Stainless Steel Flanged Manhole Cover

Stainless Steel Flanged Manhole Cover

Product Overview

The Stainless Steel Flanged Manhole Cover is a heavy-duty access solution designed for industrial pressure vessels, storage tanks, and reactors. Unlike clamp-style covers, this unit features a robust flanged connection that is bolted directly to a mating flange on the vessel nozzle. This design provides exceptional structural strength and a secure, leak-tight seal capable of withstanding higher internal pressures and vacuum conditions. Manufactured from high-grade stainless steel, it is the preferred choice for applications requiring rigorous safety standards and long-term durability in corrosive environments.

Key Features and Benefits

• High-Pressure Integrity: The flanged and bolted design ensures a uniform seal load, making it suitable for high-pressure and high-vacuum applications where clamp-type covers may be insufficient.

• Superior Corrosion Resistance: Constructed from ASTM A240 304/304L or 316/316L stainless steel, offering excellent resistance to chemical attack, oxidation, and rust.

• Customizable Sealing: Compatible with a wide range of gasket materials (EPDM, Silicone, PTFE, Viton) to suit specific process media and temperature requirements.

• Safety & Stability: The bolted flange connection prevents accidental dislodgement due to internal pressure surges, ensuring operator safety during operation.

• Versatile Finishes: Available with mill finish for general industrial use or electropolished/mirror finishes for sanitary and pharmaceutical applications.

Technical Specifications

• Product Name: Stainless Steel Flanged Manhole Cover

• Material Grades: 304, 304L, 316, 316L, Duplex 2205, 2507.

• Size Range: DN300 (12") to DN800 (32") and larger upon request.

• Pressure Ratings: PN6, PN10, PN16, PN25, ANSI 150, ANSI 300.

• Flange Standards: ASME B16.5, EN 1092-1, DIN 2633, JIS B2220.

• Surface Finish: Ra ≤ 0.8µm (Polished), Ra ≤ 0.4µm (Mirror), or Mill Finish.

• Gasket Options: EPDM, NBR, Silicone, FPM (Viton), PTFE.

Applications

The Stainless Steel Flanged Manhole Cover is widely used in industries requiring secure and reliable vessel access:

• Chemical & Petrochemical: Reactors and storage tanks handling aggressive solvents and high-pressure fluids.

• Pharmaceutical & Biotechnology: Fermenters and mixing tanks requiring sterile, cleanable access points (often with polished finishes).

• Food & Beverage: Large brewing tanks and food processing vessels where hygiene and pressure resistance are critical.

• Power Generation: High-pressure steam drums and water treatment vessels.

• Marine & Offshore: Ballast tanks and chemical carriers requiring corrosion-resistant access.

Quality Assurance

We adhere to strict manufacturing protocols to ensure the safety and reliability of every flanged cover. Our production process includes material verification, dimensional inspection of flange faces, and pressure testing. We provide full traceability and documentation, including EN 10204 3.1 Mill Test Certificates, to guarantee compliance with ASME, PED, and other international standards.