ASTM F1139-88(1998)

Standard Specification for Steam Traps and Drains

SCOPE
1.1 This specification  provides the minimum requirements for the design, fabrication, pressure rating, marking, and testing of steam traps and drains.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following safety hazards caveat pertains only to the test method portion of this specification. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Apr-1998
• ICS: 47.020.30 - Piping systems
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaced By: ASTM F1139-88(2004) - Standard Specification for Steam Traps and Drains
• Effective Date: 01-Nov-2004

Standards Content (Sample)

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn
Contact ASTM International (www.astm.org) for the lastest information
Designation: F 1139 – 88 (Reapproved 1998) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Steam Traps and Drains
This standard is issued under the fixed designation F 1139; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.3 ASME Standards:
ANSI/ASME PTC39.1 Condensate Removal Devices for
1.1 This specification provides the minimum requirements
Steam Systems
forthedesign,fabrication,pressurerating,marking,andtesting
ASME Boiler and Pressure Vessel Code, Section VIII,
of steam traps and drains.
Division I, Pressure Vessels
1.2 The values stated in inch-pound units are to be regarded
ASMEBoilerandPressureVesselCode,SectionIX,W eld-
as the standard. The values given in parentheses are for
ing and Brazing Qualifications
information only.
1.3 The following safety hazards caveat pertains only to the
3. Definitions of Terms Specific to This Standard
testmethodportionofthisspecification.Thisstandarddoesnot
3.1 cold condensate capacity (QC)—maximum mass of
purport to address all of the safety concerns, if any, associated
condensate that the steam trap/drain can discharge in 1 h at a
with its use. It is the responsibility of the user of this standard
givenpressureandtemperature,thetrap/drainbeingfullyopen
to establish appropriate safety and health practices and
(lb/h (kg/h)).
determine the applicability of regulatory limitations prior to
3.2 drain—device having no moving parts permitting the
use.
discharge of fluids at a fixed or adjustable rate.
2. Referenced Documents 3.3 hot condensate capacity (QH)—maximum mass of con-
densate that a steam trap/drain can discharge in 1 h at a given
2.1 ANSI Standards:
pressure and temperature (lb/h (kg/h)).
B16.1 Cast Iron Pipe Flanges and Flanged Fittings
3 3.4 hydrostatic proof test (PTHP)—testusedindetermining
B16.3 Malleable-Iron Screwed Fittings
maximum allowable pressure (PMA) and maximum allowable
B16.4 Cast-Iron Screwed Fittings
2 2
temperature (TMA) (lb/in. (kg/mm )).
B16.5 Steel Pipe Flanges and Flanged Fittings
3.5 maximum allowable pressure (PMA)—maximum pres-
B16.11 Forged Steel Fittings Socket-Welding and
sure that the shell of the steam trap/drain can withstand
Threaded
2 2
permanently at a given temperature (lb/in. (kg/mm )).
B16.15 Cast Bronze Screwed Fittings
3.6 maximum allowable temperature (TMA)—maximum
B16.18 Cast Bronze Solder-Joint Pressure Fittings
temperature to which the shell of the steam trap/drain can be
B16.22 Wrought Copper and Bronze Solder-Joint Pressure
raised permanently (°F (°C)).
Fittings
3.7 maximum differential pressure (DPMX)—maximumdif-
B16.24 Bronze Flanges and Flanged Fittings
ference between operating pressure and operating back pres-
B16.34 Steel Valves, Flanged and Buttweld Ends
2 2
3 sure (lb/in. (kg/mm )).
B31.1 Power Piping
3.8 maximumoperatingbackpressure(PMOB)—maximum
2.2 MSS Standards:
permissible pressure measured at the outlet of the steam
SP-25 Standard Marking System for Valves, Fittings,
2 2
trap/drain allowing correct functioning (lb/in. (kg/mm )).
Flanges, and Unions
3.9 maximum operating pressure (PMO)—pressure for
SP-51 150lbCorrosionResistingCastFlangesandFlanged
which a steam trap/drain is rated by the manufacturer.
Fittings
3.9.1 Discussion—This pressure is normally a function of
the limitations related to the internal mechanism of the steam
2 2
trap/drain (lb/in. (kg/mm )).
This specification is under the jurisdiction ofASTM Committee F-25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.13 on
3.10 maximum test pressure (PTMX)—maximum pressure
Piping Systems.
applied to the steam trap/drain under test including its internal
Current edition approved Feb. 26, 1988. Published April 1988.
2 2
mechanism (lb/in. (kg/mm )).
This specification was developed from Fluid Controls Institute Standards, 69-1
Pressure Rating Standards for Steam Traps and 85-1 Standard Production Test for 3.11 minimum differential pressure (DPMN)—minimum
Steam Traps.
difference between operating pressure and operating back
Available from American National Standards Institute, 11 W. 42nd St., 13th
Floor, New York, NY 10036.
4 5
Available from Manufacturer’s Standardization Society of the Valve and Available from American Society of Mechanical Engineers, 345 E. 47th St.,
Fittings Industry, Inc., 1815 N. Fort Myers Dr., Arlington, VA 22209. New York, NY10017.
F 1139
2 2
pressure (lb/in. (kg/mm )). these materials, are at least equal to the requirements of the
3.12 operating back pressure (POB)—pressure measured at appropriate specifications.
the outlet of the steam trap/drain under operating conditions 5.1.2 Housingsoftraps/drains,andotherpartsorbolting,or
2 2
(lb/in. (kg/mm )). combination thereof, used for pressure retention, shall be
3.13 operating differential pressure (DP)—difference be- constructed of materials in accordance with ANSI/ASME
tween the operating pressure and the operating back pressure B31.1 or Section VIII, Division 1 of the ASME Boiler and
2 2
(lb/in. (kg/mm )). Pressure Vessel Code.
3.14 operating pressure (PO)—pressure measured at the 5.1.3 Seals and parts, in addition to pressure containing
inlet of the steam trap/drain under operating conditions (lb/ parts and bolting used for pressure retention, shall be of
2 2
in. (kg/mm )). materials suitable for the service.
3.15 operating temperature (TO)—temperaturemeasuredat 5.1.4 Users are cautioned against applications with fluids
the inlet of the steam trap/drain under operating conditions (°F that may react chemically with any materials used in these
(°C)). products.
3.16 performance characteristics tests—tests carried out to 5.1.5 For materials not having values of allowable stress
determine the operational characteristics of a particular design tabulated in Section VIII, Division 1, allowable stresses shall
of steam trap/drain. be determined in accordance with the procedures outlined in
3.17 productiontests—testscarriedoutbythemanufacturer Subsection C and Appendix P of Section VIII of the ASME
to confirm that the steam trap/drain functions correctly. Boiler and Pressure Vessel Code. Where it can be shown that
3.17.1 Discussion—These tests may be witnessed by the the values of allowable stress listed for a particular material in
purchaser or his representative. In this case, these tests are one product form (because of similar chemistry, mechanical
referred to as acceptance tests. properties, directional properties, heat treatment, and so forth)
3.18 steam trap—self-contained valve that automatically areapplicabletothesamematerialinanunlistedproductform,
drains the condensate from a steam containing enclosure while the listed values of allowable stress may be used.
remainingtighttolivesteam,orifnecessary,allowingsteamto 5.2 Manufacture:
flow at a controlled or adjusted rate. 5.2.1 Steam traps/drains with end fittings in compliance
3.18.1 Discussion—Moststeamtrapswillalsopassnoncon- with the following standards may be used within the pressure-
densable gases while remaining tight to live steam. temperature ranges permitted by the applicable standard pro-
vided the trap/drain housing (less end fittings) is satisfactory
4. Ordering Information
for these conditions:
4.1 Ordersforproductsunderthisspecificationshallinclude
5.2.1.1 ANSI B16.1,
the following information as applicable:
5.2.1.2 ANSI B16.3,
4.1.1 Performance characteristics required—See Section 7.
5.2.1.3 ANSI B16.4,
4.1.2 Certification of performance characteristics if re-
5.2.1.4 ANSI B16.5,
quired. See Section 7.
5.2.1.5 ANSI B16.11,
4.1.3 Nominal pipe size.
5.2.1.6 ANSI B16.15,
4.1.4 Maximum operating pressure, psig (kPa). See 3.5.
5.2.1.7 ANSI B16.18,
4.1.5 Capacity, lb/h (kg/h) (QC or QH). See 3.17 and 3.18.
5.2.1.8 ANSI B16.22,
4.1.6 Connection type (that is, threaded, socket weld,
5.2.1.9 ANSI B16.24,
flanged). See 5.2.1.
5.2.1.10 ANSI B16.34, and
4.1.7 Materials—external and internal.
5.2.1.11 MSS SP-51.
4.1.8 Type of trap/drain. 5.2.2 Weld design details, welding, and nondestructive test-
4.1.9 Maximum test pressure, psig (kPa). See 3.12.
ingshallbeinaccordancewithSectionVIII,Division1,ofthe
4.1.10 Maximum allowable pressure, psig (kPa). See 3.14. ASME Boiler and Pressure Vessel Code. Welders and weld
4.1.11 Pressure differential (operating, maximum, or mini-
procedures shall be qualified in accordance with Section IX of
mum, or combination thereof). the ASME Boiler and Pressure Vessel Code.
4.1.12 Notice for Acceptance Test—If the purchaser wishes
6. Requirements
to witness the production tests, this shall be specified in the
6.1 Pressure Rating and Design:
order. See 8.2.
6.1.1 The maximum allowable pressure (PMA) and maxi-
5. Materials and Manufacture
mum allowable temperature (TMA) rating for steam traps/
5.1 Materials: drains conforming to this specification shall be established by
5.1.1 The pressure ratings established under this specifica- at least one of the following methods:
tion are based upon materials of high quality produced under 6.1.1.1 Proof test in accordance with the requirements
regular control of chemical and mechanical properties by a prescribed in paragraph UG-101 of Section VIII of theASME
recognized process. The manufacturer shall be prepared to Boiler and PressureVessel Code. If burst-type tests as outlined
certify that his product has been so produced and that the in UG-101(m) are used, it is not necessary to rupture the
mechanical and chemical properties thereof, as proved by test component. In this case, the value of “B’’ to be used in
specimens and nondestructive testing or as documented by determining the maximum allowable pressure shall be the
certifications from the producer or recognized distributor of maximum pressure to which the component was subjected
F 1139
without rupture. Safety of personnel shall be given serious 7.7 Condensate Capacity (QH or QC)—The steam trap/
consideration when conducting hydrostatic tests. Components drain shall be flow tested to determine its condensate capacity
thathavebeensubjectedtoahydrostaticprooftestshallnotbe throughout its operating pressure range.
offered for sale. 7.8 Live Steam Loss—The steam trap shall be tested to
6.1.1.2 Design calculations in accordance with the require- determine the amount of live steam lost through the trap.
me
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