15 Agustus 20250 Komentar

Semua yang Perlu Anda Ketahui Tentang Flensa Berulir

Flensa berulir adalah jenis flensa pipa penting yang digunakan di berbagai industri untuk menyambung pipa, katup, dan peralatan lainnya tanpa perlu pengelasan. 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, bahan, or operational constraints.

Dalam artikel ini, we will cover what threaded flanges are, manfaat mereka, aplikasi, bahan, peringkat tekanan, praktik terbaik instalasi, 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″ ke NPS 24″.

  • Designed according to standards like ASME B16.5.

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

  • Mudah dirakit dan dibongkar.

Keuntungan Flensa Berulir

1. Tidak diperlukan pengelasan

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

  • Prevents heat-related damage to pipe material.

2. Kemudahan Instalasi

  • Can be installed quickly with basic tools.

  • No need for specialized welding equipment or personnel.

3. Reusability

  • 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. Keserbagunaan

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

Limitations of Threaded Flanges

While threaded flanges offer many benefits, they have limitations:

  • Not ideal for high-pressure, suhu tinggi, 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, udara, and non-hazardous fluid systems.

  5. Kelautan dan Lepas Pantai

    • Suitable for low-pressure seawater systems.

Threaded Flange Design Features

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

  • Wajah Terangkat (Federasi Rusia) atau Wajah Datar (FF) – Common facing options.

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

  • Standard Pressure Ratings – Commonly Class 150 dan Kelas 300.

Materials for Threaded Flanges

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

Jenis Bahan Keuntungan Aplikasi Umum
Baja Karbon Hemat biaya, good strength General industrial
Baja Tahan Karat Ketahanan korosi, higienis Makanan, kimia
Baja Paduan High strength and heat resistance High-temp service
Brass/Bronze Excellent for water and non-corrosive applications Laut, plumbing
Paduan Nikel Excellent chemical resistance Pabrik kimia

Peringkat Tekanan-Suhu

Threaded flanges are typically used in lower pressure classes:

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

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

Untuk aplikasi tekanan tinggi, other flange types like weld neck or socket weld are preferred.

Praktik Terbaik Instalasi

  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. Penyelarasan

    • Properly align to prevent stress on threads.

  4. Torsi

    • Avoid over-tightening to prevent cracking or distortion.

  5. Inspeksi

    • Check threads for wear or damage before installation.

Threaded Flange vs. Jenis Flensa Lainnya

Fitur Flensa Berulir Flensa Leher Las Flensa Selip
Welding Required TIDAK Ya Ya
Peringkat Tekanan Rendah hingga Sedang Sedang hingga Tinggi Rendah hingga Sedang
Instalasi Mudah, quick More complex Sedang
Reusability Tinggi Rendah Rendah

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

  • Minyak & Gas (low-pressure lines, temporary connections)

  • Pengolahan Air

  • Food Processing

  • Sistem HVAC

  • Aplikasi Kelautan

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 sasa lonjong memastikan:

  • 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

  • Inspeksi Reguler: 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, minyak, or old sealant before installation.

Kesimpulan

Threaded flanges offer a convenient, hemat biaya, 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, dan sektor kelautan.

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

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