Custom Flanges & Anchor Bolts
Precision forged flanges and heavy-duty foundation anchor bolts (including pre-embedded anchor cages) engineered for structural steel column bases, heavy equipment foundations, power towers, and industrial piping networks. Precision CNC-machined from high-tensile carbon steel, alloy steel, and stainless steel. Features customizable flange configurations (Weld Neck, Slip-On, Blind, Heavy Column Base Rings) and anchor bolt geometries (L-type, J-type, Straight Studs, Rigid Cages) with hot-dip galvanized anti-corrosion finishes. Built to withstand extreme uplift, shear, and overturning moments under dynamic loading conditions.
Categories: Custom Fabrications & Hardware
Custom Flanges & Anchor Bolts
Custom flanges and heavy-duty anchor bolt assemblies are fundamental load-transfer components connecting structural steel columns, tower legs, heavy machinery, and piping networks directly to concrete foundations. Precision-machined from high-tensile steel grades and protected by advanced anti-corrosion coatings, these components provide maximum resistance against shear forces, tension uplift, and dynamic overturning moments.
Includes Weld Neck (WN), Slip-On (SO), Blind (BL), and heavy column base ring flanges CNC-drilled to custom pitch circle diameters (PCD).
Manufactured in L-type, J-type, straight stud, and welded plate-anchor configurations to deliver superior concrete mechanical bonding.
Engineered to absorb immense axial tension, seismic shear, and wind overturning loads at heavy structural steel column bases.
Factory welded positioning templates ensure exact anchor bolt spacing and alignment, preventing foundation bolt displacement during concrete pouring.
- Raw Material Selection: Forged carbon steel (A105, Q355B), high-strength alloy steel (42CrMo), or stainless steel tailored to design temperature and structural load requirements.
- CNC Machining & Threading Precision: Threaded ends feature precision rolled metric or UNC threads; flanges are CNC faced and drilled for zero-gap gasket seating and smooth bolt insertion.
- Anti-Corrosion Galvanizing: Hot-dip galvanizing conforming to ISO 1461 / ASTM A153 with zinc coating thickness up to 85μm – 100μm for long-term underground exposure.
- Structural Steel Building Foundations: Primary column baseplate anchoring for heavy industrial plants, warehouses, and high-rise steel frames.
- Heavy Machinery & Equipment Mounting: Securing heavy vibrating machinery, air compressors, industrial press beds, and crane rails.
- Transmission Towers & Wind Turbines: Pre-embedded high-strength anchor cage foundations for wind turbine towers and high-voltage power lines.
- Petrochemical & Pressure Piping Systems: High-pressure custom forged flange connections for chemical pipelines, storage tanks, and pressure vessels.
- Zero-Displacement Anchor Cages: Pre-fabricated rigid templates eliminate field measuring errors and guarantee perfect fitment with column baseplates.
- Tailored Non-Standard Fabrication: Full custom manufacturing capabilities based on customer CAD/Tekla drawings for special bolt lengths, thick base rings, and large diameters.
- Certified Quality & Traceability: 100% ultrasonic flaw testing on thick flange forgings and proof-load testing for high-strength bolt grades.
- Thread Protection During Concrete Pouring: Wrap exposed anchor bolt threads with protective tape or plastic sleeves before pouring concrete to prevent slurry contamination.
- Leveling Nut & Washer Adjustment: Use double nuts and washer plates beneath the column baseplate to achieve precise elevation adjustment before final non-shrink grouting.
- Calibrated Torque Tightening: Tighten high-strength anchor nuts using calibrated torque wrenches in a cross-star pattern to ensure uniform clamping force distribution.
