for mechanical properties ref: API 5L (2000) line pipe specifications,6.1 and 6.2 Babu.P.R
--- On Fri, 6/13/08, asmat ullah <aubajwa@gmail.com> wrote:
From: asmat ullah <aubajwa@gmail.com>
Subject: [MW:861] API 5L Material poperties
To: "Materials & Welding" <materials-welding@googlegroups.com>
Date: Friday, June 13, 2008, 4:16 AM
Hi friend, could any body let me know where i can find mechanical properties (other than tensile and yield strength) of API 5L A, B, X42, X52, X60.., .....material? I am interested in properties like poisson ratio, modulus of elasticity (young's modulus)... etc.. please help Best Regards, Asmat Ullah
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.
-~----------~----~----~----~------~----~------~--~---
Just the below link for more information, interesting one http://www.unm.fr/en/general/en13445/published hormonised stanadrds for Directive 97/23/EEC can be seen at
http://ec.europa.eu/enterprise/newapproach/standardization/harmstds/reflist/equippre.html
and
http://www.newapproach.org/Directives/ProductFamilies.asp?97/23/EC The attached list contains references to harmonised standards for pressure equipment and harmonised supporting standards for materials used in manufacturing pressure equipment. The follwoing pretext taken from a CEN link may be helpful
A harmonised standards is a standard considered by the European Commission as satisfying some of the directives essential safety requirements. Harmonised standards are covered by three types of European Standard:- * Harmonised Product Standards
These are application codes that cover the design and manufacture of Pressure Vessels, Boilers and Pipework * Harmonised Support Standards
Welding, NDT and other standards that supplement the application codes. * Harmonised Material Standards
A material specified in a harmonised standard will satisfy the requirements of the directive in terms of ductility, toughness and strength but does not guarantee that the material will be suitable for a specific application.
Each harmonised standard will contain an annex stating which essential safety requirements it satisfies. The advantage of using these standards is that no additional justification is required that essential safety requirements have been met and providing the standards have been correctly applied the design of the equipment can not be challenged.
Another advantage of using Harmonised Standards is that they provide an interpretation of the directive. For example if a pressure vessel is to operate below zero the impact tests on the material and welding procedures have to be carried out the lowest operating temperature the vessel will experience according to ESR 7.5. This is not current practice as far as either PD5500 or ASME VIII is concerned as both these standards permit, under certain circumstances, warmer impact test temperatures. Harmonised Standards are not essential, any appropriate standard can used but the satisfaction of essential safety requirements must proved. Both PD5500 and ASME VIII have produced annexes stating how and which essential safety requirements they claim to satisfy, these annexes have not been approved by the European commission and therefore neither standard can claim to be harmonised. Note PD5500 has nothing to do with the PED, it is simply the latest revision of BS5500, it no longer has the status of a British Standard because it will conflict with BSEN13445. It is now a Published Document rather than a standard, This will make no difference to it as it will continue to be supported as long as its popularity remains The harmonised standard for the qualification of welding personnel is EN ISO 9606, for operating procedures it is EN ISO 15614. (Note EN ISO 15614 only satisfies the requirements of E.S.R 3.1.2 it does not satisfy the requirements for welding consumables stated in E.S.R 4)
-----Original Message-----
From: PED2000@googlegroups.com on behalf of Rajesh
Sent: Sat 14/06/2008 17:37
To: Process Equipment Design
Cc: estamd@graphiteindia.com
Subject: [PED:93] PED Harmonised Standard for Design
Dear All, I undrstand that Harmonised Standard For pressure vessel design for
PED is being published. BSEN13445. I have some querries. - If this help us in selection of material.
- When this standard is likely to be published. Regrads Rajesh --~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.
-~----------~----~----~----~------~----~------~--~---
Best would be provide electrical heating pads for the joints so that the minimum preheat can be maintained during the entire welding cycle
Date: Wed, 11 Jun 2008 23:30:04 -0700
From: tagore.tbn@gmail.com
To: materials-welding@googlegroups.com
Subject: [MW:860] Re: Site welding & heat treatment for ASTM A 387 Gr 22 CL1
Basically Cr-Mo steels need Pre heating and post heating when ever there are breaks for lunch, tea , shift changes. Interpass temperature maintenance is a MUST . Therfore even in site , the whole weld zone shall be in an enclosed environment so that there are no wind effects . For that matter any welding in an open wind environment is not advised.
Regards,
Tagore
On Wed, Jun 11, 2008 at 8:15 PM, < Sudipto_Banerjee@fwuk.fwc.com> wrote:
Pls. let me know if there should be any potential concerns of a reactor
made of ASTM A 387 Gr 22 CL1 in SITE ASSEMBLY with regards to welding, site
heat treatments and others.
If there is, then pls. let me know what are the points to be taken care by
the vendor.
Thanking you.
Best Regards,
Sudipto Banerjee
Man. no. B 4512
Equipment Engg. Department
Office no. 0091-(0)44-6622 2947
Mobile 1 (official) : 0044- 0 7733287865
Mobile 2 (personal) : 0091-9930005960
=======================================================
Confidentiality Notice
This communication and the information it contains:-
(a) Is intended for the person(s) or organisation(s) named above and for no other person(s) or organisation(s).
(b) May be confidential, legally privileged and protected in law. Unauthorised use, copying or disclosure of any of it may be unlawful. If you have received this communication in error, please contact us immediately by email at Postmaster@fwuk.fwc.com.
=======================================================
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.
-~----------~----~----~----~------~----~------~--~---
Dear Paresh,
How are you & your family?
Warm regards,
Gurudas D. Madye --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ 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. -~----------~----~----~----~------~----~------~--~---
Modulus of elasticity is direct relation of stress vs strain, that you need to calculate based on the load acting on that object. Similar way poisson ratio also comes from displacement strain, that is what I remember from the text we read few decades back at college, thou I have never used it in my career till now. I don't know(think) there will a fixed value for the grades mentioned below, members please share really is there any tabulated values (possible) in any of the hand books. -----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of asmat ullah
Sent: Friday, June 13, 2008 4:16 AM
To: Materials & Welding
Subject: [MW:861] API 5L Material poperties Hi friend, could any body let me know where i can find mechanical properties (other than tensile and yield strength) of API 5L A, B, X42, X52, X60.., .....material? I am interested in properties like poisson ratio, modulus of elasticity (young's modulus)... etc.. please help Best Regards, Asmat Ullah --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ 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. -~----------~----~----~----~------~----~------~--~---
Hi friend, could any body let me know where i can find mechanical properties
(other than tensile and yield strength) of API 5L A, B, X42, X52,
X60.., .....material? I am interested in properties like poisson ratio, modulus of
elasticity (young's modulus)... etc.. please help Best Regards,
Asmat Ullah --~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.
-~----------~----~----~----~------~----~------~--~---
People involved in the valve application, take care before placing order to know the component materials of the valve. The 17-4PH usually used in the stem construction have failed like the below. Tyco valves has observed similar failures in thier inhouse research and has reported the same on using 17-4PH. And are not recommending this material unless specifically asked for. As all suppliers and buyers do not take much interest in the small components of the valve, it will be the responsibility of the buyer to take note of these before ordering and the complete knowledge of the service involved. Alternatives would be FXM19, F51, F6a Cl4 depending on temp. and service.(17-4PH is 17Cr-4Ni-Pricipatation Hardened) http://www.hghouston.com/x/25.html (Photo attached for members not having net access.)  Nomarski intereference contrast photograph of the microstructure of a 17-4PH stainless steel sleeve bearing overlayed with sintered tungsten carbide. A hydrogen embrittlement crack has initiated at the overlay/base metal interface. A mechanical crack in the overlay permitted access of a corrosive downhole environment to the 17-4PH stainless steel base metal. Vilellla's etch. (~65X) With regards,
Kannan.
Basically Cr-Mo steels need Pre heating and post heating when ever there are breaks for lunch, tea , shift changes. Interpass temperature maintenance is a MUST . Therfore even in site , the whole weld zone shall be in an enclosed environment so that there are no wind effects . For that matter any welding in an open wind environment is not advised. Regards, Tagore On Wed, Jun 11, 2008 at 8:15 PM, < Sudipto_Banerjee@fwuk.fwc.com> wrote:
Pls. let me know if there should be any potential concerns of a reactor
made of ASTM A 387 Gr 22 CL1 in SITE ASSEMBLY with regards to welding, site
heat treatments and others.
If there is, then pls. let me know what are the points to be taken care by
the vendor.
Thanking you.
Best Regards,
Sudipto Banerjee
Man. no. B 4512
Equipment Engg. Department
Office no. 0091-(0)44-6622 2947
Mobile 1 (official) : 0044- 0 7733287865
Mobile 2 (personal) : 0091-9930005960
=======================================================
Confidentiality Notice
This communication and the information it contains:-
(a) Is intended for the person(s) or organisation(s) named above and for no other person(s) or organisation(s).
(b) May be confidential, legally privileged and protected in law. Unauthorised use, copying or disclosure of any of it may be unlawful. If you have received this communication in error, please contact us immediately by email at Postmaster@fwuk.fwc.com.
=======================================================
--~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ 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. -~----------~----~----~----~------~----~------~--~---
For Cr -Mo steels the most important factor is the tempering temperature of the procured materials. If he materials are procured in Normalized & tempered condition, and if the PWHT temperature as occured is lesser than the TEMPERED temp. of the procured state , then it should pass the mechnaical tests . As suggested by mr.Sachin, PQR needs to be established and at the same time the parent materials also needs to be tested for tensile, yield in general and impact test if the specification of project vis-a-vis MDMT call so. Regards, tagore On Wed, Jun 11, 2008 at 8:47 AM, Muhammed Ibrahim < ibratech@gmail.com> wrote:
Dear Sachin,
Code says about the increase or decrease of time at a temperature. atleast 80 percent of the PQR shall be in production. I am not clear about the time it discuss. 2008/6/11 sachin sankhe < sachin.sankhe@rediffmail.com>:
Dear Rishi,
Hardness wont be suffucient to accept since we have changed grain structure to certain extent by exceding PWHT temp.resulting in change in mechanical properties.
In that case you need to re-qualify the procedure with new PWHT temperature and all mechanical test to be done as per relevant specification requirement.
If the test passes then we can accept the production joint
If it fails then analysis of failure to be done and results to be conveyed to client.
Based on criticality of the job,let client decide wether to reject or do PHWT gain.
If they propose PWHT again then subsequently we have to qualify procedure with 2 times PWHT.
OTHER MEMBERS ARE ALSO WELCOME TO GIVE THEIR OPINION.
Regards
Sachin.Sankhe
On Wed, 11 Jun 2008 Singh Rishi Raj(Tasnee Site) wrote : >Dear Friends, > >Staying with the subject line of heat treatment, I wanted to know (since >long ) -------- > > > >What should be done if the temperature while doing PWHT exceeds the >range mentioned in WPS ?? > > > >For example lets say- > >A weld between A335 P11 ( P 4 Gr 1) , thickness 17mm. WPS ( & B 31.3 >) has the PWHT temp as 704-746 deg C. > >If the temp of PWHT cycle exceeds the higher value by 40deg. >Centigrade, what should be done? > >Can the joint be accepted based on the hardness value? > > > >Please also provide references with your answer. > > > >Best Regards, > >Rishi Raj Singh > >________________________________ > > From: materials-welding@googlegroups.com >[mailto: materials-welding@googlegroups.com] On Behalf Of Prabhakar h >Sent: 09 June 2008 16:25 >To: materials-welding@googlegroups.com >Subject: [MW:835] Re: Clarification on Heat treatment-Reg. > > > >Dear Shabbir, > > > >Thanks a lot for your prompt response and sorry even i cud not catch up >quite a while as i was held up with my ASME Audits. > > > >Your Explanation was usefull and it would be better if you cud tell us >at what conditions we go for the HT and how the same is selected??? > > > >Prabhakar.H > > > >On 5/4/08, shabbir ahmad < shabbir.ahmad7@gmail.com> wrote: > >Dear Prabhakar, > > > >Nortmalizing: The steel is heated 50 deg. cent grade beyond the upper >critical tempreture( generally 900 to 940), once the calculated soaking >time has elapsed the steel is removed from the furnce to cool in still >air, This produce smaller n fine grain structure that has high toughness >n strength.In short u can say normalizung makes steel tougher n strong. > > > >Stress Reliving: Steel heated upto 550-650 d.c..The plastic flow of >sresses increased as tempr. rises, relieving locked in elastic residual >welding stress. > > > >Tempering: The steel is re-heated after hardening and the balance of >hardness & toughness is adjusted as the temp range 200 - 723deg. cent. > > > >at 723 d.c. all the martensite has been tempered removing the >brittleness 7 returning the toughness and some ductility. Normally >tempering carried out to rebalance the propertied of thermally hardened >steels. > > > >solution Annealing : generally carried out on Stainless steel, this >produces large n coarse grain.Heating the steel above 1040 deg.centi >grade and quench in oil. > > > >Thanks > > > >shabbir > > > >On 5/3/08, Prabhakar h < hb.prabhakar@gmail.com> wrote: > > > > Dear all, > > > > Can anyone let me know what is the difference bet'n >Normallising/Stress releiving/Tempering/Solution anneling.. > > > > I always get confussed and cudnt get a better idea.... > > > > Is there anyone to help it out....? > > > > Prabhakar.H > > </div > > >> Sachin.Sankhe
Engineer-Inspection
Aker Kvaerner-Malaysia
Mobile:012-2896901
Email1:Sachin.Sankhe@akerkvaerner.com
Email2:Sachin.sankhe@rediffmail.com
--~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ 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. -~----------~----~----~----~------~----~------~--~---
Dear Mr.Ragu, Thanks for warning me. I just forget that Codes & standards should not be
copied in any form. Thanks once again. Regards, S.Mathusoothanan -----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Bathula Raghuram
(Mumbai - PIPING)
Sent: 12 June, 2008 8:01 AM
To: materials-welding@googlegroups.com
Subject: [MW:857] Diffusible H2 content and Hydrogen cracking study
Dear Mr Mathusoothanan
Apriciate your posting, but I have to approve this message without the
attchements, since it is agianst the rules of this group (and all
members are requested to not post any codes/standards as attachements
in the group) Thanking you for your co operation! -----Original Message-----
From: mathu.subramanian [mailto:mathu.subramanian@kharafinational.com]
Sent: Thursday, June 12, 2008 10:20 AM
To: materials-welding@googlegroups.com
Subject: 851] Diffusible H2 content and Hydrogen cracking study Dear friend, E6013 is not the compatible electrode to weld Cr-Mo steels and it is
normal
carbon steel electrode. In Cr-Mo steels so many grades are there. Gr.1,
Gr.11, Gr.22, Gr.5, Gr.9, Gr.91. Please refer attached ASME Specs for
Electrodes & Materials. According to grade of material welding
electrodes is
to be selected. As said by Mr Raghuram, two different AWS classifications can not be
compared for
diffusible hydrogen level. Two hydrogen levels of same AWS
classification
should be selcted. I think the material grade you have selected might be Grade 9. Regards. S.Mathusoothanan -----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Bathula
Raghuram
(Mumbai - PIPING)
Sent: 12 June, 2008 6:31 AM
To: materials-welding@googlegroups.com
Subject: [MW:851] Diffusible H2 content and Hydrogen cracking study
What type of Cr-Mo steel it is?
What is the basis of selecting E6013 for Cr-Mo steel?
Why diffusion hydrogen level required for E6013, when it is not a low
hydrogen electrode?
One can't compare the stress value with two different AWS
classifications; instead you can study by taking two different batches
of E9015B9 electrodes with different diff H2 levels (not comparing with
E6013) and test it!
Members please share your thoughts -----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of mech
Sent: Wednesday, June 11, 2008 7:49 PM
To: Materials & Welding
Subject: [MW:846] on preheating effect
dear sir
i am a welding engg student and doing project on hydrogen cracking
of cr-mo steel by using implant test method.
the following result were observed
electrode diff hydrogen
level critical stress E6013 (ruttile type) 5
ml 456 mpa
E9015 B9
10.6ml 500 mpa
according to theory if hydrogen level increases critical cracking
stress will decreases but in my exp critical cracking stress is coming
more in low level of hydrogen i would like to have your comment on this result --~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.
-~----------~----~----~----~------~----~------~--~---
Dear Mr Mathusoothanan Apriciate your posting, but I have to approve this message without the
attchements, since it is agianst the rules of this group (and all
members are requested to not post any codes/standards as attachements
in the group) Thanking you for your co operation! -----Original Message-----
From: mathu.subramanian [mailto:mathu.subramanian@kharafinational.com]
Sent: Thursday, June 12, 2008 10:20 AM
To: materials-welding@googlegroups.com
Subject: 851] Diffusible H2 content and Hydrogen cracking study Dear friend, E6013 is not the compatible electrode to weld Cr-Mo steels and it is
normal
carbon steel electrode. In Cr-Mo steels so many grades are there. Gr.1,
Gr.11, Gr.22, Gr.5, Gr.9, Gr.91. Please refer attached ASME Specs for
Electrodes & Materials. According to grade of material welding
electrodes is
to be selected. As said by Mr Raghuram, two different AWS classifications can not be
compared for
diffusible hydrogen level. Two hydrogen levels of same AWS
classification
should be selcted. I think the material grade you have selected might be Grade 9. Regards. S.Mathusoothanan -----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Bathula
Raghuram
(Mumbai - PIPING)
Sent: 12 June, 2008 6:31 AM
To: materials-welding@googlegroups.com
Subject: [MW:851] Diffusible H2 content and Hydrogen cracking study
What type of Cr-Mo steel it is?
What is the basis of selecting E6013 for Cr-Mo steel?
Why diffusion hydrogen level required for E6013, when it is not a low
hydrogen electrode?
One can't compare the stress value with two different AWS
classifications; instead you can study by taking two different batches
of E9015B9 electrodes with different diff H2 levels (not comparing with
E6013) and test it!
Members please share your thoughts -----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of mech
Sent: Wednesday, June 11, 2008 7:49 PM
To: Materials & Welding
Subject: [MW:846] on preheating effect
dear sir
i am a welding engg student and doing project on hydrogen cracking
of cr-mo steel by using implant test method.
the following result were observed
electrode diff hydrogen
level critical stress E6013 (ruttile type) 5
ml 456 mpa
E9015 B9
10.6ml 500 mpa
according to theory if hydrogen level increases critical cracking
stress will decreases but in my exp critical cracking stress is coming
more in low level of hydrogen i would like to have your comment on this result --~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.
-~----------~----~----~----~------~----~------~--~---
In addition to what Mr Sachin wrote, Refer para F331 (Appendix F), you could land up in re tempering the material (of course re qualification of your procedure too), also the salvage is depends on operating temperature (max) and the holding time at higher temp during HT. Its definitely not an easy solution.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sachin sankhe
Sent: Wednesday, June 11, 2008 8:06 PM
To: materials-welding@googlegroups.com
Subject: [MW:848] Re: 835] Re: Clarification on Heat treatment / PWHT -Reg.
Dear Rishi,
Hardness wont be suffucient to accept since we have changed grain structure to certain extent by exceding PWHT temp.resulting in change in mechanical properties.
In that case you need to re-qualify the procedure with new PWHT temperature and all mechanical test to be done as per relevant specification requirement.
If the test passes then we can accept the production joint
If it fails then analysis of failure to be done and results to be conveyed to client.
Based on criticality of the job,let client decide wether to reject or do PHWT gain.
If they propose PWHT again then subsequently we have to qualify procedure with 2 times PWHT.
OTHER MEMBERS ARE ALSO WELCOME TO GIVE THEIR OPINION.
Regards
Sachin.Sankhe
On Wed, 11 Jun 2008 Singh Rishi Raj(Tasnee Site) wrote :
>Dear Friends,
>
>Staying with the subject line of heat treatment, I wanted to know (since
>long ) --------
>
>
>
>What should be done if the temperature while doing PWHT exceeds the
>range mentioned in WPS ??
>
>
>
>For example lets say-
>
>A weld between A335 P11 ( P 4 Gr 1) , thickness 17mm. WPS ( & B 31.3
>) has the PWHT temp as 704-746 deg C.
>
>If the temp of PWHT cycle exceeds the higher value by 40deg.
>Centigrade, what should be done?
>
>Can the joint be accepted based on the hardness value?
>
>
>
>Please also provide references with your answer.
>
>
>
>Best Regards,
>
>Rishi Raj Singh
>
>________________________________
>
> From: materials-welding@googlegroups.com
>[mailto:materials-welding@googlegroups.com] On Behalf Of Prabhakar h
>Sent: 09 June 2008 16:25
>To: materials-welding@googlegroups.com
>Subject: [MW:835] Re: Clarification on Heat treatment-Reg.
>
>
>
>Dear Shabbir,
>
>
>
>Thanks a lot for your prompt response and sorry even i cud not catch up
>quite a while as i was held up with my ASME Audits.
>
>
>
>Your Explanation was usefull and it would be better if you cud tell us
>at what conditions we go for the HT and how the same is selected???
>
>
>
>Prabhakar.H
>
>
>
>On 5/4/08, shabbir ahmad <shabbir.ahmad7@gmail.com> wrote:
>
>Dear Prabhakar,
>
>
>
>Nortmalizing: The steel is heated 50 deg. cent grade beyond the upper
>critical tempreture( generally 900 to 940), once the calculated soaking
>time has elapsed the steel is removed from the furnce to cool in still
>air, This produce smaller n fine grain structure that has high toughness
>n strength.In short u can say normalizung makes steel tougher n strong.
>
>
>
>Stress Reliving: Steel heated upto 550-650 d.c..The plastic flow of
>sresses increased as tempr. rises, relieving locked in elastic residual
>welding stress.
>
>
>
>Tempering: The steel is re-heated after hardening and the balance of
>hardness & toughness is adjusted as the temp range 200 - 723deg. cent.
>
>
>
>at 723 d.c. all the martensite has been tempered removing the
>brittleness 7 returning the toughness and some ductility. Normally
>tempering carried out to rebalance the propertied of thermally hardened
>steels.
>
>
>
>solution Annealing : generally carried out on Stainless steel, this
>produces large n coarse grain.Heating the steel above 1040 deg.centi
>grade and quench in oil.
>
>
>
>Thanks
>
>
>
>shabbir
>
>
>
>On 5/3/08, Prabhakar h <hb.prabhakar@gmail.com> wrote:
>
>
>
> Dear all,
>
>
>
> Can anyone let me know what is the difference bet'n
>Normallising/Stress releiving/Tempering/Solution anneling..
>
>
>
> I always get confussed and cudnt get a better idea....
>
>
>
> Is there anyone to help it out....?
>
>
>
> Prabhakar.H
>
> </div
>
>
>> Sachin.Sankhe
Engineer-Inspection
Aker Kvaerner-Malaysia
Mobile:012-2896901
Email1:Sachin.Sankhe@akerkvaerner.com
Email2:Sachin.sankhe@rediffmail.com
|  </Table
| --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ 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. -~----------~----~----~----~------~----~------~--~---
We have used STT welding in Jamnagar phase-I refinery at Fabrication shops,to facilitate SAW machine welding. But we have faced root porosity problems severely. It was difficult to avoid due to heavy wind from the downstream side of the fabrication shops and air from the inside of piping. We have shifted to E6010/GTAW root during the next phases of expansion
and STT machines were not used significantly. STT is a good process provided your welding environment could be
controlled. Regards, P.M.Ganesan Site QC Manager QA&C Department Kharafi National P.O. Box: 24081, Safat - 13101, Kuwait Mob: +965.7202358 Email: p.ganesan@kharafinational.com Website: www.kharafinational.com
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of gajjalla surya
prakash
Sent: 11 June, 2008 6:22 AM
To: materials-welding@googlegroups.com
Subject: [MW:845] Re: Thanx & STT welding procedur please find the attached qualified procedure for STT welding ,STT
welding is sucessfully used in reliance petroleum jamnagar .
surya prakash gajjall
ASSOCIATED ENGINEERING SERVICES
www.aesinspections.net. On 6/10/08, Fly Yalung <fly_ma_alkawari@yahoo.com> wrote:
>
> Dear Sir S. N. Dave,
> Thank yoy for giving us the information. I have another query this
regarding
> STT welding process, does this effecient to use? Does S. Aramco will
require
> another procedure to be approve? If it will require can you help me to
> gother information to make a procedure to STT welding process.
> Thank you very much for the cooperation.
>
> Best Regards,
> Fly L. Yalung - Material Engineer
> M. A. Al-Kawari Est.
> Ph: 03-5721079
> fax: 03-5721471
> fly_ma_alkawari@yahoo.com
>
>
>
> ----- Original Message ----
> From: shailesh dave <snd2988@yahoo.com>
> To: materials-welding@googlegroups.com
> Sent: Sunday, June 8, 2008 6:23:06 AM
> Subject: [MW:832] Re: STI Welding
>
> Do you mean STIR WELDING?
>
> REGARDS,
>
> S.N.DAVE
>
> QA/QC MANAGER
>
> TATA PROJECTS LIMITED
>
> IWPP-III, SHAUIABAH, SAUDI ARABIA
>
> fly_ma_alkawari@yahoo.com wrote:
>
> Whom it may concern;
> Has anyone had encountered STI welding?
>
>
>
> >
> --~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.
-~----------~----~----~----~------~----~------~--~---
Any advice for cast iron welding Sent from Yahoo Mail for iPhone
-
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? ...
-
Definition of buttering from ASME Section IX, QW/QB-492 Definitions: Buttering: the addition of material, by welding, on one or bot...
-
Section I. PRINT READING 3-1. GENERAL a. Drawings . Drawing or sketching is a universal language used to convey all necessary information to...
|
