FLANGE DIMENSIONS
Overview
The FLANGE DIMENSION CHART provides precise dimensional reference for all major stainless steel flange types, including Class 150–600 weld neck, slip-on, threaded, blind, and lap joint flanges. Engineers, fabricators, inspectors, and installers rely on accurate bolt-hole patterns, flange thicknesses, facing heights, and bore dimensions to ensure proper fit-up and safe system operation.
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Technical Structure
Dimensional data in the FLANGE DIMENSION CHART follows ASME B16.5 and MSS SP-44 standards. Each flange class and type includes critical measurements used for pressure containment and mechanical sealing.
- Flange Types: WN, SO, BL, THD, LJ, PL
- Class Ratings: 150, 300, 600 (with higher classes via inquiry)
- Dimensions Included:
- Outside Diameter (OD)
- Bolt Circle Diameter (BCD)
- Bolt Hole Count & Size
- Flange Thickness (T)
- Raised Face Height (RF)
- Bore & Hub Dimensions (for WN flanges)
- Material Grades: 304/304L, 316/316L, Duplex, High Alloys
- Compatibility: ASME pipe schedules, gasket standards, stud bolt tables
Applications
The FLANGE DIMENSION CHART supports dimensional verification during engineering, fabrication, procurement, and field installation. Bolt-hole alignment, gasket selection, and flange thickness validation all rely on accurate dimensional data.
- Engineering Design: Verifying flange OD, bolt circle, and bore match to system pressure.
- Fabrication: Ensuring weld neck fit-up and bevel alignment for spool assemblies.
- Installation: Bolt-hole rotation and gasket seating checks during field work.
- Maintenance: Replacement flange sizing and stud bolt selection.
- Hobbyist Applications: Small-scale pressure systems, structural stainless projects.
Industries Served
- Chemical & Petrochemical: High-pressure flange assemblies.
- Oil & Gas: Process lines, heat exchangers, steam systems.
- Food & Beverage: Utility piping requiring flange integration.
- Pharmaceutical: Stainless flange assemblies with hygienic cleaning requirements.
- Water Treatment: RO/DI lines and filtration skids.
- Energy & Power: High-temperature, high-pressure connections.
- Fabrication & OEM: Skid builders and modular equipment manufacturers.
Integration & Workflow
The FLANGE DIMENSION CHART integrates into every stage of design and installation, ensuring accuracy, safety, and compliance with engineering code requirements.
- Design Verification: Engineers confirm bolt patterns and pressure class sizing.
- Fabrication Integration: Weld neck hub alignment and bevel geometry validated prior to welding.
- Installation Accuracy: Ensures proper gasket compression and bolt torque values.
- QA/QC Documentation: Dimensional reports and inspection logs match ASME requirements.
- Training & Field Support: NEW installers quickly understand flange sizing relationships.