Slip-On Flange Dimensions - Complete Reference Guide

Slip-on flanges are among the most commonly used flange types in piping systems, offering ease of installation and cost-effective solutions for low to moderate pressure applications. These flanges slip over the pipe end and are welded both inside and outside to create a secure connection. Governed by ASME B16.5 standards for sizes ½" to 24" NPS and ASME B16.47 for larger diameters, slip-on flanges are available in multiple pressure classes ranging from 150 to 2500.

Understanding proper dimensions is critical for successful piping system design and procurement. Key dimensional parameters include outside diameter, inside diameter, bolt circle diameter, bolt hole specifications, flange thickness, and hub length through the flange body. These dimensions vary significantly across different pressure classes and nominal pipe sizes.

Our comprehensive dimension charts below provide detailed specifications for all ASME B16.5 pressure classes, including metric and imperial measurements, weight calculations, and bolt requirements. Whether you're designing new systems or replacing existing components, these reference tables ensure accurate specification and proper fit for your piping applications.

Browse the specific pressure class dimensions below to find the exact specifications you need for your project.