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EN13445 Impact Testing

EN13445 Impact Testing

EN13445 Impact Testing

(OP)
Has anybody seen the new european design code for unfired pressure vessels yet?

In section 7 of the essential safety requirements of the PED (97/23/EC) stated that materials should demonstrate an impact test value of 27J in an ISO-V test.

Then they had the sense to clarify this in a guideline so that impact tests were only required if brittle fracture was an issue.

Now the design code has asked for austenitic stainless steels to be impact tested to show 40J using Charpy. Austenitic stainless steels are exempt from impact testing in every other code because thay do not show the same ductile-brittle transition that martensitic, ferritic and duplex materials do.

Can anybody make any sense out of this?

The stainless forging spec (which is identifed as prEN in the design code but has been a BS EN since 2000) states clearly that austenitic steels only need to be impact tested if the purchaser requests it.

Help (I'm not going mad am I)

Fawkes

RE: EN13445 Impact Testing

At this time, I don't find yet people telling that they are happy with those standards. They are very conservatives and they limit the field of the application of some common practices.
Note that the application of this series is not mandatory.
In the directive they speak also about impact test (min 27 J at lowest temperature) but there are some ways to escape to this by applying other articles! Actually, we put in the market cast iron product marked CE.
If this series will be obligatory it would be an intentional catastrophe for wide sectors of industry.  

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