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ANSI B16.5 is a widely recognized American standard covering pipe flanges and flange accessories. It comprehensively specifies technical details such as flange size, pressure rating, connection form and material. This ensures the standardization and interchangeability of flanges in different industrial fields, enabling them to meet various engineering requirements.
Structural Features
Blind Flange Design
Blind flanges have no central opening and are mainly used to block the end of a pipeline or isolate a certain section of a pipeline. It plays a sealing and pressure-retaining role to prevent the leakage of the medium in the pipeline and the entry of external substances into the pipeline. It has a flat surface and is usually connected to other flanges or pipe ends by bolts. The sealing performance of the blind flange depends on the quality of the gasket and the tightness of the bolts.
Black Paint Coating
The black paint on the flange surface has both protective and decorative functions. From a protective perspective, it can isolate air and moisture, prevent the flange from rusting and corrosion, and thus extend the service life of the flange.
Size Specifications
Generally speaking, the nominal diameter of ANSI B16.5 black paint blind flanges ranges from NPS 1/2 (DN15) to NPS 24 (DN600) or even larger to accommodate different pipe sizes.
Pressure Level
Including 150, 300, 600, 900, 1500, 2500 and other pressure levels. The specific pressure level needs to be selected according to the actual working conditions of the pipeline.
Application Field
Petrochemical
In petrochemical plants, blind flanges are often used in pipelines that transport media such as oil and natural gas. Black paint can resist the erosion of some chemicals to a certain extent, and blind flanges can effectively isolate and seal the pipeline to ensure the safety and stability of the system.
