ANSI B16.5 YELLOW PAINT BLIND FLANGE

Blind flanges have no central opening and are mainly used to block the end of a pipe or isolate a section of a pipe. They seal and maintain pressure to prevent the medium in the pipe from leaking out and external substances from entering the pipe.They have a flat surface and are usually connected to other flanges or pipe ends by bolts. The sealing performance of blind flanges depends on the quality of the gasket and the tightness of the bolts. The yellow paint on the flange surface has both protective and decorative effects. 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.

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Standard Specification
ANSI B16.5 is a widely recognized American standard that deals with pipe flanges and flanged fittings. It comprehensively specifies technical details such as dimensions, pressure ratings, connection forms, and materials for flanges. This ensures the standardization and interchangeability of flanges in different industrial fields, enabling them to meet various engineering requirements.
Structural Features
Blind Flange Design
The blind flange has no central opening and is mainly used to block the end of the pipe or to isolate a certain section of the pipeline. It plays a role in sealing and pressure retention, preventing the medium in the pipeline from leaking out and external substances from entering the pipeline. It has a flat surface and is usually connected to other flanges or pipe ends through bolts. The sealing performance of the blind flange depends on the quality of the gasket and the tightness of the bolts.
Yellow Paint Coating
The yellow paint on the surface of the flange has both protective and decorative functions. From a protective perspective, it can prevent the flange from rusting and corroding by isolating air and moisture, thus prolonging the service life of the flange.
Dimensions and Specifications
Nominal Diameter
Generally, the nominal diameter of ANSI B16.5 yellow paint blind flanges ranges from NPS 1/2 (DN15) to NPS 24 (DN600) or even larger to adapt to different pipe sizes.
Pressure Ratings
It includes pressure ratings such as Class 150, Class 300, Class 600, Class 900, Class 1500 and Class 2500. The specific pressure rating needs to be selected according to the actual working conditions of the pipeline.
Application Areas
Petrochemical Industry
In petrochemical plants, blind flanges are often used in pipelines transporting oil, gas and other media. The yellow paint can resist the erosion of some chemical substances to a certain extent, and the blind flange can effectively isolate and seal the pipeline to ensure the safety and stability of the system.
Water Supply and Drainage Engineering
In water supply and drainage systems, they are used to block the end of the pipeline or to isolate some pipeline sections for maintenance or repair. The yellow color is easy to distinguish in the environment of the water supply and drainage project, which is convenient for operation and management.