Stainless Steel Blind Flange

A Stainless Steel Blind Flange is a solid disk-shaped flange used to seal off the ends of pipelines, valves, and pressure vessels. It provides a leak-proof closure, making it ideal for high-pressure and high-temperature applications. These flanges are widely used in industries such as oil & gas, chemical processing, power plants, water treatment, and pharmaceuticals.

Material Grades:

Stainless steel blind flanges are available in various grades to suit different applications and environmental conditions:

• SS 304  – General-purpose stainless steel with excellent corrosion resistance.
• SS 316  – Higher resistance to corrosion and chemicals, ideal for marine and chemical processing industries.

Standards & Specifications:

• Design & Manufacturing Standards:
  • ASME B16.5 (For flanges up to 24″)
  • ASME B16.47 Series A & B (For larger diameters)
  • API 605 (For oil and gas applications)
  • MSS-SP-44
  • DIN, JIS, EN, BS standards as per customer requirements
• Pressure Ratings:
  • ANSI / ASME Class 150, 300, 400, 600, 900, 1500, 2500
  • PN6, PN10, PN16, PN25, PN40, PN64, PN100

Types of Stainless Steel Blind Flanges:

1. Flat Face (FF) – Ensures full contact sealing, used in low-pressure applications.
2. Raised Face (RF) – Common in high-pressure applications, enhances sealing with a gasket.
3. Ring-Type Joint (RTJ) – Used for extreme pressure and temperature applications, with a precision groove for metal ring gaskets.

Key Features:

• Corrosion Resistance: Excellent resistance to rust, oxidation, and chemical exposure.
• High Strength & Durability: Withstands high-pressure applications without deformation.
• Leak-Proof Seal: Ensures a tight closure in pipelines.
• Wide Application Range: Suitable for high-temperature and cryogenic environments.
• Easy Installation & Removal: Can be bolted onto existing piping systems.

Applications:

• Oil & Gas Industry – Used in refineries, offshore drilling, and gas pipelines.
• Petrochemical & Chemical Plants – Ideal for chemical processing units handling corrosive substances.
• Power Plants – Used in high-pressure steam and cooling water systems.
• Water Treatment & Desalination Plants – Prevents contamination and leakage in water processing units.
• Pharmaceutical & Food Industry – Ensures sanitary and hygienic fluid handling.

Customization Options:

• Size Range: ½” (15mm) to 48” (1200mm) and above
• Thickness: As per ASME / DIN standards or customized
• Surface Finish: Mill finish, mirror finish, polished, or coated as per customer requirement
• Gasket Compatibility: Supports spiral wound, metal-jacketed, and ring gaskets
• Drilling Patterns: ANSI, API, DIN, and JIS drilling standards available