/ Special Forged Flanges

Anchor Flange

Dimensions: NPS 2” to 60”, DN50-DN1500, customized sizes available
Material: Carbon Steel, Alloy Steel and Stainless Steel
Thickness: According to pipeline design pressure or customized drawing
Standard: ASME B16.5, ASME B16.47, MSS SP-44, API, EN, DIN, Custom Drawing
Class Range: Class 150 to 2500, PN16 to PN250, customized pressure ratings available
Flange Face Type: RF, FF, RTJ or customized design
End: Bevel end / Weld end
Connection: Butt weld / Pipeline anchoring connection
Manufacturing Process: Forging, Heat Treatment, Machining, Drilling, Inspection

The Anchor Flange is designed to fix and stabilize pipelines by transferring axial loads, pressure thrust, and thermal expansion forces to concrete blocks or structural supports. It provides reliable restraint for buried pipelines, long-distance transmission pipelines, pump stations, valve stations, and high-pressure pipeline systems.

It can be manufactured according to ASME, MSS, API, EN, DIN, and customer drawing requirements, with materials including carbon steel, stainless steel, alloy steel, duplex steel, and special alloys.

Widely used in oil and gas pipelines, water transmission systems, district heating pipelines, chemical plants, power generation, and underground pipeline engineering.
Product Description

Anchor Flange- High-Performance Industrial Connection Solution

Shanxi HongKai Forging Co., Ltd. specializes in manufacturing premium Anchor Flange products" target="_blank">products with integrated production capabilities spanning forging, heat treatment, machining, and comprehensive quality testing. Our enterprise-level solutions feature specifications ranging from DN15 to DN4000, pressure ratings up to Class 2500, and compliance with multiple international standards including ASME B16.5, EN1092-1, and DIN. With three department workplaces and free import-export rights, we provide prevalent channeling association arrangements for requesting mechanical applications worldwide.

What is Anchor Flange

An Anchor Flange is a special pipeline component used to restrain pipe movement and transfer axial forces to a fixed support, concrete block, or structural foundation.

Unlike standard pipe flanges mainly used for bolted connections, anchor flanges are usually welded directly to the pipeline and embedded or fixed into a support structure. They help control thermal expansion, pressure thrust, vibration, and external loads in pipeline systems.

Anchor flanges are commonly used in buried pipelines, long-distance oil and gas transmission lines, water pipelines, district heating systems, pump stations, valve stations, and pipeline crossing projects.

What is Anchor Flange


Anchor Flange Specifications

Standard Type Class / Pressure Rating Size Range Material Options
ASME B16.5 Custom Anchor Flange Class 150-2500 NPS 2”-24” ASTM A105, A182, A350
ASME B16.47 Large Diameter Anchor Flange Class 75-900 NPS 26”-60” Carbon Steel, Alloy Steel
MSS SP-44 Pipeline Anchor Flange Class 150-900 NPS 12”-60” Carbon Steel, Low Alloy Steel
API Design Oil & Gas Anchor Flange Customized Customized API Pipeline Materials
EN / DIN Customized Anchor Flange PN16-PN250 DN50-DN1500 Carbon Steel, Stainless Steel
Custom Drawing Non-standard Anchor Flange Customized Customized Customized Materials
Surface Type RF, FF, RTJ, Plain Face - - -
Coating Black Paint, Anti-rust Oil, FBE, Galvanizing - - -

Additional Specifications:

Structure Type: Single anchor ring, double anchor ring, integral forged anchor flange

End Type: Bevel end, weld end, customized pipe end

Connection Method: Butt welding, embedded anchoring, structural fixing

Coating Options: Anti-rust oil, black paint, FBE coating, epoxy coating, galvanizing

Custom Service: Special OD, ID, thickness, anchor ring width, hub size, and welding bevel available

Specifications


Anchor Flange Materials & Grades

Anchor flanges are available in different materials according to pipeline pressure, temperature, medium, corrosion environment, buried condition, and project design requirements.

Carbon steel anchor flanges are commonly used in oil and gas pipelines, water transmission systems, and general industrial pipeline projects. Alloy steel anchor flanges are suitable for high-pressure and high-temperature conditions. Stainless steel and duplex steel anchor flanges are used in corrosive or special service environments.

Material Grade
Carbon Steel ASTM A105, ASTM A350 LF2, Q235, Q345, S235JR
Pipeline Steel API 5L Gr. B, X42, X52, X60, X65, X70
Alloy Steel ASTM A182 F1, F5, F9, F11, F22, F91
Stainless Steel ASTM A182 F304, 304L, F316, 316L, 321
Duplex Steel F51, F53, F55, S31803, S32205, S32750
Nickel Alloy Steel Inconel 600, Inconel 625, Incoloy 825, Hastelloy C276
Custom Material According to customer drawings and project specifications

Anchor Flange Dimensions

anchor-flange-dimension-drawing

Anchor Flange Dimension Drawing

Dimension Item Description
OD Outside Diameter
ID Inside Diameter / Pipe Bore
Anchor Ring Diameter Diameter of the anchoring ring section
Thickness Flange or anchor ring thickness
Ring Width Width of the anchor ring
Hub Diameter Diameter of the hub or pipe connection area
Bevel End Welding end preparation
Weld End Butt welding connection end

Anchor flanges are usually manufactured according to project drawings because their dimensions depend on pipeline size, design pressure, axial load, concrete block design, installation environment, and engineering calculation requirements.


Anchor Flange Advantages

Strong Pipeline Restraint

Anchor flanges help fix pipeline position and prevent axial movement caused by pressure thrust, thermal expansion, or external loads.

Reliable Load Transfer

The anchor ring transfers pipeline force to concrete blocks or structural supports, improving pipeline stability and safety.

Suitable for Buried Pipelines

Anchor flanges are widely used in underground oil, gas, water, and heating pipeline projects where pipe movement must be controlled.

Customized Structural Design

OD, ID, thickness, ring width, hub diameter, bevel end, coating, and material can be customized according to project drawings.

High Strength Manufacturing

Forged or heavy-duty machined structures provide excellent mechanical strength and long-term service performance.

Reduced Pipeline Stress Risk

Properly designed anchor flanges help reduce stress concentration, displacement, vibration, and pipeline damage.

3Advantages of Threaded Flange


Applications

Oil and Gas Pipelines

Used in long-distance oil and gas transmission pipelines to restrain axial movement and stabilize pipeline sections.

Buried Pipeline Systems

Suitable for underground pipelines where soil pressure, thermal expansion, and axial force need to be controlled.

Water Transmission Pipelines

Used in large-diameter water supply pipelines, pump stations, and valve chambers.

District Heating Pipelines

Anchor flanges help control thermal expansion in hot water and steam pipeline systems.

Chemical Processing Plants

Applied in process pipelines where stable pipe positioning and load control are required.

Power Generation

Used in cooling water pipelines, steam pipelines, and auxiliary pipeline systems.

Applications


Why Choose Us

Comprehensive Fabricating Capabilities

We coordinated manufacturing, warm treatment, machining, testing, and bundling beneath one roof. You get steady quality control all through the whole generation process.

International Standards Compliance

Our products meet ASME, EN, DIN, JIS, and GOST standards. You can specify the exact requirements for your regional applications with confidence.

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Extensive Estimate Run

From DN15 to DN4000, we cover essentially all mechanical necessities. Your ventures advantage from single-source obtainment convenience.

Quality Affirmation

Progressed testing offices guarantee each product meets details. You get certified items with total traceability documentation.

Global Trade Involvement

Our items serve markets over Europe and the Americas. You work with demonstrated providers who get it worldwide quality expectations.

Competitive Preferences

Prevalent quality, competitive estimating, secure bundling, and quick conveyance combine to back your extend timelines and budgets.

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Why Choose Us


FAQ

Q: What is an Anchor Flange?

A: An anchor flange is a special pipeline component used to restrain pipe movement and transfer axial loads to concrete blocks or structural supports.

Q: Is Anchor Flange the same as standard pipe flange?

A: No. Standard pipe flanges are mainly used for bolted pipe connection, while anchor flanges are used for pipeline fixing, axial load control, and structural anchoring.

Q: What standards are available for Anchor Flanges?

A: Anchor flanges can be manufactured according to ASME B16.5, ASME B16.47, MSS SP-44, API, EN, DIN, and customer drawings.

Q: Can Anchor Flange be customized?

A: Yes. OD, ID, thickness, ring width, hub diameter, material, coating, bevel end, and structure can be customized according to project requirements.

Q: Where are Anchor Flanges commonly used?

A: They are commonly used in oil and gas pipelines, buried pipelines, water transmission systems, district heating pipelines, pump stations, valve stations, and industrial pipeline systems.


Contact Us

Ready to enhance your pipeline stability with premium Anchor Flange solutions? Contact kevin.zhao@hkflange.com for technical specifications and competitive quotations today.

Fast Response

Clear Communication, and Reliable Technical Support