ميزة	Standard Flange	Flange Blind Plate
Central Opening	نعم	لا
غاية	Connect pipes and components	Seal or close pipe ends
Flow Passage	Allows fluid flow	Blocks fluid flow
Common Use	Permanent or semi-permanent piping connections	Temporary or permanent pipe closure
طلب	مضخات, الصمامات, المرفقين, المحملات	Ends of pipelines, الفوهات
اختبار الضغط	Not primarily used	Ideal for pressure testing systems
تصميم	With bore and gasket surface	Solid with full face or raised face
تثبيت	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, المرشحات, 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

• اختبار الضغط sections of piping systems or vessels

• Future expansion is expected but not yet installed

على سبيل المثال, 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, مثل:

• الفولاذ المقاوم للصدأ (304, 316, 321, إلخ.)

• الصلب الكربوني

• سبائك الصلب (F11, F22, إلخ.)

• دوبلكس وسوبر دوبلكس

• Nickel-based alloys

ساسا مستطيل provides both standard and blind flanges in a wide range of materials, الأحجام, فئات الضغط (أنسي, DIN, JIS), and surface finishes.

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اعتبارات التثبيت والصيانة

Standard Flanges:

• Require proper gasket alignment

• Must be torqued in a star pattern

• Pipe sections must be well الانحياز

• 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. ساسا مستطيل recommends following ASME B16.5 أو إن 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.

لذلك, flange blind plates:

• Are usually أكثر سمكا than regular flanges

• May include reinforcing ribs أو raised face designs

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

For high-pressure systems, choosing a well-machined blind flange from a trusted supplier like ساسا مستطيل ensures long-term reliability.

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Which One Should You Use?

It depends entirely on the application: