Manhole Cover Flange Seat Ring Manufacturer

Manhole Cover Flange Seat Ring

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Tank Truck Accessories

Used in conjunction with manhole covers on tank trucks

Specifications

Nominal diameter: 16''/20''
Material: Aluminum alloy/Stainless steel/carbon steel
Installation: Flange/clamp
Temperature range: -40℃ to 70℃

Product Overview

The manhole cover flange seat ring is a structural component used in combination with manhole covers on tank trucks to form a secure, sealed mounting interface. It is typically rolled from plate material and is available in aluminum alloy, carbon steel, or stainless steel, depending on the tank construction and service requirements. Our flange seat rings are designed to match a wide range of manhole covers for petroleum transport applications. The overall installation height of the flange can be customized according to customer specifications. These rings support secure integration with manhole covers and comply with international standards including DOT 406 for tanker safety and compatibility.

Features

Tested for tensile strength and other demanding performance standards
Weld-resistant design prevents deformation during or after installation
Manufactured using one-piece forming technology for structural integrity
Compatible with PTFE, Viton (FKM), or NBR gaskets based on application requirements
ADR drop-test certified for use in fuel tanker systems

What is the difference between a manhole flange and a standard pipe flange?

A manhole flange is designed for equipment or compartment access and is often used in areas requiring frequent inspection or maintenance. Unlike standard pipe flanges, it prioritizes easy assembly/disassembly, making it ideal for use in industries such as petroleum, chemical processing, natural gas, power, metallurgy, pharmaceuticals, and food where tank or system access is essential.