Remove rust from ferrous hanger equipment and rods, and apply one coat of rust inhibitive paint before or immediately after erection.

3.8  PIPE IDENTIFICATION:

	A.	Piping:
	1.	Identify piping with symbol identification and directional flow arrows.  Symbol identification, black stenciled letters, complying with legend on drawings and not less than 1 inch high on white background.  Directional arrows, black stenciled, not less than 4 inches long on same white background as symbols.

	2.	Identify all piping at 25-foot centers, but not less than one in each room whether or not concealed.

	B.	Valves:
	1.	Identify main control valves in mechanical equipment areas with 1 1/4-inch by 3-inch identification tags.  Install on handwheels or stem with brass beaded chain.  Identification tags, engraved, indicating the service abbreviation, stating whether normally open (engraved on green), or normally closed (engraved on red).

	2.	Provide approved identification charts, framed with glass or plastic front.  Pipe identification chart shall list piping systems with symbol and color coding where applicable.  Valve identification chart shall list valve model numbers and symbol for service corresponding to piping symbol.

	C.	Equipment:
	1.	Provide manufacturer's nameplates on all equipment, identifying manufacturer's name, model number, size, capacity, and electrical characteristics.

	2.	Manufacturer's nameplates, install visible.  Leave clean and legible.

	3.	Identify all equipment with symbol number and service as shown using 1 1/4-inch by 3-inch Lamicoid nameplates, securely fastened to equipment.

3.9  FIELD QUALITY CONTROL:

	A.	Leak Test:  The Contractor shall perform a hydrostatic test of 150 psig for a period of 4 hours after installation of chilled and hot water systems, and piping is in place, prior to [backfilling,] [insulating,] [or concealing.]  The Contractor shall furnish necessary equipment, labor, and materials to conduct the testing.  Testing shall be conducted in the presence of the Contracting Officer who shall be given 48 hours notice before any test is to be conducted.

	B.	Equipment Removal:  The Contractor shall remove from systems, during testing, all equipment which would be damaged by testing and replace removed equipment after testing.  Systems may be tested in sections as work progresses; however, any previously tested portion shall become a part of any later test of composite system.  The Contractor shall correct leaks by remaking joints with new material.  Test time will be accrued only while full test pressure is on system.

	C.	TAB Phase:  The complete testing of the system shall be done during the testing, adjusting, and balancing (TAB) phase of the Contract.

	D.	Valves:  The Contractor shall test valve bonnets for tightness.  The Contractor shall test operate valves from Closed-to-Open-to-Closed position while valve is under test pressure.

	E.	Hangers and Supports:  After the hydrostatic test, the Contractor shall check hangers, supports, and rods to insure they are plumb, and supporting proper share of load.  The Contractor shall add additional support when required by the Contracting Officer.

3.10  CLEANING:

	A.	Flushing:  The Contractor shall flush interior of water piping.  Upon completion, the Contractor shall completely drain systems at all low points.  Remove, clean, and replace all strainer brackets and refill systems.

	B.	Circulation:  After above specified flushing and draining, the Contractor shall circulate for a period of 6 hours, a solution (heated to 160 degrees F) of 1 pound of trisodium phosphate for each 50 gallons of water in system.  Upon completion, the Contractor shall completely drain the system at low points remove, clean, and replace strainer baskets and refill systems.

	C.	Refill System:  After cleaning, the Contractor shall drain and refill systems with 40% solution of ethylene glycol-water.  The Contractor shall introduce a suitable corrosion inhibitor to protect system and maintain the pH of the water between 7.5 and 8.5.

PART 4:  MEASUREMENT AND PAYMENT

4.1  METHOD OF MEASUREMENT:

	A.	Units:  The work described in this section will not be measured for payment.

4.2  BASIS OF PAYMENT:

	A.	Payment:  No direct payment for the work described under this section will be made.  The Contractor shall include consideration for this item in the bid price for other items of the Contract.

END OF SECTION

HYDRONIC PIPING
12/01
Project Name (ftr B)