2 Inch Galvanized Pipe Flange

2-inch galvanized pipe flanges are crucial components in piping systems, renowned for their reliable performance and enhanced corrosion resistance. Here is a detailed description of their product specifications, materials, and production and usage standards.

With a nominal pipe size of 2 inches, these flanges have an outer diameter of around 88.9 mm, in line with industry standards. The thickness of the flange plate typically ranges from 6 - 8 mm, providing the necessary strength to withstand working pressures up to 16 bar (or 232 psi). The bolt - hole pattern usually features four evenly - spaced holes, which are designed to fit M12 or 1/2 - inch bolts. This arrangement ensures a secure and leak - proof connection when the flanges are assembled. The face type of these flanges is often a raised face, with a height of about 2 - 3 mm, facilitating better gasket compression and sealing performance.

These flanges are primarily fabricated from carbon steel, which offers a good balance between strength and cost - effectiveness. The base carbon steel provides the required mechanical properties to handle the pressure and load in piping systems. After forming, the flanges undergo a hot - dip galvanization process. Immersed in molten zinc, a thick, adherent zinc coating with a minimum thickness of 85 microns is formed on the surface. This zinc layer acts as a sacrificial barrier, protecting the underlying steel from rust and corrosion, making the flanges suitable for applications in humid environments, water supply systems, and light - industrial settings.

In production, these flanges adhere to multiple international standards. In the United States, ANSI/ASME B16.5 sets the guidelines for dimensions, pressure - temperature ratings, and face types, ensuring compatibility with other piping components. ASTM A123 specifies the requirements for the hot - dip galvanization process, including the minimum coating thickness, adhesion, and appearance of the zinc layer. In Europe, DIN standards are widely followed, covering aspects such as material quality, dimensional tolerances, and mechanical properties. During usage, these flanges must be installed according to relevant codes, such as proper torqueing of bolts to avoid over - tightening or under - tightening, and selecting appropriate gaskets based on the fluid type and operating conditions. Regular inspection based on industry - recommended intervals is also necessary to maintain the integrity and safety of the piping system.

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