EXCERPTS FROM: ASME BOILER AND PRESSURE VESSEL CODE
EXCERPTS FROM: ASME BOILER AND PRESSURE VESSEL CODESECTION IV - HEATING BOILERS2010 EDITIONINTRODUCTIONThe rules of this Section of the Code coverminimum construction requirements for thedesign, fabrication, installation, andinspection of steam heating, hot waterheating, hot water supply boilers that aredirectly fired with oil, gas, electricity, coal,or other solid or liquid fuels, and foroperation at or below the pressure andtemperature limits set forth in thisdocument. Similar rules for potable waterheaters are also included.For Section IV application, the boilerproper or other vessels terminate at thesupply and return connections to the systemor the supply and feedwater connections of ahot water supply boiler. These connectionsmay be any of the following:(a) the first circumferential joint forwelding end connections(b) the face of the first flange in boltedflanged connections(c) the first threaded joint in that type ofconnectionIncluded within the scope of the boiler arepressure-retaining covers for inspectionopenings, such as manhole covers, handholdcovers, and plugs; and headers required toconnect individual coils, tubes, or castsections within a boiler.The rules are divided into four majorParts: Part HG, applying to all materials ofconstruction except as provided for in PartHLW; Part HF, applying to assembliesfabricated of wrought material, except asprovided for in Part HLW; Part HC,applying to cast iron assemblies; Part HA,applying to boilers constructed of castaluminum; and Part HLW, applying topotable water heaters. Part HF is furthersubdivided into Subpart HW, containingrules for welded construction, and SubpartHB, containing rules for brazed construction.The Parts and Subparts of this Section aredivided into Articles. Each Article is given anumber and a title, as for example, Part HG,Article 3, Design. Articles are divided intoparagraphs that are given a three-digit number,the first of which corresponds to the Articlenumber. Thus, under Article 3 of Part HG,paragraph HG-307 will be found. Paragraphs arefurther subdivided into subparagraphs. Majorsubdivisions of paragraphs are designated bythree- or four-digit numbers followed by adecimal point and a digit or digits. Wherenecessary, further subdivisions are representedby letters and then by numbers in parentheses.Minor subdivisions of the paragraphs are alsorepresented by letters. A reference to one ofthese paragraphs in the text of the Sectionincludes all of the applicable rules in thatparagraph. Thus, reference to HG-307 includesall the rules in HG-307.1 through HG-307.4.This Section does not contain rules to cover allpossible details of design and construction.Where complete details are not given, it isintended that the manufacturer, subject to theacceptance of the Authorized Inspector, shallprovide details of design and construction thatwill be as safe as otherwise required by theserules.When the strength of any part cannot becomputed with a satisfactory assurance of safety,these rules provide procedures for establishingits maximum allowable workingpressure.ARTICLE 1SCOPE AND SERVICE RESTRICTIONSHG-100 SCOPE(a) The rules of Part HG apply to steam heatingboilers, hot water heating boilers, hot watersupply boilers, and to appurtenances thereto.44
They shall be used in conjunction with thespecific requirements in Part HF, Boilers ofWrought Materials, Part HC, Cast IronBoilers, and Part HA, Cast AluminumBoilers, whichever is applicable. Theforeword provides the basis for these rules.Part HG is not intended to apply to potablewater heaters except as provided for in PartHLW.(b) This Part contains mandatoryrequirements, specific prohibitions, andnonmandatory guidance for materials,designs, fabrication, examination,inspection, testing, certification, andpressure relief.(c) Laws or regulations issued by amunicipality, state, provincial, federal, orother enforcement or regulatory body havingjurisdiction at the location of an installation,establish the mandatory applicability ofthese rules, in whole or in part.HG-101 SERVICE RESTRICTIONSHG-101.1 Service Restrictions. The rulesof this Section are restricted to the followingservices:(a) steam boilers for operation at pressuresnot exceeding 15 psi (100 kPa)(b) hot water heating boilers and hot watersupply boilers for operating at pressures notexceeding 160 psi (1 100 kPa) and/ortemperatures not exceeding 250 F (120 C),at or near the boiler outlet, except that whensome of the wrought materials permitted byPart HF are used, a lower temperature isspecifiedHG-101.2 Services in Excess of ThoseCovered by This Section. For servicesexceeding the limits specified in HG-101.l,the rules of Section I shall apply.HG-102 UNITSEither U.S. Customary, SI, or any localcustomary units may be used to demonstratecompliance with all requirements of thisedition (e.g., materials, design, fabrication,examination, inspection, testing, certification,and overpressure protection).In general, it is expected that a single system ofunits shall be used for all aspects of designexcept where unfeasible or impractical. Whencomponents are manufactured at differentlocations where local customary units aredifferent than those used for the general design,the local units may be used for the design anddocumentation of that component. Similarly, forproprietary components or those uniquelyassociated with a system of units different thanthat used for the general design, the alternateunits may be used for the design anddocumentation of that component.For any single equation, all variables shall beexpressed in a single system of units. Whenseparate equations are provided for U.S.Customary and SI units, those equations must beexecuted using variables in the units associatedwith the specific equation. Data expressed inother units shall be converted to U.S. Customaryor SI units for use in these equations. The resultobtained from execution of these equations maybe converted to other units.Production, measurement and test equipment,drawings, welding procedure specifications,welding procedure and performancequalifications, and other fabrication documentsmay be in U.S. Customary, SI, or localcustomary units in accordance with thefabricator’s practice. When values shown incalculations and analysis, fabrication documents,or measurement and test equipment are indifferent units, any conversions necessary forverification of Code compliance and to ensurethat dimensional consistency is maintained shallbe in accordance with the following:(a) Conversion factors shall be accurate to atleast four significant figures.(b) The results of conversions of units shall beexpressed to a minimum of three significantfigures.Conversion of units, using the precisionspecified above shall be performed to assure thatdimensional consistency is maintained.45
Conversion factors between U.S. Customaryand SI units may be found in theNonmandatory Appendix M, Guidance forthe Use of U.S. Customary and SI Units inthe ASME Boiler and Pressure Vessel Code.Whenever local customary units are used theManufacturer shall provide the source of theconversion factors, which shall be subject toverification and acceptance by theAuthorized Inspector.Material that has been manufactured andcertified to either the U.S. Customary or SImaterial specification (e.g., SA-516M) maybe used regardless of the unit system used indesign. Standard fittings (e.g., flanges,elbows, etc.) that have been certified toeither U.S. Customary units or SI units maybe used regardless of the unit system used indesign.All entries on a Manufacturer’s DataReport and data for Code requirednameplate marking shall be in unitsconsistent with the fabrication drawings forthe component using U.S. Customary, SI, orlocal customary units. It is acceptable toshow alternate units parenthetically. Usersof this Code are cautioned that the receivingJurisdiction should be contacted to ensurethe units are acceptable.ARTICLE 2MATERIAL REQUIREMENTSHG-200 GENERAL MATERIALREQUIREMENTSHG-200.1 Materials Subject to PressureStress. Material subject to stress due topressure shall conform to one of thespecifications given in Section II and shallbe limited to those that are permitted in HF200 for boilers of wrought materials andHC-200 for cast iron boilers.HG-200.2 Internal Parts Subject toDeterioration. Materials shall not be usedfor internal parts that are liable to fail due todeterioration when subjected to saturatedsteam temperatures at or below the maximumallowable working pressure.HG-200.3 Materials Not Found in SectionII. Material not covered by specifications inSection II shall not be used unless authorizationto use the material is granted by the Boiler andPressure Vessel Committee on the basis of datasubmitted to the Committee in accordance withAppendix A.HG-200.4 Materials Use Not Limited bySpecification Title. The title or scope paragraphof a material specification in Section II withrespect to product form or service shall not limitthe use of a material, provided the material issuitable for the application and its use ispermitted by the rules of this Section.HG-200.5 Materials Use Not Limited byMethod of Production. Materials covered byspecifications in Section II are not restricted as tothe method of production unless so stated in theSpecification, and as long as the productcomplies with the requirements of theSpecification.HG-200.6 Materials With ThicknessesExceeding Specification Limits. Materialshaving thicknesses outside of the limits given inthe title or scope clause of a specification inSection II may be used in construction, providedthey comply with the other requirements of theSpecification and with all thickness requirementsof this Code.HG-200.7 Nonpressure Part Materials.Material for nonpressure parts, such as skirts,supports, baffles, lugs, clips, and extended heattransfer surfaces, need not conform to thespecifications for the material to which they areattached or to a material specification permittedin HF-200 or HC-200; but, if welded, they shallbe of weldable quality. The allowable stressvalue shall not exceed 80% of the maximumallowable stress permitted for similar material inTables HF-300.1 and HF-300.2. Satisfactoryperformance of a specimen in such service shallnot make the material acceptable for use inpressure parts of a vessel.46
HG-201 SPECIFIC MATERIALREQUIREMENTSSpecific material requirements forassemblies constructed of wrought materialsare given in Part HF, Article 2 and forassemblies constructed of cast iron in PartHC,Article 2.ARTICLE 4PRESSURE RELIEVING DEVICESHG-400 PRESSURE RELIEVINGVALVE REQUIREMENTSTABLE HG-400.1MINIMUM POUNDS OF STEAM PER HOUR(kg/hr)PER SQUARE FOOT (METER) OF HEATINGSURFACEBoiler HeatingFiretubeWatertubeSurfaceBoilersBoilersHand fired5 (24)6 (29)Stoker fired7 (34)8 (39)Oil, gas, orpulverized8 (39)10 (49)fuel firedWaterwallheating surface:Hand fired8 (39)8 (39)Stoker fired10 (49)12 (59)Oil, gas, orpulverized14 (68)16 (78)fuel firedGENERAL NOTES:(a) When a boiler is fired only by a gas having aheat value not in excess of 200 Btu/ft 3 (7 400kJ/m3), the minimum safety valves or safety reliefvalve relieving capacity may be based on the valuesgiven for hand fired boilers above.(b) The minimum safety valve or safety reliefvalve relieving capacity for electric boilers shall be3½ lb/hr/kW (1.6 kg/hr/kW) input.(c) For heating surface determination, see HG403.(d) For extended heating surface, the minimumlb/hr/sq ft may be determined by the M anufacturer[see HG-403 (d)].HG-400.1 Safety Valve Requirementsfor Steam Boilers(a) Each steam boiler shall have one ormore officially rated safety valves that areidentified with the V or HV Symbol of the springpop type adjusted and sealed todischarge at a pressure not to exceed 15 psi(100 kPa).(b) No safety valve for a steam boiler shall besmaller than NPS ½ (DN 15) or larger than NPS4 (DN 100). The inlet opening shall have aninside diameter equal to, or greater than, the seatdiameter.(c) The minimum relieving capacity of valve orvalves shall be governed by the capacity markingon the boiler called for in HG-530.(d) The minimum valve capacity in pounds perhour shall be the greater of that determined bydividing the maximum Btu output at the boilernozzle obtained by the firing of any fuel forwhich the unit is installed by 1,000, or shall bedetermined on the basis of the pounds (kg) ofsteam generated per hour per square foot (m2 ) ofboiler heating surface as given in Table HG400.1. For cast iron boilers constructed to therequirements of Part HC, the minimum valvecapacity shall be determined by the maximumoutput method. In many cases a greater relievingcapacity of valves will have to be provided thanthe minimum specified by these rules. In everycase, the requirementof HG-400.l(e) shall be met.(e) The safety valve capacity for each steamboiler shall be such that with the fuel burningequipment installed, and operated at maximumcapacity, the pressure cannot rise more than 5 psi(35 Kpa) above the maximum allowable workingpressure.(f) When operating conditions are changed, oradditional boiler heating surface is installed, thevalve capacity shall be increased, if necessary, tomeet the new conditions and be in accordancewith HG-400.l (e). The additional valvesrequired, on account of changed conditions, maybe installed on the outlet piping provided there isno intervening valve.HG-400.2 Safety Relief Valve Requirementsfor Hot Water Boilers(a) Each hot water heating or supply boilershall have at least one officially rated safety47
relief valve, of the automatic reseating type,identified with the V or HV Symbol, and setto relieve at or below the maximumallowable working pressure of the boiler.(b) Hot water heating or supply boilerslimited to a water temperature not in excessof 210 F (99 C) may have, in lieu of thevalve(s) specified in (a) above, one or moreofficially rated temperature and pressuresafety relief valves of the automaticreseating type identified with the HVsymbol, and set to relieve at or below themaximum allowable working pressure of theboiler.(c) When more than one safety relief valveis used on either hot water heating or hotwater supply boilers, the additional valvesshall be officially rated and may have a setpressure within a range not to exceed 6 psi(40 kPa) above the maximum allowableworking pressure of the boiler up to andincluding 60 psi (400 kPa), and 5% for thosehaving a maximum allowable workingpressure exceeding 60 psi (400 kPa).(d) No safety relief valve shall be smallerthan NPS ¾ (DN 20) nor larger than NPS 4(DN 100) except that boilers having a heatinput not greater than 15,000 Btu/hr (4.4kW) may be equipped with a rated safetyrelief valve of NPS ½ (DN 15).(e) The required steam relieving capacity,in pounds per hour (kg/h), of the pressurerelieving device or devices on a boiler shallbe the greater of that determined by dividingthe maximum output in Btu at the boilernozzle obtained by the firing of any fuel forwhich the unit is installed by 1,000, or shallbe determined on the basis of pounds (kg) ofsteam generated per hour per square foot(m2 ) of boiler heating surface as given inTable HG-400.1. For cast iron boilersconstructed to the requirements of Part HC,the minimum valve capacity shall bedetermined by the maximum output method.In many cases a greater relieving capacity ofvalves will have to be provided than theminimum specified by these rules. In every case,the requirements of HG-400.2 (g) shall be met.(f) When operating conditions are changed, oradditional boiler heating surface is installed, thevalve capacity shall be increased, if necessary, tomeet the new conditions and shall be inaccordance with HG-400,2(g). The additionalvalves required, on account of changedconditions, may be installed on the outlet pipingprovided there is no intervening valve.(g) Safety relief valve capacity for each boilerwith a single safety relief valve shall be suchthat, with the fuel burning equipment installedand operated at maximum capacity, the pressurecannot rise more than 10% above the maximumallowable working pressure. When more thanone safety relief valve is used, the overpressureshall be limited to 10% above the set pressure ofthe highest set valve allowed by HG-400.2 (c).HG-400.3 Safety and Safety Relief Valvesfor Tanks and Heat Exchangers(a) Steam to Hot Water Supply. When a hotwater supply is heated indirectly by steam in acoil or pipe within the service limitations setforth in HG-101, the pressure of the steam usedshall not exceed the safe working pressure of thehot water tank, and a safety relief valve at leastNPS 1 (DN 25), set to relieve at or below themaximum allowable working pressure of thetank, shall be applied on the tank.(b) High Temperature Water to Water HeatExchanger.1 When high temperature water iscirculated through the coils or tubes of a heatexchanger to warm water for space heating orhot water supply, within the service limitationsset forth in HG-101, the heat exchanger shall beequipped with one or more officially rated safetyrelief valves that are identified with the V or HVSymbol, set to relieve at or below the maximumallowable working pressure of the heatexchanger, and of sufficient rated capacity toprevent the heat exchanger pressure from risingmore than 10% above the maximum allowableworking pressure of the vessel.(c) High Temperature Water to Steam HeatExchanger.14 When high temperature water is48
circulated through the coils or tubes of aheat exchanger to generate low pressuresteam, within the service limitations setforth in HG-101, the heat exchanger shall beequipped with one or more officially ratedsafety valves that are identified with the Vor HV Symbol, set to relieve at a pressurenot to exceed 15 psi (100 kPa), and ofsufficient rated capacity to prevent the heatexchanger pressure from rising more than 5psi (35 kPa) above the maximum allowableworking pressure of the vessel. For heatexchangers requiring steam pressures greaterthan 15 psi (100 kPa), refer to Section I orSection VIII, Division 1.1Suggested installation practices for the secondary sideof heat exchangers.HG-401 MINIMUM REQUIREMENTSFOR SAFETY AND SAFETY RELIEFVALVESHG-401.1 Mechanical Requirements(a) The inlet opening shall have an insidediameter approximately equal to, or greaterthan, the seat diameter. In no case shall themaximum opening through any part of thevalve be less than ¼ in. (6 mm) in diameteror its equivalent area.(b) Safety relief valves officially rated asto capacity shall have pop action whentested by steam.(c) O-rings or other packing devices whenused on the stems of safety relief valvesshall be so arranged as not to affect theiroperation or capacity.(d) The design shall incorporate guidingarrangements necessary to insure consistentoperation and tightness. Excessive lengths ofguiding surfaces should be avoided. Bottomguided designs are not permitted on safetyrelief valves.(e) Safety valves shall have a controlledblowdown of 2 psi to 4 psi (15 kPa to 30kPa) and this blowdown need not beadjustable.(f) Safety valves shall be spring loaded.The spring shall be designed so that the fulllift spring compression shall be no greater than80% of the nominal solid deflection. Thepermanent set of the spring (defined as thedifference between the free height and heightmeasured 10 min after the spring has beencompressed solid three additional times afterpresetting at room temperature) shall not exceed0.5% of the free height.(g) There shall be a lifting device and amechanical connection between the lifting deviceand the disk capable of lifting the disk from theseat a distance of at least 1/16 in. (1.5 mm) withno pressure on the boiler.(h) A body drain below seat level shall beprovided by the Manufacturer for all safetyvalves and safety relief valves, except that thebody drain may be omitted when the valve seat isabove the bottom of the inside diameter of thedischarge piping. For valves exceeding NPS 2½(DN 65) the drain hole or holes shall be tappednot less than NPS
EXCERPTS FROM: ASME BOILER AND PRESSURE VESSEL CODE SECTION IV - HEATING BOILERS 2010 EDITION . the ASME Boiler and Pressure Vessel Code. . When a boiler is fired only by a gas having a heat value not in excess of 200 Btu/ft3 (7 400
1½" ASME, 300 lb 5 E 1½" ASME, 600 lb 5 F 2" ASME, 150 lb 5 G 2" ASME, 300 lb 5 H 2" ASME, 600 lb 5 J 3" ASME, 150 lb 5 K 3" ASME, 300 lb 5 L 3" ASME, 600 lb 5 M 4" ASME, 150 lb 5 N 4" ASME, 300 lb 5 P 4" ASME, 600 lb 5 Q Welded flange, 316L stainless steel, Type A flat faced1) DN 25, PN 16 6 A DN 25, PN 40 6 B DN 40, PN 16 6 C DN 40, PN 40 6 .
1½" ASME, 300 lb 5 E 1½" ASME, 600 lb 5 F 2" ASME, 150 lb 5 G 2" ASME, 300 lb 5 H 2" ASME, 600 lb 5 J 3" ASME, 150 lb 5 K 3" ASME, 300 lb 5 L 3" ASME, 600 lb 5 M 4" ASME, 150 lb 5 N 4" ASME, 300 lb 5 P 4" ASME, 600 lb 5 Q Welded flange, 316L stainless steel, Type A flat faced DN 25, PN 16 6 A DN 25, PN 40 6 B DN 40, PN 16 6 C DN 40, PN 40 6 D .
ASME B16.11 Tees Dimensions ASME B16.11 Reducers Dimensions ASME B16.11 Bushing Dimensions ASME B16.11 Caps Dimensions ASME B16.11 Crosses Dimensions ASME B16.11 Couplings Dimensions ASME B16.11 Plugs Dimensions ASME B16.11/BS 3799 Pipe Nipples Dimensions BS 3799 Unions Dimensions ASME B16.11/BS 3799 Swag
the boiler and they have to enter the registration number of the boiler along with the following details a. Boiler Details : User need to provide following details of the boiler i. Types of Boiler/ Economizer ii. Total Heating Surface Area (Sq. mt) iii. Name of Manufacturer iv. Boiler/ Small Industrial Boiler/ Economizer Works Number v.
Fire tube steam boilers may be either high or low pressure boilers. There are three types of fire tube steam boilers: (i) horizontal return tubular boiler, (ii) scotch marine boiler, and (iii) vertical fire tube boiler. The boiler studied in the present experiment is horizontal return tubular boiler. This boiler is a 3 pass fire tube boiler.
Raypak Hi-Delta Boiler Raypack Hi-Delta boiler with on/off state animations. Murray Boiler Murray boiler with flame animation. Multistack Boiler Multistack boiler with open/closed version but no animations. Superior Boiler Superior boiler with flame animation. F - salesqagraphicscom C 515-965-3403 O S P O S P O S P O S P O S P O S P D
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
The standards are neither curriculum nor instructional practices. While the Arizona English Language Arts Standards may be used as the basis for curriculum, they are not a curriculum. Therefore, identifying the sequence of instruction at each grade - what will be taught and for how long- requires concerted effort and attention at the local level. Curricular tools, including textbooks, are .
