Boru sistemleriyle çalışırken, flanşlar güvenli ve sızdırmaz bağlantıların sağlanmasında kritik bir rol oynar. Ancak pek çok flanş türü mevcut olduğundan, identifying the right one can be overwhelming—especially when faced with technical drawings, özellikler, or international standards. Bu makalede, we’ll walk you through how to identify flange types based on shape, face type, basınç derecesi, malzeme, ve standartlar. This guide is ideal for engineers, satın alma uzmanları, and technical buyers.

Throughout this article, we’ll also highlight how SASA FLANGE can support your flange needs with accurate identification, üretme, and custom solutions.

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1. Why Flange Identification Matters

Correct flange identification ensures:

• Compatibility with pipes, vanalar, ve bağlantı parçaları

• Compliance with industry standards (ASME, DIN, EN, JIS, vesaire.)

• Prevention of leaks, sistem hatası, or expensive rework

• Efficiency during procurement, denetleme, ve kurulum

Misidentifying flange types can result in mismatched connections, delayed projects, and increased costs. That’s why a clear understanding of the different types is essential.

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2. Key Factors to Identify Flange Types

2.1. Flange Face Type

The face type is the surface that comes into contact with the gasket. It plays a role in the sealing method and pressure containment.

Common face types include:

• Yükseltilmiş Yüz (RF): A small raised surface around the bore, most common in industrial piping.

• Düz Yüz (FF): Entire face is flat, often used with cast iron components.

• Halka Tipi Bağlantı (RTJ): Features a deep groove and requires a metal ring gasket; used for high-pressure systems.

• Dil ve Oluk (T&G): Each flange has a matching tongue and groove; offers accurate alignment.

• Erkek ve Kadın (M&F): Similar to T&G but uses a wider sealing surface.

You can identify the face type by visually inspecting the sealing surface or checking engineering drawings.

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2.2. Flange Connection Type

Flanges connect to the piping system in different ways:

• Kaynak Boyunlu Flanş: Has a long tapered hub; welded to the pipe. Used in high-pressure and high-temperature applications.

• Geçmeli Flanş: Slides over the pipe and is welded inside and outside. Easier to align but less strong.

• Soket Kaynak Flanşı: Has a socket to insert the pipe before welding. Used for smaller sizes and high-pressure services.

• Dişli Flanş: Screwed onto a threaded pipe; requires no welding.

• Tur eklem flanşı: Saplama ucuyla kullanılır; allows for easy alignment and rotation.

• Kör Flanş: No bore; used to close off a pipeline or valve.

• Orifis Flanşı: Designed with pressure tap holes for flow measurement.

Each flange type has a distinct shape and installation method. Observing the flange neck, merkez, and bore can help you identify the type.

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2.3. Malzeme Türü

Flanges are made from a range of materials depending on application needs:

• Karbon Çelik – Common for general industrial applications.

• Paslanmaz çelik (304, 316, vesaire.) – Used where corrosion resistance is essential.

• Alaşımlı Çelik – Suitable for high temperature and pressure.

• Duplex/Super Duplex – Excellent for offshore and corrosive environments.

• Bakır-Nikel, Monel, İnkonel – For marine, kimyasal, and specialty applications.

Material identification may require checking the markings on the flange or reviewing the mill certificate.

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2.4. Basınç Sınıfı / Derecelendirme

Flanges are classified by their pressure-temperature rating. The most common standard is ASME B16.5, with pressure classes:

• Sınıf 150

• Sınıf 300

• Sınıf 600

• Sınıf 900

• Sınıf 1500

• Sınıf 2500

Other standards like DIN PN (örneğin, PN10, PN16, PN40) veya JIS also apply.

The pressure class is typically marked on the flange along with the size and material grade.

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2.5. Standard and Specification

To identify a flange, check which standart it follows:

• ASME/ANSI B16.5 – Flanges from ½” to 24″

• ASME B16.47 – Flanges above 26″

• DIN EN 1092-1 – European standard

• JIS B2220 – Japanese flanges

• GOST – Russian flanges

• BS 4504 – British standard