Cost-effective Piping Solutions
Carbon steel flange and end flange connectors are basically made of carbon steel. common standards include astm a694, astm a105n (sa105n), mss sp-44, din 2533. accompanying pressure ratings are from class 150 to 2500.
Carbon steel flange, that is, the flange plate or the end flange connection piece whose body is made of carbon steel. The flanges containing carbon steel are called carbon steel flanges. Common materials are cast carbon steel grades WCB, forgings A105, or Q235B, A3, 10#, #20 steel, 16 manganese, 45 steel, Q345B, etc.
Usually in order to prevent rusty flange surface with electroplating layer (yellow zinc, white zinc, etc.), or brush anti-rust oil and spray anti-rust paint treatment.
Carbon Steel Flanges are engineered from durable carbon steel, offering a cost-effective option for industrial piping. Compliant with ASME B16.5, they suit moderate-pressure systems. As of August 22, 2025, 01:36 AM PDT, they remain a popular choice.
These Cost-Effective Flanges are available in sizes from 1/2” to 48”, with pressure ratings up to 2500 PSI and temperature tolerance up to 400°C. Their robust construction makes them ideal for general industrial use.
Carbon Steel Flanges undergo tensile, hardness, and hydrostatic testing for quality assurance. Coatings like galvanizing or FBE enhance corrosion resistance, making them suitable for oil and gas and water treatment as of August 2025.
Compared to stainless steel, Carbon Steel Flanges are more affordable but require protective coatings for corrosive environments, with a service life of 15–30 years with proper maintenance.
Carbon Steel Flanges address challenges like cost and moderate-pressure needs in industrial piping, providing a reliable solution as of August 22, 2025.
Modern carbon is a common steel with carbon content up to 2.1% by weight and primarily alloyed with iron. The term “carbon steel” may also be used to call out steel which does not have a large amount of chromium or nickel. The carbon content can vary for A105 with a maximum allowable of 0.35 as a percentage composition. As the carbon content increases, the steel hardens and increases in strength through heat treatment processes. Many common treatment techniques in the industry are quenching, tempering, and normalizing. As carbon steel is treated, it become less ductile and brittle. This makes it slightly more difficult to shape and weld, however the trade off in field service is often considered worth the extra effort to form the necessary weld seals.
For trace elements, no alloy element (minimum content) is required, specifically in reference to molybdenum, nickel, chromium, titanium, and vanadium.
| Criteria | Forged Steel Flanges | Cast Iron Flanges |
|---|---|---|
| Manufacturing Cost | More costly due to forging process | Less expensive and easier to produce |
| Shape & Profiles | Less irregularities, consistent uniformity | Can be molded into complex shapes |
| Applications | Ideal for high-pressure pipelines | Used in non-pressure pipelines |
| Precision | High strength, easy to cut & machine | Centrifugal cast flanges achieve higher precision than standard cast |
| Strength & Durability | Higher tensile strength, superior performance | Weaker under pressure, prone to brittleness |
| Corrosion Resistance | Lower carbon content, less rust-prone | Higher carbon content, more rust susceptibility |
Overall, forged steel flanges are preferred for demanding, high-pressure applications, while cast iron flanges remain a cost-effective choice for non-critical, low-pressure uses.
Ensures secure, leak-proof connections in piping systems.
High durability reduces maintenance costs and downtime.
Adaptable to diverse applications, enhancing operational flexibility.
Resistant to wear and tear, offering long-term reliability.
Robust construction allows them to withstand high pressure and heavy loads without deformation.
Treated with coatings or galvanization to resist corrosion in moist and chemical-rich environments.
Available in weld neck, slip-on, blind, and threaded types to suit varied industrial needs.
More affordable than stainless steel, making it suitable for large-scale projects.
Simple design enables fast installation and easy maintenance with minimal disruptions.
ASTM A694 Carbon Steel Flanges
Carbon steel flanges are durable, cost-effective components used to connect pipes and equipment in industrial piping systems.
Compliant with standards like ASME B16.5 and ASTM A105, carbon steel flanges undergo rigorous testing for pressure resistance and material integrity to ensure reliable performance in demanding environments. Different grades, such as low, medium, or high carbon steel, offer tailored solutions for specific needs, providing versatility for high-pressure systems, pipelines, and industrial frameworks. Their robust design ensures long-term reliability and cost-efficiency.
So the Carbon Steel ASTM A694 F70 Flange can be seen in the petrochemical, oil and gas and in nuclear power industrial applications. The different types of the flanges are used for different connection types.
Carbon steel flanges provide strong, affordable, and reliable solutions for secure connections in industrial piping applications.
There are six most commonly used flanges, also knows as ANSI Flange, ASME B16.5 Flange. However, these designs can be modified to meet the specific functions and requirements of the applications. Therefore, it’s essential to understand the pressure at the flagged joint, the required strength, and the size of pipes involved. With the correct information comes six types of flanges that an individual can choose from. These include:
Special Flanges
Additionally, the flanges can be modified to form other types, depending on application and functions.
These unique designs are made to incorporate specific needs and applications, like reducing flanges to answer to size and orifice flanges to incorporate orifice mounting.
Incoloy 825 Flange
Industries Using
The basic application of the Carbon Steel Flanges to connect pumps, pipes, valves, and other equipment, often using butt welds, to make a pipework system.
Alloy steel flanges are mainly made up of chromium...
Stainless steel flanges offer corrosion resistance...