Form

This specification covers a corrosion and heat-resistant steel in the form of welded and drawn or seamless and drawn tubing.

Application

This tubing has been used typically for parts, such as fluid lines, subject to high pressures and requiring corrosion resistance, but usage is not limited to such applications. Tubing has good oxidation resistance up to 1100 °F (593 °C).

Classification

Tubing, covered by this specification, is classified by form of fabrication as follows:

Type 1 - Welded and drawn

Type 2 - Seamless and drawn

If no type is specified, Type 1 shall be supplied.

Tubing, covered by this specification, is classified by quality evaluation as follows:

Class 1 - 0.125 inch (3.18 mm) length Ultrasonic Calibration

Class 2 - 0.060 inch (1.52 mm) length Ultrasonic Calibration

Class 3 - Ultrasonic testing not required

If no class or Class 1 is specified, Class 1 or Class 2 may be supplied. If Class 3 is specified, any of the three classes may be supplied.