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Microsoft word - 15510_sfsc_add3.docA. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division 1 Specification sections, apply to this section. B. The following Division 15 Sections apply to this Section: 1. "Basic Mechanical Requirements." 2. "Basic Mechanical Materials and Methods." 3. "Valves." 4. "Supports and Anchors." A. This Section includes piping systems for hot water heating, chilled water cooling, dual temperature water, glycol solutions, condenser water, make-up water for these systems, blow-down drain lines, and condensate drain piping. Piping materials and equipment specified in this Section include: 1. Pipes, fittings, and specialties; 2. Special duty valves; 3. Hydronic specialties. B. Related Sections: The following sections contain requirements that relate to this Section: 1. Division 2 Section "Earthwork" for trenching and backfilling materials and methods for 2. Division 15 Section "Basic Mechanical Materials and Methods" for sealing pipe penetrations through basement walls and fire and smoke barriers. 3. Division 15 Section "Valves" for gate, globe, ball, butterfly and check valves. 4. Division 15 Section "Meters and Gauges" for thermometers, flow meters, and pressure 5. Division 15 Section "Mechanical Identification" for labeling and identification of 6. Division 15 Section "Mechanical Insulation" for pipe insulation. 7. Division 15 Section "HVAC Pumps" for pumps, motors and accessories for hydronic 8. Division 15 Section "Direct Digital Control System" for temperature control valves and 9. Division 15 Section "Testing, Adjusting and Balancing" for procedures for hydronic A. Pipe sizes used in this Specification are Nominal Pipe Size (NPS). A. Product Data, including rated capacities of selected models, weights (shipping, installed, and operating), furnished specialties and accessories, and installation instructions for each hydronic specialty and special duty valve specified. 1. Furnish flow and pressure drop curves for diverting fittings and calibrated plug valves, B. Maintenance Data for hydronic specialties and special duty valves, for inclusion in operating and maintenance manual specified in Division 1 and Division 15 Section "Basic C. Welders' certificates certifying that welders comply meet the quality requirements D. Certification of compliance with ASTM and ANSI manufacturing requirements for pipe, E. Reports specified in Part 3 of this Section. A. Regulatory Requirements: Comply with the provisions of the following: 1. ASME B 31.9 “Building Services Piping" for materials, products, and installation. Safety valves and pressure vessels shall bear the appropriate ASME label. 2. Fabricate and stamp air separators and compression tanks to comply with ASME Boiler and Pressure Vessel Code, Section VIII, Division 1. 3. ASME "Boiler and Pressure Vessel Code", Section IX, "Welding and Brazing Qualification" for qualifications for welding processes and operators. a. IMC International Mechanical Code 2003. A. Coordinate the size and location of concrete equipment pads. Cast anchor bolt inserts into pad. Concrete, reinforcement, and formwork requirements are specified in Division 3. B. Coordinate the installation of pipe sleeves for foundation wall penetrations. A. Manufacturer: Subject to compliance with requirements, provide hydronic piping system 1. Grooved Mechanical Joint Pipe, Fittings, and Couplings: b. ITT Grinnell Corp. c. Stockham Valves & Fittings, Inc. a. Bell & Gossett ITT; Fluid Handling Div. b. Taco, Inc. a. Amtrol, Inc. b. Armstrong Pumps, Inc. c. Bell & Gossett ITT; Fluid Handling Div. d. Taco, Inc. a. Amtrol, Inc. b. Bell & Gossett ITT; Fluid Handling Div. b. Bell & Gossett ITT; Fluid Handling Div. c. Hoffman Specialty ITT; Fluid Handling Div. a. Amtrol, Inc. b. Armstrong Pumps, Inc. c. Bell & Gossett ITT; Fluid Handling Div. d. Taco, Inc. b. Armstrong Pumps, Inc. c. Bell & Gossett ITT; Fluid Handling Div. a. Amtrol, Inc. b. Armstrong Pumps, Inc. c. Bell & Gossett ITT; Fluid Handling Div. d. Taco, Inc. e. Victaulic Company of America b. Vulcan Laboratories, Subsidiary of Clow Corp. c. York-Shipley, Inc. b. Armstrong Pumps, Inc. c. Bell & Gossett ITT; Fluid Handling Div. a. Perfection Corp. b. Watts Regulator Co. b. Hoffman Specialty ITT; Fluid Handling Div. c. Metraflex Co. f. Victaulic Co. of America. g. Watts Regulator Co. a. Flexonics Division VOP Inc. b. Keflex, Inc. c. Mason Industries Inc. d. Metraflex Co. A. General: Refer to Part 3 Article "PIPE APPLICATIONS" for identification of where the below B. Drawn Temper Copper Tubing: ASTM B 88, Type L. C. Annealed Temper Copper Tubing: ASTM B 88, Type K. D. Steel Pipe: ASTM A 120, Schedule 40, seamless, black steel pipe, plain ends. E. Steel Pipe: ASTM A 53, Schedule 40, seamless, black steel pipe, plain ends. A. Cast-Iron Threaded Fittings: ANSI B16.4, Class 125, standard pattern, for threaded joints. B. Malleable-Iron Threaded Fittings: ANSI B16.3, Class 150, standard pattern, for threaded joints. Threads shall conform to ANSI B1.20.1. C. Steel Fittings: ASTM A 234, seamless or welded, for welded joints. D. Grooved Mechanical Fittings: ASTM A 536, Grade 65-45-12. Ductile Iron; ASTM A 47 Grade 32510 Malleable Iron; ASTM A 53, Type F, or Types E or S, Grade B fabricated steel; or ASTM A 106, Grade B steel fittings with grooves or shoulders designed to accept grooved E. Grooved Mechanical Couplings: Consist of ductile or malleable iron housing, a synthetic rubber gasket of a central cavity pressure-responsive design; with nuts, bolts, locking pin, locking toggle, or lugs to secure grooved pipe and fittings. F. Wrought-Copper Fittings: ANSI B16.22, streamlined pattern. G. Cast-Iron Threaded Flanges: ANSI B16.1, Class 125; raised ground face, bolt holes spot H. Cast Bronze Flanges: ANSI B16.24, Class 150; raised ground face, bolt holes spot faced. I. Steel Flanges and Flanges Fittings: ANSI B16.5, including bolts, nuts, and gaskets of the following material group, end connection and facing: 1. Material Group: 1.1. 2. End Connections: Butt Welding. 3. Facings: Raised face. J. Unions: ANSI B16.39 malleable-iron, Class 150, hexagonal stock, with ball-and-socket joints, metal-to-metal bronze seating surfaces; female threaded ends. Threads shall K. Dielectric Unions: Threaded or soldered end connections for the pipe materials in which installed; constructed to isolate dissimilar metals, prevent galvanic action, and prevent L. Flexible Connectors Braided Type: Stainless steel bellows with woven flexible bronze wire reinforcing protective jacket; minimum 150 psig working pressure, maximum 250 degree F operating temperature. Connectors shall have flanges or threaded end connections to match equipment connected; and shall be capable of 3/4 inch misalignment. M. Flexible Connectors Spherical Type: Neoprene or butyl; reinforced; minimum 150 psig working pressure, maximum 250 degree F operating temperature. Connectors shall have flanges connections to match equipment connected. A. Solder Filler Metals: ASTM B 32, 50-50, Tin-Lead, for condenser water, chilled water and B. Solder Filler Metals: ASTM B 32, 95-5, Tin-Antimony, for heating hot water, dual temperature water and glycol solution piping. C. Brazing Filler Metals: AWS A5.8, Classification Bag 1 (Silver). 1. WARNING: Some filler metals contain compounds which produce highly toxic fumes when heated. Avoid breathing fumes. Provide adequate ventilation. D. Welding Materials: Comply, with Section II, Part C. ASME Boiler and Pressure Vessel Code for welding materials appropriate for the wall thickness and chemical analysis of the pipe E. Gasket Material: Thickness, material, and type suitable for fluid to be handled, and design A. General duty valves (i.e., globe, check, and ball valves) are specified in Division 15 Section "Valves." Special duty valves are specified below by their generic name; refer to Part 3 Article "VALVE APPLICATION" for specific uses and applications for each valve specified. A. Calibrated Plug Valves: 125 psig water working pressure, 250 degree F maximum operating temperature, bronze body, plug valve with calibrated orifice. Provide with connections for portable differential pressure meter with integral check valves and seals. Valve shall have integral pointer and calibrated scale to register degree of valve opening. Valves 2 inch and smaller shall have threaded connections and 2-1/2 inch valves shall have flanges B. Pump Discharge Valves: 175 psig working pressure, 300 deg F maximum operating temperature, cast-iron body, bronze disc and seat, stainless steel stem and spring, and "Teflon" packing. Valves shall have flanges connections and straight or angle pattern as indicated. Features shall include non-slam check valve with spring-loaded weighted disc, and calibrated adjustment feature to permit regulation of pump discharge flow and C. Safety Relief Valves: 125 psig working pressure and 250 deg F maximum operating temperature; designed, manufactured, tested, and labeled in accordance with the requirements of Section IV of the ASME Boiler and Pressure Vessel Code. Valve body shall be cast-iron, with all wetted internal working parts made of brass and rubber. Select valve to suit actual system pressure and Btu capacity. D. Combined Pressure/Temperature Relief Valves: Diaphragm operated, cast-iron or brass body valve, with low inlet pressure check valve, inlet strainer removable without system shut-down, and noncorrosive valve seat and stem. Select valve size, capacity, and operating pressure to suit system. Valve shall be factory-set at operating pressure and have the capability for field adjustment. Safety relief valve designed, manufactured, tested, and labeled in accordance with the requirements of Section IV of the ASME Boiler and Pressure Vessel Code. Valve body shall be cast-iron, with all wetted internal working parts made of brass and rubber; 125 psig working pressure and 250 deg F maximum operating temperature. Select valve to suit actual system pressure and Btu capacity. Provide with fast fill feature for filling hydronic system. E. Pressure Reducing Valves: Diaphragm operated, cast-iron or brass body valve, with low inlet pressure check valve, inlet strainer removable without system shut-down, and noncorrosive valve seat and stem. Select valve size, capacity, and operating pressure to suit system. Valve shall be factory-set at operating pressure and have the capability for field adjustment. 1. Automatic Flow Control Valves (Automatic Self Compensating Balancing Valves): Class 150, cast iron housing, stainless steel operating parts; threaded connections for 2 inch and smaller, flanges connections for 2-1/2 inch and larger. Factory set to automatically control flow rates within plus or minus 5 percent design, while compensating for system operating pressure differential. Provide quick disconnect valves for flow measuring equipment. Provide a metal identification tag with chain for each valve, factory marked with the zone identification, valve model number, and rate flow in GPM. a. Provide precisely calibrated balance valves to preset, balance and meter flow. Balance valve to be cast iron or bronze body with bronze disc. b. Valve to have differential pressure meter fittings with built-in check valves. c. Valve shall have integral pointer to register degree of valve opening. d. Valve shall be constructed for 125 psi working pressure at a maximum of 250 degrees fahrenheit, and be supplied with preformed insulation cover. e. Valve shall have internal seals to prevent leakage around rotating element. f. Manufacturer: Subject to compliance with requirements, provide balancing valves for Bell and Gossett "circuit Setter" model or approve equal. A. Manual Air Vent: Bronze body and nonferrous internal parts; 150 psig working pressure, 225 deg F operating temperature; manually operated with screwdriver or thumbscrew; and having 1/8 inch discharge connection and 1/2 inch inlet connection. B. Automatic Air Vent: Designed to vent automatically with float principle; bronze body and nonferrous internal parts; 150 psig working pressure, 240 degree F operating temperature; and having 1/4 inch discharge connection and 1/2 inch inlet connection. C. Pump Suction Diffusers: Cast-iron body, with threaded connections for 2 inch and smaller, flanges connections for 2-1/2 inch and larger; 175 psig working pressure, 300 degree F maximum operating temperature; and complete with the following features: 1. Inlet vanes with length 2-1/2 times pump suction diameter or greater. 2. Cylinder strainer with 3/16 inch diameter openings with total free area equal to or greater than 5 times cross-sectional area of pump suction, designed to withstand pressure differential equal to pump shutoff head. 3. Disposable fine mesh strainer to fit over cylinder strainer. 4. Permanent magnet, located in flow stream, removable for cleaning. 5. Adjustable foot support, designed to carry weight of suction piping. 6. Blowdown tapping in bottom; gauge tapping in side. D. Chemical Feeder: Bypass type chemical feeders of 5 gallon capacity, welded steel construction; 125 psig working pressure; complete with fill funnel and inlet, outlet, and drain valves. 1. Chemicals shall be specially formulated to prevent accumulation of scale and corrosion in piping system and connected equipment, developed based on a water analysis of 2. Diverting Fittings: Cast iron body with threaded ends, or wrought copper with solder ends; 125 psig working pressure, 250 degree F maximum operating temperature. Indicate flow direction on fitting. 3. Y-Pattern Strainers: 125 psig working pressure cast-iron body (ASTM A 126, Class B), flanges ends for 2-1/2 inch and larger, threaded connections for 2 inch and smaller, bolted cover, perforated Type 304 stainless steel basket, and bottom drain connection. 4. Basket Strainers: 125 psig working pressure; high tensile cast-iron body (ASTM A 126, Class B), flanges end connections, bolted cover, perforated Type 304 stainless steel E. Air separator: Welded black steel; ASME constructed and labeled for minimum 125 psig water working pressure and 375 F operating temperature; perforated stainless steel air collector tube designed to direct released air into compression tank; tangential inlet and outlet connections; screwed connections up to and including 2 inch NPS; flanges connections for 1-1/2 inch NPS and above; threaded blowdown connection; sized as indicated for full system flow capacity. F. Expansion Tank: Floor mounted, bladder/diaphragm expansion tank constructed of steel per ASME Section VIII, Div 1, for a working pressure of 125 psig. A. Primary Purpose – For Side Stream Installations -- Control of solids in the recirculated cooling water system shall be accomplished via a side-stream flow of not less than 10-20% of the full-stream system flow through a completely assembled separation/filtration package. The package's pump shall provide sufficient pressure for the re-introduction of side-stream fluid back into system flow. B. System Performance Requirements: Testing Requirements – Each unit must be tested by the manufacturer prior to shipment to ensure it conforms to stated operating specifications. 1. Independent Testing Laboratory – Performance of said products must be verified by published results from an independent and identified testing laboratory. Standard test protocol of upstream injection, downstream capture, and separator purge recovery is allowed with 50-200 mesh particles to enable effective, repeatable results. Single pass test performance must not be less than 95% removal. Model tested must be of same 2. Capacity: Flow activity rate shall be 145 U.S. gpm. Inlet/outlet connections shall be 3 / 2-1/2 inch. Pump horsepower shall be 3. Pressure loss shall be between 3-12 psi (.2 to .8 bar) remaining constant, varying only when the flow rate changes. 3. Solids Removal Effectiveness: In a single pass through the separator, given solids with a specific gravity of 2.6 and water at 1.0, performance is expected to be 98% of 74 microns and larger. Additionally, particles finer in size, heavier by specific gravity and some lighter by specific gravity will also be removed, resulting in an appreciable aggregate removal of particles (up to 75%) as fine as 5 microns. In Recirculating Systems -- 98% performance is predictable to as fine as 40 microns (given solids with a specific gravity of 2.6), with correspondingly higher aggregate performance percentages (up to 90%) of solids as fine as 5 microns. 4. Maximum working pressure: 150 psi. Maximum operating temperature: 100º F (38º C). 1. The separator package -- Shall provide for initial pre-straining prior to pump suction (except for side-stream applications), followed by direct pumping through a specific centrifugal-action solids-from-liquid separator. Separated solids shall be continuously bled from the separator's collection chamber into the package's integral solids recovery vessel and solids collection bag. Excess liquid shall pass through the bag and return to system flow via piping connected to the package's pump suction line. Alternatively, the separated solids may be purged periodically to desired disposal with an automatic 2. Strainer -- Cast-iron housing; manual-cleaning; 9/32-inch (7 mm) minimum mesh 3. Pump -- End-suction, single stage; TEFC motor; cast iron housing; iron impeller; bronze shaft sleeve; silicon carbide mechanical shaft seal; flooded suction required. 4. Separator -- Centrifugal-action design, incorporating a true tangential inlet and mutually tangential Swirlex internal accelerating slots, employed to promote the proper velocity necessary for the removal of the separable solids. The internal accelerating slots shall be spiral-cut for optimum flow transfer, laminar action and particle influence into the separation barrel. The separator's internal vortex shall allow this process to occur without wear to the accelerating slots. Separated particle matter shall spiral downward along the perimeter of the inner separation barrel, in a manner which does not promote wear of the separation barrel, and into the solids collection chamber, located below the vortex deflector plate. The separator shall be of unishell construction with SA-36, SA-53B or equivalent quality carbon steel, minimum thickness 5. Vortube -- To ensure maximum particle removal characteristics at flow rates of 400 U.S. gpm (90 m3/hr) or greater, the separator shall incorporate a vortex-induced pressure relief line (Vortube), drawing specific pressure and fluid from the separator's extended solids collection chamber via the outlet flow's vortex/venturi effect, thereby efficiently encouraging solids into the collection chamber. System fluid shall exit the separator by following the center vortex in the separation barrel and spiral upward to the separator outlet. 6. Solids Collection Vessel -- Housing shall be 304 stainless steel with stainless steel basket and coated carbon steel lid with air pressure relief valve; 25- micron fiber felt solids collection bag. Flow control orifice included. Solids capacity: 360 cubic inches (6 liters). 7. Indicator Package – Shall identify when the internal bag requires cleaning/replacement by sensing pressure differential through the solids recovery vessel. 8. Indicator gauge shall be supplemented with a dry electric contact and shall operate a light and audible signal when bag servicing is required. 9. Automatic Purge Valve -- In place of the solids recovery vessel, an electrically- actuated valve shall be programmed at appropriate intervals and duration in order to efficiently and regularly purge solids from the separator's collection chamber. Valve body shall be bronze. Valve ball shall be stainless steel with Teflon seat. 10. Inlet and Outlet – Shall be grooved couplings. 11. Purge Outlet – Shall be threaded with a screw-on flange. 12. Piping -- Schedule 40 galvanized carbon steel; stainless steel braided reinforced rubber 13. Electrical Control -- IEC starter with overload module; HOA selector switch; NEMA-4x enclosure; re-set/disconnect/trip switch; 120 volt, single phase control voltage; CSA- approved. Power requirement: 460 volt, 3 phase, 60 Hz. 14. Valves -- Ball valves on purge line, inlet, and outlet for isolation of solids- 15. Skid Plate -- Stainless steel, 3/16-inch (5 mm) minimum thickness, structural steel 16. Paint Coating – Shall be oil-based enamel 1. Evacuation of separated solids shall be accomplished automatically, employing a motorized ball valve with integrally-equipped programming for controlling the frequency and duration of solids purging. 2. Manufacturers: The separator system shall be manufactured by LAKOS Filtration systems, a division of the Claude Laval Corporation in Fresno, California, USA. Specific model designation is TBI-0145-CMBV or approved equal. A. Install Type L, drawn copper tubing with wrought copper fittings and solder joints for 2 inch and smaller, above ground, within building. Install Type K, annealed temper copper tubing for 2 inch and smaller without joints, below ground or within slabs. B. Install steel pipe with threaded joints and fittings for 2 inch and smaller, and with welded A. Locations and Arrangements: Drawings (plans, schematics, and diagrams) indicate the general location and arrangement of piping systems. Locations and arrangements of piping take into consideration pipe sizing and friction loss, expansion, pump sizing, and other design considerations. So far as practical, install piping as indicated. B. Use fittings for all changes in direction and all branch connections. C. Install exposed piping at right angles or parallel to building walls. Diagonal runs are not D. Conceal all pipe installations in walls, pipe chases, utility spaces, above ceilings, below grade or floors, unless indicated to be exposed to view. E. Install piping tight to slabs, beams, joists, columns, walls, and other permanent elements of the building. Provide space to permit insulation applications, with 1 inch clearance outside the insulation. Allow sufficient space above removable ceiling panels to allow for F. Locate groups of pipes parallel to each other, spaced to permit applying insulation and G. Install drains at low points in mains, risers, and branch lines consisting of a tee fitting, 3/4 inch ball valve, and short 3/4 inch threaded nipple and cap. H. Fire Barrier Penetrations: Where pipes pass through fire rated walls, partitions, ceilings, and floors, maintain the fire rated integrity. Refer to Division 7 for special sealers and I. Install piping at a uniform grade of 1 inch in 40 feet upward in the direction of flow. J. Make reductions in pipe sizes using eccentric reducer fitting installed with the level side K. Install branch connections to mains using Tee fittings in main with take-off out the bottom of the main, except for up-feed risers which shall have take-off out the top of the main L. Install unions in pipes 2 inch and smaller, adjacent to each valve, at final connections each piece of equipment, and elsewhere as indicated. Unions are not required on flanges devices. M. Install dielectric unions to join dissimilar metals. N. Install flanges on valves, apparatus, and equipment having 2-1/2 inch and larger O. Install flexible connectors at inlet and discharge connections to pumps (except inline pumps) and other vibration producing equipment. P. Install strainers on the supply side of each control valve, pressure reducing valve, pressure regulating valve, solenoid valve, inline pump, and elsewhere as indicated. Install nipple and ball valve in blow down connection of strainers 2 inch and larger. Q. Anchor piping to ensure proper direction of expansion and contraction. Expansion loops and joints are indicated on the Drawings and specified in Division 15 Section "Supports and Anchors." A. General: Hanger, supports, and anchors devices are specified in Division 15 Section "SUPPORTS AND ANCHORS." Conform to the table below for maximum spacing of supports: B. Install the following pipe attachments: 1. Adjustable steel clevis hangers for individual horizontal runs. 2. Adjustable roller hangers for individual horizontal runs where shown on the drawings. 3. For multiple horizontal runs, supported on a trapeze hangers. C. Install hangers with the following minimum rod sizes and maximum spacing: A. Soldered Joints: Comply with the procedures contained in the AWS "Soldering Manual." B. Brazed Joints: Comply with the procedures contained in the AWS "Brazing Manual." 1. CAUTION: Remove stems, seats, and packing of valves and accessible internal parts at 2. Purge the pipe and fittings during brazing, with an inert gas (i.e., nitrogen or carbon 3. Heat joints using oxy-acetylene torch. Heat to proper and uniform temperature. C. Threaded Joints: Conform to ANSI B1.20.1, tapered pipe threads for field cut threads. Join pipe fittings and valves as follows: 1. Note the internal length of threads in fittings or valve ends, and proximity of internal seat or wall, to determine how far pipe should be threaded into joint. 3. Apply appropriate tape or thread compound to the external pipe threads (except where 4. Assemble joint wrench tight. Wrench on valve shall be on the valve end into which the D. Damaged Threads: Do not use pipe with threads which are corroded or damaged. If a weld opens during cutting or threading operations, that portion of pipe shall not be used.Welded Joints: Comply with the requirement in ASME Code B31.9-"Building Services Piping." E. Flanges Joints: Align flanges surfaces parallel. Assemble joints by sequencing bolt tightening to make initial contact of flanges and gaskets as flat and parallel as possible. Use suitable lubricants on bolt threads. Tighten bolts gradually and uniformly using torque wrench. F. Grooved Joints: Assemble joints in accordance with fitting manufacturers written G. CPVC Joints: Prepare surfaces to be solvent cemented by wiping with a clean cloth moistened with acetone or methylethyl keytone. Solvent cement joints in accordance with A. General Duty Valve Applications: Where specific valve types are not indicated, the 1. Shut-off duty: Use gate, ball, and butterfly valves. 2. Throttling duty: Use globe, ball, and butterfly valves. 3. Install shut-off duty valves at each branch connection to supply mains, at supply connection to each piece of equipment, and elsewhere as indicated. 4. Install throttling duty valves at each branch connection to return mains, at return connections to each piece of equipment, elsewhere as indicated. B. Install calibrated plug valves on the outlet of each heating or cooling element and elsewhere as required to facilitate system balancing. C. Install drain valves at low points in mains, risers, branch lines, and elsewhere as required D. Install nonslam check valves on each pump discharge and elsewhere as required to control E. Install pump discharge valves with stem in upward position; allow clearance above stem for F. Install safety relief valves on hot water generators, and elsewhere as required by ASME G. Pipe discharge to floor without valves. Comply with ASME Boiler and Pressure Vessel Code Section VIII, Division 1 for installation requirements. H. Install pressure reducing valves on hot water generators, and elsewhere as required to A. Install manual air vents at high points in the system, at reheat coils and elsewhere as B. Install automatic air vents at the top of main risers and at heat transfer coils in air handling C. Install air separator in pump suction lines. Run piping to compression tank with 1/4 inch per foot (2 percent) upward slope towards tank. Install blowdown piping with gate valve; extend to nearest drain. D. Install pump suction diffusers on pump suction inlet, adjust foot support to carry weight of suction piping. Support from inertia base when one is used. Install nipple and ball valve in E. Install pump discharge valves in horizontal or vertical position with stem in upward position. Allow clearance above stem for check mechanism removal. F. Install shot-type chemical feeders in each hydronic system where indicated; in upright position with top of funnel not more than 48 inch above floor. Install feeder in bypass line, off main using globe valves on each side of feeder and in the main between bypass connections. Pipe drain, with ball valve, to nearest equipment drain. G. Install compression tanks above air separator. Install gauge glass and cocks on end of tank. Install tank fitting in tank bottom and charge tank. Use manual vent for initial fill to establish proper water level in tank. 1. Support tank from the floor or structure above sufficient for the weight of the tank, piping connections, and fittings, plus weight of water assuming a full tank of water. Do not overload building components and structural members. A. Preparation for testing: Prepare hydronic piping in accordance with ASME B 31.9 and as follows: 1. Leave joints including welds uninsulated and exposed for examination during the test. 2. Provide temporary restraints for expansion joints which cannot sustain the reactions due to test pressure. If temporary restraints are not practical, isolate expansion joints 3. Flush system with clean water. Clean strainers. 4. Isolate equipment that is not to be subjected to the test pressure from the piping. If a valve is used to isolate the equipment, its closure shall be capable of sealing against the test pressure without damage to the valve. Flanges joints at which blinds are inserted to isolate equipment need not be tested. 5. Install relief valve set at a pressure no more than 1/3 higher than the test pressure, to protect against damage by expansion of liquid or other source of overpressure during B. Testing: Test hydronic piping as follows: 1. Use ambient temperature water as the testing medium, except where there is a risk of damage due to freezing. Another liquid may be used if it is safe for workmen and compatible with the piping system components. 2. Use vents installed at high points in the system to release trapped air while filling the system. Use drains installed at low points for complete removal of the liquid. 3. Examine system to see that equipment and parts that cannot withstand test pressures are properly isolated. Examine test equipment to ensure that it is tight and that low pressure filling lines are disconnected. 4. Subject piping system to a hydrostatic test pressure which at every point in the system is not less than 1.5 times the design pressure. The test pressure shall not exceed the maximum pressure for any vessel, pump, valve, or other component in the system under test. Make a check to verify that the stress due to pressure at the bottom of vertical runs does not exceed either 90 percent of specified minimum yield strength, or 1.7 times the "SE" value in Appendix A of ASME B31.9, Code For Pressure Piping, Building Services Piping. 5. After the hydrostatic test pressure has been applied for at least 10 minutes, examine piping, joints, and connections for leakage. Eliminate leaks by tightening, repairing, or replacing components as appropriate, and repeat hydrostatic test until there are no leaks. A. Clean and flush hydronic piping systems. Remove, clean, and replace strainer screens. After cleaning and flushing hydronic piping system, but before balancing, remove disposable fine mesh strainers in pump suction diffusers. B. Mark calibrated name plates of pump discharge valves after hydronic system balancing has been completed, to permanently indicate final balanced position. C. Chemical Treatment: Provide a water analysis prepared by the chemical treatment supplier to determine the type and level of chemicals required for prevention of scale and corrosion. Perform initial treatment after completion of system testing. A. Fill system and perform initial chemical treatment. B. Check expansion tanks to determine that they are not air bound and that the system is C. Before operating the system perform these steps: 1. Open valves to full open position. Close coil bypass valves. 2. Remove and clean strainers. 3. Check pump for proper direction; correct improper wiring. 4. Set automatic fill valves for required system pressure. 5. Check air vents at high points of systems and determine if all are installed and operating freely (automatic type) or to bleed air completely (manual type). 6. Set temperature controls so all coils are calling for full flow. 7. Check operation of automatic bypass valves. 8. Check and set operating temperatures of boilers, chillers and cooling towers to design
Lung Transplantation: A Decade of Experience Susan D. Moffatt, MD, PhD,a Philippe Demers, MD,a Robert C. Robbins, MD,a Ramona Doyle, MD,bAnn Wienacker, MD,b Noreen Henig, MD,b James Theodore, MD,b Bruce A. Reitz, MD,a andRichard I. Whyte, MDa Background: Over the past 3 decades, the field of lung transplantation has been refined. However, many barriersexist that limit long-term success. The