Re: [MW:25628] Hardness for vessel after PWHT

Hi!

You can control Hardness  for higher thickness weld by increasing the preheat temperature to through thk  and also some time by increasing Soaking time  of PWHT (As NACE application PWHT is mandatory)

Regards

Hegde

On Sunday, 30 October 2016 9:22 AM, Perumal Govindan <perumalgovindan@gmail.com> wrote:

Hi

Please provide your hardness report for review to clarify.

Regards
Govindan

On 29 Oct 2016 05:32, "Kumar" <sk7920541@gmail.com> wrote:

Dear experts,
In our project for pressure vessels, moc- SA 516 gr.70 N, shell thickness 55mm (nace MR 0175). After doing PWHT, hardness measured and most of readings found in limit.
According to procedure vessels having more than 50mm thick hardness value shall not exceed more than 225 (brinell for p no. 1). But some values are 228,230,18 etc.. could we get expert advise to adress this dis-parity pl.
Thanks in advance,
Kumar.

--
http://www.linkedin.com/ groups/MaterialsWelding- 122787?home=&gid=122787&trk= anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@ googlegroups.com.
To post to this group, send email to materials-welding@ googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/ msgid/materials-welding/ CALuBtp_S7ubrboSF% 2BeMt6pDHCZasQOmpY4Lo7E_Y- VZzmfBumQ%40mail.gmail.com.
For more options, visit https://groups.google.com/d/ optout.

--
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CANiuf9cf-kG_wLa5cwRSNMC_p4Ti6%3DK2S4wje_Psggr3iwHQpQ%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.