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ABOUT HAMMER WING UNIONS
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Look to
as "The Source."
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Revised:
05/14/2012
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Website Tools
Index
2" Figure Number
602, 1002,
and 1502
Hammer Wing Union Identification Tool
(To Identify Male and Female Union Halves,
Click Here)
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If operators
attempt to join the male half of a 2" Fig. 1502 union (nut half) to
the female half (threaded half) of a 2" Fig 602 or a 2" Fig. 1002
union, only a partial engagement of the threads will occur.
No greater hazard exists
with oilfield pressure control equipment than mismatched hammer
wing unions. Union manufacturers and user groups have posted various warnings
about this problem online. You can find these warnings by an
internet search for "warnings about joining 2" 602, 1002, and 1502
unions".
Unions other than 2” 602, 1002 and 1502 may also
seem to connect, yet still present a hazardous situation. Do not
assume any union connection safe unless you can identify
both connecting halves as identical in size, figure number or other
designation, and working pressure.
This problem will not occur if operators identify
their unions and avoid any attempt to join them inappropriately.
To aid in identification of the most
common unions,
and avoid any possibility of union mismatch, WOODCO USA has
available, union identification tools for 2" Fig.
602 / 1002 unions and 2"
Fig.
1502 unions (2" Fig. 602 and 2" Fig. 1002 unions have
identical dimensions).
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See the usage illustrations below. You will see a 2" Fig. 1502
union identification tool shown fitted to union profiles. A close
fit of the tool faces to the union profile features, identifies the
union geometry.
Identification of geometry only, requires that
operators assume the lowest working pressure for that geometry
(reference table below).
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| UNION SIZE AND FIGURE NUMBER |
WORKING PRESSURE FOR STANDARD SERVICE |
WORKING PRESSURE FOR SOUR SERVICE |
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2" 602*
2" 1002*
2" 1502
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6,000 psi
10,000
psi
15,000
psi
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6,000
psi
7,500
psi
10,000
psi
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2" 602
AND 2" 1002 UNIONS HAVE IDENTICAL GEOMETRY (DIMENSIONS), BUT
DIFFERENT WORKING PRESSURES. IN THE ABSENCE OF CLEARLY
READABLE MARKING, ALWAYS CONSIDER UNIONS OF THIS GEOMETRY AS
FIG. 602, 6,000 PSI WORKING PRESSURE. |
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Further identification as to Fig. 602, Fig. 1002, or Fig. 1502, standard or sour
service, and corresponding working pressures, requires the discovery
and reading of the manufacturers original marks. We recommend that
operators not connect unions that do not display marking indicating
the same figure # designation and working pressure on each
connecting half.
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Instructions For Hammer Wing Union Identification Tool
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For a PDF version of the following instructions, click here. |
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WOODCO USA provides these tools for identification, estimating, and
reference only. Do not use them for manufacturing or inspection.
Users of these tools should not use them as a sole means of Union
identification. Anyone making use of these tools does so at his own
risk and assumes any and all liability resulting from such use. |
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| FIT THE MALE EXTENSION OF THE IDENTIFICATION TOOL INTO
THE NUT ON THE MALE UNION HALF TO CONFIRM SIZE |
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| FIT THE THREADED PROFILE ON THE IDENTIFICATION TOOL INTO
THE THREADS OF THE NUT
ON THE MALE UNION HALF
TO CONFIRM THREAD COUNT AND FORM |
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| FIT THE FEMALE INDENTION OF THE
IDENTIFICATION TOOL OVER THE EXTERNAL THREADS OF THE FEMALE
UNION HALF
TO CONFIRM SIZE |
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| FIT THE THREADED PROFILE ON THE IDENTIFICATION TOOL INTO THE THREADS OF THE FEMALE UNION HALF TO CONFIRM THREAD
COUNT AND FORM |
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If operators find they must connect a male 2"
fig. 1502 to a female 2" fig. 602 or 1002 union, an adapter as shown
below, will safely accomplish the connection. The adapter may have
10,000 psi WP for standard service or have 7,500 psi WP for sour
service when attached to 2" fig. 1002, or 6,000 psi WP when attached
to 2" fig. 602.
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Click
here to view the WOODCO USA Catalog for Pressure Control Equipment.
Click here for more
information about current efforts to create an API Standard for
Figure # Hammer Unions.
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Email this page
to a friend or colleague.
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Information above, and in other
parts of this Web Site, may help persons who really seek to know. If you
have a question, and you think WOODCO USA may have the capacity to answer
it, please use our
Contact Us link and give us a
chance to help.
WOODCO USA
provides Web Site Tools for identification, estimating, and reference only. Do
not use this information for manufacturing or inspection. Users of these tools
should not use them as a substitute for professional engineering advice.
Anyone making use of the information presented does so at his own risk and
assumes any and all liability resulting from such use.
FOR FURTHER INFORMATION, OR TO LEARN MORE ABOUT WOODCO
USA PRODUCTS AND SERVICES,
CONTACT:
WOODCO USA
P.O. Box 1261
Houston, Texas 77251-1261
Phone: 713-672-9491
USA and Canada: 1-800-496-6326
Fax: 713-672-8768
www.woodcousa.com
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