What is the difference between A106 and A672?

ASTM A106:

Application:

ASTM A106 covers seamless carbon steel pipes intended for high-temperature service. It is commonly used in industries such as oil and gas, petrochemicals, power generation, and refineries for conveying fluids at elevated temperatures.

Manufacturing Process:

A106 pipes are typically produced using the seamless manufacturing process, ensuring uniformity in wall thickness and strength along the entire length of the pipe.

Grades:

A106 has different grades like Grade A, Grade B, and Grade C, with varying tensile and yield strengths to suit specific application requirements.

Dimensions:

A106 pipes have specified dimensional requirements, including size, wall thickness, and length, to meet industry standards and ensure compatibility with various fittings and components.

ASTM A672:

Application:

ASTM A672 pertains to electric-fusion-welded steel pipe for high-pressure service at moderate temperatures. These pipes are often used for conveying fluids under higher pressure conditions compared to A106 pipes.

Manufacturing Process:

A672 pipes are manufactured through electric fusion welding, which involves joining steel plates together to form the pipe. This process allows for the production of larger diameter pipes suitable for high-pressure applications.

Classes:

A672 is categorized into different classes based on minimum yield strength, ranging from Class 10 to Class 50, indicating the strength levels of the pipes.

Material:

A672 pipes are made from carbon-manganese steel, providing good mechanical properties and weldability suitable for high-pressure applications.

Major Differences:

Manufacturing Process:

A106 utilizes the seamless manufacturing process, while A672 is produced through electric fusion welding.

Intended Use:

A106 is primarily used for high-temperature applications, while A672 is designed for high-pressure services at moderate temperatures.

Material Composition:

A106 pipes are typically made of carbon steel, whereas A672 pipes are constructed from carbon-manganese steel.

Strength Classification:

A106 offers different grades (A, B, C) with varying strength levels, while A672 is classified into different strength classes (10, 20, 30, 40, 50).

Manufacturing Technique:

A106 pipes are seamless, ensuring uniform properties, while A672 pipes are welded through electric fusion, allowing for the production of larger diameter pipes.

Understanding the distinctions between ASTM A106 and ASTM A672 is crucial for selecting the most suitable pipe material based on specific application requirements, such as temperature, pressure, and structural integrity considerations. Each standard serves distinct purposes within the realm of steel piping, catering to diverse industrial needs where either high-temperature or high-pressure capabilities are paramount.