PART 1: GENERAL 1.01 DESCRIPTION: A. General provisions and other plumbing systems are specified in other Sections of Division 22. B. This Section includes furnishing, installing and testing laboratory systems including compressed air, vacuum, chemical-resisting waste, and chemical-resisting vent, as indicated on the Drawings. C. See Section 22 42 00, Plumbing Fixtures for fixtures and trim. D. See Section 22 43 00, Drainage Systems for drainage, waste, and vent systems. E. See Section 22 44 00, Water Systems for water systems. F. See Section 22 45 00, Fuel Gas Systems for fuel gas systems. G. Plumbing commissioning is specified in Section 22 00 90, Commissioning. This Section includes responsibilities and obligations in support of the commissioning process specified therein. H. Electrical power wiring of air compressors, vacuum pumps, and modular accessories associated with the laboratory systems is covered under Division 26. I. Electrical low voltage wiring and wiring of packaged equipment and accessories shall be provided under this Section. J. Vibration isolation for equipment and piping is specified in Section 22 00 10, General. 1.02 QUALITY ASSURANCE: A. Conform to the following: 1. CGA G-4.1-2009. 2. CGA G-7-2008. 3. CGA G-7.1-2004 4. NFPA 55-2010. 5. NFPA 70-2005. 6. NFPA 99-2012. B. Equipment shall be UL listed. Comply with local, state and federal codes applicable to this installation. 1.03 RELATED EQUIPMENT: A. The furnishing, delivering, uncrating and installation of laboratory equipment and trim is specified in another Division. B. Gas turrets and faucets for laboratory compressed air, laboratory vacuum, and water, except as specified otherwise herein, will be furnished with the laboratory equipment and installed by the laboratory equipment installer. 1.04 MANUFACTURING REQUIREMENTS: A. One manufacturer, unless otherwise specified herein, shall supply the laboratory systems equipment, including the sources of supply. The manufacturer shall have a product specialist periodically check with the Contractor during installation of the systems and equipment. B. The manufacturer shall have a service department to provide ongoing service support to the Owner. ETB #0914 22 48 00-1 North Central Advanced Technology Center
1.05 CERTIFICATION REQUIREMENTS: A. A separate service organization shall certify laboratory systems. B. Specialty piping joint certification: installers shall be certified by the manufacturer of the electric coil socket thermal fusion piping joint systems prior to installation. PART 2: PRODUCTS 2.01 PIPING AND FITTINGS: A. General: 1. Piping and fitting sizes listed are nominal inside diameter. B. Chemical resisting waste and vent, below grade: 1. Piping: polypropylene, schedule 40, ASTM D4101-2011. 2. Fittings: drainage pattern DWV polypropylene. 3. Joints: electric coil socket thermal fusion. C. Chemical resisting waste and vent, above grade: 1. Piping: polypropylene, fire retardant, schedule 40, ASTM D4101-2011. 2. Fittings: drainage pattern polypropylene, fire retardant. 3. Joints: mechanical at sink P-traps and waste arms and connections to neutralization tanks, and electric coil socket thermal fusion elsewhere. D. Argon, carbon dioxide, argon-carbon dioxide mixture, oxygen, compressed air and vacuum, 0.5" and larger, for building distribution. Wetted surfaces shall be cleaned and capped for oxygen service. 1. Piping: seamless copper tubing, type L, hard drawn, ASTM B819-2000 (2006). 2. Fittings: wrought copper fittings, ASME B16.22-2001 (R2005). 3. Joints: brazed with brazing filler metal, BcuP-3, silver-phosphorous, with a melting point range of 1300 F to 1500 F, AWS A5.8/A5.8M-2004. a. Manufacturer: Airco, Handy & Harman, or Harris. 4. Flux: as approved by brazing alloy manufacturer. E. Acetylene, above grade, including connections to equipment: 2.02 VALVES: A. General: 1. Piping: black steel, schedule 40, ASTM A53/A53M-2010. 2. Fittings: standard weight malleable iron, ASME B16.3-2006. 3. Joints: threaded. 1. Valves of the same piping type shall be of the same manufacturer, unless specified otherwise herein. ETB #0914 22 48 00-2 North Central Advanced Technology Center
B. Ball Valves - Copper Tubing: 1. Ball valves for use with brazed copper tubing 0.5" to 2": bronze body, quarter turn on/off with lever handle, factory-cleaned and sealed for oxygen service. 2. Valves 0.5" in size shall be 1-piece type with bronze body, stainless steel ball and stem with 1000 psig working pressure with factory-supplied tube stubs. a. Manufacturer: Apollo, NIBCO, Stockham, or Watts. 3. Valves 0.75" and larger shall be bolted union-ball type. Body shall be cast or forged bronze, swingaway type with stainless steel ball, designed for vacuum and working pressure up to 400 psig. a. Manufacturer for brazed tubing systems: Apollo, NIBCO, Stockham, or Watts. 4. Seat and stem seals shall be designed for the gas system intended. C. Ball Valves Steel Piping: 1. Ball valves for use with threaded steel piping 0.75 and larger: carbon steel body, quarter turn on/off with lever handle. 2. Valves 0.75 and larger shall be 3-piece construction with enclosed fasteners. Body shall be carbon steel, full port, steel trim and hardware, swing-away type with stainless steel ball, designed for working pressure of up to 1500 psig. Gaskets and seals shall be compatible with acetylene service. 3. Manufacturer: Apollo, NIBCO, Stockham, or Watts. 2.03 SPECIALTY PIPING JOINTS: A. Unions: 2.04 AIR COMPRESSORS: 1. For copper piping 2" or smaller: cast brass or bronze with copper soldered connections. Where applicable, wetted surfaces shall be cleaned and capped for oxygen service. 2. For piping larger than 2": flange and gasket type. Wetted surfaces shall be cleaned and capped for oxygen service. A. Oil-less Scroll: 1. Assembly shall be constructed in accordance with the NFPA 99-2012 and shall consist of base or stack-mounted oil-less scroll-type compressors and motor units. Assembly shall be furnished with a vertical receiver, control cabinet, inline air intake filter/mufflers, dewpoint and carbon dioxide monitors, regulators, bypass piping, compressor isolation valves, alarms, and duplex desiccant air dryers. Number of compressors shall be as indicated on the Drawings. 2. Components shall be pre-piped using type K copper tubing with brazed joints to a single discharge point and single air intake. Electrical components shall be pre-wired to a single point electrical connection. Condensate drains shall be piped to a single point drain connection. 3. Compressors: a. Compressors shall be the continuous duty-rated scroll type with sealed bearings and rated for minimum 110 psig discharge pressure. The compressors shall be single-stage and aircooled and shall consist of one fixed and one orbiting scroll with PTEE tip seals. The scrolls shall have a two-part face seal to prevent contamination. Orbiting bearings shall be greasefilled and permanently-sealed and shall not require lubrication. The drive bearing shall be grease-filled and lip-sealed with a maintenance interval of not less than 10,000 hours. The scroll case shall be constructed of die-cast aluminum and shall have integral cooling fan and air ducting for heat dissipation. ETB #0914 22 48 00-3 North Central Advanced Technology Center
b. Each compressor shall be provided with an integral air-cooled aftercooler and automatic solenoid drain valve, piped intake manifold with inline inlet air filter, isolation valve, high inlet vacuum switch, check valve, safety valve, motor, belts, and belt guard. Each compressor shall also have a wired high-discharge air temperature shutdown switch. c. The compressor discharge inline shall include a flex connector, safety relief valve, isolation valve, and check valve. The discharge piping of each compressor shall incorporate an integral valve, to provide load-less starting and rapid air evacuation between the check valve and scroll discharge. Discharge air piping shall be of ASTM B-819 copper tubing, brass, or stainless steel. Discharge flex connectors shall be braided 304 stainless steel, brass, or bronze. 4. Motors: NEMA premium-efficiency type in accordance with NEMA MG1-2009 (R2010), open dripproof, 3600 rpm, 1.15 service factor, with pivoting motor mounting base that is fully adjustable with one screw to achieve belt tensioning. 5. Controls shall be housed in a UL-listed NEMA 12 dust-tight electrical control cabinet with door interlock, hand-off-auto selector switches, circuit breaker disconnects for each motor with external operators, full-voltage motor starters with short circuit, single phase, and thermal overload protection, 120 V control circuit transformers for each motor circuit, and remote alarm contacts. Controller shall be configured to accommodate the number of compressors indicated on the Drawings. Controller shall be capable of automatic lead/lag sequencing with provisions for simultaneous operation. Controller shall be provided with a touch-screen human-machine interface that displays, at a minimum, system pressure, dew point, carbon monoxide level, pump operation, accumulated time, maintenance interval, system history, and fault conditions. Controller shall also be provided with silence button, visual and audible alarms, and contacts for connection to the building automation system for master alarm. 6. The compressor and motor shall be fully-isolated from the system base by means of a four-point, heavy-duty system that gives a minimum of 95% isolation efficiency. 7. Dryer/filter/regulator System: a. Each desiccant dryer shall be individually-sized for peak calculated demand and shall be capable of producing a pressure dew point of no greater than 10ºF. Dryer purge flow shall be minimized through an integral demand-based purge-saving control system. b. The inlet to each dryer shall include a mounted pre-filter rated for 0.01 micron with automatic drain and element change indicator. c. Fully-duplexed final line filters rated for minimum 1 micron with element change indicators, duplexed final line regulators, and duplexed safety relief valves shall be factory-mounted and piped downstream of the dryers. 8. Dew Point Hygrometer/CO Monitor: a. The dew point monitor shall be pre-piped and pre-wired and shall be the ceramic type. The system accuracy shall be ±2ºF. The alarm shall be factory-set at 36ºF and shall be fieldadjustable. A high dew point condition shall trigger visual and audible alarms. The monitor shall have remote contacts. b. The CO monitor shall be pre-piped and pre-wired and shall have a system accuracy of ±2 PPM (at 10 PPM) for carbon monoxide. The CO condition shall trigger visual and audible alarms. The monitor shall have remote contacts. 9. The air receiver shall be corrosion-resistant, shall be rated for a minimum of 200 psig, and shall be designed, constructed, certified, and stamped in accordance with ASME BPVC-VIII-1-2010. The receiver shall have a 0 psig to 200 psig pressure gauge, pressure relief valve, manual drain valve, unloader pressure lines, 3-valve bypass with piping, sight glass, automatic drain with pet cock, and steel support base welded to the receiver s underside. 10. The system shall be arranged such that its dimensions do not exceed 100" x 74". ETB #0914 22 48 00-4 North Central Advanced Technology Center
11. Factory test: Each assembly shall be 100% tested at the factory prior to shipment and certified in writing that it was tested at and meets the Project s maximum flow requirement with the Project s scheduled minimum outlet pressure. The test report shall accompany the assembly as part of its official documentation. 12. Documentation: System drawings, description of control panel with wiring diagrams, certification of manufacturer s liability insurance, documentation of third party labeling (that components are a system for the intended use), factory test report, operating and maintenance manuals with parts list, and system warranty. 13. Warranty: Each system, in whole and in part, shall be warranted in writing by the manufacturer for a period of 30 months from the date of shipment or 24 months from the date of start-up, whichever comes first. The warranty shall include defects in the design and construction of the assembly, including parts and components. A warranty covering shipping cost of parts and components to and from the manufacturer to the site, contractor s labor, travel cost, and overtime labor rates (if applicable) for the repairs shall be provided for 18 months from the date of shipment or 12 months from start-up, whichever comes first. 14. Start-up: a. A factory-trained representative shall start up the air compressor system. b. The representative shall check the electrical wiring connection and the building piping connections before turning on the compressor system. A start-up report shall be filled out by the representative for inclusion in the operation and maintenance manuals. c. The system shall be operated and failures created in order to test each requirement for the building automation system. 15. Owner Training: a. The Owner and/or the Owner s designees shall be trained by a factory-trained representative. b. The training shall include the following: 1) System s operation, troubleshooting, alarms, and reset features. 2) Replacement of motors, seals, compressors, and lubricant oil. 3) Replacement of control panel fuses and pilot lights. 4) The interface with the building automation system. B. Manufacturer: Amico A-SCD series, BeaconMedaes SAS series, or Patton's Medical 62-43 series. 2.05 VACUUM PUMPS: A. Oil-free Non-contacting Claw: 1. Assemblies shall be constructed in accordance with NFPA 99-2012 and shall consist of basemounted or tank-mounted motor-driven pump units, with control cabinet, isolation valves between pumps and receiver, interconnection wiring, piping and fittings, mufflers, alarms, and vacuum gauges on the inlets of each pump. Number of pumps shall be as indicated on the drawings. 2. Components shall be pre-piped using schedule 40 galvanized or black steel piping with screwed joints, and ready for single-point connection to each power feeder. Base-mounted units shall be assembled on heavy duty fabricated steel sub-bases. 3. Pumps: a. Pumps shall be continuous duty oil-free type, capable of continuous operation over the entire working pressure range of 0" to a minimum of 22.5" Hg, and selected so that the ETB #0914 22 48 00-5 North Central Advanced Technology Center
pump operates at the most efficient part of the curve. Systems shall be able to meet the vacuum demands continuously. b. Pumps shall be the direct-drive, air-cooled, single-stage, dry-running, non-contacting rotary claw type. Each pump shall use two ductile iron claw type rotors rotating in opposite direction inside a cast iron housing. The timing of the rotors shall be maintained by an oilsplash lubricated gear set which is separated from the pumping chamber by seals. No oil shall be allowed in the pumping chamber. c. Each pump shall be equipped with the following: a 5 micron particulate inlet vacuum filter, vacuum relief valve, check valve to prevent backflow through off-cycle units, flexible connector, isolation valve, high discharge temperature switch, high inlet vacuum switch, oil drain valve, oil sight glass, and exhaust muffler. 4. Motors: premium efficiency, NEMA-rated, C-face, TEFC, tri-wound type. Motors shall be designed for a Class B temperature rise and have Class F insulation. 5. Controls: a. Controls shall be housed in a UL listed NEMA 12 dust-tight electrical control cabinet with circuit breaker disconnect switches for each motor, magnetic motor starters with 3-phase overload protection and reset switches, phase failure and phase reversal protection devices for the motors, thermal malfunction protection devices for abnormal temperature shutdown of individual units, 120 V control circuit transformers with primary and secondary protection, step programmer, automatic alternator, vacuum control switches, and a lag pump in-use alarm with light and audible alarm (with silence button) on the cabinet. b. Cabinet covers shall include hand-off-automatic selector switches, hour meters, reset buttons, indicating lights, and safety disconnect handles. Indicating lights shall be LED type. Control panel shall also include a vacuum gauge. Control shall be provided with a touchscreen human-machine interface that provides, at a minimum, vacuum level display, runtime, alarm history, trouble-shooting, maintenance schedule and history, and service indicator. c. Contacts in each control panel shall allow connections to the building automation system for master alarm. 6. Receivers: horizontal type, with a 0-30 Hg chemical-resistant vacuum gauge, pressure inlet valve, manual drain valve, 3-valve bypass with piping, sight glass, and automatic drain with pet cock. Receiver shall be designed, constructed, certified, and stamped in accordance with the latest version of ASME BPVC-VIII-1. Receiver shall be mounted above the vacuum pumps on the system frame. 7. Factory test: Each assembly shall be 100% tested at the factory prior to shipment and certified in writing that it was tested at and meets the Project s maximum flow requirement with the Project s scheduled minimum outlet pressure. The test report shall accompany the assembly as part of its official documentation. 8. Documentation: System drawings, description of control panel with wiring diagrams, certification of manufacturer s liability insurance, documentation of third party labeling (that the components are a system for the intended use), factory test report, operation and maintenance manuals with parts list, and system warranty. 9. Warranty: Each system, in whole and in part, shall be warranted in writing by the manufacturer for a period of 30 months from the date of shipment or 24 months from the date of start-up, whichever comes first. The warranty shall include defects in the design and construction of the assembly, including parts and components. A warranty covering shipping cost of parts and components to and from the manufacturer to the site, contractor s labor, travel cost, and overtime labor rates (if applicable) for the repairs shall be provided for 18 months from the date of shipment or 12 months from start-up, whichever comes first. 10. Start-up: a. A factory-trained representative shall start up the air compressor system. ETB #0914 22 48 00-6 North Central Advanced Technology Center
b. The representative shall check the electrical wiring connection and the building piping connections before turning on the compressor system. A start-up report shall be filled out by the representative for inclusion in the operation and maintenance manuals. c. The system shall be operated and failures created in order to test each requirement for the building automation system. 11. Owner Training: a. The Owner and/or the Owner s designees shall be trained by a factory-trained representative. b. The training shall include the following: 1) System s operation, troubleshooting, alarms, and reset features. 2) Replacement of motors, seals, compressors, and lubricant oil. 3) Replacement of control panel fuses and pilot lights. 4) The interface with the building automation system. 12. Manufacturer: Amico V-CCD series or Patton's Medical 74-25 series. 2.06 COMPRESSED AIR REGULATORS: A. Regulator constructed of stainless steel or epoxy-coated aluminum body, glass-filled nylon bonnet, Buna-N elastomer seals, and brass or stainless steel seat. Regulator shall have reinforced diaphragm, three-position non-rising adjustment knob, tamper-proof cap, and pressure gauge. Regulating range shall be from 10 to 250 psi. 1. Manufacturer: Arrow, Parker, or Western Enterprises. 2.07 QUICK CONNECT FITTINGS AND ACCESSORIES: A. Quick connect fittings for use in ceiling service panels and at walls shall be nickel-plated brass and shall consist of an 0.375" bulkhead fitting for ceiling panel or wall and nipple and coupler with band color-keyed to each specific service. Quick connect fittings shall be supplied with brass unions. 1. Manufacturer for quick connect fittings: Fisher Hamilton 547H051X series. 2. Manufacturer for unions: Fisher Hamilton 547H0526. B. Quick connect fittings for service tubing shall be nickel-plated brass and shall consist of a 0.375" fitting for tube ends and nipple and coupler with band color-keyed to each specific service. 1. Manufacturer: Fisher Hamilton 547H050X series. C. Service tubing for compressed air, vacuum, and water shall be white 0.375" polyethylene tubing, minimum 60" long. 1. Manufacturer: Fisher Hamilton 547H0542. 2.08 ZONE VALVES AND BOXES 1. Valves: a. Ball valves 4" and smaller: bronze body bolted union-ball type with swing-away design, brass or bronze ball, and type K copper tubing extensions with dual gauge/purge ports. Valves shall be designed for 600 psig wog working pressure. ETB #0914 22 48 00-7 North Central Advanced Technology Center
2.09 Valves shall be provided with gauges. 1. Boxes: b. Valves for vacuum service shall be stamped and rated for the vacuum service indicated on the Drawings. c. Valves shall be factory cleaned for oxygen service. a. Boxes shall be constructed of minimum 18 gauge sheet metal with a white epoxy finish. b. Covers shall consist of an anodized extruded aluminum frame with mitered welded corners, window opening, and wall adjustment for up to 1". c. Windows shall be transparent or opaque with pull ring to remove in an emergency. Windows shall be replaceable without the use of special tools, and shall be labeled "Caution - Close Only in Emergency". 2. Manufacturer: Amico VBU-M series, Beacon Medaes 150XXX-00 series, Ohio Medical 26190X series, or Gentec AVB series. 2.10 MEDICAL GAS OUTLETS/INLETS 1. Wall Outlets/Inlets, Quick-Connect Recessed Type: 2.11 MEDICAL GAS ALARM PANELS a. Quick-connect recessed wall outlets for oxygen, and medical air, and inlets for medical vacuum. Units shall consist of separate roughing-in and finish assemblies, and shall be modular in design. b. Roughing-in assemblies shall be corrosion-resistant with a secondary check valve and a permanent pin-keying system for each specific gas. Copper tubing inlets shall rotate 360 to allow connection from any direction. The assembly shall allow pressure testing without additional labor to remove plug or adapter after testing. c. Finish assemblies shall contain a primary check valves, latch ( Chemetron )-style indexing, a minimum of 2.5 in² of color coding and shall incorporate an automatic plaster adjustment up to 0.5" over standard 0.5" wall finish. Quick-release mechanism shall not be incorporated into the outlet. Outlet design shall be such as to ensure absolutely no gas flow until the correct adapter is fully engaged. Assemblies shall have separate coverplates for each gas. d. Each vacuum inlet shall have an adjacent slide for supporting a vacuum bottle assembly. e. Manufacturer: Amico O-CHWAL-U-XXX series, Beacon Medaes 6-12104X-00 series, Ohio Medical 261020 series, or Gentec 38-X-3-U-X-X series. 1. Area Alarm Panels: a. Alarms shall be the audio-visual, closed-circuit, modular, line pressure, self-monitoring type. b. Alarm panels shall be the modular type with micro-processor based display and sensor boards, integral 120/24 V 25 W transformers, pressure sensor switches, and full range line pressure gauges. Each panel shall be capable of connection to the building automation system. Each panel shall be provided with LED digital readouts for pressurized gasses and vacuum and LEDs for normal and abnormal line pressures and alarm conditions. c. Roughing-in assemblies shall have self-sealing check valves for removal of finish assembly for service without shutting down system. Alarms shall be equipped with remote sensors. d. Manufacturer: Amico A2ADR-U series, BeaconMedaes 6-TA2AR series, Ohio Medical 26185X series, or Gentech BAA-R series. ETB #0914 22 48 00-8 North Central Advanced Technology Center
2.12 CHEMICAL RESISTANT DRAINS: A. Finished Area Drains (Series CR-D1): 1. CR-D1A: fire retardant polypropylene body and round grate with flashing clamp, and vandal resistant grate, ASTM D4101-2010. Drain outlets shall match joint requirements for below grade, and above grade piping as applicable. 2.13 CHEMICAL RESISTANT CLEANOUTS: a. Manufacturer: George Fisher FD-PPFR, Orion AWFDSTD-PP, or Zurn Z9A-FD4. A. For concealed chemical resisting piping in floors: corrosion resistant fire retardant polypropylene conforming to ASTM D4101-2010, having a ferrule with counter sunk gas tight plug, and adjustable round nickel bronze top. Top shall be cast with the acronym AWCO (Acid Waste Cleanout). 1. Manufacturer: George Fisher FCO-PP, Orion FCO-SQ-PP for tile floors and FCO-RD-PP for other floors, or Zurn Z9A-CO4. 2.14 CHEMICAL NEUTRALIZATION TANKS: A. Single Fixture Tanks: 1. Polypropylene single-wall, 5 gal, ASTM D4101-2010, for continuous operation at temperatures up to 212º F with flanged type bolted cover with stainless steel nuts and bolts. Each tank shall have 2" threaded or flanged inlet, outlet, and vent connections. 2. Limestone shall have a calcium carbonate content of 90% or higher, and a size range of 1" to 3". 3. Manufacturer: Orion, Schier, Scientific Plastics, or Town & Country Plastics. 2.15 GAS CYLINDER MANIFOLDS (EXCEPT ACETYLENE): A. Wall-mounted cabinet with manifold, automatic cylinder-bank change-over with alarm, and designed to accommodate 2 equal banks of argon, carbon dioxide, argon-carbon dioxide mixture, or oxygen gas cylinders. B. Enclosures: 16 gauge steel with baked enamel finish, hinged lockable doors, and identification lettering for the gas served. C. Controls: 1. Units shall be controlled by a pressure differential change-over system that switches automatically from cylinder bank-in-use to reserve bank, without any fluctuation in delivery line pressure. 2. Provide a visual and audible alarm panel with audible silence button, to alarm at each cylinder bank change-over, and step-down transformer to energize the alarm system. D. Manifold Components: a. Piping and valves in contact with the gas shall be copper/bronze and rated for the gas type and pressure being used. b. The left and right bank headers shall include a high pressure rated isolation valve at the control end, and a high pressure check valve at each cylinder connection. c. 2 cylinder bank regulators to reduce the gas pressure in each bank line to an intermediate pressure of 200 psig, and 1 delivery line regulator, set for the system's pressure. Regulators shall be brass or bronze with a stainless steel diaphragm. d. 2 cylinder bank, and 1 delivery line pressure gauges. e. Internal relief valves as required to protect the manifold and control panel piping. ETB #0914 22 48 00-9 North Central Advanced Technology Center
f. The external header and pigtail connections shall be selected for each specific gas and supplied by the manifold manufacturer. Pigtail connections shall be a minimum 24" long flexible type. Pigtails shall be metal or soft core hose. E. Provide each assembly with the manufacturer's installation kit, including panel mounting and header wall supports. F. Manifold assemblies shall be oxygen cleaned, and shall conform to NFPA 55-2010. G. Each gas cylinder manifold assembly shall be provided with a one year full manufacturer's warranty against product defects from the time of the Owner's acceptance of the facility. H. Manufacturer: CONCOA 522 Series, Square One PDSM series, or Western LAB series. 2.16 ACETYLENE GAS CYLINDER MANIFOLDS: A. Wall-mounted cabinet with manifold, automatic cylinder-bank change-over with alarm, and designed to accommodate 2 equal banks of acetylene gas cylinders. B. Enclosures: 16 gauge steel with baked enamel finish, hinged lockable doors, and identification lettering for the gas served. C. Controls: 1. Units shall be controlled by a pressure differential change-over system that switches automatically from cylinder bank-in-use to reserve bank, without any fluctuation in delivery line pressure. 2. Provide a fuel gas alarm kit. D. Manifold Components: a. Piping, fittings, and valves in contact with the gas shall be stainless steel, brass, and copper and rated for the gas type and pressure being used. b. The left and right bank headers shall include a high pressure rated isolation valve at the control end, and a high pressure check valve at each cylinder connection. c. 2 cylinder bank regulators to reduce the gas pressure in each bank line to an intermediate pressure of 200 psig and 1 delivery line regulator, set for the system's pressure. Regulators shall be brass or bronze with a fabric reinforced neoprene diaphragm. d. 2 cylinder bank, and 1 delivery line pressure gauges. e. Internal relief valves as required to protect the manifold and control panel piping. f. The external header and pigtail connections shall be selected for each specific gas and supplied by the manifold manufacturer. Pigtail connections shall be a minimum 24" long flexible type. Pigtails shall be flexible stainless steel. g. Flashback arrestor and piping, and individual flashback arrestor and check valves on pigtails. E. Provide each assembly with the manufacturer's installation kit, including panel mounting and header wall supports. F. Each gas cylinder manifold assembly shall be provided with a one year full manufacturer's warranty against product defects from the time of the Owner's acceptance of the facility. G. Manufacturer: CONCOA 635 Series or Western BI series. ETB #0914 22 48 00-10 North Central Advanced Technology Center
PART 3: EXECUTION 3.01 GENERAL PIPING INSTALLATION: A. General: 1. Piping shall be cut to measurements established at the site and worked into place without springing or forcing. 2. Use concentric reducing fittings between different size pipes. 3. Ream piping after cutting, turn on end to knock loose any filings from interior of pipe. 4. Take-offs from horizontal piping shall be above the pipe's center line at an angle of 45º or greater above the horizontal. 5. Isolate metal piping from dissimilar metals. 6. Plastic piping shall not be stored in direct sunlight or at temperatures higher than 90 F. B. Underground: 1. Install piping outside the building in trenches separate from sewers. 2. Excavation and backfill: as specified in Section 22 00 10, General. 3. Piping installed below the level of footings shall be installed 12" horizontally from the footing for each 12" of depth below the footing. 4. Buried piping shall be protected against frost, corrosion, and physical damage. 5. Underground polypropylene piping shall be placed on a bed of compacted sand, minimum 4" thick. Backfill open spaces on sides and to 12" above piping with sand and compact. C. Aboveground: 1. Piping shall be installed to permit free expansion and contraction without damage to joints, hangers, or the building. Arrange piping to minimize stresses caused by expansion and contraction. 2. Group exposed pipe together and parallel at the same side distance apart. 3. Install piping so as to preserve access to valves and equipment and to provide the maximum headroom possible. 4. Provide offsets to maintain ceiling height and to coordinate with other trades. D. Piping Joints: 1. Brazed joints shall be made with a gas brazing process. During the brazing of pipe connections, the interior of the pipe shall be purged continuously with oil-free dry nitrogen. The flow of purge gas shall be maintained until the joint is cool to the touch. The outside of the tube and fittings shall be cleaned by washing with hot water after assembly. 2. Threaded connections: at connections to equipment, screw-thread joints shall be made with cut tapered threads. Joints shall be tinned using soft solder or made up with Teflon tape. Not more than 2 threads shall show after the joint is made tight. 3. Flanged joints: at connections to equipment, flanged joints shall be made with ring type gaskets, extending to inside of bolt holes. Flanged connections to equipment shall be made with full-face gaskets to match flanges on equipment. 4. Flux shall be used only to join copper to brass or bronze. Copper-to-copper joints shall be brazed without flux. Exercise care in applying flux to avoid leaving any excess inside the completed joints. ETB #0914 22 48 00-11 North Central Advanced Technology Center
The exterior of each fluxed joint shall be washed with hot water after assembly to remove excess flux for clear visual inspection of brazed connections. 5. Insulate joints between dissimilar metals and connections to tanks with dielectric fittings. 6. Provide flanges or unions at connections to equipment. 3.02 POLYPROPYLENE PIPE AND FITTINGS: A. Assemble in accordance with manufacturer's recommendations. 3.03 COPPER TUBING AND FITTINGS: A. Clean, prime, and paint exposed piping with 2 coats of glossy silver paint. 3.04 SPECIALTY PIPING JOINTS: A. Unions: 1. Provide in each connection to each piece of equipment, except where flanges are used. 3.05 CHEMICAL DILUTION/NEUTRALIZATION TANKS: A. General: 1. Install tanks in accordance with manufacturer s instructions. 2. Prior to installation, inspect tank s inside and outside for any damage. Damaged tanks shall not be installed. 3. Install tanks on a smooth flat surface, free of debris, so that the tank's bottom is fully supported. B. Neutralization: 1. Fill tanks to outlet level with water prior to filling with limestone. 2. Fill tanks with limestone to 1" below the tank outlet. C. Cleaning: 3.06 RELATED EQUIPMENT: A. General: 1. Keep tanks clean from dirty construction water. 2. Prior to the addition of limestone, tanks shall be cleaned. 1. After related equipment has been installed, ensure tightness of installation, and provide piping and accessories as specified herein, and make final connections. 2. Provide a valve in each corridor branch line prior to entering the laboratory, and provide a valve in each group of casework lines, within the laboratory. 3. The location and number of connections shown on the Drawings is approximate. Determine the exact number, location, and rough-in requirements from the equipment drawings and specifications. B. Equipment: 1. For pressure piping, rough-in each utility at 6" from wall or 6" above floor, unless otherwise indicated on the Drawings, with a valve and cap. 2. Provide vacuum breakers for connections requiring water, and not having built-in backflow prevention. ETB #0914 22 48 00-12 North Central Advanced Technology Center
3. Provide indirect drains with waste connections, and extend over the appropriate floor drain and turn down with an indirect connection. 3.07 PIPING AND JOINT TESTING: A. General: 1. Piping and joints shall be leak free. 2. Test piping and joints under floor slabs before slabs are poured. 3. Tests shall be made while piping and joints are exposed to view, and prior to connections to fixtures, equipment, or outlets/inlets. 4. Submit a statement certifying that piping and joints are tight and have passed the specified test. 5. Gauageable fitting joints shall be individually tested with factory-supplied inspection gauges prior to the system's pressure test. Under-tightened joints shall be retightened and reinspected. Overtightened joints shall be replaced and reinspected. B. Test chemical-resisting waste and vent systems piping and joints by capping or plugging openings, and filling each system with 10' head of water, then allowing to stand filled for 1 hour without any leak down. Where a system is tested in sections, each section shall be subjected to the same test. C. Test argon, carbon dioxide, argon-carbon dioxide mixture, oxygen, acetylene, compressed air, and vacuum systems piping by capping openings and applying an air pressure of 150 psig for 2 hours without any drop in pressure. Disconnect the air source prior to and during testing. Where the system is tested in sections, each section shall be subjected to the same test. 1. For compressed air and vacuum systems, after completion of the above test procedure, the finishing assemblies of station outlets, alarms, and components (e.g., pressure switches, gauges, and relief valves) and components (e.g., gauges, and relief valves) shall be installed and laboratory gas piping systems shall be subjected to a 24 hour standing pressure test at 20% above the normal operating line pressure. The main line isolation valve shall be closed during this test. D. Piping and Joint Leakage: 1. Leaks shall be repaired or replaced, and the system retested as specified herein. 2. Any pipe that leaks shall be removed and a new piece installed. 3. Screwed and flanged joints that leak shall be taken apart, inspected for damage and debris, and reassembled. 4. Brazed joints that leak shall be cut-out and replaced. 5. Gaugeable fitting joints that leak shall be taken apart, inspected for damage and debris, and reassembled per the manufacturer's instructions. 6. Thermally fused joints that leak may be fused one additional time only, if allowed by the manufacturer. Joints that fail the pressure test after the second fusion cycle shall be cut-out and replaced. 3.08 LABORATORY GAS PIPING CERTIFICATION: A. Certification of the laboratory cylinder gas systems (oxygen, argon, carbon dioxide, and argon-carbon dioxide mixture) shall be performed by an independent certification and service organization. B. Laboratory gas systems shall be tested as specified herein, and in accordance with NFPA 99-2012. C. Test each individual piping system component for conformance to requirements specified herein and make necessary adjustments to ensure a complete and working system. ETB #0914 22 48 00-13 North Central Advanced Technology Center
D. Tests: 1. Piping purge test: for each gas system, verify cleanliness of the piping system. Filter a minimum of 35 ft3 of gas through a clean white 0.45 micron filter at a minimum flow rate of 3.5 scfm. Filter shall show no discoloration, and shall accumulate no more than 1.0 mg of matter. Test each zone at the outlet most remote from the source. Perform test with oil-free dry nitrogen. 2. Gas source and outlet for concentration of gas, by volume: nitrogen minimum 99% nitrogen. 3. Maximum allowable variation between source gas and outlet shall not exceed the following: a. Dewpoint: 3.5 F. E. Obtain and submit a notarized letter of pipeline certification indicating: 1. That system components perform to the manufacturer's specifications. 2. That system components have been adjusted in accordance with the manufacturer's recommendations. 3. That the systems are free of cross connections. F. A written record shall be kept of each line tested. The record shall include a brief description of the system, the gas supplied, specification employed, date of the inspection for cleanliness and cross connection, the results of the inspection, the inspector's signature, and date signed. The record shall be turned over to the Owner prior to occupancy. END OF SECTION 22 48 00 ETB #0914 22 48 00-14 North Central Advanced Technology Center