Flensa merupakan komponen penting dalam sistem perpipaan, menghubungkan pipa, katup, pompa, dan peralatan lainnya. Namun, tidak semua flensa diciptakan sama. One of the most important factors to consider when selecting a flange is its peringkat tekanan. This rating determines the maximum pressure the flange can handle under specific temperature conditions. Dalam artikel ini, we will explain what flange pressure ratings are, bagaimana mereka bekerja, and why they matter in industrial applications.

As a professional flange supplier, sasa lonjong offers a wide range of pressure-rated flanges to meet the demands of different industries and applications. Understanding these ratings can help you select the right flange for your project and ensure safety, daya tahan, dan kepatuhan.

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Apa Itu Peringkat Tekanan Flange?

Flange pressure ratings, juga dikenal sebagai kelas tekanan, indicate the amount of internal pressure a flange can safely withstand at a given temperature. These ratings are defined by international standards such as:

• ASME B16.5 (used in the US and internationally)

• EN 1092-1 (European standard)

• DIN (German standards)

Common pressure ratings in ASME B16.5 termasuk:

• Kelas 150

• Kelas 300

• Kelas 600

• Kelas 900

• Kelas 1500

• Kelas 2500

Each class refers to a range of pressure capacities, not a fixed number of pounds per square inch (psi).

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Pressure Rating vs Actual Pressure

It is important to note that a Class 150 flange does bukan mean it can handle exactly 150 psi. The pressure capacity varies depending on:

• Flens bahan

• Suhu pengoperasian

• Tunjangan korosi

• Jadwal pipa

Misalnya, sebuah Kelas 150 stainless steel flange may handle 285 psi pada 100°F, but its capacity decreases as the temperature increases.

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Temperature Effects on Pressure Ratings

Flange pressure ratings are temperature-dependent. The higher the temperature, the lower the pressure rating. This is due to the weakening of the flange material at elevated temperatures.

Misalnya:

• Kelas 300 flange in carbon steel may handle:

  • 570 psi pada 100°F

  • 260 psi at 600°F

Different materials (like stainless steel or alloy steel) will have different reductions in capacity.

sasa lonjong provides material-specific pressure rating tables to help customers select the right flange under their expected temperature range.

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Flange Rating Conversion: ASME vs EN

If you work with global suppliers, you may encounter different rating systems: