Anchor Flange Catalogue
Custom anchor flange solutions for pipeline anchoring and thermal expansion control
Anchor Flange Types
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Fixed Anchor Flange
Anchor flange designed to fix the pipe line and control thermal expansion.
Installation Types:
Standard Dimensions
| Nominal Size | Outside Diameter (mm) | Thickness (mm) | Bolt Circle (mm) | Number of Bolts | Anchor Holes | Hole Size (mm) |
|---|---|---|---|---|---|---|
| 4" | 229 | 19 | 152.5 | 8 | 4 | 24 |
| 6" | 279 | 22 | 190.5 | 8 | 4 | 24 |
| 8" | 343 | 25 | 241.5 | 8 | 4 | 27 |
| 12" | 483 | 32 | 355.5 | 12 | 6 | 27 |
| 16" | 597 | 38 | 457 | 16 | 8 | 30 |
| 24" | 749 | 48 | 641 | 20 | 8 | 33 |
Key Features
- Fully restrained connection
- High axial load capacity
- Thermal expansion control
- Welded connection
- Heavy duty design
- On-site anchoring
Applications
- Pipe line anchoring
- Compressor stations
- Pump stations
- Boiler connections
- Power plants
- Industrial facilities
Design Features
- Reinforced body design
- Support plates
- Weld details
- Concrete anchor holes
- Protective coating
Technical Notes
- Minimum concrete strength should be 25 MPa.
- Anchor rods should be stainless steel.
- Alignment before installation is critical.
- Thermal movement calculations must be made.
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Detailed Technical Information and Quotation
Contact our expert team for detailed technical documents, application recommendations, and custom size quotations regarding this product type.
Get Technical SupportWhat is an anchor flange?
An anchor flange is a heavy forged flange welded into a pipeline and encased in a concrete anchor (thrust) block. It is not a bolted joint: its job is to fix the pipe axially and transfer thrust loads from thermal expansion and internal pressure into the structure. Produced from 2" to 60" to ASME/AWWA practice or fully custom design.
Where and how anchor flanges are used
Anchor flanges are placed wherever the pipeline needs a fixed point: pump and compressor station boundaries, both banks of river and road crossings, steep slopes, aboveground-to-buried transitions and line terminations. The flange is butt-welded into the pipe on both sides and then embedded in a concrete block; expansion forces spread into the concrete through its large outside diameter. Unlike a standard flange it has no gasket face and no bolt holes — it is purely a load-transfer component. Each unit is custom-engineered from the pipe diameter, wall thickness, operating pressure and axial load calculation. Materials: forged carbon steel A105, A694 F42–F70 to match line pipe strength, A350 LF2 for low temperature. Delivered with NDT (UT/MT) and 3.1 certificates.
Frequently Asked Questions
What is the difference between an anchor flange and a standard flange?+
A standard flange is a bolted, demountable joint; an anchor flange has no gasket face or bolt holes — it is a load-transfer component that fixes the pipe into concrete.
What loads does an anchor flange carry?+
Axial thrust loads from thermal expansion/contraction and internal pressure; it takes them from the welded pipe and transfers them into the concrete anchor block.
Where are anchor flanges installed?+
At pump/compressor station boundaries, on both banks of river and road crossings, on steep slopes, at aboveground-to-buried transitions and at line terminations.
Which materials are anchor flanges made from?+
Forged carbon steel A105, A694 F42–F70 to match line-pipe strength, or A350 LF2 for low-temperature service; dimensions are engineered per project and verified with NDT + 3.1 certificates.
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