Фланцы являются важными компонентами трубопроводных систем., соединительные трубы, клапаны, насосы, и другое оборудование. Однако, не все фланцы одинаковы. One of the most important factors to consider when selecting a flange is its номинальное давление. This rating determines the maximum pressure the flange can handle under specific temperature conditions. В этой статье, we will explain what flange pressure ratings are, как они работают, and why they matter in industrial applications.

As a professional flange supplier, Сасафланж 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, долговечность, и соответствие.

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Каковы номинальные значения давления фланцев?

Flange pressure ratings, также известный как классы давления, 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 включать:

• Сорт 150

• Сорт 300

• Сорт 600

• Сорт 900

• Сорт 1500

• Сорт 2500

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

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Pressure Rating vs Actual Pressure

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

• Фланец материал

• Рабочая температура

• Corrosion allowance

• График труб

Например, Класс 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.

Например:

• Сорт 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.

Сасафланж 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: