Re: [MW:16948] what is the procedure of welding between P91 to P8

[siva subramanian]

Dear Sir,

              P91 material is in P15E grouping.

So, we take it as P15E + P8 welding the condition are as follows,

For service temperatue up to 400 deg celcius, Use E 309-xx

For service temperatue up to 400 deg celcius upto 480 deg celcius , Use E NiCrFe-3

For service temperatue up to 480 deg celcius to upto 980 deg celcius , Use E NiCrFe-2

In case of welding of any P.NO to P8,Preheat shall be done only for that P.NO

The above mentioned information may useful to u Sir.

Thanks & Regards,

A.Sivasubramanian.

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From: Joseph Martin <jdmar...@gmail.com>
To: material...@googlegroups.com
Sent: Tuesday, 5 March 2013 3:24 PM
Subject: [MW:16948] what is the procedure of welding between P91 to P8

Dear sir,

what is the procedure of welding between P91 to P8???

Thanks and Regards,
Martin
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[kannayeram gnanapandithan]

For all purpose use only nickel base Welding consumable( Not
ENiCrMo3),, Do not use SS welding filler wires/rods
Pandithan
Welding consultant

[HAREESH K V]

Please refer the recommended practice published by AWS D10 committee.

AWS D10.8-96, Recommended Practices for Welding of Chromium-Molybdenum Steel Piping and Tubing

On Sat, Mar 9, 2013 at 1:25 PM, HAREESH K V <haree...@gmail.com> wrote:

First buttering to be done on p91 side using ERNiCr3 using the heating procedures(Preheat+post heat+pwht) for p91. This buttering should be such that there should be 13mm of buttering (min) available after weld edge prepration of p91.

Then weld p91 with p8 with the same filler wire(ENiCr3) as normal SS welding. No heating required.

[the logic of 13mm buttering (min) is the haz area should be within the buttering limit when p91 is welded with p8]

 

----------------------
Hareesh K V
+91-9447625012

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Hareesh K V
+91-9447625012

[HAREESH K V]

First buttering to be done on p91 side using ERNiCr3 using the heating procedures(Preheat+post heat+pwht) for p91. This buttering should be such that there should be 13mm of buttering (min) available after weld edge prepration of p91.

Then weld p91 with p8 with the same filler wire(ENiCr3) as normal SS welding. No heating required.

[the logic of 13mm buttering (min) is the haz area should be within the buttering limit when p91 is welded with p8]

 

----------------------
Hareesh K V
+91-9447625012

On Fri, Mar 8, 2013 at 6:17 PM, kannayeram gnanapandithan <kgpan...@gmail.com> wrote: