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Style 5300 Obround Sight Windows Shipped to a California Engineering Company

  • May 7, 2022
  • 2 min read

Updated: Aug 6

We recently shipped eight Style 5300 Obround Sight Windows to an engineering company in California. These windows are a common specification for engineering firms designing custom process vessels and tanks that need reliable, code-compliant visual access.


What Are Obround Sight Windows?

Obround refers to the window's shape — an elongated oval, essentially a rectangle with rounded ends. This shape provides a wider field of view than a standard round sight window of comparable size, which is why engineering firms often specify obround designs when broader visual access to a vessel's interior is needed.


Style 5300 Specifications

Fabricated with code metals, the Style 5300 obround sight window is suitable for use on vessels conforming to ASME Code requirements. It's designed for:

  • Working Pressure: 150 PSI

  • Service Temperature: 500°F

This rating profile makes it well-suited for moderate-pressure process vessels and tanks across a range of industrial applications, without requiring the higher-rated (and typically more expensive) construction needed for high-pressure boiler or steam service.


Mounting Options

The Style 5300 can be specified with either:

Flat Welding Pads For attachment to flat-sided tanks or vessels.

Curved Welding Pads For insertion into or attachment to curved vessel walls, matching the vessel's radius for a proper fit and seal.

This flexibility allows the same window style to be specified across different vessel geometries without requiring a custom sight window design for each application.


Dual Window Configuration

Dual window units may also be specified for this style. A dual window configuration places two sight windows directly opposite each other on a vessel, allowing light to pass through from one side to the other. This is particularly useful for:

  • Improved visibility in vessels where a single window might not provide sufficient illumination of the interior

  • Applications requiring observation from a light source on one side while viewing from the other

  • Process verification where seeing straight through the vessel interior matters more than reflected-light viewing


Why Engineering Firms Specify This Window Style

Engineering companies designing custom process equipment need sight window options that are code-compliant out of the box, available with flexible mounting configurations, and rated appropriately for common moderate-pressure process applications. The Style 5300's combination of ASME code metal construction, 150 PSI / 500°F rating, and flexible welding pad and dual-window options makes it a practical specification for a wide range of custom vessel designs, rather than requiring a bespoke sight window solution for each project.


Applications

Obround sight windows like the Style 5300 are commonly used in:

  • Chemical Processing: Reactor and mixing vessel visual verification

  • Food & Beverage: Process tank observation

  • Pharmaceutical: Vessel monitoring in moderate-pressure applications

  • General Industrial: Custom-engineered tanks and vessels requiring code-compliant visual access

  • Engineering & Fabrication Firms: Standard specification for new vessel designs


Learn More

For specification details on Style 5300 Obround Sight Windows, including CAD drawings and configuration options, contact Clark-Reliance's Jacoby-Tarbox team.

📧 jacoby-tarbox@clark-reliance.com📞 +1 (440) 572-1500


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