Standard Forged Flanges

All Metals & Forge Group supplies a wide range of quality industrial forged steel pressure flanges and fittings including slip-on flanges, socket weld flanges, blind flanges and other shapes for applications in the oil, gas, chemical, wind, pharmaceutical and other industries, manufactured in accordance with ASTM, ANSI, ASME, API and other engineering standards.

Flanges are used for connecting pipes, valves, pumps and other equipment to form a pipework system. They provide easy access for cleaning, inspection, modification or repairs. Flanges are usually welded onto pipes or screwed onto a threaded pipe end and then joined with bolts to make the connection. The types of flanges are described and shown below:

Weld Neck Ring Flange (WNRF) Weld neck flanges are circumferentially welded at the neck where the integrity of the butt welded area can be easily examined by radiography. The bores of both pipe and flange match, which reduces turbulence and erosion inside the pipeline. The weld neck is therefore durable in critical applications
Slip-On Ring Flange (SORF) Slip-on flanges are fitted over the pipe and then fillet welded. Slip-on flanges are easy to use in fabricated applications.
Blind Ring Flange (BLRF) Blind flanges are used to blank off pipelines, valves and pumps. They can also be used as an inspection cover. It is sometimes referred to as a blanking flange.
Socket Weld Ring Flange (SWRF) Socket weld ring flanges are counter-bored to accept the pipe before being fillet welded. The bore of the pipe and flange are both the same to provide good flow characteristics.
Threaded Ring Flange Threaded flange are referred to as either threaded or screwed. They are used to connect other threaded components in low pressure, non-critical applications. No welding is required.
Lap Joint Ring Flange (LJRF) Lap joint flanges are always used with either a stub end or taft which is butt welded to the pipe with the flange loose behind it. This means the stub end or taft always makes the face. A lap joint is used in low pressure applications because it is easily assembled and aligned. To reduce costs, these flanges are supplied without a hub.
Ring Type Joint (RTJF) Ring type joint flanges are used to ensure a leak proof flange connection at high pressures. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal. This jointing method can be employed on Weld Neck, Slip-on and Blind Flanges.

Materials, classes and types manufactured by All Metals & Forge Group include:

Carbon Steel Flanges: ASTM A-105, ASTM A 694: F42, F48, F52, F60, F65, F70

LTCS Flanges: A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A516 GR.70

Alloy Steel Flanges: ASTM A-182: F5, F9, F11, F12, F21, F22, F91, A694 Gr 52, 60, 65, 70, AISI 4130, 4140

Stainless Steel Flanges: ASTM A 240/182 F - 304/304H/304L, 316/316H/316Ti, 309, 310, 317L, 321, 347, 904L

Duplex Steel Flanges: ASTM A182: F51, F53, F55 

Monel & Nickel Flanges: UNS N04400, N05500, N02200, N02201

Inconel Flanges: UNS N0600, N06601, N06625, N07718, N08800, N08810, N08825

Hastelloy Flanges: UNS N10276, N06022, N10665, N06455, Alloy 20

Pressure ANSI Class: 150#, 300#, 600#, 900#, 1500# & 2500#

Types: Weld Neck Ring Flange (WNRF), Socket Weld Ring Flange (SWRF), Slip-On Ring Flange (SORF), Blind Ring Flange (BLRF), Screwed (Threaded) Long Weld Neck Ring Flange (LWNRF), Lapped Joint, Reducing, Spectacle Blind, Wide Neck Ring Type Joint (WNRTJ), Blind Neck Ring Type Joint (BLRTJ)

AM&FG manufacturing standards include: ASME B 16.5, ASME B 16.47, API 6A

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