В мире промышленных трубопроводов и водопроводных систем, Выбор правильного стандарта фланца имеет важное значение для производительности, безопасность, и долговременная надежность. One such important specification is the AWWA flange standard, widely used in municipal water supply, очистка сточных вод, and utility piping networks. But what exactly is the AWWA flange standard, and how does it differ from other common standards like ASME or EN?

В этой статье, we explore the definition, приложение, размеры, and importance of AWWA flange standards—and why choosing a reliable manufacturer like Сасафланж ensures compliance and durability.

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What Does AWWA Stand For?

AWWA stands for the American Water Works Association, an organization that sets industry benchmarks and guidelines for water treatment, distribution, and infrastructure. The AWWA flange standard primarily refers to АВВА C207, which outlines dimensions and performance criteria for steel pipe flanges used in water service.

Unlike ASME B16.5, which is designed for high-pressure and high-temperature environments like oil and gas, AWWA flanges are made for low-pressure water systems—typically operating under 300 пси.

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What Is AWWA C207?

АВВА C207 is the governing standard that specifies the dimensions, материалы, and design of steel pipe flanges for waterworks service. It covers:

• Flange classes (Б, Д, Э, Ф)

• Nominal pipe sizes from 4 к 144 дюймы

• Bolt patterns, толщина, and facing options

• Material requirements (typically carbon steel)

Each flange class in AWWA C207 has different pressure ratings and usage conditions. Например:

• Class B: 86 psi max, for light-duty service

• Class D: 175 psi max, most common for standard water lines

• Class E and F: Heavy-duty flanges up to 300 пси, used for higher pressure zones or special equipment

В Сасафланж, we manufacture and stock AWWA C207 flanges in all major classes to meet your water system needs efficiently and reliably.

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Key Features of AWWA Flanges

1. Large Diameter Range

AWWA flanges are designed for large water pipelines and infrastructure. The size range goes well beyond traditional industrial flanges, supporting pipelines up to 144 дюймы в диаметре.

2. Плоский дизайн лица

Unlike raised face flanges used in high-pressure systems, AWWA flanges usually have flat faces, which are compatible with rubber or non-metallic gaskets commonly used in water and wastewater applications.

3. Flexible Material Options

Most AWWA flanges are made from углеродистая сталь или ductile iron, suitable for above-ground and buried installations.

4. Low to Medium Pressure Rating

Ideal for pipelines operating at less than 300 пси, making them perfect for potable water, противопожарная защита, irrigation, and stormwater systems.

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Applications of AWWA Flange Standards

The AWWA C207 flange standard is used in a wide range of municipal and infrastructure projects, включая:

• Водоочистные сооружения

• Sewage treatment facilities

• Irrigation networks

• Stormwater drainage systems

• Fire protection piping

• Reservoir piping connections

• Насосные станции

Because of their specific design for water flow and corrosion protection, AWWA flanges help ensure long-term service with minimal maintenance.

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AWWA vs ASME Flanges: В чем разница?

While both AWWA and ASME flanges serve similar functions, their design and intended use are quite different: