15 Ağustos 20250 Yorum

Dişli Flanşlar Hakkında Bilmeniz Gereken Her Şey

Dişli flanşlar, çeşitli endüstrilerde boruları bağlamak için kullanılan önemli bir boru flanşı türüdür., vanalar, ve diğer ekipmanlara kaynak gerektirmeden. 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, malzeme, or operational constraints.

Bu makalede, we will cover what threaded flanges are, their benefits, uygulamalar, malzemeler, basınç değerleri, 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″ NPS 24'e″.

  • Designed according to standards like ASME B16.5.

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

  • Montajı ve sökülmesi kolaydır.

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. Kurulum Kolaylığı

  • Can be installed quickly with basic tools.

  • No need for specialized welding equipment or personnel.

3. Yeniden kullanılabilirlik

  • Can be removed and reused without damage, değiştirme maliyetlerini azaltmak.

4. Minimal Heat Distortion

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

5. Çok yönlülük

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

Limitations of Threaded Flanges

While threaded flanges offer many benefits, they have limitations:

  • Not ideal for high-pressure, yüksek sıcaklık, 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, hava, and non-hazardous fluid systems.

  5. Denizcilik ve Açık Deniz

    • Suitable for low-pressure seawater systems.

Threaded Flange Design Features

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

  • Yükseltilmiş Yüz (RF) veya Düz Yüz (FF) – Common facing options.

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

  • Standard Pressure Ratings – Commonly Class 150 ve Sınıf 300.

Materials for Threaded Flanges

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

Malzeme Türü Avantajları Ortak Uygulamalar
Karbon Çelik Uygun maliyetli, good strength General industrial
Paslanmaz çelik Korozyon direnci, hijyenik Yiyecek, kimyasal
Alaşımlı Çelik High strength and heat resistance High-temp service
Brass/Bronze Excellent for water and non-corrosive applications Deniz, plumbing
Nikel Alaşımları Excellent chemical resistance Kimyasal tesisler

Basınç-Sıcaklık Değerleri

Threaded flanges are typically used in lower pressure classes:

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

  • Sınıf 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.

Kurulum İçin En İyi Uygulamalar

  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. Hizalama

    • Properly align to prevent stress on threads.

  4. Torque

    • Avoid over-tightening to prevent cracking or distortion.

  5. Denetleme

    • Check threads for wear or damage before installation.

Threaded Flange vs. Other Flange Types

Özellik Dişli Flanş Kaynak Boyunlu Flanş Geçmeli Flanş
Welding Required HAYIR Evet Evet
Basınç Değeri Düşük ila Orta Orta ila Yüksek Düşük ila Orta
Kurulum Kolay, quick More complex Ilıman
Yeniden kullanılabilirlik Yüksek Düşük Düşük

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

  • Yağ & Gaz (low-pressure lines, temporary connections)

  • Su Arıtma

  • Food Processing

  • HVAC Sistemleri

  • Denizcilik Uygulamaları

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 Sasaflance sağlar:

  • 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

  • Düzenli Muayene: Look for thread wear or damage.

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

  • Aşırı Torklamadan Kaçının: Prevents cracking of the flange hub.

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

Çözüm

Threaded flanges offer a convenient, uygun maliyetli, 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, ve denizcilik sektörleri.

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

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