Asme B16.39-1998

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The American Society of

Mechanical Engineers
A N
A M E R I C A N A T I O N A S
L T A N D A R D
MALLEABLE IRON
THREADED PIPE UNIONS
Classes 150,250, and 300
ASME B16.3N-1NU8
(Revision 01 ASMVANSI B16.39-1886)

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Date of Issuance: December 31, 1998
The 1998 edition of thisStandard is being issued with an automatic addenda

subscription service. The use of addenda allows revisions made in response
to public review comments
or committee actionsto be published ona regular
yearly basis; revisions published in addenda will become effective 6 months
after the Date of Issuance of the addenda. The next edition of this Standard
is scheduled for publication in 2003.
ASME issues written replies to inquiries concerning interpretationsof

technical aspects of this Standard. The interpretations will be included with
the above addenda service.
ASME is the registered trademark of The American Society of Mechanical Engineers.
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This code or standard was

developed under procedures accreditedas meeting the criteria for
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Copyright O 1998 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All Rights Reserved
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S T D - A S M E B L b - 3 7 - E N G L L798
0 7 5 7 b 7 0 Ob08227
58b
FOREWORD
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(This Foreword is not part of ASME B16.39-1998.)
In 1921, the American Engineering Standards Committee, later the American Standards
Association (ASA), now the AmericanNational Standards Institute (ANSI), authorized the
organization of a Sectional Committee on the Standardization of Pipe Flanges and Flanged
Fittings, with
the
following organizations as joint sponsors: Heating, Piping, andAir
Conditioning Contractors National Association, later the Mechanical Contractors Association
of America (MCAA); Manufacturers Standardization Society of the Valve and Fittings
Industry (MSS); andtheAmerican
Society of Mechanical Engineers (ASME).
Threaded fittings were added to the scope of the BI6 Committee, and Subcommittee No.
2 (now Subcommittee B) wasmade
responsible for threaded fittings other than steel.
Standards for cast and malleable iron fittings were approved byASA as early as 1927.
For many years, theneed for standardization of threaded malleable ironunionswasmet
by Federal Specifications (published by the General Services Administration) and other
documents published by the Association of American Railroads (AAR) and the Underwriters
Laboratories (UL). As these standards continued to diverge, however, manufacturers concluded
that a common practice would be desirable. Accordingly, beginning in 1967, MSS developed
a standard practice embodying features of the existing standards and published it as MSS
SP-76-1970.
During the next few years, ANSI recognition of the AAR and UL standards was withdrawn
in favor of SP-76, and in 1975 MSS submitted its standards to Subcommittee B of American
National Standards Committee B16 for consideration as an AmericanNational Standard.
After several modifications and the addition of metric equivalents, the Standard was approved
by the Committee, cosecretariat organizations, and ANSI. Itwasthen
published withthe
designation ANSI B16.39-1977.
In 1982American National Standards Committee B16was reorganized as an ASME
Committee operating under procedures accredited by ANSI. The 1986 edition of B16.39
updatedthereferenced standards and specifications, established U.S. customary units as the
standard, and provided for electrodeposition as an alternative to hot dipping for any application
of zinc coating. Following approval by the Standards Committee and ASME, approval as
an AmericanNational Standard was given by ANSIon December 31, 1986, with the new
designation ASME/ANSI B 16.39-1986.
In the 1998 edition of ASME B16.39, reference standards are updated, a quality system
programannexis
added, and several editorial revisions are made. Following approval by
ASME BI6 Subcommittee B and the B16 Main Committee, ANSI approved this American
National Standard onNovember 20, 1998.
Requests for interpretation or suggestions for revision should be sent tothe Secretary,
B 16 Committee, The American Society of Mechanical Engineers, Three Park Avenue, New
York, NY 10016-5990.
...
111

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ASME B16 COMMITTEE

Standardization of Valves, Flanges, Fittings, Gaskets,
and Valve Actuators
(The following is theroster of the Committee at the time of approvalof this Standard.)
OFFICERS
W. N. McLean, Chair
H. R. Sonderegger. Vice Chair
P. A. Reddington, Secretary
COMMITTEE PERSONNEL
R. W. Barnes, Anric Enterprises, Etobicoke, Ontario, Canada
R. R. Brodin, Fisher Controls International, Inc., Marshalltown, Iowa
M. A. Clark, Nibco, Inc., Elkhart, Indiana
A. Cohen, A. Cohen and Associates, Albuquerque, New Mexico
C. E. Floren, Mueller Co., Decatur, Illinois
D. R. Frikken. Solutia, Inc., St. Louis, Missouri
R. Henrich, Minnegasco, Inc., Golden Valley, Minnesota
J. C. Inch, Mueller Refrigeration Products Co., Hartsville, Tennessee
G. A. Jolly, Vogt Valve Co., Louisville, Kentucky
W. G. Knecht, BW/IP International, Inc.. Williamsport, Pennsylvania
R. Koester, The William Powell Co.. Cincinnati, Ohio
W. N. McLean, Newco Valves, Palos Park, Illinois
M. L. Nayyar, Bechtel Power Corp., Gaithersburg, Maryland
P. A. Reddington, American Society of Mechanical Engineers, New York, New York
R. A. Schmidt, Trinity-Ladish Co., Russellville, Arkansas
H. R. Sonderegger, Grinnell Corp., Cranston, Rhode Island
W. M. Stephan, Flexitallic, Inc., Mount Laurel, New Jersey
T. F. Stroud, Ductile Iron Pipe Research Association, Birmingham, Alabama
M. D. Wasicek, ABS Americas, Houston, Texas
R. E. White, Richard E. White and Associates, South Bend, Indiana
D. A. Williams, Southern Company Services, Birmingham, Alabama
L. A. Willis, The Dow Chemical Co., Freeport, Texas
W. R. Worley, Union Carbide Corp., South Charleston, West Virginia
SUBCOMMITTEE B
- THREADED FITTINGS (EXCEPT STEEL)
H. R. Sonderegger, Chair, Grinnell Corp., Cranston, Rhode Island

B. P. Feder, Secretary, American Society of Mechanical Engineers, New York, New York
K. Barron, Ward Manufacturing, Blossburg, Pennsylvania
M. A. Clark, Nibco, Inc., Elkhart, Indiana
A. Cohen, A. Cohen and Associates, Albuquerque, New Mexico
A. A. Knapp, Canadian Copper/Brass Development Association, North York, Ontario, Canada
R. L. Larkin, American DarlingValve, Birmingham, Alabama
P. 1. McGrath, Jr., Consultant, Birmingham, Alabama
W. N. McLean, Newco Valves, Palos Park, Illinois
J. K. Schultz, Conine Manufacturing Co., Inc., Tyler, Texas

CONTENTS
1 Scope ...........................................................................
2 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
....................................................
3 Pressure-TemperatureRatings
4 Size ............................................................................
5 Marking ........................................................................
6 Materials ........................................................................
7 Joints and Seats .................................................................
8 Threading of PipeEnds ..........................................................
9 Hydrostatic Strength .............................................................
10 Tensile Strength .................................................................
1 1 Air Pressure Test ................................................................
12 Sampling for Air Pressure Test ..................................................
13 Coatings ........................................................................
14 Dimensions .....................................................................
...
111
1
1
1
1
1
1
2
2
2
2
2
2
3
3
Tables
1 Pressure-Temperature Ratings ....................................................
2 Tensile Strength of Unions .......................................................
3 Dimensions of Class 150 Malleable Iron Threaded Unions .........................
Mandatory Annex
I
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nonmandatory Annexes
A Metric (SI) Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Quality System
Program
.........................................................
9
15

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Foreword ..........................................................................
Standards Committee Roster .........................................................
ASME 816.39-1998
MALLEABLE IRON THREADED PIPE UNIONS
1 SCOPE
1 .I General
This Standard for threaded malleable ironunions,
classes 150, 250,and 300, provides requirements for
the following:
(a) design
(6) pressure-temperature ratings
(c) size
(d) marking
( e ) materials
0 joints and seats
(g) threads
( h ) hydrostatic strength
(i) tensile strength
(j) air pressure test
( k ) sampling
(1) coatings
(m) dimensions
copper, or copper alloy. The threaded ends shall be

male or female pipe threads. The head or female part
may be furnished as a coupling, an elbow, or a tee.
3 PRESSURE-TEMPERATURE RATINGS
Pressure-temperature ratings for these unions are

shown in Table 1. Unions with copper or copper alloy
seats are not intended for use where temperature exceeds
450F (232C). Metric units (bar) are shown in Table A l .
4 SIZE
The sizes of unions shown in the tables are identified

by the corresponding nominal pipe sizes (NPS) defined
in ASME B36.10M.
1.2 StandardUnits
5 MARKING
U.S. customary units are the standard. Metric units

are shown for information and reference only. (See
Annex A.)
Unions shall be marked on the nut with the manufacturer's name or trademarkandnominal pressure class
except on bar stock unions, where marking is impractical. Additional markings permitted by MSS SP-25 may
be used.
1.3 Quality Systems

Requirements relatingto the product manufacturers'
quality system programs are described in Annex B.
6 MATERIALS
1.4 References
Standards and specifications adopted by reference in
this Standard are shown in Annex I, whichispart of
this Standard.
2 DESIGN
The complete union shall consist of a tail or male
part, a head or female part, and a union nut. The type
of joint maybe ball-to-cone, ball-to-ball, or ball-andsocket with metal-to-metal seating surfaces of iron,

(a) The mechanical properties of the malleable iron

castings shallbe at least equal to thosespecified in
ASTM A 197. Insert rings may be of suitable copper
or copper alloy.
(b) Steelbar stock having a yield strength of not
less than 30 ksi (207 MPa) may beused in producing
NPS y8 unions.
(c) Where copper alloy seats are furnished, either
the head or tail part of unions produced from bar ,stock
maybe solid copper alloy. Such partsmustmeet
the
tensile strength requirements listed in Table 2.
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Classes 150,250,and 300
ASME 816.39-1998
TABLE 2 TENSILE STRENGTH OF UNIONS
TABLE 1 PRESSURE-TEMPERATURE
RATINGS
Ultimate Load, Ibf
Pressure, psig
Temperature,
"F
Class
150
Class
250
Class
300
-20 to 150
200
250
300
350
300
265
225
185
150
500
455
405
360
315
600
550
505
460
415
400
450
500
550
110
75
270
225
180
130
370
325
280
230
...
...
Class
150
Class
250
Class
2500
3800
5300
7700
10,600
2500
3800
5300
7700
10,600
4000
10,000
14,000
1
1'/4
15;
15,500
2 1,300
25,800
15,500
2 1,300
25,800
18,000
23,000
28,000
2
25;
3
4
30,000
35,000
40,000
50.000
30,000
35,000
40,000
50.000
40,000
55,000
75,000
110.000
Nominal
Pipe Size
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7 JOINTSAND SEATS
300
6000
8000
GENERAL NOTE:Ultimate loads in metric (SI) units are shown

in Table A2.
Inserts shallbesecuredintothe
ends to become a
permanentpart ofthemwith
no signs of cracking.
Inserted seat rings shall be of sufficient width to allow
ample bearing for the seating ofthemale end.
10 TENSILE STRENGTH
(a) Assembled unions shall be capable of withstanding, without rupture, the ultimate loads shown in Table
2 whentested asdescribed in Sections 1 1 and12.
(b) Tests shall be conducted by attaching threaded
steelbars or tubing to each end of the unionusing
the pipe threadsprovided.Bars
or tubingaretobe
securedin
a tensile testingmachine.Loadshall
be
increased at a uniformrateuntiltheultimateloadis
attained.
8 THREADING OF PIPE ENDS

8.1 Types of Threads
Pipe ends ofheadandtail
parts shall bethreaded
with taper pipe threads (ASME B1.20.1), except that
NPS I/, unionsmadefrombarstock
may have NPSC
internalstraightpipethreads.
8.2 Tolerances
The variation in taper threading shall belimited to
one turnlargeand
one turn small fromthegaging
face of theringandgagingnotchontheplugwhen
usingworking gages.
Whengaginginternalthreads,thenotchshould
be
flushwiththebottomofthe
chamfer, whichshallbe
consideredtheintersection
of the chamfercone and
the pitch cone of the thread. This depth is approximately
equal to one-halfthreadfromtheend
of thehead or
tailpart.
11 AIRPRESSURETEST
Assembled unions selected in accordance with Section
12 shallbetestedwith
air at a minimumpressure of
40 psig (2.8 bar).
12 SAMPLING FORAIRPRESSURETEST
A random sample ofunionsrepresentativeofthe
production lot shall be presented
for testing in accordance with Section 1 1. Theaverage outgoing quality
limit (AOQL) of the established acceptable sampling
plansused shall notexceed2%.
A lot for purposes
of thisStandardisdefined
as thenumber of unions
of the same size, design, and pressure rating submitted
fortesting at any one time.
9 HYDROSTATIC STRENGTH
Assembled unions shall be
capable of withstanding,
withoutrupture or leakagethroughtheshell
or at the
union joint, an internalhydrostaticpressure
of five
times the cold (150"F,66C) pressure rating for 1 min.
2

ASME 816.39-1998
13 COATINGS
13.1 Malleable Iron Unions
Galvanized unions shall be either hotdipped
in
accordance withASTM A 153 prior to machining or
electroplated in accordance withASTM B 633, Type
1, Service Condition 4, after machining. Hot dipped
coatings shall be a minimum thickness of 0.0034 in.
Electroplating shall be a minimum thickness of 0.001 in.
13.2 Steel Unions

Galvanized unionsmadefromsteel
bar stock shall
have either electroplated zinc coatings conforming to
ASTM B 633, Type 1, Service Condition 4, or cadmium
coatings conforming toASTM A 165, Type NS. The
electrodeposited coatings shallbeapplied
after machining.
14 DIMENSIONS
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Dimensions in inches are given in Tables 3 through

5. Dimensions in millimeters are given in Tables A3
throughA5 in AnnexA.
3
DED
IRON
MALLEABLE
ASME 616.39-1998
PIPE UNIONS
Head or female
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Alternate
Design
TABLE 3 DIMENSIONS OF CLASS 150

MALLEABLE IRON THREADED UNIONS
Nominal
Pipe Size
0.32
1.44
1.61
0.36
0.30
?la
1.10
1.26
:
12
3
14
2.03
3.00
4.03
1
1v4
1v2
2
2 72 4.12
3
4
A.
Min.
B,
Min.
1.26
0.21
0.36
0.52
0.61
0.80
0.93
.o0
2.06
1.31
1.55
2.38
c.
Min.
0.
Min.
1.45
1.71
1.72
1.94
0.43
0.50
2.07
2.50
2.82
2.26
2.41
0.58
0.67
0.70
3.41
0.92
4.75
6.00
2.75
3.22
3.50
3.85
0.75
0.98
1.O8
GENERAL NOTE: Dimensions are in inches.

ASME 816.39-1998
Head or fe
Part
Union nut
C min.
Tail or maleT
Part
B min.
across flats
,
I
Alternate
Design
Nominal
Pipe Size
B.
A.
Min.
Min.
C.
Min.
D.
Min.
"4
0.21
0.30
0.42
0.54
0.74
0.93
1.11
1.26
1.45
1.71
1.26
1.55
1.71
1.81
2.07
0.30
0.43
0.47
0.57
0.64
1
1'/4
15;
0.95
1.27
1.50
2.07
2.57
2.89
2.31
2.62
2.78
0.75
0.84
0.87
2
2'/2
3
4
1.93
2.32
2.90
3.82
3.48
4.15
4.96
6.47
3.13
3.52
3.84
4.39
1.o0
1.17
1.23
1.33
78
'12
5
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S T D - A S M E BLb.37-ENGL
0757b70 Ob08237 b 5 2
L778
PIPE UNIONS
EABLE
B16.39-1998 ASME
B min.
across flats
Alternate
Design

B.
1.26
0.21
0.30
1.55
1.71
0.42
0.54
2.12
0.74
0.93
1.33
1.50
1.76
2.15
1
1'/4
1'/2
2.31
1.27
2.66
1.50
2.48
3.02
3.28
2
2 Y2
3
4
3.23
3.33
2.32
3.96
4.72
5.37
7.00
'/a
'14
/a
'12
74
0.95
1.93
2.90
3.82
4.47
c.
1.81
2.85
0.30
0.43
0.47
0.57
0.64
0.75
0.84
0.87
1.o0
4.09
6
0.
1.17
1.23
1.33
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A.
Min.
Nominal
Min.
PipeMin.
Size Min.
ASME 616.39-1998
ANNEX I
REFERENCES
(This Annex is part of ASME 816.39-1998.)
The following is a list of publications referenced in

this Standard.
Publisher: American Society for Testing and Materials,

100 Barr Harbor Drive, West Conshohocken, PA
I9428
IS0 9000-1:1994,Quality
management and quality
assurance standards - Part 1: Guidelines for selection
anduse
IS0 9000-2: 1997, Quality management and quality
assurance standards - Part 2: Generic guidelines
for the application of IS0 9001, IS0 9002, and
IS0 9003
IS0 9000-3: 1991, Quality management and quality
assurance standards - Part 3: Guidelines for the
application of IS0 9001 to the development, supply,
and maintenance of software
IS0 9001: 1994, Quality systems - Model for quality
assurance in design, development, production, installation, and servicing
assurance in production and servicing
assurance in final inspection and test
Publisher: International Organization for Standardization, 1 me de Varemb, Case postale 56, CH-1 121
Genve 20, SwitzerlandSuisse
ASME B1.20.1-1983 (R1992), Pipe Threads, General

Purpose (Inch)'
ASME B36.10M-1996, Welded and Seamless Wrought
Steel Pipel
Publisher: American Society of Mechanical Engineers,

Three ParkAvenue, New York, NY 10016-5990;
Order Department: 22 Law Drive, Box 2300, Fairfeld,
NJ 07007-2300
ASTM A 153JA 153M-95, Specification for Zinc Coating (Hot-Dip) onIronand

Steel Hardware
ASTM B 633-85(R1994),SpecificationforElectrodeposited Coatings of Zinc onIronand Steel
ASTM B 766-86(R1993),SpecificationforElectrodeposited Coatings of Cadmium onSteel
ASTM A 197-87 (R1992), Specification for Cupola
Malleable Iron
MSS SP-25-1998, Standard Marking System for Valves,

Fittings, Flanges, and Unions
Publisher: Manufacturers Standardization Society of the
Valve and Fittings Industry, 127Park Street, NE,
Vienna, VA 22180
' May also be obtained from American National StandardsInstitute

(ANSI), I l West 42nd Street, New York, NY 10036.
7
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ANNEX A
METRIC (SI) TABLES
(This Annex is a nonmandatory part of ASME 816.39-1998 and is included for informational purposes only.)
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Tables A l through A5 present themetricvalues

comparable tothe customary valuesshownin
Tables
1 through 5. The metric dimensions shown in Tables
A3 through A5 are for informationand reference, and
are not exact equivalents of the dimensions in Tables
3 through 5 . If used by agreement between the manufacturer and the purchaser, complete dimensional interchangeability withstandard components cannot be assured. Use of a combination of customary andmetric
valuesis contrary to the intent of this Standard.
9
TABLE A l
PRESSURE-TEMPERATURE
RATINGS
Pressure, bar
Temperature,
"C
Class 150
Unions
Class 250
unions
Class 300
Unions
-29 to 66
1O0
125
150
20.7
17.5
15.2
12.9
34.5
30.6
27.7
24.8
41.4
37.5
34.6
31.7
175
200
225
232
10.6
8:2
5.9
5.2
22.0
19.1
16.2
28.9
26.0
23.1
13.4
10.5
9.0
20.3
17.4
15.9
2 50
275
288
...
...
GENERAL NOTES:
(a) 1 bar = 14.5 Dsi = 100 kPa
"F - 32
(b) "C = 1.8
TABLE A2 TENSILESTRENGTH OF UNIONS

Ultimate Load, kN
17.8
26.7
11.1 '18
16.9 Y4
177.9
222.4
Class 300
23.6
Y4
1
1'14
1'12
80.1 68.9
94.7
114.8
68.9
94.7
114.8
102.3
124.5
133.4
177.9
177.9
222.4
333.6
489.3
18
133.4
Class 250
11.1
16.9
35.623.6
34.2
47.1
44.5
62.3
Class 150
34.2
47.1
72
2
244.6 2 '/2
3
4
155.7
155.7
GENERAL NOTE: 1 N = 0.2248 Ibf
IO
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Nominal
Pipe Size
Head or fel
Part
Union nut
Tail or male y
part
6 min.
across flats
Alternate
Design
TABLE A3 SI DIMENSIONS OF CLASS 150

Nominal
Pipe Size
A,
Min. Min.
5.5
9.0
13.0
15.5
20.5
'18
'14
"*
5;
"4
1
1
1'/2
v4
70.0
86.5
51.5
2
2
82.0
3
4
98.0
'/*
27.5
52.5
25.5
33.5
71.5 39.5
104.5
120.5
152.5
60.5
76.0
102.5
B.
C.
Min.
D,
Min.
23.5
28.0
32.0
37.0
43.5
32.0
36.5
41.O
43.5
49.5
7.5
8.0
9.0
11.0
12.5
52.5
63.5
17.0
14.5
57.5
61.O
18.0
89.0
23.5
25.0
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GENERAL NOTE: Dimensions are in millimeters.

Head or female
Alternate
Design
Nominal
Pipe Size
A.
Min.
B.
Min.
C.
Min.
0,
Min.
23.5
28.5
32.0
37.0
43.5
5.5
7.5
10.5
13.5
19.0
32.0
39.5
43.5
46.0
52.5
7.5
11.0
12.0
14.5
16.5
52.5
1
1 l/4 65.5
11/2 73.5
24.0
32.5
38.0
58.5
66.5
70.5
19.0
21.5
22.0
2
88.5
49.0
105.5 59.0
272
126.0 73.5
3
4
164.5 97.0
79.5
89.5
97.5
111.5
25.5
29.5
31.0
34.0
GENERAL NOTE: Dimensions are in millimeters.
12
--`,,```````,,`,``,`,,`,```,-`-`,,`,,`,`,,`---
TABLE A4 SI DIMENSIONS OF CLASS 250

--`,,```````,,`,``,`,,`,```,-`-`,,`,,`,`,,`---
8 min.
Lacross flats
Alternate
Design
TABLEA5 SI DIMENSIONS OF CLASS 300

~ _ _ _ _ _
Nominal
Min.Pipe
Min.
Size Min.
B.
A,
Min.
~~
23.5
'18
5.5
7.5
10.5
13.5
19.0
'14
38.0
"8
?;
"4
1
1'/4
1
'/*
2
2'/2
3
4
76.5
83.5
c,
D,
32.0
39.5
43.5
46.0
54.0
7.5
11.0
12.0
14.5
16.5
~~
34.0
44.5
54.5
24.0
32.5
38.0
63.0
58.5
67.5
72.5
19.0
21.5
22.0
49.0
59.0
73.5
97.0
100.5
120.0
136.5
178.0
82.0
84.5
104.0
113.5
25.5
29.5
31.O
34.0
GENERAL NOTE: Dimensions are i n millimeters.
13

ANNEX B
QUALITY SYSTEM PROGRAM
(This Annex is a
nonmandatory part of ASME 816.39-1998 and is included for informational purposes only.)
The products manufactured in accordance with this

Standard shallbeproducedunder
a qualitysystem
program following the principles of an appropriate
standard from the I S 0 9000 series. A determination
of theneed for registration andor certification of the
product manufacturers quality systemprogram byan
independent organization shall be the responsibility of
the manufacturer. Detailed documentation demonstrating
program compliance shall be available to the purchaser
at the manufacturers facility. A written, summarized
description of the program used by the product manufacturer shall be available to the purchaser upon request.
The product manufacturer is defined as the entity whose
name or trademark appears on the product in accordance
with the marking or identification requirements of this
Standard.
The series
is also available from theAmericanNationalStandards

Institute (ANSI) andtheAmerican
Society for Quality (ASQ) as
AmericanNational Standards thatare identified by a prefix Q
replacing theprefix ISO. Eachstandard of the series is listed
in Annex 1.
15
--`,,```````,,`,``,`,,`,```,-`-`,,`,,`,`,,`---

Scheme for the Identification ofPiping Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.A13. 1.1996
61.20.1-1983(R1992)
Pipe Threads, General Purpose (Inch) .............................................................
61.20.3-1976(R1991)
Dryseal Pipe Threads (Inch)......................................................................
Cast Iron Pipe Flanges and Flanged Fittings ............................................................... .616. 1.1989
Malleable Iron Threaded Fittings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ,616.3-1992
GraylronThreaded Fittings ............................................................................... 616.4-1992
.616. 5.1996
Pipe Flanges and Flanged Fittings (NPS '/2 Through NPS 24) ................................................
.616. 9.1993
Factory-Made Wrought Steel Buttwelding Fittings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.616.10.1992
Face-to-Face and End-to-End Dimensions of Valves .......................................................
Forged Fittings, Socket-Welding and Threaded. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .616.1 1.1996
CastlronThreaded Drainage Fittings ..................................................................... 616.12-1991
.616.1 4.1991
Ferrous Pipe Plugs, Bushings, and Locknuts with Pipe Threads .............................................
.B16.1 5.1985(R1994)
Cast Bronze Threaded Fittings, Classes 125 and 250 ................................................
Cast Copper Alloy Solder Joint Pressure Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.616.1 8.1984(R1994)
.616.2 0.1993
Metallic Gaskets for Pipe Flanges - Ring.Joint, Spiral.Wound, and Jacketed.................................
Nonmetallic Flat Gaskets for Pipe Flanges................................................................ .616.2 1.1992
Wrought Copper andCopper Alloy Solder Joint Pressure Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.B16.2 2.1995
- DWV .................................................. .B16.23.1992
Cast Copper Alloy Solder Joint Drainage Fittings
Cast Copper Alloy Pipe Flanges and Flanged Fittings, Class 150, 300, 400, 600, 900, 1500, and 2500 . . . . . . . . . . . . .B16.2 4.1991
Buttwelding Ends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
616.25.1992
,616.26-1988
Cast Copper Alloy Fittings for Flared Copper Tubes .......................................................
.616.28.1994
Wrought Steel Buttwelding Short Radius Elbows and Returns ..............................................
,816.29-1994
Wrought Copper and Wrought Copper AlloySolder Joint Drainage Fittings - DWV ..........................
Cast Copper Alloy Solder Joint Fittings for Sovent Drainage Systems.......................................
.616.32.1992
Manually Operated Metallic Gas Valves for Use in Gas Piping Systems up to 125 psig
(Sizes Through 2) ...............................................................................
.616.3 3.1990
Valves - Flanged, Threaded, and Welding End...........................................................
.616.34.1996
616.36-1996
OrificeFlanges .........................................................................................
Large Metallic Valves for Gas Distribution (Manually Operated, NPS 2'/2 to 12, 125 psig Maximum) . . . . . . 616.38-1985(R1994)
Malleable Iron ThreadedPipe Unions ....................................................................
.616.3 9.1998
Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems . . . . . . . . . . . . . . . . 616.40-1985(!31994)
Functional Qualification Requirements for Power Operated ActiveValve Assemblies
.616.4 1.1983(R1989)
for Nuclear Power Plants ....................................................................
.616.42.1987
Ductile Iron Pipe Flanges and Flanged Fittings, Classes 150 and 300 ........................................
,816.44-1995
Manually Operated Metallic Gas Valves for Use in House Piping Systems ...................................
Cast Iron Fittings for Sovent@
Drainage Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.B16.4 5.1987
,816.47-1996
Large Diameter Steel Flanges (NPS 26 Through NPS 60) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steel LineBlanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 616.48-1997
Power Piping............................................................................................
631.1-1995
.631. 2.1968
Fuel Gas Piping (not an ANSI standard) ...................................................................
Process Piping .......................................................................................... 631.3-1996
.................................. ,631.4-1992
Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids
Refrigeration Piping......................................................................................
631.5-1992
.B31.8.1995
Gas Transmission and Distribution Piping Systems.........................................................
Building Services Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B31.9.1988
Slurry Transportation Piping Systems
....................................................................
.B31.1 1.1989
631G-1991
Manual for Determining the RemainingStrength of Corroded Pipelines .......................................
636.10M-1995
Welded and Seamless Wrought Steel Pipe ..............................................................
StainlessSteel Pipe ............................................................................
636.19M-l985(R1994)
............
Self-operated
and
Power-Operated
Safety-Related
Valves
Functional
Specification
Standard
.N278.
1.1975(R1992)
'/*
The ASME Publications Catalog shows a complete list of all the Standards published by the Society. For a complimentary
catalog. or the latest information about our publications. call 7-800-THE-ASME (7.800.843.2763).

--`,,```````,,`,``,`,,`,```,-`-`,,`,,`,`,,`---
AMERICAN NATIONAL STANDARDS FOR PIPING.

PIPE FLANGES. FITTINGS. AND VALVES

Asme B16.39-1998

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Copyright ASME International

The American Society of

(Revision 01 ASMVANSI B16.39-1886)

Copyright ASME International

Date of Issuance: December 31, 1998

The 1998 edition of thisStandard is being issued with an automatic addenda

ASME issues written replies to inquiries concerning interpretationsof

ASME is the registered trademark of The American Society of Mechanical Engineers.

This code or standard was

No part of this document may be reproduced i n any form,

The American Society of Mechanical Engineers

Copyright ASME International

(This Foreword is not part of ASME B16.39-1998.)

Copyright ASME International

ASME B16 COMMITTEE

- THREADED FITTINGS (EXCEPT STEEL)

H. R. Sonderegger, Chair, Grinnell Corp., Cranston, Rhode Island

Copyright ASME International

Copyright ASME International

MALLEABLE IRON THREADED PIPE UNIONS

copper, or copper alloy. The threaded ends shall be

Pressure-temperature ratings for these unions are

The sizes of unions shown in the tables are identified

U.S. customary units are the standard. Metric units

1.3 Quality Systems

Copyright ASME International

(a) The mechanical properties of the malleable iron

Classes 150,250,and 300

MALLEABLE IRON THREADED PIPE UNIONS

TABLE 2 TENSILE STRENGTH OF UNIONS

Ultimate Load, Ibf

GENERAL NOTE:Ultimate loads in metric (SI) units are shown

8 THREADING OF PIPE ENDS

Copyright ASME International

MALLEABLE IRON THREADED PIPE UNIONS

13.2 Steel Unions

Dimensions in inches are given in Tables 3 through

TABLE 3 DIMENSIONS OF CLASS 150

GENERAL NOTE: Dimensions are in inches.

Copyright ASME International

MALLEABLE IRON THREADED PIPE UNIONS

GENERAL NOTE: Dimensions are in inches.

TABLE 4 DIMENSIONS OF CLASS 250

TABLE 5 DIMENSIONS OF CLASS 300

GENERAL NOTE: Dimensions are in inches.

MALLEABLE IRON THREADED PIPE UNIONS

The following is a list of publications referenced in

Publisher: American Society for Testing and Materials,

ASME B1.20.1-1983 (R1992), Pipe Threads, General

Publisher: American Society of Mechanical Engineers,

ASTM A 153JA 153M-95, Specification for Zinc Coating (Hot-Dip) onIronand

MSS SP-25-1998, Standard Marking System for Valves,

' May also be obtained from American National StandardsInstitute

Copyright ASME International

Tables A l through A5 present themetricvalues

TABLE A2 TENSILESTRENGTH OF UNIONS

GENERAL NOTE: 1 N = 0.2248 Ibf

TABLE A3 SI DIMENSIONS OF CLASS 150