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Catalog for WOODCO USA Pressure Control Equipment, Sup. 3 |
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Page 15 |
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WOODCO USA presents this
catalog to gain your attention and secure your business |
Phone: 713-672-9491
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2.4 Ring Gasket Profile
Designs Illustrated and Explained (continued)
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SRX type ring gaskets
have dimensions identical to RX type ring gaskets. SRX
type ring gaskets have a special "vent" hole allowing
the under water assembly of flanges. This "vent" hole
permits water trapped behind the ring gasket to escape
into the assembled equipment bore. All RX gasket sizes
may accept modification to the SRX design to facilitate
under water assembly of flanges, or retightening should
a flange connection leak on first test. |
SRX TYPE
PRESSURE ENERGIZED SUBSEA RING
GASKET |
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BX type ring gaskets fit
only API flanges designated as 6BX specified in API Spec
6A or 17D flanges specified in Spec 17D. Flanges that
utilize BX type ring gaskets have designs that allow
face to face contact of the made-up flange connection. |
BX TYPE
PRESSURE ENERGIZED RING GASKET |
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SBX type ring gaskets
have dimensions identical to BX type ring gaskets. SBX
type ring gaskets have a special "vent" hole allowing
the under water assembly of flanges. This "vent" hole
permits water trapped behind the ring gasket to escape
into the assembled equipment bore. |
SBX TYPE
PRESSURE ENERGIZED SUBSEA RING
GASKET |
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API product specification levels (PSL's) do not apply to ring gaskets. All
ring gaskets marked as in Table 2 below, and bearing the API Monogram,
have application for PSL's 1, 2, 3, and 4 with no distiction. They may have
forged, centrifical cast, or rolled and welded construction.
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Table 2 Ring Gasket Material and Marking.
| Material |
Maximum Hardness |
Mark |
| Soft Iron |
56 HRB |
D-4* |
| Carbon and low-alloy steel |
68 HRB |
S-4* |
| 304 stainless steel |
83 HRB |
S304-4 |
| 316 stainless steel |
83 HRB |
S316-4 |
| Nickel alloy UNS N08825 |
92 HRB |
825-4 |
| Other CRA materials |
Hardness shall meet manufacturer's written specification. |
UNS number-4 |
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Carbon steel gaskets may meet the requirements of
soft iron and may have dual marking D-4 / S-4. |
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