Kör Flanş Levhaları Hakkında Ne Biliyorsunuz??

Endüstriyel boru sistemlerinde, blind flange boards—commonly referred to as kör flanşlar—play a critical role in sealing pipe ends and ensuring the safety and integrity of fluid and gas transmission. These components are often overlooked but are indispensable in systems that require pressure testing, izolasyon, or future expansion capability.

This article explores everything you need to know about blind flange boards, including their structure, functions, malzemeler, endüstri standartları, ve uygulamalar. Whether you are a mechanical engineer, maintenance technician, or procurement manager, this guide will help you understand the value and proper use of blind flanges in modern infrastructure.

What Is a Blind Flange Board?

A blind flange board is a solid, disk-shaped component that has no central bore (hole). It resembles a standard flange but is completely sealed off in the center. It is bolted to the end of a pipe or fitting to block fluid or gas flow.

Temel Özellikler:

Round metal disk with bolt holes
No internal opening or passage
Often manufactured with raised face, düz yüz, veya RTJ (Halka Tipi Bağlantı)
Available in a wide range of sizes and pressure classes

A blind flange is commonly used where a piping system needs to terminate temporarily or permanently.

What Are Blind Flange Boards Used For?

Blind flanges serve several crucial functions in various industries:

1. Pipe End Sealing

They close off the end of a piping system, preventing the escape of media or pressure.

2. Basınç Testi

Blind flanges allow pressure tests to be conducted on newly installed pipelines or vessels.

3. Future Expansion Planning

They seal off open ends where future piping or equipment will be connected later.

4. Maintenance and Isolation

Used to isolate a section of the pipeline during shutdowns or repairs without disturbing the rest of the system.

Sasaflance provides blind flange boards in multiple pressure ratings (150 ile 2500 sınıf, PN10 to PN160) to suit a variety of operational conditions.

Blind Flange vs Other Flange Types

It’s essential to distinguish blind flanges from other common flange types:

Flange Type	Central Hole	Amaç
Kaynak Boyunlu	Evet	Permanent pipe connection
Slip-On	Evet	Easy to slide over pipe ends
Soket Kaynağı	Evet	For small diameter high-pressure pipes
Dişli	Evet	Connects to threaded pipes
Kucak Bağlantısı	Evet	Works with stub ends
Kör Flanş	HAYIR	Blocks the end of a pipe

Blind flanges are the only type designed specifically to seal off a piping system rather than allow flow through it.

Materials Used for Blind Flange Boards

The material selection depends on pressure, sıcaklık, and the nature of the fluid in the system:

Karbon çeliği (A105, A350 LF2) – For general service
Paslanmaz çelik (304, 316, 321) – For corrosion resistance
Alaşımlı çelik (F11, F22, F91) – For high temperature and pressure
Duplex/Super Duplex – For offshore and chemical applications
Nickel alloys (Hastelloy, İnkonel, Monel) – For highly corrosive environments

Sasaflance offers custom manufacturing services to supply blind flange boards that meet both standard and special material requirements, ensuring suitability for your application.

Industry Standards for Blind Flange Boards

Blind flanges are manufactured according to international standards such as:

ASME B16.5 – Pipe flanges and flanged fittings (½” to 24″)
ASME B16.47 A/B Serisi – Daha büyük çaplı flanşlar için (26″ 60'a kadar″)
EN 1092-1 – European standard
DIN 2527 – German blind flange standard
JIS B2220 – Japanese standard

Each standard specifies dimensions, basınç sınıfları, bakan türleri, and tolerance limits.

Pressure Ratings and Thickness

Blind flanges are subject to full internal pressure since there is no flow-through. Öyleyse, they are typically daha kalın than regular flanges of the same size and pressure class.

Basınç Sınıfları (ASME):

Sınıf 150
Sınıf 300
Sınıf 600
Sınıf 900
Sınıf 1500
Sınıf 2500

Blind flanges must be selected based on tasarım basıncı ve sıcaklığı to ensure safety and long-term performance.

Sealing Face Types

Blind flange boards come in several face types for compatibility with gaskets and pipe connections:

Yükseltilmiş Yüz (RF) – Standard for most process piping
Düz Yüz (FF) – Used where flanges are cast iron or non-metallic
Halka Tipi Bağlantı (RTJ) – For high-pressure applications with metal-to-metal seals

Choosing the correct face type ensures proper gasket compression and leak-proof sealing.

Advantages of Using Blind Flange Boards

Complete system isolation
Easy to install or remove
Low maintenance
Adaptable to different piping systems
Ideal for future system modification

With proper handling and installation, blind flanges offer a cost-effective and secure method to terminate or isolate pipelines.

Installation Guidelines

To install a blind flange board correctly:

Inspect sealing surfaces for damage or rust
Select appropriate gasket material for media and temperature
Use proper bolt torque sequence (yıldız deseni)
Tighten in stages to ensure even compression
Recheck bolt torque after system pressurization

Improper installation can lead to conta arızası veya flanş bükülmesi, resulting in leaks or blowouts.

Sasaflance recommends following ASME PCC-1 bolting standards for safe flange assembly practices.

Maintenance Tips

Inspect sealing face regularly for corrosion or dents
Replace gaskets during each reinstallation
Retorque bolts periodically in high-pressure or vibrating systems
Use protective covers when flanges are stored or idle

Routine maintenance prolongs flange life and enhances system reliability.

Why Choose sasaflange Blind Flange Boards?

Şu tarihte: Sasaflance, we specialize in the manufacture and global supply of high-quality blind flange boards:

Uyumluluk ASME, DIN, JIS, EN standartlar
Wide material selection, including stainless steel, alaşım, ve karbon çeliği
Custom machining for size, kalınlık, or special surface finishes
Corrosion-resistant coatings upon request
Fast delivery and export-ready packaging

İster bir boru hattı inşa ediyor olun, pressure vessel, or process system, Sasaflance ensures your blind flanges are precision-engineered for safety, kuvvet, ve performans.

Çözüm

Blind flange boards are more than just solid disks—they are crucial safety components in pressurized systems. They block flow, isolate systems, and enable testing and maintenance operations. With wide material options, high pressure ratings, and compatibility with global standards, blind flanges are indispensable in modern industrial systems.

When selecting or specifying blind flanges, dikkate almak malzeme uyumluluğu, basınç sınıfı, yüz tipi, ve standartlara uygunluk. For high-performance blind flange boards backed by expert support, güven Sasaflance—your reliable partner in industrial piping components.