The flange products whose material is ASTM A105N, we call them ASTM A105N steel flanges. ASTM A105N steel has no grade in the ASTM A105 standard; N means the heat treatment normalization of the steel.
ASTM A105 Flange is a forged carbon steel flange used in piping systems for high temperature services and ambient temperature services in different pressure conditions. The material grade includes other fittings that go with these flanges. The flanges range in size, shape, and type.
ASTM A105 is the most common forged carbon steel material for flanges, but it is not suitable for low-temperature service. ASTM A105N steel is widely used as the flange material in low-temperature service and other critical applications.
ASTM A105 VS. ASTM A105N flange
ASTM A105 steel flanges and ASTM A105N steel flanges have the same raw materials, the same steel grades, but the heat treatment requirements are different. N means Normalization heat treatment, and A105 flanges have no heat treatment requirement.
That means the A105N flange is one kind of A105 flange. But the A105N flange has better mechanical properties than the regular A105 flange, better strength, and better performance in low-temperature service.
A105: A standard forged carbon steel material without the specific normalization treatment for A105N.
A105N: The same material as A105 but specifically normalized, making it a better choice for critical applications and low-temperature service.
So, the ASTM A105 flange and ASTM A105N flange have the same chemical composition, but the A105N has better mechanical properties and is usually used in critical situations.
For more details about the A105 and A105N, please click here.
Carbon Steel A105/A105N Flanges Types:
There are several types of Carbon Steel A105 Flanges, each designed for specific applications. Here are the most common types:
- Weld Neck Flanges: These flanges are designed for high-pressure applications and are attached to the pipe by welding. Their tapered hub provides reinforcement and prevents distortion under heavy loads.
- Slip-On Flanges: Slip-On Flanges are easy to install and work well for low-pressure applications. They slide over the pipe and then require welding in place.
- Blind Flanges: Blind Flanges close the end of a pipe or valve. These flange requirements arise during maintenance. Additionally, they also work as manhole covers for the vessel in use.
- Socket Weld Flanges: These flanges have a socket that fits over the pipe and require welding to keep it in place. The flange design allows them to withstand high-pressure industrial applications. They are well-suited only for smaller-diameter pipes.
- Threaded Flanges: Threaded Flanges have threads on the inner surface, allowing them to screw onto the pipe. Do you know that there are two types of threads in this flange? One is male and female threads. These threads are responsible for the pipe connection strength.
Applications of Carbon Steel A105/A105N Flanges
Carbon Steel A105/A105N Flanges have applications in various industries due to their versatility and strength.
Some common applications include
- Oil and Gas Industry: A105 Flanges are useful in pipelines, refineries, and offshore drilling platforms for their strength and corrosion resistance.
- Petrochemical Industry: Flanges are helpful where resistance to corrosive substances is essential, especially in producing chemicals and the petrochemical industry.
- Power Generation: Carbon Steel A105 Flanges are the right fit for power plants, including nuclear and fossil fuel facilities, where high-temperature and high-pressure conditions are prevalent.
- Construction: These flanges are suitable for construction projects for their strength and durability.
Selecting the Right Carbon Steel A105/A105N Flange
- Pressure Rating: Determine the maximum pressure your system will experience and select a flange with an appropriate pressure rating.
- Flange Type: Choose the type of flange that suits your application, such as weld neck, slip-on, blind, socket weld, or threaded flanges.
- Size: Select the flange size that matches the pipe size in your system.
- Corrosion Resistance: Assess the environmental conditions where the flange will operate and consider coatings or linings to enhance corrosion resistance if necessary.
- Temperature: Consider the temperature range of your application and ensure the selected flange can withstand it.
- Standards and Specifications: Ensure the flange complies with relevant industry standards and specifications, such as ASTM A105.
As suppliers of forged carbon steel flanges, we produce international standard flanges for low, medium, and high-pressure gas, water, and oil applications—capable of withstanding up to 4 tons per square inch (psi). We also offer customized dimensions built to endure extreme temperatures and harsh chemicals without fail.
Please contact us to get more carbon steel flange products.
