These pipe flanges attach by welding the pipe to the neck of the flange. This transfers stress from the flange to the pipe instead. It also reduces the stress concentration from the base of the hub. Weld neck flanges are often used for applications where high pressure is a factor. The inside diameter of the flange is designed to match the pipe's inside diameter. Weld Neck Pipe flanges with a hub have published specifications that range from 1/2" thru 96". Our company provides these in all material grades, specifications and sizes.
Weld neck pipe flanges are typically provided with a raised face, flat face, or RTJ facing. When a raised face is necessary for weld neck pipe flanges, the standard height is 1/16" for weld neck pipe flanges under 400#. For weld neck pipe flanges of 400# and up, the standard weld neck pipe flange raised face height is 1/4".
liberty Flange manufactures weld neck pipe flanges in all steel material grades, including carbon weld neck pipe flanges, stainless steel weld neck pipe flanges and alloy weld neck pipe flanges.Liberty Flanges also manufactures custom weld neck pipe flanges per customer requirements. Weld neck pipe flanges in stock include ANSI B16.5 weld neck pipe flanges, ASME B16.47 Series "A" weld neck pipe flanges, ASME B16.47 Series "B" weld neck pipe flanges, Pressure Vessel weld neck pipe flanges.
We provides ASME Code and Non Code Industrial weld neck flanges for the Petrochemical, Process, & Waterworks industries. ANSI, API, AWWA pipe flanges in carbon, stainless, alloys and chrome steel. Weld Neck, Slip on, Blind, Threaded, socket weld, Lap Joint, Orifice Flanges in sizes 1/2" to 198".
These flanges are similar in almost every aspect to their respective flanges, except that they have holes in the side of the flange perpendicular to the bolt holes. These holes act as instrumentation outlets for such things as pressure gauges, flow speedometers, and the like. These holes can be threaded or socket, in a variety of sizes. Another smaller hole is made among the bolt hole pattern to accommodate a jack screw to assist in separating the flanges after installation. Orifice flanges come in weldneck slip-on, and threaded types.
Our slip-on flanges are available with raised, flat, or RTJ faces