Charpy Test

[gayaz]

I designed a shell of 127 ID and 60 in length in advance pressure vessel software. the software says that the result is questionable and says charpy test is required?. Can any one explain why charpy test is required? I am doing Full RT, 100% weld efficiency.
thanks

 

[Tankman650]

What is the material, thickness and minimum design metal temperature???

These may fall in the impact requirement range.

 

[gayaz]

Yea if the material is normalized i does not require impact test. or i can take exception from impact test using UG-20 (f). i found it know thanks but please post any information that u may want to share here thank you

 

[welding1]

Useful guidance, including a calculator for UCS66 can be found at

http://www.gowelding.btinternet.co.uk/new/fracture/impact.html

Regards
John

 

gayaz,

Search your ASME Codes for UCS-79 and Part D regarding
allowable extreme fiber elongation. This usually triggers
the APV software to include a warning in the shell or
head design report.

 

[Anthracite]

Gayaz,

There is an excellent article regarding the impact testing requirements of Part UCS at the following link:

http://www.albertaboilers.com/technicl.htm

The article is called "The Impact Testing Enigma"

Good reading.