The Compact Flange System® is a fully proven alternative to the conventional
flanged connection used throughout the oil, gas, petrochemical and power generation
industries. Produced in a comprehensive range of sizes and materials, they offer
versatility, compactness, weight saving and cost effectiveness in connecting piping system.
Standard pressure classes, sizes and flange types
A full range of compact flanges – equivalent to or with higher rating than ASME flanges are readily available.
The Compact Flange covers the usual range of nominal pipe size from ½” to 42”. It is also available,
as standard, in sizes from 26” to 42” for Class 1500, from 14” to 24” for Class 2500 and from ½” to 20”
for Class 4500.
The Compact Flange is available as standard, with the following flange types: weld neck flange, blind flange,
swivel flange, integral (equipment) flange, rigid interface and line blanks. Orifice flanges, restriction orifices
and drip rings are also available on request.
The integral (valve) flange neck outside diameter fulfils the minimum wall thickness requirements given in
ASME B16.34, Table 3 with the inside diameter given in ASME B167.34, Table A1.
Access is made for torque tool with standard sockets in order to allow for valve-to-valve make up.
The envelope for CL600 to CL1500 up to 24” and CL2500 up to 12” is within the ANSI flange envelope. This means that standard flange castings “former” can
be used without any modification. Major valve manufactures covering ball, gate, globe, choke and plug valves, have confirmed that they can use the integral
compact flange on their valves.