Definition - What does Compact Flange mean?
A compact flange, similar to a swivel ring flange, is a two-piece constructed flange used extensively for offshore pipelines, offshore industry applications and onshore and sub-sea applications. Its double sealing action prevents hydrocarbon releases to address health and safety issues and concerns.
A compact flange offers significant weight and space savings over conventional flanges and leak-free joint integrity, and therefore is the most effective environmentally friendly piping joint available.
Corrosionpedia explains Compact Flange
The term “compact” given to these flanges signify that they are compact in size for small diameter pipeline applications. Compact flanges typically weight less than conventional ANSI flanges by 70 to 80 percent. These flanges have double independent seals that make them safer. Also these flanges have integrated sealing systems both inside and outside the flange, which allows them to have larger design pressure and temperature ranges. These flanges are used for 0.5 to 48 inch (1.27 to 122 cm) pipe sizes with a pressure rating of class 150 to class 2500 specifications.
Materials used to manufacture compact flanges include:
- ASTM A105, A350 LF2, LF6, A694 F52~F65
- AISI 4130, AISI 8630
- A182 F316/316L, F44, F51, F53, F55, F60
- ASTM B564 N06625