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WELDING
<br />PART2- PRODUCTS
<br />2.1
<br />GENERAL
<br />PART 3- EXECUTION
<br />A. Gas cylinders shall be furnished by the Owner and installed by the Mechanical Contractor.
<br />3.01 GENERAL
<br />2.2
<br />Welding PIPING (acetylene, argon, c25, carbon dioxide, nitrogen)
<br />A. Workmanship shall be first-class in every respect. The gas manifold systems shall comply with National Fire Protection Association Booklet,
<br />NFPA No. 51, and local codes.
<br />A. Schedule 40 black pipe and welding fittings. System shall be welded throughout with exception of fittings on individual drops for connection
<br />of valves and regulators which shall be threaded.
<br />3.02 CLEANING
<br />1. P!pe Joints: All joints in the pipe, except those at valves and equipment requiring screwed connections, shall be welded. Suitable
<br />A. Before erection all pipes, valves and fittings (except those supplied expressly cleaned for this service by the manufacturer) shall be
<br />malleable iron fittings shall be employed for the installation of equipment provided with threaded connections,
<br />thoroughly cleansed of oil, grease, or other combustible materials by washing in a hot solution of sodium carbonate or trisodium phosphate
<br />2. Screwed Connections: A thin paste of litharge and glycerin shall be applied to the external threads only. Leave first thread clean if
<br />mixed in the proportions of one pound to three gallons of water. Piping shall be thoroughly blown out after assembly to remove foreign
<br />possible. Use of excess glycerin shall be avoided,
<br />materials with oil -free air or oil -free nitrogen:
<br />3. Fittin s: Where equipment requiring screwed connections is encountered, all fittings shall be threaded standard of extra heavy
<br />3.03 PROCESS
<br />malleable iron as required. Use of cast iron fittings is prohibited.
<br />A. The welding shall be done by the oxyacetylene process.
<br />2.03
<br />Welding PIPING (OXYGEN)
<br />3.4 SECTION VALVES
<br />A. Copper Tube: ASTM B 319, Type L, seamless, drawn temper that has been manufacturer cleaned, purged, and sealed for medical gas
<br />A, Shall be installed in accessible locations and supported in such a manner that forces used in their operation shall not place strain upon the
<br />service or according to CGA G-4.1 for oxygen service. Seals shall remain in place until final assembly.
<br />pipe and joints.
<br />1. General Requirements for Copper Fittings: Manufacturer cleaned, purged, and bagged for oxygen service according to CGA G-4.1.
<br />3.05 SAFETY DEVICES
<br />2. Wrought®Copper Fittings: ASME B16.22, MSS SP-73, with dimensions for brayed joints. Cleaned and capped for oxygen service.
<br />A. When required, pipe line hydraulic arresters, bursting disc assemblies and relief valves shall be correctly installed and properly supported.
<br />3. Copper Unions: ASME B16.22 or MSS SP-123, wrought copper or cast -copper alloy.
<br />4, Brazing Filler Metals: AWS A5.3/A5.3M, SCuP Series, copper -phosphorus alloys for general -duty brazing unless otherwise Indicated.
<br />3.06 HAZARDS
<br />B. Schedule 40 black pipe and welding fittings. Order pipe, tubing and fittings from manufacturer as pre -cleaned and factory sealed for oxygen
<br />A. Exposed piping conveying Fuel gas or Oxygen shall not be erected under or near high -voltage overhead power lines. Underground piping
<br />use. System shall be welded throughout with exception of fittings on individual drops for connection of valves and regulators which shall be
<br />conveying Oxygen shall not be installed in the same trench, duct or tunnel conveying power lines or fuel oil lines.
<br />threaded,
<br />3.7 ERECTION
<br />1. P!pe Joints: All joints in the pipe, except those at valves and equipment requiring screwed connections, shall be welded. Suitable
<br />A: All pipe shall be cut accurately to measurements obtained at the site of the system and shall be installed without springing or forcing. All
<br />malleable iron fittings shall be employed for the installation of equipment provided with threaded connections.
<br />piping shall be protected against mechanical injury in a manner satisfactory to authorities having jurisdiction.
<br />2, Screwed Connections: A thin paste of litharge and glycerin shall be applied to the external threads only. Leave first thread clean if
<br />possible. Use of excess glycerin shall be avoided.
<br />3.06 TESTING
<br />1 Fittin s: Where equipment requiring screwed connections is encountered, all fittings shall be threaded standard or extra -heavy
<br />A. Joint Test; After erection of piping, but prior to the installation of the service or station outlet valves and safety equipment assemblies, the
<br />malleable iron as required. Use of cast iron fittings is prohibited.
<br />system shall be subject to a test pressure equal to twice the required working pressure by means of cylinder water -pumped nitrogen. This
<br />test pressure shall be maintained until each joint has been thoroughly examined for leaks by means of soap suds or leak_ detecting solution.
<br />2.04
<br />REGULATORS, VALVES & EQUIPMENT
<br />Wipe joints clean after test.
<br />A. Oxyq�n Station Drops: Shall be RexArc Part No. 2®04�16/0G.
<br />1. All leaks shall be properly repaired and the system retested.
<br />B. Acetylene Station Drops: Shall be PexArc Pan No.2-04-161 OR.
<br />B. Joint Test: After installing service or station outlet valves and safety equipment assemblies, the system shall again be subjected to a test
<br />Ca Argon Station Drops: RexArc Part No. 2-04-1603Y
<br />pressure equal to 1_1/2 times the required working pressure by means of cylinder water pumped nitrogen. This test pressure shall be
<br />maintained until each joint has been thoroughly examined for leaks by means of soap suds. Wipe joints clean after test. All leaks shall be
<br />D. C25 Station Drops; RexArc Part No. 2-04-1603Y
<br />properly repaired and the system retested.
<br />E. CO2 Station Drops; RexArc Part No. 2-04-1600
<br />C. Final Test: Shall be a twenty-four hour standing pressure test with cylinder water -Pumped nitrogen at 1_1/2 times required working pressure
<br />to check to completeness of prior joint pressure tests.
<br />F. Flashback Arrestor: Provide flashback arrestor for fuel gas manifolds, provide with relief valve, shutoff valves, and vent thru roof.
<br />3.09 PAINTING, PROTECTIVE COATING
<br />G. Acetylene Manifold: Shall be RexArc Part No. 3-04-0543R-12.
<br />A. Before painting, all piping shall be thoroughly wire brushed to remove all rust, scale, dirt, etc., that may have formed on the surface and shall
<br />H. Oxygen Manifold; Shall be RexArc Part No. 3-04-0431 G-12 manifold for 6 cylinders; 3 usage and 3 standbys.
<br />be covered or painted with a suitable corrosion_ resisting material.
<br />1. Amon Manifold: ;Shall be RexArc Pan No. 3-04-0431A-3
<br />B. The service or station outlet drops or risers shall be identified by affixing a decal, with the name of the gas in the pipe.
<br />J. C25 Manifold: Shall be RexArc Pan No. 3-04-0543Y-6
<br />K. COI Manifold: Shall be RexArc Pan No. 3-04-0431 C-8
<br />NOTESGENERAL / SPECIFICATIONS
<br />1.
<br />ALL WORK PERFORMED SHALL BE DONE IN STRICT ACCORDANCE TO ALL APPLICABLE MECHANICAL, BUILDING, ENERGY, FUEL GAS, AND
<br />6. CONSTRUCT DUCTWORK ACCORDING TO WASHINGTON STATE ENERGY CODE SECTION C403.2.3.3. ALL DUCT WORK SHALL BE PRIMED
<br />LOCAL CODES, WITH AMENDMENTS.
<br />GALVANIZED SHEET STEEL, LOCK FORMING
<br />QUALITY, FABRICATED IN ACCORDANCE TO SMACNA STANDARDS.
<br />2.
<br />WHERE USED, THE TERM "PROVIDE" SHALL MEAN "FURNISH AND INSTALL".
<br />7; PROVIDE TURNING VANES IN ALL MITERED RECTANGULAR DUCT ELBOWS & TEES.
<br />3.
<br />COORDINATE EQUIPMENT CONNECTIONS WITH MANUFACTURERS' CERTIFIED DRAWINGS. COORDINATE AND PROVIDE DUCT AND PIPING
<br />TRANSITIONS REQUIRED FOR FINAL EQUIPMENT CONNECTIONS TO FURNISHED EQUIPMENT, FIELD VERIFY AND COORDINATE DUCT AND
<br />3. ALL SUPPLY AND RETURN DUCTWORK SHALL BE INSULATED PER WASHINGTON STATE ENERGY CODE SECTION C403.2.3.2.
<br />PIPING DIMENSIONS BEFORE FABRICATION.
<br />9. OUTSIDE AIR DUCTS SERVING INDIVIDUAL SUPPLY AIR UNITS LESS THAN 2300 CFM SUPPLY CAPACITY SHALL BE INSULATED TO R-7.
<br />4.
<br />LOCATIONS AND SIZES OF FLOOR, AND WALL OPENINGS SHALL BE COORDINATED WITH OTHER TRADES INVOLVED. INCLUDE IN THE COST
<br />OF MECHANICAL WORK, CUTTING, CORING, PATCHING AND PAINTING OF EXISTING WALLS, CEILINGS, FLOORS AND ROOFS AS REQUIRED TO
<br />10. PROVIDE TEMPORARY COVERS OVER OPEN ENDS OF EQUIPMENT AND DUCTWORK DURING CONSTRUCTION.
<br />ACCOMMODATE WORK AS INDICATED IN THE MECHANICAL CONTRACT DOCUMENTS, UNLESS SPECIFICALLY SHOWN ON ARCHITECTURAL
<br />11. DAMPERS SHALL HAVE A MAXIMUM LEAKAGE RATE OF 4 CFM PER SQUARE FOOT AT 1" W.C.
<br />DRAWINGS.
<br />12. PROVIDE EACH ZONE WITH THERMOSTATIC CONTROLS THAT PROVIDE A DEADBAND OF AT LEAST 5 DEGREES FAHRENHEIT IN WHICH
<br />5.
<br />CLEAN THE JOB SITE DAILY AND REMOVE FROM THE PREMISES ANY DIRT AND DEBRIS CAUSE BY THE PERFORMANCE OF THE WORK
<br />HEATING OR COOLING ENERGY IS CAPABLE OF BEING SHUT OFF OR REDUCED TO A MINIMUM, THERMOSTAT SHALL BE CAPABLE OF
<br />INCLUDED IN THIS CONTRACT. BEFORE SUBSTANTIAL COMPLETION, CLEAN EQUIPMENT, FIXTURES, EXPOSED DUCTS, PIPING AND SIMILAR
<br />THERMOSTATIC SETBACK, AUTOMATIC SETBACK AND SHUTDOWN, AND AUTOMATIC START CAPABILITIES PER WASHINGTON STATE ENERGY
<br />ITEMS.
<br />CODE SECTION C403.2.4.2.]
<br />6.
<br />PROVIDE EQUIPMENT THAT FITS INTO THE SPACE ALLOTTED AND ALLOWS ADEQUATE ACCEPTABLE CLEARANCE FOR INSTALLATION,
<br />13. PROVIDE DUCT ACCESS DOORS AT DUCT SMOKE DETECTORS, BACKDRAFT DAMPERS, MOTORIZED CONTROL DAMPERS, FIRE DAMPERS,
<br />REPLACEMENT, SERVICING, AND MAINTENANCE, COORDINATE WITH OTHER TRADES TO ENSURE NO CONFLICT WITH REQUIRED
<br />SMOKE DAMPERS, COMBINATION FIRE/SMOKE DAMPERS, DUCT MOUNTED COILS, DUCT AIRFLOW STATIONS AND LOUVER PLENUMS.
<br />CLEARANCES.
<br />NON-STRUCTURAL MECHANICAL COMPONENTS:
<br />7.
<br />CONTRACTOR SHALL OBTAIN & PAY FOR ALL PERMITS AND CONSTRUCTION FEES, FURNISH FINAL CERTIFICATE TO OWNER SHOWING
<br />COMPLIANCE WITH CODE REQUIREMENTS.
<br />1. HANGERS AND SEISMIC BRACING FOR THE MECHANICAL SYSTEMS SHALL BE DESIGNED AND PROVIDED BY THE MECHANICAL CONTRACTOR.
<br />REFER TO CONTRACTOR SHOP DRAWINGS FOR LOCATIONS OF EQUIPMENT AND HUNG MECHANICAL SYSTEMS. THE MECHANICAL
<br />3.
<br />REFER TO TYPICAL DETAILS PROVIDED IN THIS DRAWING SET FOR DUCTWORK, PIPING, AND EQUIPMENT INSTALLATION, CONTRACTOR IS
<br />CONTRACTOR SHALL COORDINATE THE SUPPORT SYSTEMS AND DESIGN LOADS FOR HUNG MECHANICAL SYSTEMS WITH THE GENERAL
<br />RESPONSIBLE FOR CONFORMANCE WITH DETAILS,
<br />CONTRACTOR AND OTHER TRADES THAT MAY BE IMPACTED.
<br />9.
<br />A SHORT DASH IN A SCHEDULE TABLE CELL INDICATES THAT THE COLUMN HEADING IS NOT USED OR NOT APPLICABLE TO THAT
<br />DEMOLITION;
<br />SCHEDULED ITEM.
<br />1. EXISTING MATERIALS THAT ARE REMOVED SHALL NOT BE REUSED IN NEW SYSTEMS, EXCEPT WHERE INDICATED AS BEING RELOCATED.
<br />10.
<br />PROVIDE COMMISSIONING FOR MECHANICAL SYSTEMS. PROVIDE A COMMISSIONING PLAN OUTLINING ORGANIZATION, SCHEDULE,
<br />NARRATIVE, RESPONSIBILITIES MATRIX, LIST OF EQUIPMENT TO BE TESTED, FUNCTIONS TO BE TESTED, CONDITIONS UNDER WHICH TESTS
<br />2. CONTRACTOR SHALL REMOVE ALL PIPING, DUCTWORK, AND EQUIPMENT INCLUDING ALL ASSOCIATED INSULATION, HANGERS, VALVES,
<br />SHALL BE PERFORMED, AND MEASURABLE CRITERIA FOR PERFORMANCE. COMMISSIONING SHALL BE PER C403 OF THE 2015 WSEC.
<br />PLENUM WALLS, DAMPERS, WIREMOLD, WIRING, CONTROLS, AND APPURTENANCES ASSOCIATED WITH EACH PIECE OF EQUIPMENT,
<br />11.
<br />ALL PIPING & DUCTWORK IN FINISHED ROOMS OR SPACES SHALL BE CONCEALED IN A FURRED CHASE OR ABOVE THE HARD SUSPENDED
<br />3. WHERE EXISTING ITEMS PENETRATE A WALL OR ROOF, CONTRACTOR SHALL PROVIDE INFILL AT (E) PENETRATIONS THROUGH WALL/ROOF
<br />CEILING. COORDINATE WITH ARCHITECTURAL DOCUMENTS FOR FURRING & CHASE LOCATIONS & SIZES.
<br />WITH LIKE MATERIALS. PATCH & REPAIR TO MATCH SURROUNDING SURFACES INCLUDING PAINT.
<br />12.
<br />ALL ELECTRICAL WORK SHALL BE PERFORMED IN ACCORDANCE WITH NFPA 70 STANDARDS AND LOCAL REQUIREMENTS,
<br />4. CONTRACTOR SHALL PROVIDE TEMPORARY SUPPORT OF EXISTING MECHANICAL EQUIPMENT WHERE REQUIRED BY DEMOLITION OR
<br />ALTERATION OF EXISTING STRUCTURE DURING CONSTRUCTION, COORDINATE WITH GC AND PROVIDE NECESSARY SUPPORTS AND
<br />13.
<br />ALL FIELD WIRING SHALL REQUIRE AN ELECTRICAL PERMIT AND SHALL BE PERFORMED BY A LICENSED ELECTRICIAN.
<br />HANGERS TO MAINTAIN INTEGRITY, SAFETY AND PROPER OPERATION OF EXISTING MECHANICAL SYSTEMS.
<br />14.
<br />PROVIDE CLOSEOUT DOCUMENTATION PER WSEC.
<br />5. MAINTAIN AND RESTORE (IF INTERRUPTED) ALL CONDUITS & CONDUCTORS, PIPING, & DUCTWORK PASSING THROUGH RENOVATED AREAS
<br />AND SERVICING UNDISTURBED AREAS.
<br />HVAC/SHEET METAL
<br />6. REMOVE ALL ABANDONED DUCTWORK, PIPING, CONTROLS, WIRING, ETC., WHERE ACCESSIBLE IN RENOVATED AREAS.
<br />1.
<br />THE FIRST FIGURE OF DUCT SIZE CALLOUTS INDICATES DIMENSION OF FACE SHOWN OR INDICATED. DUCT SIZES ARE NET INSIDE
<br />DIMENSIONS. PROVIDE ANY APPLICABLE DUCT LINING AND INSULATION PER THESE PLANS,
<br />7. WHERE CONTROLS ARE DEMOLISHED, REMOVE WIRING BACK TO NEAREST CONTROL PANEL OR JUNCTION BOX. REMOVE ACCESSIBLE
<br />CONDUIT, JUNCTION BOXES, ETC.
<br />2.
<br />DUCT SIZE NOT SHOWN SHALL BE SLED TO VELOCITIES NO GREATER THAN UP STREAM
<br />SECTIONS USING SIMILAR ASPECT RATIOS:
<br />3. OWNER SHALL HAVE FIRST RIGHT OF REFUSAL FOR ALL EQUIPMENT AND COMPONENTS REMOVED DURING.
<br />3.
<br />TOTAL STATIC PRESSURE NOTED IN SCHEDULES SHALL BE ASSUMED TO INCLUDE DUCT SYSTEM, TERMINAL UNITS, FILTERS, COILS, ETC.
<br />9. CONTRACTOR SHALL PERFORM DEMOLITION IN NEAT AND SKILLFUL MANNER SO AS NOT TO DAMAGE OR DEFACE ANY CONSTRUCTION
<br />THAT IS TO REMAIN.
<br />4.
<br />ALL SUPPLY AIR FILTERS SHALL BE MERVm3 RATED;
<br />10. 1T IS THE CONTRACTOR'S RESPONSIBILITY TO INCLUDE ALL COSTS ASSOCIATED WITH NECESSARY DEMOLITION TO ALLOW NEW
<br />5.
<br />DUCTWORK SHALL BE 2.0" PRESSURE CLASS UNLESS OTHERWISE NOTED ON THESE DRAWINGS.
<br />CONSTRUCTION SHOWN IN CONTRACT DOCUMENTS.
<br />1 1
<br />INSTALL PER
<br />!1
<br />CONNECTIONDIFFUSER
<br />SCALE: DIAGRAMMATIC
<br />WELD
<br />23 37 00
<br />I TO BE DETERMINED
<br />OVERHEAD
<br />AT SITE
<br />PIPE LINE
<br />1/2" NON -RETURN
<br />TYPE STATION VALVE
<br />112Hx1/2"x1/2" M.I.
<br />SCREWED TEE
<br />HOSE
<br />CONNECTION
<br />PLUG CHAIN
<br />NIPPLE
<br />ASSEMBLY
<br />(NOT IN USE)
<br />STATION OUTLET
<br />STATION DROP
<br />LINE REGULATOR
<br />DRIP LEG
<br />4°-6" FROM
<br />�V_1/2" M.I. PIPE
<br />FINISHED FLOOR
<br />CAP
<br />WELD
<br />STATION T"Y"PICAL DROP
<br />nGAS
<br />DIAGRAMMATIC
<br />architect
<br />MCGRANAHAN ARCHITECTS
<br />mechanical engineer
<br />BCE ENGINEERS
<br />electrical engineer_
<br />ICE ENGINEERS
<br />project_
<br />SNO-ISLE WELDING SHOP
<br />client_
<br />MUKILTE0 SCHOOL DISTRICT NO.6
<br />Iocation_
<br />EVERETT, WA
<br />issued_
<br />PERMIT 05 APR 21
<br />drawn_
<br />BH
<br />checked_
<br />Sz
<br />ORIGINAL SHEET IS 30" x 42"
<br />copyright 2021
<br />all rights reserved
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