What is the difference between ASTM A213 and A269 stainless steel pipe?

The ASTM A213 standard is mainly used for seamless ferrite and austenitic alloy steel pipes for high-pressure equipment such as boilers, superheaters and heat exchangers. It is suitable for high-temperature working environments and requires steel pipes to have good heat resistance and mechanical properties.
The ASTM A269 standard is suitable for seamless and welded austenitic stainless steel pipes for general purposes. The requirements of this standard are lower than those of A213. It is mainly used in normal and low temperature environments and is suitable for various industrial and civil fields, such as shipbuilding, seawater treatment, pressure vessels, etc.

How to distinguish between ASTM A213 and A269 stainless steel pipes?
The main differences between ASTM A213 and A269 stainless steel pipes are as follows:
The A213 standard has high requirements for the mechanical properties and corrosion resistance of stainless steel pipes to meet specific high temperature and high pressure environments.
The A269 standard has high requirements for the cleanliness and precision of the inner and outer surfaces of the pipe, such as the precision of BA grade bright annealed pipe can reach ±0.05mm2.
A213 is mainly used to manufacture turbine blades and other components in high temperature working environments, while ASTM A269 is suitable for stainless steel pipes for general corrosion resistance and low or high temperature applications.
Specifically, the ASTM A213 standard is suitable for seamless and welded austenitic stainless steel pipes with larger diameters, which are usually used in industrial applications in high temperature working environments. The ASTM A269 standard is suitable for seamless and welded austenitic stainless steel pipes with smaller diameters, which are suitable for general corrosion resistance and low or high temperature applications, such as gas pipelines, medical and other fields.