현대 산업 시스템에서, instrumentation plays a crucial role in monitoring, 통제하다, 프로세스 최적화. 압력을 측정하는 것인지, 온도, 흐름, 또는 화학성분, accurate and reliable instrumentation depends on secure, leak-free connections. One of the key components enabling this is the instrumentation flange.

Selecting the correct flange for instrumentation ensures long-term performance, compatibility with sensors and fittings, 업계 표준 준수. In this SEO-optimized article, we explore the flange types used in instrumentation applications, how to select the right flange, 그리고 어떻게 SASA FLANGE supports global industries with high-quality instrumentation flange solutions.

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Understanding Instrumentation Flanges

Instrumentation flanges are specialized components used to mount and connect instruments such as:

• Pressure transmitters

• Flow meters

• Thermowells and RTDs

• Sampling probes

• Level gauges

They provide a standardized and secure interface between the instrument and the process line or vessel. Instrumentation flanges are used across oil & 가스, 석유화학, 제약, 수처리, and food processing industries.

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Why the Right Flange Matters for Instrumentation

Incorrect flange selection can result in:

• Leakage and process contamination

• Instrument misalignment or vibration damage

• Difficulties during calibration or maintenance

• Non-compliance with process safety standards

Instrumentation connections often operate under varying pressures and temperatures, and the flanges used must maintain integrity and allow for easy installation and servicing.

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Common Flange Types Used in Instrumentation

Depending on the application and instrumentation device, different flange types are preferred. Below are the most common flange types used in instrumentation:

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1. 소켓 용접 플랜지

다음에 가장 적합: 소구경, high-pressure instrument connections.

특징:

• Pipe or instrument neck inserted into a socket and fillet welded

• Smooth bore ensures good flow and signal transmission

• Compact size and reduced weight

응용:

• Pressure gauges

• Differential pressure transmitters

• Chemical injection lines

작동하는 이유: Socket weld flanges are ideal for high-pressure connections and ensure a strong, vibration-resistant joint in small-diameter systems.

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2. 스레드 플랜지

다음에 가장 적합: Non-welded instrumentation installations.

특징:

• Screwed directly onto the instrument or process pipe

• 용접 불필요

• Quick assembly and disassembly

응용:

• Pressure sensors in explosive environments

• Temporary installations

• Utility connections

작동하는 이유: Enables fast, secure installation where welding is prohibited, especially in hazardous areas.

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3. 용접 목 플랜지 (Small Bore)

다음에 가장 적합: 영구적인, high-integrity connections for critical instrumentation.

특징:

• 테이퍼드 넥은 응력 집중을 감소시킵니다.

• Butt-welded to the pipe or instrument adapter

• Available in smaller diameters for precision instruments

응용:

• Flow measurement using orifice flanges

• Pressure transmitter impulse lines

• High-temperature instrumentation

작동하는 이유: Weld neck flanges offer superior strength and alignment accuracy, making them suitable for critical process measurements.

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4. Orifice Flange Assembly

다음에 가장 적합: Flow measurement instrumentation.

특징:

• Special flange pair designed to hold an orifice plate

• Comes with pressure tapping holes

• Used with differential pressure flow transmitters

응용:

• Flow meters for gases, liquids, 그리고 증기

• Energy monitoring systems

• Custody transfer and billing

작동하는 이유: Orifice flanges simplify the installation of flow instrumentation and ensure standardized measurement accuracy.

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5. Blind Flange with Instrument Taps

다음에 가장 적합: Temporary isolation with instrumentation access.

특징:

• Used to seal off a pipe end while allowing instrumentation

• Can be drilled for pressure gauges, relief valves, or sensors

• Maintains full pressure rating

응용:

• Shutdown operations

• 수압 테스트

• Instrument calibration ports

작동하는 이유: Offers a dual function of sealing and measuring, useful in commissioning and maintenance tasks.

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Flange Face Options for Instrumentation

Instrumentation requires high sealing integrity. Common flange face types include:

• 제기된 얼굴 (RF): Compatible with spiral wound and soft gaskets

• 편평한 얼굴 (FF): Used with full-face rubber or PTFE gaskets

• 링형 조인트 (RTJ): Provides leak-proof, metal-to-metal seals for high-pressure measurement

• Smooth or Serrated Faces: Enhance gasket sealing in low-pressure instrumentation

Choosing the appropriate face type ensures accurate readings by maintaining a tight seal and preventing process leaks near sensitive instruments.

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Instrumentation Flange Sizes and Ratings

Most instrumentation flanges are manufactured in smaller diameters:

• 크기: Typically from ½” to 2”

• 평가: ANSI Class 150 에게 2500 depending on system pressure

• 표준: ASME B16.5, MSS-SP-44, EN 1092-1, API 6A, and others

For flow instrumentation, 오리피스 플랜지 conform to ASME/ISA standards and often include tapped holes for upstream and downstream measurements.

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Materials Used for Instrumentation Flanges

Material compatibility is critical to avoid contamination or corrosion. 일반적인 재료는 다음과 같습니다:

• 304/316 스테인레스 스틸: For general-purpose and sanitary applications

• 듀플렉스 및 슈퍼듀플렉스: For chloride-rich or seawater services

• 합금 20 / 하스텔로이 / 인코넬: For highly corrosive chemical environments

• 탄소강 (ASTM A105): For utility or general service

SASA FLANGE offers full traceability with MTCs and testing certifications for all materials used in instrumentation flange manufacturing.

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Considerations for Selecting Instrumentation Flanges

When choosing the right flange for instrumentation, 고려하다:

1. Process Pressure and Temperature: Match the flange rating to the instrument and process specifications.

2. Media Compatibility: Ensure material resists corrosion, scaling, or erosion caused by the process fluid.

3. Installation Environment: Threaded flanges may be better for hazardous zones; weld necks are better for high-stress areas.

4. Instrument Connection Type: Flange type must align with the instrument’s connection standard (NPT, BSPT, 맞대기 용접, 등.).

5. Maintenance and Calibration Access: Choose flange types that allow easy removal and reinstallation during instrument calibration.

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SASA FLANGE: Precision-Made Instrumentation Flanges

SASA FLANGE is your reliable source for high-precision flanges used in instrumentation. Our solutions are trusted by engineers in oil & 가스, 발전, 수처리, and chemical industries.

우리는 제공합니다:

• Full range of instrumentation flanges: 소켓 용접, 스레드, 용접 목, orifice, 그리고 장님

• 맞춤형 가공 for pressure taps, vent holes, and RTJ grooves

• Materials matched to process requirements with full certifications

• 빠른 배송 for standard and special-order flanges

Whether you are integrating a pressure transmitter in a high-pressure steam system or installing a flow meter in a corrosive slurry line, SASA FLANGE ensures leak-proof, 튼튼한, and code-compliant flange connections.

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결론

Instrumentation systems are only as reliable as the connections that support them. 옳은 선택 flange for instrumentation ensures accurate measurement, leak-free operation, and long-term durability.

By understanding the roles of different flange types—from threaded to orifice flanges—and considering pressure, 온도, media, and instrument compatibility, you can optimize your instrumentation system’s performance.

For engineered flange solutions that meet the highest standards, 로 향하다 SASA FLANGE—your trusted partner for precision and quality in every connection.