Titanium Flanges Types
May 29, 2019
Slip-On Flanges
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.
Blind Flanges
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.
Weld-Neck Flanges
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.
Threaded Flanges
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.
Lap-Joint Flanges
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.
