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.
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| 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
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 |
Image Position 3: Anchor Flange Dimension Drawing
图片建议：放一张 Anchor Flange 尺寸图，标注 OD、ID、Anchor Ring Diameter、Thickness、Ring Width、Hub Diameter、Bevel End、Weld End。
图片标题：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.
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.
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图片标题：Anchor Flange Workshop
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.
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图片标题：Anchor Flange Application Scenarios
Comprehensive Manufacturing Capability
We coordinate forging, heat treatment, machining, drilling, bevel preparation, inspection, coating, and packaging under one production system.
Customized Engineering Support
We can manufacture anchor flanges according to customer drawings, pipeline load requirements, pressure ratings, and installation conditions.
International Standards Compliance
Our products meet ASME, MSS, API, EN, DIN, and customer project specifications.
Wide Material Options
Carbon steel, pipeline steel, stainless steel, alloy steel, duplex steel, nickel alloy, and customized materials are available.
Strict Quality Inspection
Each batch is inspected for material grade, dimensions, ring thickness, bore accuracy, bevel end, surface quality, and appearance.
Export Packaging Support
Anti-rust treatment, wooden case packaging, steel frame packaging, and customized marking are available for international shipment.
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图片标题：Anchor Flange Certificates
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.
Ready to enhance your pipeline stability with premium Anchor Flange solutions? Contact us for technical specifications, customized drawings, and competitive quotations today.
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Clear Communication, and Reliable Technical Support