Flanges in Titanium Grade 2 – UNS R50400
Flanges in Duplex – UNS S31803 & S32205
Flanges in Super Duplex – UNS S32750 & S32760
Flanges in 6 Moly – UNS S31254, N08925 & N08926
Flanges in Copper Nickel UNS C70600 C70620 C7060X C7150 C71520 C71640
Slipped over pipe and then welded both inside and outside to provide sufficient strength and prevent leakage. Used in preference to weld necks due to lower cost and less accurate requirements when cutting the pipe to length.
Without a bore, the blind flange is used to shut off a piping system or vessel opening. Permits easy access for inspection purposes. Can be supplied with or without hubs at the manufacturer’s option.
Designed to be joined to a piping system with butt welding. Although relatively expensive due to long neck, preferred for high stress applications. The bore of the flange matches the bore of the pipe, reducing turbulence and erosion.
Similar to slip-on but bore is threaded enabling assembly without welding which obviously limits use to relatively low pressure systems. May be welded along joint after assembly, but not considered satisfactory method of increasing applications.
|Socket Weld Flanges
Similar to slip-on in outline but bore is counter-bored to accept pipe with the diameter of the remaining bore the same as the inside diameter of the pipe. Attached to the pipe by a fillet weld around the hub and an optional interval weld can be applied in high stress applications. Often used in high pressure systems such as hydraulics & steam lines.
Similar to slip-on flange, but has a radius at the intersection of the bore and the flange face to accommodate a lap stub end. Face on stub end forms the gasket face of the flange. Used when sections of piping needs to be dismantled quickly and easily for inspection or replacement.
Provides access for metering off gases or liquids. Clamps between a pair of flanges when installed in line and is referred to as an orifice flange union. Jack-screws facilitate removal of orifice plate.
Also called a Figure 8 Blank, the Spectacle Blank is a pressure retaining plate with one solid end and one open end connected with a web or tie-bar. Open end forms seal between two flanges for normal flow of fluid through pipe work, and swinging solid end into position halts flow.
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