플랜지는 배관 시스템에 없어서는 안 될 요소입니다., 설치를 위한 연결점 역할을 함, 유지, 그리고 검사가 더 쉬워졌습니다. 다양한 종류 중에서, 그만큼 블라인드 플랜지 plays a special role. Unlike weld neck or slip-on flanges, blind flanges do not have a bore and are used to seal off the ends of pipelines, 밸브, or pressure vessels.

When it comes to material selection, SS 316L blind flanges are one of the most widely used in industries dealing with corrosive environments. Known for their superior resistance to chemicals, 바닷물, and high-temperature conditions, these flanges are the backbone of critical applications in petrochemical, 선박, 제약, and food processing industries.

This expert guide explores everything you need to know about SS 316L blind flanges — their properties, 장점, 애플리케이션, manufacturing standards, and how to select the right product for your needs.

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1. 블라인드 플랜지란??

A blind flange is a solid disk that is bolted to a pipe or valve flange to block off a section of a pipeline or pressure vessel. Its primary purpose is to provide isolation for repair, 테스트, 또는 유지 보수.

Key Functions:

• Seals off unused pipeline branches.

• Allows pressure testing of piping systems.

• Provides easy access for future pipeline extensions.

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2. Why Choose SS 316L for Blind Flanges?

SS 316L is a low-carbon variation of stainless steel 316. 그만큼 “엘” 약자 “저탄소,” which enhances resistance to sensitization during welding and improves corrosion resistance.

Chemical Composition Highlights:

• 크롬: 16–18%

• 니켈: 10–14%

• 몰리브덴: 2–3%

• Low carbon: ≤0.03%

Benefits of SS 316L in Blind Flanges:

• 우수한 내식성: Especially against chlorides and seawater.

• 우수한 용접성: Reduced risk of carbide precipitation.

• 고강도: Retains mechanical properties even at elevated temperatures.

• 장수: Extended service life in aggressive environments.

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3. Properties of SS 316L Blind Flanges

• 부식 저항: Performs well in acidic, alkaline, and chloride-containing environments.

• Temperature Tolerance: Can operate in both cryogenic and high-temperature conditions.

• Non-magnetic: Retains non-magnetic properties in annealed condition.

• 내구성: Withstands pressure and stress, making it reliable in critical systems.

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4. Types of SS 316L Blind Flanges

While blind flanges are generally solid disks, variations exist depending on design:

• Flat face blind flange: Suitable for low-pressure piping systems.

• Raised face blind flange: Common in medium and high-pressure applications.

• Ring-type joint (RTJ) 블라인드 플랜지: Designed for high-pressure, high-temperature services with metal gaskets.

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5. Advantages of SS 316L Blind Flanges

1. Leak-proof sealing for pipeline ends.

2. Resistance to seawater corrosion, making them suitable for marine applications.

3. 다재 across industries from oil refineries to food processing.

4. Easy installation and removal for maintenance.

5. Compliance with international standards ensures safety and reliability.

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6. Manufacturing Standards

SS 316L blind flanges are manufactured according to recognized standards to ensure quality and compatibility:

• ASME B16.5: 파이프 플랜지 및 플랜지 피팅.

• ASME B16.47: Large diameter flanges.

• DIN/EN standards: Widely used in Europe.

• API 6A/6B: Applicable to oilfield flanges.

Certified manufacturers like SASAFLANGE ensure that their SS 316L blind flanges conform to these global standards.

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7. Applications of SS 316L Blind Flanges

석유 및 가스 산업

• Isolating sections of subsea and offshore pipelines.

• Used in refineries for high-pressure systems.

해양산업

• Ideal for shipbuilding due to resistance against seawater corrosion.

Chemical and Petrochemical

• Suitable for pipelines carrying acids, 알칼리, and other corrosive fluids.

식품 및 음료 가공

• Hygienic pipelines requiring corrosion resistance and easy cleaning.

Pharmaceutical and Biotech

• Critical systems demanding both corrosion resistance and sterility.

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8. Installation and Maintenance

설치 팁

• Ensure gasket selection matches the flange design (제기된 얼굴, RTJ, 등.).

• Apply uniform bolt torque to avoid uneven stress.

• Use anti-seize lubricants on bolts for easier disassembly.

유지 관리 관행

• Regular inspection for signs of wear or corrosion.

• Replace gaskets during reassembly to maintain leak-proof performance.

• Keep bolts tightened according to specifications.

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9. Comparison with Other Materials