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Carbon Steel Flanges: Complete Guide to Types, Pressure Classes & Applications

Bring drawings, product information and document requirements together to make your next supplier enquiry easier to review.
LEOCO Editorial Team
September 13, 2026
CS Flanges
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Flanges play a critical role in industrial piping systems. They provide a practical method for connecting pipes, valves, equipment and other piping components while allowing systems to be assembled, inspected, maintained and modified when required.

Selecting the correct flange is therefore not simply about choosing a size. The flange type, pressure class, dimensions, material and project specification all need to be considered.

At LEOCO Group, we provide a comprehensive range of Carbon Steel Flanges for industrial and project applications.

A Wide Range of Carbon Steel Flange Types

Different piping configurations require different flange designs. Our range includes commonly required flange types such as:

  • Slip-On Flanges
  • Blind Flanges
  • Threaded Flanges
  • Weld Neck Flanges
  • Lap Joint Flanges
  • Socket Weld Flanges

This variety allows customers to select the appropriate connection solution for their piping system.

Pressure Classes for Different Applications

Industrial piping systems can operate under very different pressure conditions. Choosing the appropriate pressure rating is therefore an essential part of flange selection.

LEOCO Group offers carbon steel flanges in commonly required pressure classes and pressure ratings, including:

  • Class 150
  • Class 300
  • PN10
  • PN16
  • PN25

The required pressure class should always be selected according to the applicable piping design, operating conditions and project specification.

More Than Just Flanges

For professional projects, product supply is only one part of the procurement process. Engineering and procurement teams may also require supporting documentation to verify that supplied products meet project requirements.

Depending on project requirements, documentation may include relevant technical documents, inspection documentation, material certificates and compliance information.

This is why the process should begin with accurate product selection and continue through proper project documentation.

Helping Simplify Your Procurement Process

A well-prepared flange enquiry should ideally include:

Flange Type + Size + Material + Pressure Class + Standard + Quantity + Project Requirements

Providing these details enables suppliers to identify the required product more efficiently and helps reduce misunderstandings during procurement.

At LEOCO Group, our goal is to make the sourcing process easier by offering a broad range of carbon steel flange options for industrial piping requirements.

Carbon Steel Flanges for Industrial Projects

Whether your project requires Slip-On, Blind, Threaded, Weld Neck, Lap Joint, Socket Weld or other flange types, having access to multiple configurations and pressure ratings gives your procurement team greater flexibility.

From product selection to project documentation, LEOCO Group supports customers looking for dependable carbon steel piping components for industrial applications.

ABOUT THE AUTHOR

LEOCO Editorial Team

Product perspectives and project-planning notes from LEOCO. Explore our articles for practical guidance on piping, fittings, valves and documentation.

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