ASTM A105 is the most widely used carbon steel grade. This is used to manufacture forge piping components. Some of them include flange and forge fittings. They are designed for pipes with smaller diameters. This carbon steel material grade, ASTM A105, is ideal for pressure systems that require high-temperature service.

Carbon Steel ASTM A105 manufactures a variety of components, including flanges, forged fittings, and valve bodies. Additionally, some of the various types of ASTM A105 flanges are as follows:

Types of ASTM A105 Flanges

ASTM A105 WeldNeck Flanges:

In the piping process, WeldNeck flanges are the most commonly used. Butt welding helps to provide the highest level of joining integrity. This flange is used in applications that involve high temperatures and pressures. However, it is bulkier and more expensive than the others.

ASTM A105 Blind Flanges:

This looks like a blank disc with a bolt hole. These work in conjunction with other flanges to isolate the piping process. They also function when you want to stop piping. Additionally, these serve as manhole covers for the vessel in use.

ASTM A105 Slip-on Flanges:

They have a hole that is the same size as the pipe’s outside diameter through which the pipe can pass. You can attach it to the pipe and weld it in and out. This is an appropriate option for applications involving temperature variation and low pressure.

ASTM A105 Lap Joint Flanges:

This comes in two parts: the stub end and the loose backing flange. The buttwelding of the stub end occurs. But the other part moves freely. Both of these components do not have to be made of the same material. Carbon steel can save you a significant amount of money when manufacturing these components.

ASTM A105 Orifice Flanges:

They use orifice metres. They assist in measuring the rate at which liquids and gases flow through the pipeline. These flanges typically form separate orifice carriers or tappings in the pipe. Their facings are either raised or ring-type joints.

ASTM A105 Spectacle Blind Flanges:

This flange is similar to a steel plate that changes shape and thickness. One of them is a solid plate, while the other resembles a large steel ring. The steel section between these discs connects them.


CS ASTM A105 Flanges play a crucial role in connecting pipes to equipment and valves. They contribute to increased flexibility in establishing an appropriate maintenance schedule. You can select the one that best fits your flange.