DIN対ANSIフランジの違いは何ですか?

産業用配管システムにおいて, フランジはパイプを接続する際に重要な役割を果たします, バルブ, およびその他のコンポーネント. しかし, すべてのフランジが異なる地域で同じ規格に従っているわけではありません. Two of the most widely recognized standards in the world are DIN (ドイツ標準化研究所) そして ansi (米国規格協会). Understanding the differences between DIN and ANSI flanges is essential for ensuring compatibility, 安全性, and efficiency in global engineering projects.

この記事では, we break down the key differences between DIN and ANSI flange systems and help you decide which standard best fits your application. Provided by ササフランジ, your global supplier of standardized and custom flange solutions.

What Is a DIN Flange?

DIN flanges are designed according to German and European specifications. These standards are widely used across Europe, アジア, and parts of South America. DIN flanges are typically specified under the EN (ヨーロッパの標準) standard series, such as EN 1092-1.

DIN flanges are defined by:

Nominal pressure ratings (PN): PN6, PN10, PN16, PN25, PN40, 等.
Metric measurements
Design based on bar pressure at a reference temperature (usually 20°C)

ササフランジ supplies high-quality DIN flanges that comply with EN and ISO standards, ensuring proper fit and reliable performance in European-standardized systems.

What Is an ANSI Flange?

ANSI flanges, often also referred to as ASME flanges (due to ASME B16.5 being the governing standard), are based on American specifications. These flanges are commonly used in North America and in countries with U.S.-based industrial systems.

ANSI flanges are characterized by:

圧力クラス: 150, 300, 600, 900, 1500, そして 2500
Imperial (inch-based) measurements
Design pressure and temperature considerations based on materials

ササフランジ offers a complete range of ANSI/ASME B16.5 flanges manufactured with high precision and certified for international industrial use.

DIN フランジと ANSI フランジの主な違い

1. Measurement Units

DIN uses the metric system: dimensions are in millimeters
ansi uses the imperial system: dimensions are in inches

This difference affects bolt hole sizes, flange diameters, and thicknesses—making them generally incompatible without adapters.

2. Pressure Rating Systems

DIN flanges are categorized by PN ratings (公称圧力), 例えば, PN10, PN16, PN40
ansi flanges are classified by Class ratings, 例えば, クラス 150, 300, 600

These systems are not directly interchangeable, as PN and Class refer to different test parameters and do not align numerically.

3. Design Standards

DIN flanges follow EN 1092-1 and related norms
ANSI flanges follow ASME B16.5 そして ASME B16.47 (大きいサイズ用)

Each system has its own rules for flange face types, 寸法, and tolerances, which means fittings and gaskets designed for one standard typically won’t match the other.

ササフランジ provides both DIN and ANSI flanges with correct gaskets and bolt sets to ensure reliable sealing.

4. Face Types

Both DIN and ANSI standards use common face types like:

盛り上がった顔 (RF)
平面 (FF)
リング型ジョイント (RTJ)

しかし, the design height and surface finish may vary, especially in high-pressure applications, requiring proper matching during system assembly.

5. Applications and Usage Regions

DIN flanges are common in ヨーロッパ, アジア, and Africa, especially in water, 空調設備, および化学システム
ANSI flanges are dominant in North America, Latin America, and globally in 油, ガス, および石油化学産業

Knowing your project’s regional requirements helps determine which flange standard to use.

Can You Interchange DIN and ANSI Flanges?

Generally, DIN and ANSI flanges are not interchangeable due to differences in dimensions, ボルトパターン, および圧力定格. Attempting to connect mismatched flanges may lead to:

Improper sealing
Pressure loss or failure
Safety hazards and system damage

しかし, ササフランジ can supply custom adapters or transition flanges to bridge DIN-to-ANSI connections when required.

Materials and Surface Finishes

Both standards allow the use of various materials such as:

炭素鋼
ステンレス鋼
合金鋼
二重およびスーパー二重

Surface finishes also follow specific roughness parameters to ensure tight sealing with gaskets. で ササフランジ, we maintain strict quality control over machining finishes to meet both DIN and ANSI criteria.

Quality Assurance and Certification

ササフランジ offers full certification for both flange types, 含む:

EN 10204 3.1 材料試験証明書
PED, CE, そして ISO 9001 approvals for European markets
ASME and ASTM certifications for American standards

This ensures that no matter which system you use, you’re receiving fully traceable and compliant components.

Choosing the Right Flange Standard

When planning your piping system, ask the following:

Where will the equipment be installed? (Region and legal requirements)
Are you replacing or expanding an existing system? (Match existing flanges)
What pressure and temperature will the system operate under?
Do other connected components follow DIN or ANSI?

Still unsure? The team at ササフランジ is ready to assist with technical drawings, conversion support, and flange matching recommendations.

結論

の differences between DIN and ANSI flanges go beyond simple measurements—they impact every part of system design, pressure capacity, and global compatibility. Whether you’re working on an industrial project in Europe, the U.S., or globally, understanding these distinctions is key to avoiding costly installation issues.

ササフランジ is your trusted partner in supplying both DIN and ANSI standard flanges, アダプター, and custom flange solutions. With global expertise, 速い配達, and precise engineering, ササフランジ ensures your pipeline connections are safe, 強い, and standard-compliant.

選ぶ ササフランジ—where global flange standards come together seamlessly.