Re: [MW:32428] PREHEAT TEMPERATURE

No where mention the restriction on maximum preheat temp as per mention code ASME B31.3, ref 330 and 330.2,,,  and API RP 582, 8 preheat and interpass temp.  Restriction on Max interpass tem only to avoid coarse grain that too for Impact requirements

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Sun, May 23, 2021 at 9:14 AM Manoj Mumbai <manojacgnr@gmail.com> wrote:

ASME B31.3 and RP582

On Sat, May 22, 2021 at 3:26 PM Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:

Could you give code ref for control of preheat on maximum side

On Sat, May 22, 2021, 3:10 PM Gerry Lourens <Gerry.Lourens@newage-eng.com> wrote:

There are no limits to the Preheat temperature provided that there are no toughness requirements.

If toughness (impacts) are required :

the maximum inter-pass temperature qualified equals the maximum preheat temperature.

Best Regards,
	Gerry Lourens Welding Engineer New Age Engineering Solutions
	M: +27 62 192 1207 T:  +27 17 631 5282 F:  +27 (0)86 616 9701 E:  gerry.lourens@newage-eng.com A:  3 York Street, Evander, 2280

On Sat, May 22, 2021 at 5:49 AM Manoj Mumbai <manojacgnr@gmail.com> wrote:

Dear Experts,

The preheat temperature shall not be less than 55 deg. C as per QW-406.1 but  not specified a maximum how much it can be from the temperature noted in PQR as preheat temperature is minimum temperature and interpass temperature is the maximum temperature.

My question , Is there any limitation to increase preheat temperature than mentioned in PQR. suppose PQR temperature is Ambient, say 38 deg. C, can we increase preheat temperature to 204 deg. C.  I have a qualified procedure of P6 material at ambient temperature 38 deg.C now I have to include preheat temperature.

Thanks in advance for your expert opinion.

Manoj.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
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 view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CACgUO5%3DH94mRN3EHOgHBCxM3%2BuEJp3uqYP6qOrOjVbzrD0_bxg%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
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 view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAFgehWe%3DgfP78ODmmJBmWd%2B28HhfBD3Jtk5tC2SrYbt%2B7x0SGA%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
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 view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAJzm4eNv8zRKZ%2Bi-yZcPoKKGAGVOE4WfO_cztr3s8k4T5sXJtw%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
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 view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CACgUO5mUfYrriofY2QSXT26TX%2BQ86CE513z8Uq1CSFcXQc3QqA%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
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 view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAJzm4eMSQKqxiFhpstOwk%3DQzifpLvdrPSV6Y9kVV%2B8V17y%2BNHw%40mail.gmail.com.