Pipe - Carbon, Stainless, Special Alloy

Technical Information View All Pipe

Pipe Inventory

The following items are considered shelf items, and MSI can generally ship any of the sizes below within hours of their order.  Of course, large quantities or odd schedules (wall thicknesses) may affect product availability.  MSI Supply can also provide diameters outside those listed in the table below, but they may be subject to lead times.

Pipe—MSI Supply, Inc. Get A Quote

    Diameters Available
Material Construction Min Max
Carbon Seamless 1/8" 24"
Welded 1/2" 48"
Stainless Seamless 1/4" 24"
Welded 1/4" 36"
Alloy 20 Seamless 1/2" 8"
Welded 6" 12"
Hastelloy C276 Seamless 1/2" 8"
Welded 1/2" 12"
Duplex 2205 Seamless 1/2" 8"
Welded 4" 24"
Duplex 2507 Seamless 1/2" 8"
Welded 6" 12"
Monel 400 Seamless 1/2" 8"
Welded 8" 12"
Inconel 600 Seamless 1/2" 8"
Welded 8" 12"
Inconel 625 Seamless 1/2" 8"
Incoloy 800 Seamless 1/2" 8"
Incoloy 825 Seamless 1/2" 8"
Welded 8" 12"

Material and Construction

The following offers an in-depth view of the material grades sold by MSI Supply. Each link below will provide the chemical composition, manufacturing specifications, yield and tensile strength, as well as other particular product and grade information.

Carbon Steel Pipe

  • ASTM A53 – Seamless and Welded Standard Pipe: ASTM A53 is a specification for carbon steel alloy pipe, which is suitable for welding, bending, and flanging. The ASTM A53 specification covers seamless, welded, black, and hot-dipped galvanized pipe. It is used in a wide range of applications, including but not limited to refineries, compressor stations, natural gas transmission, steam conduction, and generator plants.
  • ASTM A106 - Seamless High-Temperature Pipe: ASTM A106 is a specification for carbon steel alloy pipe intended for high temperature and high-pressure applications and is suitable for flanging and bending. It is used in industrial applications including, but not limited to process piping, boiling plants, compression stations, refineries, and steam lines.
  • API 5L GrB - High Yield Pipe: The American Petroleum Institute (API) specification API 5L covers seamless and welded steel line pipe. Applications for API 5L include, but are not limited to petroleum, petrochemical, natural gas industries, and waterworks.
  • A333 - Low Temp Pipe: ASTM A333 pipe covers seamless and welded carbon steel pipe that is intended for cold temperature service tolerating temperatures as low as -150°F.

Stainless Steel Pipe

Special Alloy Steel Pipe

Special alloys are used for applications that require more demanding performance, such as extreme temperature and corrosive resistance.  Each of the following exotic alloys provides unique attributes for such engineered applications.  Applications for these alloys include, but are not limited to: chemical processing, chemical storage, pollution control, waste treatment, food processing, and pharmaceutical equipment.

Alloy Steel Pipe

  • A335 - Chrome Moly Pipe: A335 is referred to as Chrome Moly Pipe.  Its applications include, but are not limited to, the power generation and petrochemical industry. A335 pipe is a cost-effective path for achieving tensile strength, corrosion resistance, and high-temperature strength. 
  • 4130 Pipe: 4130 is actually a tubing specification, but Seamless Pipe is often made to the pipe schedule for many oil and gas applications.  Applications typically involve above-ground applications.

Seamless vs Welded

As seen in the specifications above, pipe is commonly manufactured in both seamless and welded constructions.

Advantages of Welded

Welded pipe generally has a more consistent wall thickness than welded pipe, and the internal surface of welded pipe can be checked prior to welding and finishing the joint, which is not possible during the manufacturing process for seamless pipe.

Advantages Of Seamless

The main advantage of seamless pipes is that they don’t have a weld seam and are therefore unsusceptible to the possibility of a weak seam. However, while the seam of a welded pipe has been viewed for years as a weak spot that is susceptible to corrosion and even failure, the manufacturing process improvements in recent years have provided for better strength and performance of weld seams that is almost indistinguishable from the rest of the pipe. In addition to the absence of a weld seam, seamless pipe generally has better overall roundness than welded pipe.


TGF3 (Doped & Wrapped)

Coal Tar is used to protect pipes exterior surfaces from the environmental elements (just like FBE).  While TGF3 used to be extremely popular, it has been utilized less since the implementation of FBE, because it is messier and less aesthetically pleasing than FBE.


    1. Blast the joint to clean the substrate.  t spins through the application booth. 
    2. A primer is applied.
    3. The ID is then sprayed with air in order to remove any debris.
    4. The hot tar is continuously poured over the pipe
    5. There are several layers applied as the tar is poured.  It is layered in the order of tar, fiberglass, tar, fiberglass, tar, and crate paper.  
    6. After the layers have been applied, the joint is immediately sprayed with water to cool it and then has its ends ground clean for the cutback.

FBE (Fusion Bond Epoxy):

FBE is a thermoset epoxy that is used to protect the OD of the pipe from deterioration over time. Properly coated FBE can extend the life of a pipe by 20 years.


    1. Clean the Pipe Surface
    2. The surface is heated to the required temperature for the FBE coating
    3. The coating is applied and cured


The link below leads to a pipe chart, as well as a guide to its interpretation.  The pipe chart is a guide to the standard diameter and wall thickness dimensions for pipe.  These schedule and outside diameter (OD) values are used across all materials and grades of pipe sold by MSI Supply.