Flanges

Slip-On Flanges

A Slip On flange is designed to accept a pipe into its bore, with the flange face extending from the end of the pipe by enough distance to apply a weld bead on the inside diameter. A second weld is generally made between the pipe OD and flange hub. For tips on how to properly…
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Threaded Flanges

Threaded, or Companion flanges, have a female NPT center for connection to a male NPT pipe end. Make the connection by simply screwing the threaded pipe into the Threaded flange. The main advantage of using Threaded flanges is that they can be quickly attached without welding, although sometimes a weld is also used to permanently…
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Blind Flanges

Designed to cap off the ends of a line, valve, or pressure vessel opening, a Blind flange has no bore. Because there is no bore, Blinds are well-suited to withstand bending stress from high pressure and temperature applications without failure. They’re often altered with bores and NPT threads for custom applications as well. Like all…
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Socket Weld Flanges

Socket Weld flanges are designed to accept a pipe into a socket, then welded between flange hub and pipe OD. Sometimes referred to as Counter Bore flanges, Socket Weld flanges were originally developed for use on small, high pressure piping systems. Today, they’re widely used in applications where spatial limitations exist. According to ASME B31.1,…
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Lap Joint Flanges

Lap Joint flanges are used in conjunction with a Stub End, which fits through the bore of the flange and is secured to the pipe via weld. Sometimes referred to as a Backing flange, the Lap Joint flange is free to rotate around the stub end, which ensures there will be no issues with bolt…
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Orifice Flanges

Orifice flanges, which come in pairs, are a single component of an Orifice flange union assembly. The Orifice flange union is composed of two Orifice flanges, an Orifice plate, bolts, nuts, jack screws and two gaskets. Used for measuring the volumetric flow rate of liquids and gases through a pipeline, Orifice flanges come with a…
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James Duva, Inc. supplies a wide variety of standard ANSI flanges that are durable, reliable, affordable, and meet all specifications required for your job. We have a vast inventory available for quick delivery, in quantities large and small, and are committed to setting the standard in customer service.

James Duva, Inc. partners with custom flange manufacturers in a wide range of specialty, and can have virtually any flange manufactured to meet your specification. We do this regularly for our top clients.

Whether you need a standard flange from stock, or a custom flange made to your specification, call us
today.

Manufacturers

Full Selection of Domestic & Import

Range

1/2” thru 36” NPS

150# thru 2500#

Raised & Flat Face

Type

Blind
Lap Joint
Orifice
Slip-On
Socket Weld
Threaded

B.W. Fittings Specifications

Specs.
A403 A774
A403 A774
A403 A774
A403 A774
A403 A774
A403 A774
A403 A774
A403
A815
A815
B366
B366
B361
B366
B366
B366
B366
B366
B366
B366