Pipe Flange Basics

November 12, 2014 in Blog, Valves and Fittings by

FlangesPipe flanges are an important parts of piping systems. Some flanges are bolted together to form connections between pipes, while others–blind flanges–are used to cover or close the end of pipes.

One main advantage of using pipe flanges is that they make it easy to inspect, modify or clean pipes. Furthermore, using flanges means that you don’t have weld pipe spools, and they also make blasting, painting and NDO simpler and more convenient.

Pipe flanges, however, do have a few disadvantages. Their primary drawback is that they may be slightly more prone to leaking than other methods of connecting pipes. They also usually take up more space than their alternatives.

Types of Flanges

There are many types of flanges. Some of the most popular are:

  • Socketweld flange
  • Weld neck flange
  • Threaded flange
  • Slip on flange
  • Blind flange
  • Lap joint flange

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An Introduction To Flanges

April 16, 2014 in Blog, Valves and Fittings by

FlangesFlanges are an integral part of piping systems. Let’s take a look at what they do, what they’re made of, and some of their advantages and disadvantages.

What is a flange?

A flange is one method of connecting pipes, valves, pumps and other equipment in piping systems. They’re usually welded or screwed, and flanged joints are built by bolting two flanges together with a gasket between them to create a seal.

What are they made of?

Flanges are made of many different materials. There are cast iron flanges, aluminum flanges, brass flanges, high pressure steel flanges, etc. However, the most popular material for flanges is forged carbon steel. The material that the flange is made of is often selected to match the material of the pipe it will used with.

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Our Inventory: Beyond Industrial Pipe Supply

December 04, 2013 in Pipes Valves and Fittings by

Pipe Valves and FittingsGiven the name St. Louis Pipe & Supply, it’s obvious that we sell industrial pipes.

But did you know that our inventory includes much more than just pipes? Read on to discover our full range of services, from industrial pipe supply to you beyond.


Okay, we’ll tackle the obvious one first, our pipes. We offer a range of industrial pipe sizes and a number of different options for customizing your pipes, like threading and coating. Here are a few of our different pipe offerings:

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Our Ongoing Nigerian Project

January 10, 2013 in Blog, Jobs/Projects, Pipes Valves and Fittings by

We have been supplying valves and fittings for an ongoing project in Nigeria for three years..here are pictures of some of the latest materials arriving in our warehouse.

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Recent Order Shipped Overseas

January 07, 2013 in Jobs/Projects by

Recently, we had a large flange order shipping overseas that required all items to be braced, crated, desiccants added and waterproof material on the walls and lids.

See the pictures below of the process.

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304 Pipe, Fittings and Flanges for a Houston Client

December 18, 2012 in Blog, Jobs/Projects by

A recent order of 304 pipes, fittings and flanges went out to a customer in Houston. See the pictures in the gallery below.

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Recent Order of Flanges

January 17, 2012 in Blog, Jobs/Projects, Manufacturing, Pipes Valves and Fittings by

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Types of Stainless Steel Flanges Explained

November 02, 2011 in Blog, Manufacturing, News & Articles, Pipes Valves and Fittings, Valves and Fittings by

High pressure steel flanges are essential to include in your next piping project. Stainless steel flanges are highly resistant to corrosion and contain enough strength for your industrial piping plan. For high temperature and pressure treatment, consider purchasing high pressure steel flanges that comply with ASTM, ASME, ANSI and/or API standards.

API vs. ASME/ANSI standards:

Flanges meeting API standards can withstand high pressures and temperatures. The main difference between flanges that meet API standards and those that meet ASME or ANSI standards is the material used that can handle a high-pressure environment. Typically they are more efficiently used in dealings with gas and oils. When working with water, air, and steam in an industrial setting, ASME/ANSI flanges are more common.

Types of stainless steel flanges:

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