Flange Dims / Weights: Know What You're Working With
Why Dimensions and Weight Matter
Knowing your flange's exact dimensions and weight is critical for:
- Proper Fit: Dimensions ensure flanges mate correctly with pipes, valves, and equipment.
- Load Planning: Weight calculations matter for support structures, lifting, and installation logistics.
- Shipping Efficiency: Accurate weights help with freight cost estimates and carrier selection.
- Engineering Accuracy: Precise specs are essential for pressure equipment design and certification.
What We Provide
For every flange, we supply:
- OD (Outer Diameter) – overall width across the flange face
- BCD (Bolt Circle Diameter) – hole pattern center-to-center
- Bolt Holes – quantity, size, and drilling pattern
- Thickness – flange body and face thickness
- Hub Dimensions – bore, raised face, RF/FF specs
- Weight – per-unit weight for material planning
Standard Specifications
ASME B16.5 & B16.47
American standards covering flanges from 1/2" to 48". B16.5 covers smaller flanges; B16.47 covers large-diameter, high-pressure flanges. Both define Class ratings (150, 300, 400, 600, etc.).
DIN / EN Standards
European standard EN 1092-1 defines flange types and pressure ratings. Dimensions differ from ASME — a 4" DIN flange is not the same as a 4" ASME flange.
JIS Standards
Japanese Industrial Standard for flange dimensions and bolt patterns. Commonly used in Asian manufacturing and OEM applications.
Sample Weight Table — ASME B16.5, Carbon Steel
| Size | Class 150 | Class 300 | Class 600 |
|---|---|---|---|
| 2" | ~3.5 lbs | ~6.5 lbs | ~10 lbs |
| 4" | ~9 lbs | ~16 lbs | ~27 lbs |
| 6" | ~19 lbs | ~34 lbs | ~59 lbs |
| 12" | ~64 lbs | ~125 lbs | ~245 lbs |
Weights vary by material, finish face type, and bore. Stainless steel and alloys will differ. Request exact specs for your project.
Standard vs. Custom
Standard flange dimensions are published in spec sheets. Custom flanges may have non-standard OD, BCD, bore, or thickness to fit your equipment or application. We provide full drawings and specs for every custom job.
Need Exact Specifications?
Get a quote and detailed spec sheet from Texas Flange — we'll provide dimensions, weight, and material data for your project.