Custom Shaped Petroleum Flange Rings (Non-Standard Bolt Holes) ASTM A105 Carbon Steel High Pressure Corrosion Resistant
1: Product Overview:
Our Custom-Shaped Petroleum Flange Rings are engineered for demanding oil and gas applications requiring high-pressure resistance, corrosion durability, and non-standard configurations. Manufactured from ASTM A105 carbon steel and precision-machined to accommodate complex geometries and bespoke bolt hole patterns, these flanges ensure reliable performance in pipelines, wellheads, and refinery systems.
2, Features & Specifications
1. Superior Material Properties
Material: ASTM A105 Carbon Steel (Forged & Normalized)
Standards Compliance: ASME B16.5, API 6A, NACE MR0175
Mechanical Properties:
Tensile Strength: ≥485 MPa | Yield Strength: ≥250 MPa
Hardness: ≤187 HB (Annealed for Machinability)
Corrosion Resistance: Ideal for CO₂/H₂S environments with optional coatings
3. Precision Manufacturing
Custom Geometry: Laser-scanned profiles for non-circular or asymmetrical shapes.
Non-Standard Bolt Holes: CNC-drilled with positional accuracy ±0.2mm
Pressure Rating: Class 150 to Class 2500
Surface Finish: Machined to Ra ≤3.2μm (or coated for enhanced corrosion protection).
3. Technical Specifications
Size Range: 2" to 48" nominal diameter (Customizable dimensions).
Temperature Range: -29°C to 425°C (Compatible with cryogenic to high-heat operations).
Dimensional Tolerance:
Outer Diameter: ±1.5mm | Bolt Hole Circle (BHC): ±0.5mm.
4, Advantages:
✅ Bespoke Design Flexibility
Adapt to non-standard bolt patterns and irregular shapes without costly molds, ideal for retrofit or legacy systems.
3D modeling support (STEP/IGES files) for seamless integration into existing pipelines.
✅ High-Pressure Integrity
ASTM A105’s forged structure ensures uniform grain flow, critical for high burst strength in oilfield operations.
✅ Rapid Turnaround
Prototype to bulk production in 15-30 days (Small batches accepted).
✅ Compliance & Safety
NACE MR0175 certification available for sour gas (H₂S) environments.
100% PT (Penetrant Testing) or UT (Ultrasonic Testing) to detect subsurface defects.
5, Applications:
Oil & Gas: Pipeline connectors, wellhead flanges, subsea equipment.
Refineries: High-temperature reactor flanges, valve manifolds.
Petrochemical: Acid-resistant flange joints, compressor systems.
Energy: Hydraulic power units, geothermal piping.
6, Manufacturing process
1. Forging & Shaping Hot forging ASTM A105 billets into near-net shapes.
2. Heat Treatment Normalizing (900-950°C) to refine microstructure.
3. CNC Machining 5-axis CNC milling for custom profiles and bolt holes.
4. Surface Finishing Shot blasting + anti-corrosion coatings (optional).
5. Quality Control Dye penetrant (PT) / ultrasonic (UT) testing + 3D CMM.
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Petroleum ASTM A105 Carbon Steel Flange Rings With Non Standard Bolt Holes Images
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