Providing the Energy Industry with
Isolation Piping Products

Reducing Flanges

Crowded situations may necessitate the use of the reducing flange because it has a shorter overall length when compared to a weld neck flange and reducer-fitting configuration. Be advised … the flow should travel from the smaller size to the larger. If the flow were reversed, severe turbulence could develop. ScienceDirect

When it’s necessary to make a size adjustment (reduction) in a pipe, you’ll need a reducing flange to make the change from larger to smaller. With more than 40 years in the industry, Hydro Blind Solutions is a global provider and industry leader.

It’s a simple concept with a huge delivery. Reducing flanges are used to make the transition from larger to smaller piping, and they work well in confined spaces. We can guarantee 24-hour delivery.

Advantages of Reducing Flanges

The biggest advantage of reducing flanges is that piping can be assembled without welding. Painting and blasting aren’t necessary. Reducing flanges are easier to bolt and offer a simple solution.

  • Reducing flanges are the most cost-effective way to unite different-sized flanges.
  • They are available in several styles and pressures.
  • They can be used to size down pipe-to-pipe connections.

Applications for Reducing Flanges

Reducing flanges are used for any project that requires different sizes of pipes or lines. This tool is most often used for gas, oil, and water pipelines.

A reducing flange is often used in:

Types of Reducing Flanges

There are several types of reducing flanges. The most common are:

  • Blinds – These are basically flanges without a “hub” or bored middle.
  • Figure 8 blinds – Sometimes called “line blanks,” these are a pair of attached metal discs used to provide positive isolation.
  • Hydro paddle blinds – Use these when a perfect seal is necessary in a pressurized system.
  • Paddle blinds – These are also called line, pancake, skillet, slip, or spade blinds. A paddle blind is the sold half of a spectacle blind and usually has a “handle.”
  • Spectacle blinds – SBs are safety applications to isolate a section of a pipe or line for service removal. They are usually a permanent installation.
  • Vented paddle blinds – These block the flow on one side of a blind while allowing for pressure release on the other side. This makes for safer downstream work.
  • Weld-neck – These have a tapered hub to gradually change the size of a fitting or pipe.

MTRs (materials test reports) are available by request. Hydro Blind Solutions can provide for purchase or rental:

  • ASME B16.48 hydro paddle/slip/spade blind
    • A516-70 carbon steel paddle/slip/spade blind
    • 304/304L stainless steel paddle/slip/spade blind
    • 316/316L stainless steel paddle/slip/spade blind
  • ASME B16.48 vented paddle blind (rental)
    • A516-70 carbon steel vented paddle blind (rental)
  • Isolation paddle/slip/spade blind (5/16″)
    • A516-70 paddle/slip/spade blind
  • ASME B16.48 figure 8/spectacle blind (rental)
    • A516-70 carbon steel figure 8/spectacle blind (rental)
    • 304/304L stainless steel figure 8/spectacle blind (rental)
    • 316/316L stainless steel figure 8/spectacle blind (rental)
  • ANSI B16.5 blind flanges
    • A105 raised-face carbon steel blind flange
    • A105 RTJ carbon steel blind flange
  • ASME B16.47 series A & B blind flanges
    • A105 raised-face carbon steel series A & B blind flange
  • ASME B16.48 blind spacer sets (paddle/spacer)

… and we can design and engineer customized products quickly.

Hydro Blind Solutions: We Believe Your Knowledge Is Power

We want to partner with you to keep your project within budget and on time. It doesn’t matter if you’re a small subcontracting business or a global operative. When you’ve got decisions to make, you need information fast.

The team of industry professionals at Hydro Blind Solutions believes you can make better, more informed decisions when you better understand what your project needs. We’re here to share what we know. Call (409) 736-7665 or contact us to learn more.

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