BS 7796:1995 Specification for hydraulic fluid power. Four-screw split-flange connections for use at pressures of 2,5 MPa to 40 MPa (25 bar to 400 bar). Type 1 metric series and type 11 inch series
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This International Standard gives complete general
and dimensional specifications for flanged heads and
split-flange clamp halves applicable to four-screw,
split-flange type tube and hose connections for use
at pressures of 2,5 MPa to 40 MPa (25 bar to
400 bar).
For flange connections, a minimum design factor of
2,5 is valid with screws of property class 8.8, not in-
cluding weld joints, for which special instructions ex-
ist. The design factor of the flange may be increased
to 3,5 or better by using flange-head screws of prop-
erty class 10.9 (see ISO 898-1).
This International Standard also includes appropriate
references to the O-ring seals and their assembly
components as well as recommended port dimen-
sions and port design considerations.
It also recognizes the need to accommodate metric
screw fasteners as well as to provide a means to
utilize existing inch screw fasteners and, conse-
quently, it provides type I and type Il connections.
These connections are intended for application in hy-
draulic systems, on industrial and commercial prod-
ucts, where it is desired to avoid the use of threaded
connections.
1) 1 bar = 0,1 MPa = 105 Pa; 1 Pa = 1 N/m²
Bontotest Wome ni
2) To be published.
Surges of pressure higher than the nominal rating
will reduce the ability of the flange connections to r
tain the hydraulic fluid and this should be taken in-
account in the design of the hydraulic system.
BS 7796:1995 Specification for hydraulic fluid power. Four-screw split-flange connections for use at pressures of 2,5 MPa to 40 MPa (25 bar to 400 bar). Type 1 metric series and type 11 inch series