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스레드 플랜지에 대해 알아야 할 모든 것

스레드 플랜지는 파이프 연결을 위해 다양한 산업에서 사용되는 중요한 유형의 파이프 플랜지입니다., 밸브, 용접이 필요없는 기타 장비. Their design allows for a secure, leak-resistant joint by using internal threads that match the external threads of the pipe. This makes them especially valuable in systems where welding is impractical or undesirable due to safety, 재료, or operational constraints.

이 기사에서는, we will cover what threaded flanges are, 그들의 이점, 애플리케이션, 재료, 압력 등급, installation best practices, and how they compare with other flange types.

What is a Threaded Flange?

A threaded flange, also known as a screwed flange, is a type of flange with an internal thread. This thread matches the external thread of the connecting pipe, enabling the two components to be joined without welding.

Key characteristics:

  • Available in sizes typically from NPS 1/2″ to NPS 24″.

  • Designed according to standards like ASME B16.5.

  • Suitable for low-pressure and non-cyclic service conditions.

  • Easy to assemble and disassemble.

Advantages of Threaded Flanges

1. No Welding Required

  • Ideal for applications where welding is risky, such as explosive environments.

  • Prevents heat-related damage to pipe material.

2. 설치 용이성

  • Can be installed quickly with basic tools.

  • No need for specialized welding equipment or personnel.

3. 재사용성

  • Can be removed and reused without damage, reducing replacement costs.

4. Minimal Heat Distortion

  • Since no welding is involved, there is no risk of heat-induced warping.

5. 다재

  • Works well with galvanized, 놋쇠, or other materials sensitive to welding.

Limitations of Threaded Flanges

While threaded flanges offer many benefits, they have limitations:

  • Not ideal for high-pressure, 고온, or cyclic load applications.

  • Threads may become worn or damaged over time.

  • More prone to leakage compared to welded connections if not properly installed.

Common Applications of Threaded Flanges

  1. Small-Diameter Piping Systems

    • Ideal for pipe sizes typically less than NPS 2.

  2. Hazardous Environments

    • Used where welding could create a fire or explosion risk.

  3. Temporary Installations

    • Easily removable for system changes or maintenance.

  4. Utility Piping

    • Often used in water, 공기, and non-hazardous fluid systems.

  5. 해양 및 해양

    • Suitable for low-pressure seawater systems.

Threaded Flange Design Features

  • Bore with Internal Threads – Matches external threads of the pipe.

  • 제기된 얼굴 (RF) or Flat Face (FF) – Common facing options.

  • Bolt Holes on Flange Rim – For secure connection to mating flanges.

  • Standard Pressure Ratings – Commonly Class 150 및 클래스 300.

Materials for Threaded Flanges

Threaded flanges are available in a wide range of materials to meet specific application needs:

재료 유형 장점 Common Applications
탄소강 비용 효율적, good strength General industrial
스테인레스 스틸 내식성, 위생 음식, 화학적인
합금강 High strength and heat resistance High-temp service
Brass/Bronze Excellent for water and non-corrosive applications 선박, plumbing
니켈 합금 Excellent chemical resistance 화학공장

Pressure-Temperature Ratings

Threaded flanges are typically used in lower pressure classes:

  • 수업 150: General service, up to ~285 psi at 100°F.

  • 수업 300: Higher pressure capacity, up to ~740 psi at 100°F.

For high-pressure applications, other flange types like weld neck or socket weld are preferred.

Installation Best Practices

  1. Thread Matching

    • Ensure pipe and flange threads are compatible (NPT or BSP standards).

  2. Thread Sealant

    • Use PTFE tape or pipe dope for leak prevention.

  3. 조정

    • Properly align to prevent stress on threads.

  4. 토크

    • Avoid over-tightening to prevent cracking or distortion.

  5. 점검

    • Check threads for wear or damage before installation.

Threaded Flange vs. 기타 플랜지 유형

특징 스레드 플랜지 용접 목 플랜지 슬립온 플랜지
Welding Required 아니요 예 예
압력 등급 Low to Medium Medium to High Low to Medium
설치 Easy, quick 더 복잡함 보통의
재사용성 높은 낮은 낮은

Standards for Threaded Flanges

  • ASME B16.5 – Most common for sizes up to NPS 24.

  • BS 4504 / EN 1092-1 – European standards for metric dimensions.

  • JIS B2220 – Japanese standards for threaded flange dimensions.

Industries That Use Threaded Flanges

  • 기름 & 가스 (low-pressure lines, temporary connections)

  • 수처리

  • 식품 가공

  • HVAC 시스템

  • Marine Applications

Why Quality Matters in Threaded Flanges

The performance of threaded flanges heavily depends on manufacturing precision and material quality. Working with a trusted supplier like SASAFLANGE ensures:

  • Dimensional accuracy for leak-free connections.

  • Compliance with ASME and international standards.

  • High-quality threading for long service life.

  • Availability in multiple materials and sizes.

Maintenance Tips for Threaded Flanges

  • Regular Inspection: Look for thread wear or damage.

  • Proper Sealing: Always use thread sealants to avoid leakage.

  • Avoid Over-Torquing: Prevents cracking of the flange hub.

  • Clean Threads: Remove dirt, 기름, or old sealant before installation.

결론

Threaded flanges offer a convenient, 비용 효율적, and welding-free solution for connecting piping systems, especially in low-pressure and hazardous environments. Their reusability, ease of installation, and compatibility with various materials make them an excellent choice for specific applications in construction, industrial, 해양 부문.

By sourcing from a reputable supplier like SASAFLANGE, you can ensure your threaded flanges meet the highest quality standards, providing reliable and long-lasting performance for your projects.

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