(EXCERPTS FROM BOILER, PRESSURE VESSEL AND PIPING

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INDUSTRY, LABOR & HUMAN RELATIONS 49ILHR 41-42 Appendix BILHR 41-42APPENDIX B(EXCERPTS FROM BOILER, PRESSURE VESSEL AND PIPING CODES ANDSTANDARDS )Excerpts from the following boiler, pressure vessel and piping codes and standards arereproduced here strictly for reference : ASME Sections I, IV and VIII and ANSI/ASME B31 .1 .This informarion has been included to provide a general idea as to the requirements of thesecodes and standards . Users of this information must be cautioned that these excerpts do notprovide complete guidelines for inspection, installation, operation and manufacturing .Only portions of each code and standard thought to be frequently used by persons nothaving direct access to the complete documents have been included . It must be noted thatthese codes and standards change on a periodic basis as indicated in s . ILHR 41 .10 . Thosewho are bound by the rules of ch . ILHR 41 must avail themselves of the applicable codesection or standards listed in s . ILHR 41 a 10 . Refer to ch . ILHR 42 for rules applying torepairs, alterations, and miscellaneous requirements .Register, May, 1994, No . 461

50 WISCONSIN ADMINISTRATIVE CODEILHR 41-42 Appendix BEXCERPTS FROM :ASME BOILER AND PRESSURE VESSEL CODESECTION IPOWER BOILERS1992 EDITIO NRegister, May, 1994, No, . 461

INDUSTRY, LABOR . & HUMAN RELATIONS 51ILHR 41-42 Appendix BPREAMBL EThis Code covers rules for construction ofpower boilers, electric boilers, miniatureboilers, and high-temperature water boilersto be used in stationary service and includesthose power boilers used in locomotive,portable, and traction service . Reference toa paragraph includes all the subparagraphsand subdivisions under that paragraph .The Code does not contain rules to coverall details of design and construction .Where complete details are not given, it isintended that the manufacturer, subject tothe acceptance of the Authorized Inspector,shall provide details of design andconstruction which will be as safe asotherwise provided by the rules in the Code .The scope of jurisdiction of Section Iapplies to the boiler proper and to the boilerexternal piping .Superheaters, economizers, and otherpressure parts connected directly to theboiler without intervening valves shall beconsidered as parts of the boiler proper, andtheir construction shall conform to Section Irules .Boiler external piping shall be consideredas that piping which begins where the boilerproper terminates at :(a) the first circumferential joint forwelding end connections ; o r(b) the face of the first flange inbolted flanged connections ; or(c) The first threaded joint in thattype of connection; andWhich extends up to and including thevalve or valves required by this Code .ASME code Certification (including DataForms and Code Symbol Stamping), and/orinspection by the Authorized Inspector,when required by this Code, is required forthe boiler proper and the boiler externalPipmgConstruction rules for materials, design,fabrication, installation, and testing of theboiler external piping are contained inASME B31 .1, Power Piping, Piping beyondthe valve or valves required by Section I isnot within the scope of Section I, and it isnot the intent that the Code Symbol Stampbe applied to such piping or any otherpiping .The material for forced-circulation boilers,boilers with no fixed steam and water line,and high-temperature water boilers shallconform to the requirements of the Code .All other requirements shall also be metexcept where they relate to special featuresof construction made necessary in boiler ofthese types, and to accessories that aremanifestly not needed or used in connectionwith such boilers, such as water gages andwater columns .Reheaters receiving steam which haspassed through part of a turbine or otherprime mover and separately fired steamsuperheaters which are not integral with theboiler are considered fired pressure vesselsand their construction shall comply withCode requirements for superheaters,including safety devices . Piping between thereheater connections and the turbine or othe rRegister, May, 1994, No, . 461

52 WISCONSIN ADMINISTRATIVE CODEILHR 41-42 Appendix Bprime mover is not within the scope of theCode.A pressure vessel in which steam isgenerated by the application of heat resultingfrom the combustion of fuel (solid, liquid,or gaseous) shall be classed as a fired steamboiler .Unfired pressure vessel in which steam isgenerated shall be classed as unfired steamboiler with the following exceptions :(a) vessels known as evaporators or heatexchanges ;(b) vessels in which steam is generated bythe use of heat resulting from operation of aprocessing system containing a number ofpressure vessels such as used in themanufacture of chemical and petroleumproducts .Unfired steam boilers shall be constructedunder the provisions of Section I or SectionVIII .Expansion tanks required in connectionwith high-temperature water boilers shall beconstructed to the requirements of Section Ior Section VIII .A pressure vessel in which an organic fluidis vaporized by the application of heatresulting from the combustion of fuel (solid,liquid, or gaseous) shall be constructedunder the provisions of Section I . Vessels inwhich vapor is generated incidental to theoperation of a processing system, containinga number of pressure vessels such as used inchemical and petroleum manufacture, arenot covered by the rules of Section LRegister, May, 1994, No. 461

INDUSTRY, LABOR & HUMAN RELATIONS 53ILHR 41-42 Appendix BPART PGGENERAL REQUIREMENTS FOR ALLMETHODS OF CONSTRUCTIONGENERALPG-1 SCOPE(b) No steam is generated within theThe requirements of Part PG apply topower boilers and high pressure, . hightemperature water boilers and to parts andappurtenances thereto and shall be used inconjunction with the specific requirements inthe applicable Parts of this Section thatpertain to the methods of construction used .PG-2 SERVICE LIMITATION SPG-2 .1 The rules of this Section areapplicable to the following services :(a) boilers in which steam or other vapor isgenerated at a pressure of more than 15psig ;coil .(c) Tubing outside diameter does notexceed 1 in .(d) Pipe size does not exceed NPS3/4 .(e) Nominal water capacity does notexceed 6 gal .(f) Water temperature does notexceed 350 F .(g) Adequate safety relief valves andcontrols are provided .(b) high-temperature water boilers intendedfor operation at pressures exceeding 160psig and/or temperatures exceeding. 250 F .PG-2 .2 For services below those specifiedin PG-2 .1 it is intended that rules of SectionIV apply ; however, boilers for such servicesmay be constructed and stamped inaccordance with . this Section provided allapplicable requirements are met .PG-2 .3 Coil-type hot water boilers wherethe water can flash into steam when releaseddirectly to the atmosphere through amanually operated nozzle may be exemptedfrom the rules of this Section provided thefollowing conditions are met .(a) There is no drum header, or othersteam space.Register, May, 1994, No 461

54WISCONSIN ADMINISTRATIVE COD EILHR 41-42 Appendix BVENTS ANDINSTRUMENTATIO NSINGLE INSTALLATIO NPG 71-- PG 58 3 .1PG-583 2MULTIPLE INSTALLATIONCOMMON HEADERFLEVEL INDICATORSPG-6 0DRAIN -- STEAM DRUMSURFACE BLOWPG 58 .3 .7 CONTINUOUS--- BLO W-DQ- -- CHEMICAL FEEDDRUM SAMPLECONTROL DEVIC EPG-60VENTINLET HEADEROf used )F'DRAIN rSOOT BLOWERS PG-685SU ERNEATE p - -- -- SINGLE INSTALLATIONMAiN STEA ML.PG-684 HOT REHEAT " - ---- ---- DRAIN REhEATERP(, ;8 3 1f-t SOOT BLOWERS PG-68 .5-v- MULTfPL ELlNSTA LLATIO NPG-58 3 .2 -- DRAIN COMMONDRAINHEA D E RVENTPG -68 4COLO REHEAT::D:TR A IN - - - SINGLE BOILERPG-58 .3 7 EO Q ERf - -CG--{/b-- -- - SINGLE BOILER BOILER NO tTWO OR MORE BOILERSBOIlERN02FEOFROMACOMMO NU, S---d4-- -1/F- SOURC E WATER DRUMPG-58 3:.6BLOW-OFFSINGLE AND MULTIPLEINSTAL.LATIONS rnREGULATING vALVE 5in si ya d -BOILERNO r -D ---- {BOILER NO 2TWOORMORE BOILERSFEDFROM 4 A COMMON SOURC ELLORAINPG-58,3 7ADMINISTRATIVE JURISDICTION & TECHNICAL RESPONSIBILITYBoiler Proper - The ASME Boiler and Pressure Vessel Code (ASME BPVC) has total administrative jurisdiction and technicalresponsibility (refer to Section I Preamble) . Boiler External Piping and Joint - The ASME BPVC has total administrative jurisdiction (mandatory certificationby Code Symbol stamping. ASME Data Forms, and Authorized Inspection) of Bo iler External Piping and Joint.The ASME Section Commi ttee B31 .1 has been assigned technical responsibility.O Non-Boiler External Piping and Joint - Not Section I jurisdiction (see applicable ASME B31 Code) .FIG. PG-58 .3.1 CODE JURISDICITONAL LINIITS FOR PIP ING - DRUM TYPE BOILERSRegister, May, 1994, No, . 461

INDUSTRY, LABOR & HUMAN RELATIONS 55ILHR 41-42 Appendix BTurbine valve orcode stop valvePG5a31/SuperheaterTurbine- - To equipmen t P -- -TReheate r -----Convectionand radiantsectionI---i--1 (Start-up syste mmay vary to suitboi ler manufacturerCondenserEconomizerr , . ---Boiler feed pump - 4 -- ;-'W - - - ';--LADMINSTRAIVEJURISDCTION&TECHNIALRESPONSIBLT Y- Boiler Proper - The ASME Boiler and Pressure Vessel Code (ASME BPVC) has total administrative jurisdiction andtechnical responsibility (refer to Section I Preamble) . - Boiler External Piping and Joint - The ASME BPVC has total administrative jurisdiction (mandatory certificationby Code Symbol stamping, ASME Data Forms, and Authorized Inspection) of Boiler External Piping and Joint .The ASME Section Committee B31 .1 has been assigned technical responsibility .O-Non-Boiler External Piping and Joint - Not Section I jurisdiction ((see applicable ASME B31 Code) .FIG. PG-58.3 .2 CODE JURISDICTIONAL LIMITS FOR PIPING - FORCED-FLOW STEAM GENERATOR WITH NO FIXEDSTEAM OR WATERLINERegister, May, 1994, No. 461

WISCONSIN ADMINISTRATIVE COD E56ILHR 41-42 Appendix BBOILER EXTERNAL PIPINGAND BOILER PROPERCONNECTIONSPG-58 OUTLETS AND EXTERNALPIPINGPG-58 .1 General . The rules of thissubparagraph apply to the boiler externalpiping as defined in the Preamble .Boiler External PipingPG-58.2Connections to Boilers . All boiler enternalpiping connected to a boiler for any purposeshall be attached to one of the type of jointslisted PG-59 .1 .1 .1, PG-59 .1 .1 .2, and PG59.1 .1 .3 .PG-58.3 Boiler External Piping . Thefollowing defines the Code JurisdictionalLimits of the boiler external piping systems,including general requirements, valves, andinspection . The limits are also shown inFig. PG-58 .3 .1 and Fig . PG-58 .3 .2 . Thematerials, design, fabrication, installation,and testing shall be in accordance withASME B31 .1, Power Piping .PG-58.3.1 The steam piping connected tothe boiler drum or to the superheater outletheader shall extend up to and including thefirst stop valve in each connection, except asrequired by PG-58 .3.2. In the case of asingle boiler and prime mover installation,the stop vaive required herein may beomitted provided the prime mover throttlevalve is equipped with an indicator to showwhether the valve is open or closed and isdesigned to withstand the requiredhydrostatic pressure test of the boiler .Register, . May, 1994, No., 461PG-58.3.2 When two or more boilers areconnected to a common steam header, theconnection from each boiler having amanhole opening shall be fitted with twostop valves having an ample free-blow drainbetween them . The boiler external pipingincludes all piping from the boiler proper upto and including the second stop valve andthe free-blow drain valve .PG-58 .3.3 The feedwater piping for allboilers, except high-temperature waterboilers and forced-flow steam generatorscomplying with PG-53 .3.5, shall extendthrough the required stop valve and up toand including the check valve except asrequired by PG-58 .3 .4 . On a single boilerturbine unit installation the boiler feedshutoff valve may be located upstream fromthe boiler feed check valve .If a feedwater heater or heaters meeting therequirements of Part PFH are installedbetween the required stop valve and theboiler, and are fitted with isolation andbypass valves, provisions must be made toprevent the feedwater pressure fromexceeding the maximum allowable workingpressure of the piping or feedwater heater,whichever is less . Control and interlocksystems are permitted in order to preventoverpressure oPG-58 .3 .4 When two or more boilers arecd iOiii a Vviiuiivn source, tie yipiiig Siaiibe up to and including a globe or regulatingvalve located between the check valverequired in PG-58 .3 .3 and the source ofsupply . If the regulating valve is equippedwith an isolation valve and a bypass valve,the piping shall be up to and including boththe isolation valve downstream from th e

INDUSTRY, LABOR & HUMAN RELATIONS 57ILHR 41-42 Appendix Bregulating valve and the shutoff valve in thebypass .PG-58.3.6 The blowoff piping for allboilers, except forced-flow steam generatorswith no fixed steam and waterline, hightemperature water boilers, and those usedfor traction and/or portable purposes, whenthe maximum allowable working pressureexceeds 100 psi shall extend through andPG-59.1 .1 Outlets of a boiler to whichpiping is to be attached for any purpose, andwhich piping comes within the Coderequirements, shall meet the requirements ofPG-39 and shall be :PG-59.1.1 .1 A tapped opening .PG-59.1 .1.2 Bolted flanged jointsincluding those of the Van Stone type .111llUding the second vaive . aie vlowofapiping for all traction and/or portable boilersand for forced circulation and electricboilers having a normal water content notexceeding 100 gal are required to extendthrough only one valve .PG-58.3 .7 The miscellaneous piping shallinclude the piping for such items as drains,vents, surface-blow-off, steam and waterpiping for water columns, gage glasses andpressure gages, and the recirculation returnline for a high-temperature water boiler .When a drain is not intended for blowoffpurposes (when the boiler is under pressure)a single valve is acceptable, otherwise twovalves in series are required except aspermitted by PG-58 .3 .6.PG-58.3.8 Welded piping in PG-58 .3.1,PG-58 .3 .2, PG-58.3 .3, PG-58 .3 .4, PG58.3 .5, PG-58 .3 .6, and PG-58 .3 .7 is alsosubject to the requirements of PG-104 forproper Code certification.PG-59APPLICATIONREQUIREMENTS FOR THE BOILERPROPERPG-59.1 Common to Steam, Feedwater,Blowoff, and Drain SystemsPG-59.1.1 .3 Welding ends of the butt orsocket welding type .PG-59.1 .1.4 Piping within the boilerproper may be expanded into grooved holes,seal welded if desired . Blowoff piping offiretube boilers shall be attached bythreading into a tapped opening with athreaded fitting or valve at the other end ifexposed to products of combustion, or byPG-59.1 .1 .1 or PG-59.1 .1 .2 if not soexposed (see PFT-49) :PG-59.1.2 Steam Mains . Provisionsshall be made for the expansion andcontraction of steam mains connected toboilers, by providing substantial anchorageat suitable points, so that there shall be noundue strain transmitted to the boiler.Steam reservoirs shall be used on steammains when heavy pulsations of the steamcurrents cause vibration of the boiler shellplates .PG-59 .1 .3 Figure PG-59 .1 illustrates atypical form of connection for use on boilershells for passing through piping such asfeed, surface blowoff connections, etc ., andwhich permits the pipes' being threaded insolid from both sides in addition to thereinforcing of the opening of the shell . TheRegister, May, 1994, No . 461

58WISCONSIN ADMINISTRATIVE CODEILHR 41-42 Appendix B . pipes shall be attached as provided in PG59.1 .1 .In these and other types of boilers whereboth internal and external pipes making acontinuous passage are employed, the boilerbushing or its equivalent shall be used .PG-59.2 Requirements for FeedwaterConnections . The feedwater shall beintroduced into a boiler in such a mannerPG-59.3 .2 A surface blowoff connectionshall not exceed NPS 21/2 , and the internalpipe and the terminal connection for theexternal pipe, when used, shall form acontinuous passage, but with clearancebetween their ends and arranged so that theremoval of either will not disturb the other .A properly designed steel bushing, similar toor the equivalent of those shown in Fig . PG59 .1, or a flanged connection shall be used .uiai, uic vva tci will i30L ue uiNciuu geu uuccu yagainst surfaces exposed to gases of hightemperature or to direct radiation from thefire. For pressures of 400 psi or over, thefeedwater inlet through the drum shall befitted with shields, sleeves, or other suitablemeans to reduce the effects of temperaturedifferentials in the shell or head .Feedwater, other than condensate returns asprovided for in PG-59 .3.6, shall not beintroduced through the blowoff .PG-59 .3 Requirements for BlowoffsPG-59.3.1 A Blowoff as required hereinis defined as a pipe connection providedwith valves located in the external pipingthrough which the water in the boiler maybe blown out under pressure, exceptingdrains such as are used on water columns,gage glasses, or piping to feedwaterregulators, etc ., used for the purpose ofdetermining the operating condition of suchequipment . Piping connections usedpriniarily for contiriuous operation, such asdeconcentrators on continuous blowdownsystems, are not classed as blowoffs but thepipe connections and all fittings up to andincluding the first shutoff valve shall beequal at least to the pressure requirementsfor the lowest set pressure of any safetyvalve on the boiler drum and with thecorresponding saturated-steam temperature .Register, May, 1994, No . 461PG-59.3.3 Each boiler except forced-flowsteam generators with no fixed steam andwaterline and high-temperature water boilersshall have a bottom blowoff outlet in directconnection with the lowest water spacepracticable for external piping conforming toPG-58 .3 .6.PG-59.3 .4 All waterwalls and waterscreens which do not drain back into theboiler, and all integral economizers, shall beequipped with outlet connections for ablowoff or drain line and conform to therequirements of PG-58 .3 .6 or PG-58.3 .7 .PG-59 .3.5 Except as permitted forminiature boilers in Part PMB, the minimumsize of blowoff connections shall be NPS 1,and the maximum size shall be NPS 21/2,except that for boilers with 100 sq ft ofheating surface or less, the minimum size ofblowoff connections may be NPS 3/4 .PG-59.3.6 Condensate return connectionsof the same size or larger than the sizeherein specified may be used, and theblowoff may be connected to them . In suchcase the blowoff shall be so located that theconnection may be completely drained .PG-59.3.7 A bottom blowoff pipe whenexposed to direct furnace heat shall b e

INDUSTRY, LABOR & HUMAN RELATIONS 59ILHR 41-42 Appendix Bprotected by firebrick or other heat resistingmaterial which is so arranged that the pipemay be inspected.The following requirements apply to the useof valves and fittings in the boiler proper .PG-59.5.1 Steam Stop ValvesPG-59.3.8 An opening in the boiler settingfor a blowoff pipe shall be arranged toprovide free expansion and contraction .PG-59.4 Requirements for DrainsYG-59 .4.1.1 Each superheater shall beequipped with at least one drain connectionso located as to most effectively provide forthe proper operation of the apparatus .PG-59.4 .1.2 Each high-temperature waterboiler shall have a bottom drain connectionof at least NPS 1 in direct connection withthe lowest water space practical for externalpiping conforming to PG-58 .3 .7 .PG-59 .5FIttings.Requirements for Valves andPG-59 .5.1 .1 If a shutoff valve is usedbetween the boiler and its superheater, thesafety valve capacity on the boiler shallcomply with the requirements of PG-67 .2and PG-70, except as provided for in PG59.5 .1 .2, no credit being taicen tor the safetyvalve on the superheater, and thesuperheater must be equipped with safetyvalve capacity as required by PG-68 . Astop valve is not required at the inlet or theoutlet of a reheater or separately firedsuperheater .PG-59.5.1 .2 When stop valves are installedin the water-steam flow path between anytwo sections of a forced-flow steamgenerator with no fixed steam and waterline,the safety valves shall satisfy therequirements of PG-67 .4 .4.FIG. PG-59 .1 TYPICAL BOILER BUSH INGSRegister, May, 1994, No. 461

60 WISCONSIN ADMINISTRATIVE CODEILHR 41-42 Appendix BDESIGN AND APPLICATION Tubular water glasses must be equippedwith a protecting shield.PG-60 REQUIREMENTS FORMISCELLANEOUS PIPE,VALVES, AND FITTINGSPiping referred to in this paragraph shall bedesigned in accordance with the applicablerequirements of ASME B31 .1 .PG-60 .1 Water Level IndicatorsPG-60.1 .2 Forced-flow steam generatorswith no fixed steam and waterline and thehigh-temperature water boiler of the forcedcirculation type require no water gage glass .PG-60.1.4 Boilers of the horizontalfiretube type shall be so set that when thewater is at the lowest reading in the watergage glass there shall be at least 3 in . ofwater over the highest point of the tubes,flues, or crown sheets .PG-60.1.5 Boilers of locomotives shallhave at least one water glass provided withtop and bottom shutoff cocks and lamp .The lowest reading of water glass shall notbe less than 2 in . above the highest point ofcrown sheet on boilers over 36 in . indiameter and under nor less less than 3 in .for boilers over 36 in . in diameter . Theseare minimum dimensions, and on largelocomotives and those operating on steepgrades, the height should be increased, ifnecessary, to compensate for change ofwater level on descending grades .The bottom mounting for water glass andfor water column if used must extend notless than 11h in . inside the boiler andbeyond any obstacle immediately above it,and the passage therein must be straight andhorizontal .Register, May, 1994, No. 461PG-60 .1 .6 All connections on the gageglass shall be not less than 1/2 in . pipe size .Each water gage glass shall be fitted with adrain cock or valve having an unrestricteddrain opening of not less than 1/4 in .diameter to facilitate cleaning . When theboiler operating pressure exceeds 100 psi theglass shall be furnished with a connection toinstall a valved drain to the ash pit or othersafe discharge point.Each water gage glass shall be equippedwith a top and a bottom shutoff valve ofsuch through-flow construction as to preventstoppage by deposits of sediments . If thelowest valve is more than 7 ft above thefloor or platform from which it is operated,the operating mechanism shall indicate by itsposition whether the valve is open or closed .The pressure-temperature rating shall be atleast equal to that of the lowest set pressureof any safety valve on the boiler drum andthe corresponding saturated-steamtemperature .PG-60 .2 Water Column sPG-60.2.1 The water column shall be somounted that it will maintain its correctposition relative to the norman waterlineunder operating conditions .PG-60.2.2 The minimum size of pipesconnecting the water column to a boiler shallbe 1 in . For pressure of 400 psi or over,lower water column connections to drumsshall be provided with shields, sleeves, orother suitable means to reduce the effect oftemperature differentials in the shells orheads . Water glass fittings may beconnected directly to the boiler .

INDUSTRY, LABOR & HUMAN RELATIONS 61ILHR 41-42 Appendix BPG-60 .2.3 The steam and waterconnection to a water column or a watergage glass shall be such that they are readilyaccessible for internal inspection andcleaning . Some acceptable methods ofmeeting this requirement are by providing across or fitting with a back outlet at eachright-angle turn to permit inspection andcleaning in both directions, or by using pipebends or fittings of a type which does notleave and internal shoulder or pocket in thepipe connection and with a radius ofcurvature which will permit the passage of arotary cleaner . Screwed plug closures usingthreaded connections as allowed by PG39.5 .3 are acceptable means of access forthis inspection and cleaning . For boilerswith all drum safety valves set at or above400 psig, socket-welded plugs may be usedfor this purpose in lieu of screwed plugs .The water column shall be fi tted with aconnection for a drain cock or drain valve toinstall a pipe of at least 3/4 in . pipe size tothe ash pit or other safe point of discharge .If the water connection to the water columnhas a rising bend or pocket which cannot bedrained by means of the water-column drain,an additional drain shall be placed on thisconnection in order that it may be blown off'to clear any sediment from the pipe .PG-60.2 .4 The design and material of awater column shall comply with therequirements of PG-42 . Water column madeof cast iron in accordance with SA-278 maybe used for maximum boiler pressures notexceeding 250 psi . Water columns made ofductile iron in accordance with SA-395 maybe used for maximum boiler pressures notexceeding 350 psi . For higher pressures,steel construction shall be used .PG-60 .2.5 Shutoff valves shall not beused in the pipe connections between aboiler and a water column or between aboiler and the shutoff valves required for thegage glass (PG-60 .1 .6), unless they areeither out-side-screw-and-yoke or leverlifting type gate valves or stopcocks withlever permanently fastened thereto andmarked in line with their passage, or of suchother through-flow construction as toprevent stoppage by deposits of sediment,and to indicate by the position of theoperating mechanism whether they are inopen or closed position, and such valves orcocks shall be locked or sealed open . Wherestopcocks are used they shall be of a typewith the plug held in place by a guard orgland.The lock or seal open requirement may bewaived if the following additional conditionsare met .(1) MAWP shall not exceed 250 psig .(2) The boiler shall not be hand fired orfired with solid fuel not in suspension .(3) Interlocks between the valve and theburner control system shall stop fuel supplyand prevent firing whenever the valvebetween the drum and the water column isnot in the fully open position .(4) Provision shall be made in the valvebody to permit cleaning and rodding ofhorizontal and vertical legs of attached pipewhen the boiler is out of service .(5) The minimum valve size snall be NPS1.(6) The valve shall indicate by its positionwhether it is open or closed .PG-60 .2.6 No outlet connections, except forcontrol devises (such as damper regulatorsand feedwater regulators), drains, steamgages, or apparatus of such form as does no tRegister, May, 1994, No . 461

WISCONSIN ADMINISTRATIVE COD E62ILHR 41-42 Appendix Bpermit the escape of an appreciable amountof steam or water therefrom shall be placedon the pipes connecting a water column orgage glass to a boiler .-----------;a- . --- - 'mPG-60 .3 Gage Glass ConnectionsPG-60.3 .1 Gage glasses that are requiredby PG-60 .1 shall be connected directly tothe shell or drum of the boiler or to anintarvenng Water C nhlmn ,PG-60.3 .2 The lower edge of the steamconnection to a water column of gage glassin the boiler shall not be below the highestvisible water level in the water gage glass .There shall be no sag or offset in the pipingwhich will permit the accumulation of water .PG-60.3.3 The upper edge of the waterconnection to a water column or gage glassand the boiler shall not be above the lowestvisible water level in the gage glass . Nopart of this pipe connection shall be abovethe point of connection at the water column .PG-60.3 .4 An acceptable arrangement isshown in Fig . PG-60 .PG-60.4 Gage Cocks . Not requiredPG-60.5 Water Fronts . Each boiler fittedwith a water jacketed boiler-furnace mouthprotector, or similar appliance having valveson theVll L11Nr ir ca nnnnantin(rF 11JVJVVllilV\rLlll5ltlnmL11V111to theLV L11VhnilarVV11VLshall have these valves locked or sealedopen. Such valves, when used, shall be ofthe straightway type . -Register, May, 1994, No,. 461Water SteaFIG . PG-60 TYPICAL ARRANGEMENT OFSTEAM AND WATER CONNECTIONS FOR AWATER COLUM NPG-60 .6 Pressure Gage sPG-60.6.1 Each boiler shall have apressure gage so located that it is easilyreadable . The pressure gage shall beinstalled so that it shall at all times indicatethe pressure in the boiler . Each steam boilershall have the pressure gage connected to thesteam space or to the water column or itssteam connection . A valve or cock shall beplaced in the gage connection adjacent to thegage. An additional valve or cock may belocated near the boiler providing it is lockedor sealed in the open position . No othershutoff' valves shall be located between thegage and the boiler . The pipe connectionshall be of ample size and arranged so that itmay be cleared by blowing out . For a steamboiler the gage or connection shall contain asyphon or equivalent device which willdevelop and maintain a water seal that willprevent steam from entering the gage tube .Pressure gage connections shall be suitable .

INDUSTRY, LABOR & HUMAN RELATIONS 63ILHR 41-42 Appendix Bfor the maximum allowable workingpressure and temperature, but if thetemperature exceeds 406 F, brass or copperpipe or tubing shall not be used . Theconnections to the boiler, except the syphon,if used, shall not be less than 1/4 in .standard pipe size but where steel orwrought iron pipe or tubing is used theyshall not be less than 1/2 in . inside diameter .The minimum size of a syphon, if used,shaii be 1/4 in. inside diameter. The dial ofthe pressure gage shall be graduated toapproximately double the pressure at whichthe safety valve is set, but in no case to lessthan 1 1/2 times this pressure .PG-60 .6.2 Each forced-flow steamgenerator with no fixed steam and waterlineshall be equipped with pressure gages o r other pressure measuring devices located asfollows:PG-60.6.2.1 At the boiler or superheateroutlet (following the last section whichinvolves absorption of heat), andPG-60 .6.2 .2 At the boiler or economizerinlet (preceding any section which involvesabsorption of heat), andPG-60.6.2.3 Upstream of any shutoffvalve w

boiler external piping are contained in ASME B31 .1, Power Piping, Piping beyond the valve or valves required by Section I is not within the scope of Section I, and it is not the intent that the Code Symbol Stamp be applied to such piping or any other pipi

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A Lochinvar Crest series condensing boiler, model FBN2001 was installed to replace "Boiler 2" in January 2019. Boiler 2 was an AERCO Benchmark 2.0, serial number G-08-0799. New Boiler Information-SUN-224 Boiler Identification: Boiler 2 Location: Boiler Room Boiler Make/Model