SA 333 Grade 6 Pipe and SA 350 LF 2 Cl.1 Material

[waliq]

Hi all,

I have been looking into the materials for nozzle pipe and flange for a vessel intended for a low temperature applications of -40 Deg C

I found out that SA 333 Grade 6 can be used to min. temperature to a minimum temperature of -45 Deg C while SA 350 LF Cl. 1 can be used to a min. temperature of -46 Deg C

My understanding is that both of these materials come as impact tested (by supplier) and there is no need for further impact testing them for an application of -40 Deg C.

Further, if I use these materials, do I need to check in the box in nozzle dialog of PV elite that these materials are impact tested?? Since, if I do not check this box and use these materials, the report shows a min of -29 Deg C for Sa 333 grade 6 material. But, the min temperature it can go is -45 deg C.

Please tell me if I am doing anything wrong and failing to understand properly

 

[XL83NL]

Further, if I use these materials, do I need to check in the box in nozzle dialog of PV elite that these materials are impact tested??

- Read PVE's FAQ
- Perform 2 calcs, one iwwith the check box and one without
- Compare results
- Take the BPV COde at hand, en find out what the code has to say about it.
- Compare Code requirements with PVE's result and take your conclusion

 

[waliq]

@XL83NL
The BPV code's requirements are pretty clear regarding the impact test exemption.

My primary question is about these materials purchasing. Do they come impact tested to these temperatures?? or is it their mechanical properties, that permit these materials to be used at these temperatures?

 

[DVWE]

waliq,

Have a read of each spec. If something is not clear to you, then ask for clarification.

The devil is in the details; she also wears prada.

 

[XL83NL]

waliq, thats a different question.

My primary question is about these materials purchasing. Do they come impact tested to these temperatures?? or is it their mechanical properties, that permit these materials to be used at these temperatures?

Do as DVWE said, and read the specs. Assuming you work to VIII-1, you have a copy of IIA and IIB. Review IIA for the applicable section of SA333, and come back when something isnt clear.