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.