Flansche sind wesentliche Komponenten in Rohrleitungssystemen, Verbindungsrohre, Ventile, Pumps, und andere Ausrüstung. Jedoch, Nicht alle Flansche sind gleich. One of the most important factors to consider when selecting a flange is its Druckstufe. This rating determines the maximum pressure the flange can handle under specific temperature conditions. In diesem Artikel, we will explain what flange pressure ratings are, wie sie funktionieren, and why they matter in industrial applications.

As a professional flange supplier, sasa länglich 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, Haltbarkeit, und Compliance.

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Was sind Flanschdruckwerte??

Flange pressure ratings, auch bekannt als Druckklassen, 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 enthalten:

• Klasse 150

• Klasse 300

• Klasse 600

• Klasse 900

• Klasse 1500

• Klasse 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 nicht mean it can handle exactly 150 psi. The pressure capacity varies depending on:

• Flansch Material

• Betriebstemperatur

• Corrosion allowance

• Rohrplan

Zum Beispiel, eine Klasse 150 stainless steel flange may handle 285 psi at 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.

Zum Beispiel:

• Klasse 300 flange in carbon steel may handle:

  • 570 psi at 100°F

  • 260 psi at 600°F

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

sasa länglich 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: