A flange is an important part of any pipeline system and needs to be high-quality.

Why Flanges are used?

A flange is used most commonly on piping applications to allow or restrict the flow of fluids.

Flanges are typically installed on pipes by welding, but there are options for threaded and lap joint flanges that do not require welding.

Flange connections are made by drilling bolt holes at equally-spaced intervals that will align to a matching flange face.

The two flange faces are then positioned together and held together with a series of bolts and nuts.

Flanges are most commonly manufactured based on industry specifications established by ANSI B16.5, ASME B16.47, MSS-SP44, API, and AWWA-C207.

What are the types of Flanges?

There are many types of flanges and thanks to our vast inventory, we are able to offer a wide range of high performance flanges and custom flanges for all industries and specialty projects in a wide variety of configurations that meet ASTM and ASME specifications:

Sizes ranging from 1/2” to 48”  and thickness ranging from 1/4″ to 1-5/8”

Pressure class ratings from 150 to 2500 Pounds

What are the different Industrial Flanges materials?

Thanks to our vast inventory, we offer flanges in all material grades.

Carbon steel is one of the most common materials used for piping, due to its overall strength, ease to manufacture, and low-cost relative to other materials. According to the American Iron and Steel Institute (AISI), steel is classified as Carbon Steel when it contains up to 2.1% carbon – which is the alloying material.

Carbon steel is typically classified into three main categories, based on the amount of carbon it contains:

  • Low (0.05% – 0.30%)
  • Medium (0.31% – 0.80%) – Stronger than low carbon steel, can be used for large parts (such as automotive components)
  • High (0.81% – 2.1%) – Stronger than medium carbon steel, can be used for smaller parts (such as springs)

Carbon steel flanges are a great choice for many applications that do not involve harsh chemicals or abrasive mixtures. This is because many applications such as water and oil processes will use carbon steel piping. Using the proper carbon steel flanges will help ensure material compatibility, reduce the risk of corrosion, and extend the life of equipment, and reduce the total life cycle cost of your fluid processes.

Our carbon steel flanges are manufactured from high-grade material that meets or exceeds ASTM, ASME, and ANSI specifications.

Stainless steel is common name for a family of alloy steels which typically contain 10% to 30% Chromium (Cr). Chromium is a hard metal that is used to increase corrosion resistance and strength of steel that has a lower Carbon content.

There are several different types and grades of stainless steel available throughout industry, but the most commonly used are 304, 304L, 316, and 316L. The “L” after the number grade designates a lower Carbon content. Lowering the Carbon content will slightly reduce the strength of the steel but will also minimize carbide precipitation during welding – which means the weld joint will degrade slower for 304L than 304.

304 stainless steel will contain approximately 8% to 10% Chromium, while 316 stainless will contain 10% to 14%, and will also contain molybdenum. 316 will be more corrosion resistant and stronger than 304 but can also be more expensive.

We have stainless steel flanges available in 304, 304L, 316, 316L, 321, 347, Alloy 20, and several other materials that meet or exceed ASME and ASTM standards to ensure you have the highest quality material to handle your products.

Low-Temperature Carbon Steel flanges (LTCS) like A333, A350 and A420 was developed for low temperature applications, such as cryogenics. LTCS will have the same carbon content as Low and Medium Carbon Steel (0.05% to 0.30%) but will typically be impact tested at -50° F and may be Nickel plated, which allows for use in low-temperature applications.

Using Low-Temperature Carbon Steel flanges will help ensure uniform material compatibility for your piping and other process equipment connections and make sure that you are getting the best connections for your low-temperature fluid processes.

Our Low-Temperature Carbon Steel weld-fitting flanges are available in material that meets or exceeds ASTM A420 standards and is available in A350 LF1 and LF2 for custom flange options.

Largest Flanges Supplier

South Coast Supply Co. is one of the largest flanges supplier for every application. Make sure you give us a call at 713-688-7721 and experience the difference of working with an experienced supplier that cares for his customers.

With our experienced technical sales staff to support you, we can guarantee that we can provide you with the best solution for your application. This is supported by our advanced stock tracking system, and our rapid delivery team, to ensure that you are provided with the best experience from beginning to end.