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A flange standard popularized in the United States is codified by the American National Standards Institute (ANSI), and is also sometimes named after the organization's previous name, the American Standards Association (ASA). [7] These flanges have elastomeric o-ring seals and can be used for both vacuum and pressure applications.
The ASME B16 Standardization of Valves Flanges, Fittings and Gaskets Committee, which operates under ASME’s Board on Pressure Technology Codes and Standards is responsible for standards covering valves, flanges, pipe fittings, gaskets and valve actuators for use in pressure services.
The ANSI SLAS microplate standards define a footprint, and a bottom flange geometry. These footprints & flanges are generally rigorously followed by all microplate manufacterers: Footprint standard [10] [11] (127.76 mm × 85.48 mm ± 0.5 mm) Flange standard [14] [15]
Common world standards include ASA/ASME (USA), PN/DIN (European), BS10 (British/Australian), and JIS/KS (Japanese/Korean). In the USA, the standard is ASME B16.5 (ANSI stopped publishing B16.5 in 1996). ASME B16.5 covers flanges up to 24 inches size and up to pressure rating of Class 2500. Flanges larger than 24 inches are covered in ASME B16.47.
ANSI/ASME Standards. Three ASME A13.1 pipe markers. ... Valves and flanges. Approximately every 25 feet (7.6 m) to 50 feet (15 m) on straight sections.
AN sizes range from -2 (dash two) to -32 in irregular steps, with each step equating to the OD (outside diameter) of the tubing in 1 ⁄ 16-inch increments. Therefore, a -8 AN size would be equal to 1 ⁄ 2-inch OD tube. However, this system does not specify the ID (inside diameter) of the tubing because the tube wall can vary in thickness.
In the US, flanges are either threaded or welded onto the pipe. In the European market flanges are usually welded onto the pipe. In the US, flanges are available in a standard 125 lb bolt pattern as well as a 250 lb (and heavier) bolt pattern (steel bolt pattern). Both are usually rated at 250 psi (1,700 kPa).
This is an incomplete list of DIN standards. The "STATUS" column gives the latest known status of the standard . If a standard has been withdrawn and no replacement specification is listed, either the specification was withdrawn without replacement or a replacement specification could not be identified.
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