When working with piping systems, flanges play a critical role in ensuring secure and leak-free connections. But with so many types of flanges available, identifying the right one can be overwhelming—especially when faced with technical drawings, 명세서, or international standards. 이 기사에서는, we’ll walk you through how to identify flange types based on shape, 얼굴형, 압력 등급, 재료, and standards. This guide is ideal for engineers, 조달 전문가, and technical buyers.

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

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1. Why Flange Identification Matters

Correct flange identification ensures:

• Compatibility with pipes, 밸브, 및 피팅

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

• Prevention of leaks, 시스템 오류, or expensive rework

• Efficiency during procurement, 점검, and installation

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

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

일반적인 얼굴 유형은 다음과 같습니다.:

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

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

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

• 혀와 그루브 (티&G): Each flange has a matching tongue and groove; offers accurate alignment.

• Male and Female (중&에프): 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:

• 용접 목 플랜지: Has a long tapered hub; welded to the pipe. Used in high-pressure and high-temperature applications.

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

• 소켓 용접 플랜지: Has a socket to insert the pipe before welding. Used for smaller sizes and high-pressure services.

• 스레드 플랜지: Screwed onto a threaded pipe; requires no welding.

• 랩 조인트 플랜지: 스텁 엔드와 함께 사용; allows for easy alignment and rotation.

• 블라인드 플랜지: 보어 없음; used to close off a pipeline or valve.

• 오리피스 플랜지: Designed with pressure tap holes for flow measurement.

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

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2.3. 재료 유형

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

• 탄소강 – Common for general industrial applications.

• 스테인레스 스틸 (304, 316, 등.) – Used where corrosion resistance is essential.

• 합금강 – Suitable for high temperature and pressure.

• 듀플렉스/슈퍼듀플렉스 – Excellent for offshore and corrosive environments.

• Copper-Nickel, 모넬, 인코넬 – For marine, 화학적인, and specialty applications.

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

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2.4. 압력 등급 / 평가

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

• 수업 150

• 수업 300

• 수업 600

• 수업 900

• 수업 1500

• 수업 2500

Other standards like DIN PN (예를 들어, PN10, PN16, PN40) 또는 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 기준 it follows:

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

• ASME B16.47 – Flanges above 26″

• 당신의 것 1092-1 – European standard

• JIS B2220 – Japanese flanges

• 고스트 – Russian flanges

• BS 4504 – British standard