Fitness for Service - Brittle Fracture (Level 1 Assessment)

[birken]

Is level 1 assessment as per API 579 for brittle fracture applicable to P1 Group 1 & 2 materials only?
Just need this clarification to move forward.

Thank you.

Birken

 

[birken]

Any thoughts over this one?

 

[metengr]

See below right out of API 579

Carbon and low alloy could be P-No. 1 through P-No. 5A
3.1.1 This Part provides guidelines for evaluating the resistance to brittle fracture of existing carbon and low alloy steel pressure vessels, piping, and storage tanks. Other materials that could be susceptible to brittle fracture, such as ferritic, martensitic and duplex stainless steels, are not addressed in this Standard.

 

[birken]

Thank you.
A mainstream FFS software created a doubt in my mind as it explicitly stated that Level-1 assessment is not applicable on materials other than P-No.1 G-No.1 & P-No.1 G-No.2.
Clear enough now, as Table 3.2 for Curves also mentions materials other than P-No.1 G-No.1 & P-No.1 G-No.2.