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Oval Manhole Cover

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Paslanmaz Oval Menhol Kapak ve Tank Giriş Kapağı

What is a Stainless Steel Oval Manhole Cover?

A stainless steel oval manhole cover is a sealed access cover used in water, chemical, and food storage tanks for maintenance, cleaning, and filling operations. Made from AISI 304 and 316 grade stainless steel, these covers perfectly fit the tank surface (concave or convex) due to their oval shape. They are the ideal solution for safe use, especially in pressurized tanks.

Stainless Steel Manhole Cover Types

We offer different models depending on your project’s needs and the tank’s working pressure:

  • Pressurized Manhole Covers: Reinforced structure for reactors and tanks with high internal pressure.
  • Non-Pressurized Covers: Standard covers for water and milk tanks operating at atmospheric pressure.
  • Glass (Inspection) Covers: Designs with a glass section that allows viewing the inside of the tank without opening the cover.
  • Quick-Opening Covers: Practical models that can be opened and closed in seconds with a special hinge system.

Which Material Should Be Preferred?

The correct stainless steel grade should be selected for the manhole covers to be long-lasting:

  • AISI 304 Grade: Ideal for standard water tanks, milk tanks, and non-corrosive environments.
  • AISI 316 Grade: Provides superior resistance to corrosion for surfaces in contact with seawater, chemical acids, the pharmaceutical industry, and salty foods.

Production Process and Quality Standards

As Asinoks, we use the latest technology on our production line:

  • Millimetric precision with laser cutting.
  • Smooth and leak-proof joints with argon welding.
  • Hygienic surface polishing in accordance with food and drug regulations.
  • Leak-proof tests in ISO 9001 and CE standards.

Sectoral Usage Areas

Stainless steel manhole covers are widely used in the following areas where hygiene is critical:

  • Food Industry: Milk cooling tanks, fruit juice and beverage silos.
  • Chemical and Pharmaceutical: Reactor inlets and raw material storage tanks.
  • Water Treatment: Filtration tanks and wastewater systems.
  • Petrochemical: Fuel and solvent storage tanks.

Oval vs. Circular Cover Comparison

Feature Oval Manhole Cover Circular Manhole Cover
Sealing High (Tightens with pressure in inwardly opening models) Standard
Durability Stronger mechanical structure Medium level
Installation Compact design Standard flanged mounting
Usage Area Lateral surfaces, pressurized tanks Top surfaces, general storage

Advantages of Using Stainless Steel

  • Full Protection: Lifetime resistant to corrosion (rust).
  • Hygiene: Does not harbor bacteria, is easy to clean, and is suitable for food safety.
  • Aesthetics: Offers a modern and clean look, requires no maintenance.

Frequently Asked Questions

How durable is a stainless steel oval manhole cover?

Thanks to its stainless steel structure, it is extremely resistant to physical impacts, pressure, and corrosion. It can be used for years without requiring maintenance.

What material are the gaskets made of?

Depending on the area of use, 100% leak-proofness is ensured by using EPDM (Food Grade), Silicone (High Temperature) or PTFE/Teflon (Chemical) gaskets.

How do prices vary?

Pricing varies depending on the dimensions of the cover, the stainless steel grade (304/316), and the pressure resistance class.

Is custom-sized production available?

Yes. In addition to standard sizes, we also manufacture manhole covers in custom sizes suitable for the inlet of your existing tank.