Expansion joint flange standards refer to specific specifications and requirements used to specify the connection between expansion joints and pipe flanges. These standards ensure that expansion joints can be safely and reliably connected to piping systems in different application environments. Some of the main expansion joint flange standards are listed below:
ANSI/ASME standard
ANSI/ASME B16.5: Covers dimensions, materials, pressure ratings, and test requirements for steel pipe flanges and flange fittings.
ANSI/ASME B16.47Specification for large diameter steel pipe flanges.
EN Standard (European Standard)
EN 1092-1: Specifies the dimensions, materials, marking and inspection requirements of steel pipe flanges.
JIS Standard (Japanese Standard)
JIS B2220: Standard for steel flanges, applicable to the Japanese market.
DIN standard (German standard)
DIN 2632: Standard for flanged and flanged connections.
GB/T standard (Chinese standard)
GB/T 12522-2009: Standard for stainless steel corrugated expansion joints, which specifies the product classification and technical requirements of stainless steel corrugated expansion joints with flange connection dimensions according to GB 569 and GB 2501.
Other industry standards
Such as JB/T 5964-92 and JB/T 7687-2008, these standards specify the design, manufacture and inspection requirements for metal bellows expansion joints.
These standards are not limited to the physical dimensions of the flange, but also include material requirements, pressure ratings, sealing surface types, bolt hole arrangements, bolt sizes and quantities, marking and inspection methods, and more. For example, sizes and types of flanges may include, but are not limited to, flat welded flanges, butt welded flanges, socket welded flanges, and the like, with each type of flange having its specific applicable scenario.
When designing and purchasing expansion joints, it is important to ensure that the flange selected meets the relevant standards, which helps to ensure the compatibility, safety and reliability of the system for long-term operation. In practical applications, operating conditions (such as temperature, pressure and media properties) and the expected working cycle of the expansion joint should also be taken into account to select the most suitable flange standard and type.