特徴	Standard Flange	Flange Blind Plate
Central Opening	はい	いいえ
目的	Connect pipes and components	Seal or close pipe ends
Flow Passage	Allows fluid flow	Blocks fluid flow
共通使用	Permanent or semi-permanent piping connections	Temporary or permanent pipe closure
応用	パンプス, バルブ, 肘, ティー	Ends of pipelines, ノズル
圧力試験	Not primarily used	Ideal for pressure testing systems
デザイン	With bore and gasket surface	Solid with full face or raised face
インストール	Welded or bolted to pipes	Bolted to pipe or flange end

Applications of Standard Flanges

Standard flanges are used throughout industrial piping systems to:

• Connect two pipe sections

• Allow the installation of valves, フィルター, or strainers

• Facilitate maintenance and inspection

• Accommodate thermal expansion or vibration

They are integral to systems requiring frequent assembly and disassembly.

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Applications of Flange Blind Plates

Flange blind plates are typically used when:

• Temporarily isolating a section of piping for maintenance

• Permanently sealing a dead-end in a pipeline

• 圧力試験 sections of piping systems or vessels

• Future expansion is expected but not yet installed

例えば, in petrochemical plants, a blind flange is placed at the end of a high-pressure line that might later connect to another process unit.

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Materials Used in Flanges and Blind Flanges

Both components are made using similar materials depending on application, のような:

• ステンレス鋼 (304, 316, 321, 等)

• 炭素鋼

• 合金鋼 (F11, F22, 等)

• デュプレックスとスーパーデュプレックス

• Nickel-based alloys

ササフランジ provides both standard and blind flanges in a wide range of materials, サイズ, 圧力クラス (ansi, DIN, JIS), and surface finishes.

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設置とメンテナンスに関する考慮事項

標準フランジ:

• Require proper gasket alignment

• Must be torqued in a star pattern

• Pipe sections must be well 整列した

• Suitable for frequent assembly/disassembly

Flange Blind Plates:

• Must match bolt pattern and pressure class

• Must be properly centered to avoid over-stressing bolts

• Often require thicker gaskets for tight sealing

• Used with reinforcement pads in high-pressure conditions

Both types require proper torque and gasket selection for leak-proof performance. ササフランジ recommends following ASME B16.5 またはEN 1092-1 standards for installation best practices.

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Pressure Rating and Strength

Blind flanges are often subject to higher internal pressure than standard flanges because they bear the full force of the pressurized medium.

Hence, flange blind plates:

• Are usually 厚い than regular flanges

• May include reinforcing ribs または raised face designs

• Are rated to match or exceed the pipe system’s maximum pressure

高圧システム用, choosing a well-machined blind flange from a trusted supplier like ササフランジ ensures long-term reliability.

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Which One Should You Use?

It depends entirely on the application: