Studded Pipe for Africa Project

March 31, 2017 in Blog, Jobs/Projects, Pipe by

Here are a few pictures of some studded pipe that we did for a project in Africa!



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36″ STD X42 PSL1 Pipe

February 10, 2016 in Blog, Jobs/Projects, Pipe by

Here are some pictures of some 36″ STD X42 PSL1 welded pipe that we cut to length for a customer.



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6″ STD 304H SMLS Pipe

July 22, 2015 in Blog, Jobs/Projects, Pipe by

We just shipped a small cut piece of 6″ STD 304H SMLS Pipe to Singapore for a shutdown.

RIMG1018 RIMG1019 RIMG1020 RIMG1021 RIMG1022 RIMG1023

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Material for Sale – 20″ x .860″

July 16, 2015 in Blog, Pipe, Specials by

We are trying to move some of our stock.

10.9 ft CTL – 20″ OD x .860″ wall X65 PSL2

Made by Welspun

Ex Works: Houston

Email Tim (timw@stlpipesupply.com) for pricing.

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Seamless Pipes: An Overview

February 04, 2015 in Pipe by

Seamless pipeSeamless pipes are one of the main classifications of pipes. Let’s take a brief look at how they’re manufactured, as well as some of the potential benefits they present.


What makes a seamless pipe a seamless pipe is how it’s manufactured.

In contrast to welded pipes, which are made by rolling a flat plate into the shape of a pipe and then welding the seam, seamless pipes are made by drawing a solid billet over a piercing rod. This forms a hollow inner shell and creates pipes without seams.

Ability To Withstand Pressure

It’s this lack of a seam that give seamless less pipes their greatest advantage: an improved ability to withstand pressure. 

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Our Industrial Pipe Materials, Grades and Customizations

January 21, 2015 in Pipe by

Industrial pipeAt St. Louis Pipe and Supply, we make sure all our customers have the right piping materials, grades and customizations to fit their project. Here’s a brief look at each of those areas.


We pride ourselves on being able to supply you with almost any material you need to complete you project on time and on budget. Our varied commercial pipe inventory includes galvanized, carbon, alloy and chrome, just to name a few.

As well as offering an array of materials, we also supply both seamless and welded industrial pipe, line pipe and FBE.


Need a specific grade of commercial pipe for your project? We can help. We strive to have the exact grade to fit your needs.

Here’s a sample of the grades we offer:

Chrome: p1 / p5 / p9 / p11 / p22 / p91

Stainless: 304h / 304l / 316h / 316l / 317l / 321h / 347h / 310 / 309 / duplex 2205 / super duplex 2507

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Nickel Alloys for Corrosion Resistance

January 07, 2015 in Pipe by

Alloy pipeIf you need pipes that can withstand acidic corrosion, nickel alloys may be a good choice.

Nickel alloys like alloy 625, alloy 825 and alloy 400 fall between stainless steel and the exotic materials, such as tantalum, in terms of resistance to corrosion. They’re often used in environments where aggressive inorganic acids are present, where stainless steels would be susceptible to stress-corrosion pitting, cracking and crevice attack.

Corrosion-resistant Attributes

Nickel alloys have a variety of corrosion-resistant attributes, including:

  • Most are very resistant to chloride-induced stress corrosion cracking
  • Many can resist aggressive reducing acids, including hydrochloric and low-to-medium concentrations of sulfuric acid
  • A number of nickel alloys can endure both strong reducing acids and strong oxidizing acids
  • Many have high resistance to alkalis
  • Some have high resistance to localized attack (pitting and crevice corrosion)

Types of Nickel Alloys

There are six main types of nickel alloy, each with its own recommended use case: 

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Carbon Pipes: Advantages and Applications

November 26, 2014 in Pipe by

Carbon pipeCarbon steel pipe is one of the most popular piping materials in the world. And for good reason: it has many advantageous characteristics.

Let’s take a look at some of those characteristics and the applications that they make carbon pipe particularly well suited for.

Shock Resistance

Carbon pipes have a tremendous ability to withstand shocks and vibrations. While other materials may succumb in such environments, carbon pipes are able to maintain their integrity and performance in even the most jarring conditions.

This makes carbon pipes and welded carbon pipes particularly useful in the transportation industry. Pipes laid under roadways can experience extreme shocks and vibrations from the heavy traffic above. Carbon pipe, with its ability to withstand shock, is a great choice for such situations.

Tensile Strength

Carbon steel can endure very high pressures. This gives carbon pipes an excellent carrying capacity, meaning that, pound for pound, they can carry more than most pipes comprised of other materials.

Its high tensile strength not only makes carbon pipes a great solution for high-pressure applications, but also for projects where your budget may be tighter than usual. Their high carrying capacity means that thinner carbon pipes can be used to get the same job done that only thicker pipes of other materials could handle. This, in turn, means your material costs can be lower.

Safe and Easy to Work With

Many piping materials must be treated with preservatives, glues or pesticides, which means they must be handled with caution. However, carbon pipes and welded carbon pipes don’t need these treatments.

Not only does this make them safer to work with, it makes them better suited for use in home projects–you certainly don’t want to introduce dangerous chemicals into your house. Furthermore, carbon pipe can also withstand disasters like tornados and hurricanes better than some other pipes, which also makes them a good choice for home projects.

 As you can see, carbon pipe has a number of advantages that make it well-suited for a variety of projects. Contact us today so we can discuss how it might work well for your next project.

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Nickel Alloy Pipes: Benefits, Manufacturing & More

October 09, 2014 in Pipe by

Alloy pipeNickel alloy pipes are a popular choice for many different projects. Let’s take a brief look at their benefits, manufacturing process, grades and applications.


Using nickel alloy pipe brings three primary advantages:

Resistance to Heat

Some nickel pipe alloys can endure very high temperatures, making them advantageous in machinery or other environments where intense heat is present.

Resistance to corrosion

Oxidation reactions cause corrosion. Nickel alloys have a slower rate of oxidation than most metals, meaning they can resist corrosion for longer.

Low Rate Of Expansion

Many nickel alloys pipes have either a low rate of thermal expansion or a rate of thermal expansion that can be predicted very accurately. This makes them desirable in high-temperature environments where you need a uniform shape.


Nickel alloy pipes are made with a complex manufacturing process that begins with the purest materials. Contaminated materials would lead to pipes without the beneficial properties mentioned above. The stages of the manufacturing process include:

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An Introduction To Pipe Sizing

September 24, 2014 in Pipe by

For newcomers to the piping industry, pipe sizing can be confusing.

There are various reasons for this, with history probably being the most significant. We still use many aspects of a system that was in place long ago. Since then, technology has evolved and the industry has changed, so what made perfect sense back then might seem a bit awkward today.

However, with a little work, piping sizing isn’t too difficult to understand. Here’s a brief introduction.


The North American system for designating the outside diameter (OD) of a pipe is nominal pipe size, or NPS. Its European equivalent is Nominal Diameter, or DN. The primary advantage of classifying pipes in this way, by their outside diameter, is that it allows pipes of the same size to be fit together even if they have differing wall thicknesses.

The tricky part is this: the NPS value of a pipe doesn’t always equal its OD. Intuitively, you would think that a pipe with a NPS value of ⅛ would have a OD of ⅛ inches. However, it actually has a diameter of .405 inches. The same is true for all NPS values from ⅛ -12; they don’t match up with their OD.

This is because the NPS for these values was originally designed to refer to the inside diameter of a pipe based on wall thicknesses that were standard at the time.

However, for NPS of 14 and above, the NPS value does match up to OD.

Standard Pipe Schedule

In addition to NPS, the other factor to consider when analyzing pipe sizes is pipe schedule. 

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