플랜지는 파이프를 연결하는 데 사용되는 필수 구성 요소입니다., 밸브, 슬리퍼, 다양한 산업 시스템의 기타 장비. 안전을 확보하기 위해, 호환성, 성능, flanges are designed and manufactured according to internationally recognized standards such as ASME B16.5, EN 1092-1, DIN, JIS, and others.

Understanding flange standards requires familiarity with several key parameters. 그 중, three critical parameters determine the functionality and interchangeability of flanges: 압력 등급, 얼굴형, 그리고 치수 공차. These parameters not only affect the mechanical integrity of the flange but also dictate how well it mates with piping systems.

이 기사에서는, we will explore these three important parameters in detail and explain why they are essential for manufacturers, 엔지니어, 및 조달 전문가.

Company Logo: SASAFLANGE

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Parameter 1: 압력 등급 (클래스 또는 PN)

What is Pressure Rating?

The pressure rating of a flange indicates the maximum pressure it can withstand under specified temperature conditions. It is a critical factor in ensuring the safety and durability of a piping system.

Depending on the standard used, pressure ratings are represented differently:

• ASME/ANSI: 수업 150, 300, 600, 900, 1500, 그리고 2500

• 하나/당신의: PN 6, PN 10, PN 16, PN 25, PN 40, PN 64, 등.

Why Pressure Rating Matters

Choosing the correct pressure class ensures the flange can resist system pressure without deformation, 누출, or failure. If the pressure rating is too low, it can result in catastrophic consequences including pipe rupture, environmental contamination, or injury.

Factors Influencing Pressure Rating

• 재료 등급: 스테인레스 스틸, 탄소강, and duplex have different pressure capacities.

• 온도: Higher temperatures lower the effective pressure resistance.

• 설계: 두께, 볼트 패턴, and face type influence pressure class.

Pressure Rating Example

A클래스 150 flange made from stainless steel may handle a maximum of 19.6 bar at 100°F, but this drops significantly as temperature increases. 비슷하게, a PN40 flange is rated for 40 술집 under ambient conditions, but the actual performance depends on the material and temperature.

sasaflange provides pressure-tested flanges across all classes and PN levels, in compliance with ASME and EN specifications.

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Parameter 2: Flange Face Type

What is Flange Face Type?

The flange face is the sealing surface that comes in contact with a gasket to form a leak-proof seal. There are several types of flange faces, each suited for different applications and pressure ratings.

Common Face Types

1. 제기된 얼굴 (RF)

   • Most common face type

   • Raised ring around the bore

   • Compatible with flat or spiral wound gaskets

   • Found in ASME and EN flanges

2. 편평한 얼굴 (FF)

   • Entire flange face is flat

   • Used in low-pressure systems and with cast iron

   • Gasket must cover the full face

3. 링형 조인트 (RTJ)

   • Grooved face with metal ring gasket

   • 고압, high-temperature systems

   • Requires precise machining

4. 혀와 그루브 / Male and Female

   • Specialized face types for alignment-sensitive systems

   • Often used in heat exchangers

Why Face Type Matters

• Ensures leak-tight sealing under pressure

• Affects gasket selection and installation

• Influences assembly time and cost

• Incompatible face types can lead to misalignment or leakage

sasaflange supplies flanges with all major face types, machined to high precision for dependable gasket performance and system reliability.

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Parameter 3: Dimensional Tolerances

What Are Dimensional Tolerances?

Dimensional tolerance refers to the allowable deviation from nominal measurements in a flange’s size. These include:

• 외경 (의)

• 볼트 원 직경 (BCD)

• Number and position of bolt holes

• Bore diameter

• Hub dimensions

• 두께

• Face height

Standards define acceptable limits for each dimension to ensure flanges from different manufacturers can mate correctly.

Importance of Dimensional Tolerances

• 호환성: Components from different suppliers must fit perfectly

• Sealing integrity: Incorrect bolt alignment can damage gaskets

• 안전: Mismatched flanges can leak or fail under pressure

• 설치 용이성: Precision speeds up alignment and bolting

Dimensional Control in Practice

사사플랜지에게, all flanges are CNC machined and go through strict dimensional inspections. Precision tools such as calipers, coordinate measuring machines (CMM), and laser scanners are used to verify:

• Flange OD and thickness

• Bolt hole pitch circle diameter and spacing

• Bore alignment with mating pipe

• Face flatness and perpendicularity

All dimensions conform to tolerances outlined in ASME B16.5, ASME B16.47, 그리고 EN 1092-1.

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Interrelation Between the Parameters

These three parameters are interdependent. 예를 들어:

• A higher 압력 등급 often requires a 제기된 얼굴 또는 RTJ face to handle gasket stress.

• Tighter 치수 공차 에 매우 중요합니다 RTJ flanges to ensure a perfect metal-to-metal seal.

• Different face types require specific bolt circle dimensions and gasket sizes.

Failing to consider one parameter can undermine the performance of the other two. That’s why professional suppliers like sasaflange emphasize holistic flange engineering rather than treating each factor in isolation.

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How to Specify a Flange Correctly

When sourcing a flange, it is essential to specify all three parameters accurately:

1. 압력 등급: Based on system pressure and temperature

2. Face type: Depending on gasket type and sealing performance required

3. Dimensional standard and tolerance: To ensure compatibility with existing equipment

Example specification:

• ASME B16.5, 수업 300, 4-inch Weld Neck Flange, RF Face, 스테인레스 스틸 316L

sasaflange helps customers define these parameters during the design and procurement process to ensure smooth project execution.

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결론

Understanding the three most important parameters in flange standards—압력 등급, 얼굴형, 그리고 치수 공차—is critical for safe, 효율적인, and reliable piping system operation.

These parameters not only ensure that flanges perform under pressure but also allow for compatibility between components sourced from different manufacturers and countries.

sasaflange specializes in the production and supply of standard and custom stainless steel flanges. With strict quality control, 치수 정확도, and full documentation support, we help clients meet the toughest project requirements across the globe.