What Is an Integral Ring Flange?

An integral ring flange is a flange that features a precision-machined groove on its sealing face, designed to accept a metal ring gasket. When two RTJ flanges are bolted together, the ring gasket is compressed into the grooves, creating a metal-to-metal seal. Unlike soft gaskets that can extrude or deteriorate, the metal ring gasket used with this type of flange withstands extreme pressures and temperatures.

The flange is characterized by its machined ring groove, solid construction, and robust design. Typical features include a precision-machined groove (style R, RX, or BX) on the sealing face, a solid flange body without a raised face, pre-drilled bolt holes on a standardized bolt circle, forged construction for high strength, and lifting lugs on larger sizes. Sizes typically range from 1/2 inch to 48 inches, with pressure classes from 150 to 2500. This component provides reliable sealing in the most demanding service conditions.

Why Choose Custom CNC Machined Integral Ring Flanges?

Off-the-shelf integral ring flanges may not always fit your specific application. Standard sizes, materials, or groove styles may not align with your system requirements. Custom CNC machined versions provide the perfect solution for critical sealing applications.

With CNC machining, every aspect of the flange can be customized. The size can be matched to your pipe diameter. The material can be selected for temperature and corrosion resistance. The pressure class can be specified for your operating conditions. The groove style can be chosen for your specific sealing requirements.

Our CNC machining process ensures that each flange achieves tight tolerances, with excellent surface finish and consistent quality across every part.

Materials for Custom Integral Ring Flanges:

The choice of material for an integral ring flange depends on operating temperature, pressure, and fluid compatibility.

Carbon Steel is the most common material for this type of flange. Grade A105 is standard for high-temperature service, while A350 LF2 is used for low-temperature applications.

Stainless Steel provides superior corrosion resistance. Grades 304, 304L, 316, and 316L are common for chemical, food, and marine environments.

Alloy Steel offers high strength and high-temperature capability. Grades F11, F22, and F91 are used in power generation and petrochemical plants.

Duplex Steel provides excellent corrosion resistance and high strength. Grades F51, F53, and F55 are used in offshore and marine environments.

Customization Options:

When you order custom integral ring flanges from our CNC shop, you can specify virtually every dimension and feature.

Size can be customized from 1/2 inch to 48 inches to match your pipe diameter.

Pressure Class can be specified from 150 to 2500 to meet your operating conditions.

Groove Style can be selected from Style R, RX, or BX based on your sealing requirements.

Material can be chosen from carbon steel, stainless steel, alloy steel, or duplex steel.

Face Finish can be specified for optimal gasket seating.

Applications of Custom Integral Ring Flanges:

Oil and Gas:

Integral ring flanges seal wellhead connections, manifold piping, and pipeline ends in high-pressure gas and oil services.

Petrochemical:

Integral ring flanges connect reactors, columns, and high-pressure piping in chemical processing plants.

Power Generation:

Integral ring flanges seal steam lines, boiler connections, and turbine nozzles in power plants.

Refining:

Integral ring flanges are used in high-temperature, high-pressure hydrotreater and reformer circuits.

Offshore Platforms:

Integral ring flanges with duplex steel construction resist chloride stress corrosion cracking.

Our CNC Machining Capabilities:

Our facility is equipped with advanced CNC machining centers capable of producing integral ring flanges to the highest standards. We offer precision turning, milling, and groove cutting services. Our quality control includes dimensional inspection, groove verification, and pressure testing.

Why Choose Us for Custom Integral Ring Flanges?

As a dedicated CNC custom metal parts manufacturer, we understand that every sealing application has unique requirements. We work with you to engineer and machine the exact integral ring flange your project needs. With expertise in carbon steel, stainless steel, alloy steel, and duplex steel, we offer sizes from 1/2 to 48 inches and pressure classes 150 to 2500 LB. We support any quantity, from prototypes to high-volume production, with rigorous quality control and fast turnaround. Choose us for precision, reliability, and custom solutions tailored to your application.

Frequently Asked Questions:

Q: What is an integral ring flange used for?
A: An integral ring flange provides metal-to-metal sealing for high-pressure, high-temperature piping connections using a metal ring gasket.

Q: What materials are these flanges made from?
A: These flanges are made from carbon steel, stainless steel, alloy steel, or duplex steel. Material selection depends on temperature and corrosion requirements.

Q: What are the different groove styles?
A: The three main groove styles are Style R (standard), Style RX (pressure-energized), and Style BX (very high pressure).

Q: What pressure classes are available?
A: We offer pressure classes from 150 to 2500, depending on your application requirements.

Q: What sizes can you produce?
A: We can produce sizes from 1/2 inch to 48 inches to match your pipe diameter.

Conclusion:

An integral ring flange is a critical component for high-pressure sealing applications. When off-the-shelf options do not meet your needs, custom CNC machined integral ring flanges provide the perfect solution.