WOODCO USA intends the image above to resolve any
confusion in communication that might occur when specifying
equipment that may have a male or female, 602, 1002, 1502, or 2202
hammer union half as a connector.
Since the female half has an external thread
commonly recognized as a male thread, while the male half has a nut
with an internal thread commonly recognized as a female thread,
mistakes often occur in describing male and female halves of hammer
The terms male and female apply to the design of
union sealing surfaces. The nose of the male union half fits into
the inward taper of the female union half. The nut secured to the
male union half screws onto the external threads of the female union
half to achieve connection of the two halves, and striking the wings
of the nut with a hammer provides the force to tighten the
connection to achieve a seal.
Firm intimate contact of the male union half nose
with the taper of the female union half provides a primary metal to
metal seal. For popular unions used in the oil field, a secondary
elastomeric seal serves as a
backup to the primary seal.
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
This problem will not occur if operators positively identify
these unions and avoid any attempt to join them inappropriately.
To aid in positive identification of these unions,
and avoid any possibility of union mismatch, WOODCO USA has
available, union identification tools for 2" Fig.
602 / 1002 unions, and 2"
1502 unions (2" Fig. 602 and 2" Fig. 1002 unions have
identical dimensions). To find out more about
these tools, click here.
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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we put into this web site goes into every product we sell. If this Web Site
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