블라인드 플랜지 보드에 대해 무엇을 알고 있습니까??

산업용 배관 시스템, blind flange boards—commonly referred to as 블라인드 플랜지—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, 격리, or future expansion capability.

This article explores everything you need to know about blind flange boards, including their structure, functions, 재료, 업계 표준, and applications. 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?

에이 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.

주요 특징:

Round metal disk with bolt holes
No internal opening or passage
Often manufactured with raised face, 평평한 얼굴, 또는 RTJ (링형 조인트)
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. 압력 테스트

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.

SASAFLANGE provides blind flange boards in multiple pressure ratings (150 에게 2500 수업, 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:

플랜지 유형	Central Hole	Purpose
용접 목	예	Permanent pipe connection
슬립온	예	Easy to slide over pipe ends
소켓 용접	예	For small diameter high-pressure pipes
스레드	예	Connects to threaded pipes
랩조인트	예	Works with stub ends
블라인드 플랜지	아니요	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, 온도, and the nature of the fluid in the system:

탄소강 (A105, A350 LF2) – For general service
스테인레스 스틸 (304, 316, 321) – For corrosion resistance
합금강 (F11, F22, F91) – For high temperature and pressure
듀플렉스/슈퍼듀플렉스 – For offshore and chemical applications
니켈 합금 (하스텔로이, 인코넬, 모넬) – For highly corrosive environments

SASAFLANGE 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 – 파이프 플랜지 및 플랜지 피팅 (½” 24까지″)
ASME B16.47 시리즈 A/B – For larger diameter flanges (26″ 60까지″)
EN 1092-1 – European standard
DIN 2527 – German blind flange standard
JIS B2220 – Japanese standard

Each standard specifies dimensions, 압력 등급, 직면 유형, and tolerance limits.

Pressure Ratings and Thickness

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

Pressure Classes (ASME):

수업 150
수업 300
수업 600
수업 900
수업 1500
수업 2500

Blind flanges must be selected based on 설계 압력 및 온도 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:

제기된 얼굴 (RF) – Standard for most process piping
편평한 얼굴 (FF) – Used where flanges are cast iron or non-metallic
링형 조인트 (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.

설치 지침

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 (별 패턴)
Tighten in stages to ensure even compression
Recheck bolt torque after system pressurization

Improper installation can lead to 개스킷 고장 또는 flange warping, resulting in leaks or blowouts.

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

유지 관리 팁

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?

~에 SASAFLANGE, we specialize in the manufacture and global supply of high-quality blind flange boards:

Compliance with ASME, DIN, JIS, EN 표준
Wide material selection, including stainless steel, 합금, 그리고 탄소강
Custom machining for size, 두께, or special surface finishes
Corrosion-resistant coatings upon request
Fast delivery and export-ready packaging

Whether you’re building a pipeline, pressure vessel, or process system, SASAFLANGE ensures your blind flanges are precision-engineered for safety, 힘, 성능.

결론

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, 고려하다 재료 호환성, 압력 등급, 얼굴형, 및 표준 준수. For high-performance blind flange boards backed by expert support, 신뢰하다 SASAFLANGE—your reliable partner in industrial piping components.