What is the standard used for flanges?

A flange is a bolt circle-equipped connection element that fastens and joins one component to another.

Flanges provide a dependable connection for machinery, valves, and system parts by joining pipes, rail wheels, ducts, and power transfers.

Flanges are the second most common way to attach components after welding, and they provide flexibility in comparison to welding.

A flange is a bolt circle-equipped connection element that fastens and joins one component to another.

Flanges provide a dependable connection for machinery, valves, and system parts by joining pipes, rail wheels, ducts, and power transfers.

Flanges are the second most common way to attach components after welding, and they provide flexibility in comparison to welding.

In many sectors, standard flanges are essential connectors that join pipe systems. For smooth integration and compatibility in multinational projects, it is essential to comprehend the classifications and variances of flanges from other nations.

Across international businesses, standardization guarantees compatibility and safety. By creating uniform standards that suppliers, producers, and end users can depend on, it promotes global commerce. This article examines the classification systems used in different nations for standard flanges, emphasizing their unique characteristics and applications.

ANSI Flanges: The American Standard

The use of ANSI (American National Standards Institute) flanges is widespread in the US. There are two popular standards, ANSI B16.5 and ANSI B16.47, each with particular requirements. For nominal pipe diameters ranging from 1/2″ to 24″, ANSI B16.5 is applicable, while ANSI B16.47 addresses higher sizes.

DIN Flanges: German Precision

Germany complies with DIN (Deutsches Institut für Normung) flange standards. Notable requirements with a reputation for accuracy and dependability include DIN 2501 and DIN 2633. While DIN 2633 focuses on welding neck flanges, DIN 2501 provides nominal pressure ratings.

JIS Flanges: Japanese Excellence

For flanges, Japan adheres to the JIS (Japanese Industrial Standards). JIS B2220 and JIS B2291 provide comprehensive requirements for several kinds of flanges. B2291 is concerned with flange connections for hydraulic fluid power, while B2220 deals with steel pipe flanges.

BS Flanges: British Standards

British Standards, or BS, are what British companies use for flanges. Notable standards are BS 10 and BS 4504, where BS 4504 specifies circular flanges while BS 10 focuses on nominal sizes.

AS Flanges: Australian Standards

For flanges, Australia utilizes AS (Australian Standards). Frequently cited standards are AS 4087, which addresses Class PN14 and PN16 flanges, and AS 2129, which deals with table flanges.

GOST Flanges: Russian Standards

For flanges, Russian enterprises adhere to GOST (Gosudarstvennyy Standart) requirements. Notable standards include GOST 12820, which covers plate flanges, and GOST 12821, which concentrates on butt-welded flanges.

Chinese Flanges: GB/T Standards

China follows the GB/T (Guobiao) flange specifications. GB/T 9112, which describes welding neck flanges, and GB/T 9124, which deals with plate flanges, are two frequently used standards.

UNI Flanges: Italian Standards

Italy adheres to the flange standards set out by UNI (Ente Nazionale Italiano di Unificazione). Notable standards include UNI 6089, which specifies welding neck flanges, and UNI 2278, which deals with slip-on flanges.

There are differences in materials, pressure and temperature ratings, and diameters between standard flanges from various nations. It is essential to comprehend these distinctions in order to choose the appropriate flanges for certain applications.