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EN13445 Unlisted Materials

EN13445 Unlisted Materials

EN13445 Unlisted Materials

(OP)
Under EN13445 are materials not listed in Part 2 Annex 2 A able to be used at elevated temperatures (say 290C)?  If so, what must be done to make them suitable?  I am looking at a piece of equipment containing EN10216.1 P235 TR2, EN10025 S275 JR and EN10255 S195T.  Are these compliant and if so what is the process to make them acceptable?

Regards

CSGWB.  

RE: EN13445 Unlisted Materials

Hi,
I was wondering similarly, in what temperatures can I use EN 10216-1 P235GTR1 pipes and why? Where is it specified?  

RE: EN13445 Unlisted Materials

P235TR2 according EN 10216-1 is listed in EN 13445-2. But this standard is explicitly defined for room temperature service.  Therefore you will not find minimum values at 290°C.  P235GH according EN 10216-2 is the adequate steel grade for service at 290°C.
S275JR according EN 10025 is a structural steel and therefore not a harmonized standard under the pressure equipment directive and not listed in EN 13445-2.  If used, a particular material appraisal is necessary.  P275NH according EN 10028-2 is the adequate steel grade for service at 290°C.
S195T according EN 10255 is also a structural steel.  Same comment as for S275JR
P235GTR1: I do not find this designation in EN 10216-1.  P235TR1 is not listed neither in EN 13445 (pressure vessels) nor in EN 13480 (piping) as this grade does not fulfill the essential safety requirments of PED, see
 http://www.tenaris.com/archivos/documents/2003/592.pdf    

RE: EN13445 Unlisted Materials

(OP)
ulyssess,

Thank you for your response.  What is typically required for a particular material appraisal? I assume some high temperature tensiles would need to be produced.  At 290C, I cannot see any issues with the micorstructure.  If we were going to above 350C, then I could accept there may be some degredation.  

CSGWB

RE: EN13445 Unlisted Materials

Conc. particular material appraisal see
http://ec.europa.eu/enterprise/sectors/pressure-and-gas/files/pe-03-28-guiding-principles-for-the-content-of-pma_en.pdf.
In my opinion your material choice will not fulfill the essential safety requirements of PED.  According Guideline 7/24 http://ec.europa.eu/enterprise/sectors/pressure-and-gas/files/interpretation_materials_all_en.pdf you need a material specification with specified minimum values at elevated temperatures confirmed by the material manufacturer.  None of your materials will fulfill this requirement.  A simple retesting by your own is not sufficient.  
Other possible problems
- impact testing
- test frequency.  E.g. S275JR as structural steel is tested only per lot.  According PE-03-28 you need a testing as per corresponding EN 10028, e.g. per plate.  
I suggest to use pressure vessel materials designed for elevated temperatures.

RE: EN13445 Unlisted Materials

(OP)
Thank You Ulyssess.

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