1、Designation: F856 97 (Reapproved 2018) An American National StandardStandard Practice forMechanical Symbols, ShipboardHeating, Ventilation, andAir Conditioning (HVAC)1This standard is issued under the fixed designation F856; the number immediately following the designation indicates the year of orig
2、inaladoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department o
3、f Defense.1. Scope1.1 This practice covers symbols used on heating,ventilation, and air conditioning (HVAC) detailed engineeringdrawings.1.2 These symbols may be useful on contract and prelimi-nary design drawings.1.3 This international standard was developed in accor-dance with internationally reco
4、gnized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Significance and Use2.1 When symbolic representation is requ
5、ired for an itemnot covered in this standard, the character of the symbol shallbe adequately identified and shall be subject to one interpreta-tion only. If necessary, a note shall be attached to the symbolfor further clarity.2.2 Symbolic representation does not require exact or scalelayouts of the
6、actual system. Therefore, the symbols may beused in all views of the system layout.3. Abbreviations3.1 The abbreviations (for use only in this practice) aredefined as follows:AF = axial fanAFD = automatic fire damper with manual overrideBD = balance damperCC = cooling coilCCW = counter clockwiseCE =
7、 convection heater, electricCF = centrifugal fanCS = convection heater, steamCW = clockwiseEH = turret heater, electricEP = duct preheater, electricER = duct reheater, electricEU = electric unit heaterF = filterFA = flame arresterFCA = fan coil assemblyFCU = fan coil unitG = grilleGC = gravity cooli
8、ng coilH = humidistat, humidifierL = louverM = motorMFD = manual fire damperNE = natural exhaustNS = natural supplyR = return airRO = remote operatedSFD = solenoid fire damperSP = preheater, steamSR = reheater, steamSU = steam unit heaterT = thermostatTE = tempered air, electricTS = tempered air, st
9、eamU = undercutUC = unit coolerV = volume, volumetricVC = volume control4. Illustrations4.1 Illustrations for HVAC symbols are given in Figs. 1-4.5. Keywords5.1 air conditioning; design symbols; engineering symbols;heating; HVAC; marine; ship; symbols; ventilation1This practice is under the jurisdic
10、tion of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved Sept. 1, 2018. Published October 2018. Originallyapproved in 1983. Last previous edition approved in 2014 as F856 97 (2014).DOI: 10
11、.1520/F0856-97R18.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDe
12、velopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1NOTE 1“Class A” is in reference to bulkhead classification as described in the Code of Federal Regulations, Title 46, Section 92.075. (Availablefrom U.
13、S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http:/www.access.gpo.gov.)FIG. 1 HVAC Symbols for Air Flow DuctsF856 97 (2018)2NOTE 1“Class A” is in reference to bulkhead classification as described in the Code of Federal Regulations, Ti
14、tle 46, Section 92.075. (Availablefrom U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http:/www.access.gpo.gov.)FIG. 2 HVAC Symbols for Duct FittingsF856 97 (2018)3FIG. 2 HVAC Symbols for Duct Fittings (continued)F856 97 (2018)4NOTE 1
15、This symbol is commonly referred to as a Breidert ventilator.FIG. 3 HVAC Symbols for VentilatorsF856 97 (2018)5NOTE 1This symbol is commonly referred to as a Gaylord hood.FIG. 4 HVAC Symbols for AppliancesF856 97 (2018)6ASTM International takes no position respecting the validity of any patent right
16、s asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any t
17、ime by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will
18、 receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM
19、 International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 97 (2018)7
