ASTM F856-97(2022)
(Practice)Standard Practice for Mechanical Symbols, Shipboard—Heating, Ventilation, and Air Conditioning (HVAC)
Standard Practice for Mechanical Symbols, Shipboard—Heating, Ventilation, and Air Conditioning (HVAC)
SIGNIFICANCE AND USE
2.1 When symbolic representation is required for an item not covered in this standard, the character of the symbol shall be adequately identified and shall be subject to one interpretation only. If necessary, a note shall be attached to the symbol for further clarity.
2.2 Symbolic representation does not require exact or scale layouts of the actual system. Therefore, the symbols may be used in all views of the system layout.
SCOPE
1.1 This practice covers symbols used on heating, ventilation, and air conditioning (HVAC) detailed engineering drawings.
1.2 These symbols may be useful on contract and preliminary design drawings.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F856 − 97 (Reapproved 2022) An American National Standard
Standard Practice for
Mechanical Symbols, Shipboard—Heating, Ventilation, and
Air Conditioning (HVAC)
ThisstandardisissuedunderthefixeddesignationF856;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
CCW = counter clockwise
CE = convection heater, electric
1.1 This practice covers symbols used on heating,
CF = centrifugal fan
ventilation, and air conditioning (HVAC) detailed engineering
CS = convection heater, steam
drawings.
CW = clockwise
1.2 These symbols may be useful on contract and prelimi-
EH = turret heater, electric
nary design drawings.
EP = duct preheater, electric
ER = duct reheater, electric
1.3 This international standard was developed in accor-
EU = electric unit heater
dance with internationally recognized principles on standard-
F = filter
ization established in the Decision on Principles for the
FA = flame arrester
Development of International Standards, Guides and Recom-
FCA = fan coil assembly
mendations issued by the World Trade Organization Technical
FCU = fan coil unit
Barriers to Trade (TBT) Committee.
G = grille
GC = gravity cooling coil
2. Significance and Use
H = humidistat, humidifier
2.1 When symbolic representation is required for an item
L = louver
not covered in this standard, the character of the symbol shall M = motor
MFD = manual fire damper
be adequately identified and shall be subject to one interpreta-
NE = natural exhaust
tion only. If necessary, a note shall be attached to the symbol
NS = natural supply
for further clarity.
R = return air
2.2 Symbolic representation does not require exact or scale
RO = remote operated
layouts of the actual system. Therefore, the symbols may be
SFD = solenoid fire damper
used in all views of the system layout.
SP = preheater, steam
SR = reheater, steam
3. Abbreviations
SU = steam unit heater
3.1 The abbreviations (for use only in this practice) are T = thermostat
TE = tempered air, electric
defined as follows:
TS = tempered air, steam
AF = axial fan
U = undercut
AFD = automatic fire damper with manual override UC = unit cooler
BD = balance damper V = volume, volumetric
CC = cooling coil VC = volume control
4. Illustrations
This practice is under the jurisdiction of ASTM Committee F25 on Ships and
4.1 Illustrations for HVAC symbols are given in Figs. 1-4.
Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems. 5. Keywords
Current edition approved Oct. 1, 2022. Published October 2022. Originally
5.1 air conditioning; design symbols;
...
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