ASME B16.5


Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24, Metric/Inch Standard

2020 Edition

Published by ASME International, 01/29/2021

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ASME B16.5, 2020 Edition – Pipe Flanges and Flanged Fittings NPS ½ Through NPS 24 Metric/Inch Standard

ASME B16.5 is a standard developed by the American Society of Mechanical Engineers (ASME) that covers the dimensions and tolerances for flanges in piping systems. Flanges are used to connect pipes, valves, pumps, and other equipment to form a piping system. ASME B16.5 provides specifications for flanges in various materials, sizes, pressure ratings, and methods of designating openings for flanges and flanged fittings.

Here are some key points about ASME B16 5:

Scope: The standard covers a wide range of flange types, including weld neck, slip-on, socket weld, threaded, lap joint, and blind flanges. It includes flanges and flanged fittings made from materials such as carbon steel, stainless steel, alloy steel, and other materials suitable for high-temperature and high-pressure applications.

Pressure and Temperature Ratings: ASME B16.5 provides pressure-temperature ratings for flanges, indicating the maximum allowable working pressure at various temperatures. These ratings are essential for selecting the appropriate flange material and class for a specific application.

Dimensions and Tolerances: The standard specifies the dimensions and tolerances for flanges, including bolt hole patterns, facing dimensions, flange thickness, and other critical dimensions. Proper adherence to these specifications ensures compatibility and proper assembly of flanged connections.

Marking and Certification: ASME B16.5 outlines requirements for marking flanges to indicate compliance with the standard. Flanges meeting the specifications of this standard may also carry a certification mark from the manufacturer.

Applications: ASME B16.5 flanges are widely used in various industries, including oil and gas, petrochemical, chemical processing, power generation, and water treatment, among others. They are essential components in piping systems for the safe and efficient transport of fluids and gases.

This Standard is to be used in conjunction with equipment described in other volumes of the ASME B16 Series of Standards as well as with other ASME standards, such as the Boiler and Pressure Vessel Code and the B31 Piping Codes.

Product Details

Revision: 2020 Edition

Published Date: January 29, 2021

Status: Active, Most Current

Document Language: English

Published By: ASME

Page Count: 250



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