Wednesday, December 31, 2014

[MW:22664] Re: Comparision of UT & RT ( Justifying UT )

Pls explain in brief about Acceptance criteria comparison for RT,UT, PT (Casting/ Forging) as per ASME, EN,ASTM standards?

On Friday, July 4, 2008 12:23:26 PM UTC+5:30, vhr...@gmail.com wrote:
Dear All,
 
We awared Hydro power project. There is specifically requirments of NDT method RT for all weld joint ( i.e for all class of joint ).
 
We never used RT in normal practice for all project. Now for convince to client We required comparision sheet between RT & UT to justifying UT is better than RT.
 
Request to send Comparision of RT & UT. Please send comparision & revert back soon. We have to submitt QAP urgentely.
 
 
Regards,
 
Vikas Rana
 

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[MW:22663] Hardness Value of Inconel 625

Dear Experts,

What is the hardness value of Inconel-625 (ASTM B444 UNS N06625)?


Regards,
LALU
LINKS MIDDLE EAST

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[MW:22662] Re: Corrosion & Painting

Dear,
 
Depend on your description, I can't tell which degree of corrosion in your plant, but I try to give you some advices.
 
First, try to find the root cause about corrosion, such as, whether it is materials selection issue, or the plant locate in coast, or not good insulation work, etc.
 
Second, according to accurate root cause, plant decide to do painting. Then, you should find the qualify supplier of painting, also, selection proper coating and  construction process is based on process service condition. So, clarify meeting of cross-displinary is necessary!
Good luck!
 
Leon

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Monday, December 29, 2014

[MW:22661] Which welding electrode suitable for SMAW of ASTM 135 ERW pipe to pipe welding & ASTM 53 ERW pipe to pipe welding.

You can try with E6010 or E7018, what grades are you going to weld?

Sergio Muñoz
IWE-IIW
http://Weld-ING.blogspot.com

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[MW:22661] Re: Deadline approaching - spam message//ignore pl.

Apologies, pl. ignore the spam...

On Monday, December 29, 2014 1:33:37 PM UTC+4, gil.l...@yahoo.com wrote:


View full mail here

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Re: [MW:22658] Corrosion & Painting

Hello Dear,
I think so you need to have HVOF high velocity oxygen fuel coating on those equipment's. It will be expensive but surely it can resist wear & tear done by sand. You can check more details. This is modern technique of painting may be the best one also.

Regards,
Addil Yusaf   

On 24 December 2014 at 15:18, Ali Al-Zawamri <alzawamri@gmail.com> wrote:
Dear,

We are facing a lot of corrosion and rusting in our plant.
Please give your advices on the following:-
  • Best surface preparation where sand plasting can not be done.
  • Best painting to be used in high humid areas and where surface preparation can not be done by sand plasting?
  • After repairs and painting, rusting will take place within one year.
Your input will be highly helpful.

Regards

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Mechanical Engineer 
Daewoo Enginnering & Construction.
Patrind Hydro Power Project Pakistan.
Contact Number : 03448834732

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[MW:22658] Deadline approaching



View full mail here

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Sunday, December 28, 2014

[MW:22657] Which welding electrode suitable for SMAW of ASTM 135 ERW pipe to pipe welding & ASTM 53 ERW pipe to pipe welding.

Dear experts,


Please advise me for selection of welding electrode for SMAW/MMA welding 


Which welding electrode suitable for ASTM 135 ERW pipe to pipe welding & ASTM 53 ERW pipe to pipe welding.




Regards ,


Amit Shelar

9769203039

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RE: [MW:22656] Max. temp. attainable by CS tubes to avoid creep rupture

For a short term exposure the specified temperature will not cause creep
except overheating. In general the covection section tubes are designed
for no flow condition for certain hours. Since your are measuring the
skin temperature the tube inner wall temperature will be less than skin
temperature.
regards,
Gopalsankar
On 2014-09-30 07:45, pgoswami wrote:
> Hi Jignesh and Dr Dilintas,
>
> A short note on this scenario, from Utility Operators point of view.
> C.S will be pushed well above the upper limit and cause overheating of
> SA 106 GrB. Reason excessively higher temperature(well above design
> limits) plus dry(no flow condition).
>
> It would advisable to switch to Cr-Mo steel for better design, and
> avoid premature failure. FEA is good for all other scenario, but Creep
> is totally unpredictable.
>
> Thanks.
>
> Pradip Goswami, P.Eng,IWE
> Welding & Metallurgical Specialist
> Ontario, Canada
> pgoswami@quickclic.net
> pradip.goswami@gmail.com
> http://ca.linkedin.com/pub/pradip-goswami/5/985/299 [1]
>
> -------------------------
> FROM: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com] ON BEHALF OF
> george.dilintas@gr.bureauveritas.com
> SENT: Tuesday, September 30, 2014 4:29 AM
> TO: materials-welding@googlegroups.com
> SUBJECT: Re: [MW:22020] Max. temp. attainable by CS tubes to avoid
> creep rupture
>
> The max temp. for SA-106 GrB is 800 deg F (as indicated by ASME
> B31.1).
> Your temperature is close to this limit.
> However, creep is not only a function of time. It is a function also
> of the load (pressure or other).
> So I would suggest that you carry a static calculation and you compare
> the resulting stress with the allowable stress at 800 degF (for
> SA-106GrB, this is 10,8 ksi).
> If you are below you have not to worry about.
> Otherwise you will need to perform FEA with non linear Finite Elements
> simulating creep
>
> best regards
>
> Dr. Georgios Dilintas
>
> Authorized Nuclear Inspector
> Authorized Inspector Supervisor
>
> I&F REGIONAL TECHNICAL MANAGER
> BUREAU VERITAS HELLAS
>
> Tel: +30 210 40 63 113/4
> Fax: +30 210 40 63 118
> Cell: +30 69 44 64 62 04
> _(See attached file: Dilintas_George.vcf)_
>
> Jignesh Desai ---30/09/2014 10:52:54---Design Code : ASME Sec I, API
> 560 & API 530 Service: Non Corrosive.
>
> From: Jignesh Desai <jignesh.desai.met@gmail.com>
> To: materials-welding@googlegroups.com
> Date: 30/09/2014 10:52
> Subject: [MW:22019] Max. temp. attainable by CS tubes to avoid creep
> rupture
> Sent by: materials-welding@googlegroups.com
>
> -------------------------
>
> Design Code : ASME Sec I, API 560 & API 530
> Service: Non Corrosive.
>
> We have CS tubes in the convection section (BFW service) of furnace
> and we are planning to operate during the emergency shut down (plant
> black out) for short duration of about an hour at higher temperature
> then the design temp. (425° C).
> At this short duration of time the water tubes is going to see the no
> BFW flow condition (DRY).
>
> Query: What is the max. temperature attainable (intermittent - 01
> hour) by CS tubes (to avoid creep rupture). How much the temperature
> above the design temperature (425° C) can the CS tube be pushed for
> this short operation of time (01 hour)?
>
> Regds/Jignesh
>
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Saturday, December 27, 2014

Re: [MW:22654] Copper alloy electrodes

 
Nearest available electrode could be monel type with 70 Cu - 30 Ni.

GMAW followed by SMAW is suitable GTAW.

ECuNi- Coated Electrode
Copper-nickel alloys and selected bronzes to themselves and to Alloy
400 or Alloy 200
Electrodes of the Copper-nickel classification are used for shielded metal
arc welding or wrought or cast 70/30, 80/20 and 90/10 copper-nickel alloys
to themselves or to each other. They also are used for welding the clad side
of copper-nickel clad steel. Preheating is generally not necessary.
 
ERCuNi - Filler wire.
Copper-nickel alloys and selected bronzes to themselves and to Alloy
400 or Alloy 200.
In Copper-nickel filler metals, the nickel addition strengthens the weld metal
and improves the corrosion resistance, particularly against salt water. The weld
metal has good hot and cold ductility. Copper-nickel filler metals are used for
welding most copper-nickel alloys. When using the GTAW or GMAW processes,
preheating is not required. Welding is done in all positions

Sridhar.

 


From: Yogesh Pawar <yogeshpawar5@gmail.com>
To: materials-welding@googlegroups.com
Sent: Thursday, 25 December 2014 12:19 AM
Subject: [MW:22633] Copper alloy electrodes


Dear all,

Please advice Electrodes details for Copper alloy Materails
Material SB171 C70600 (90Cu-10Ni)
P.No.34 to P.No.34
Thk-40mm
Which welding process is better SMAW or GTAW

Thanks & Regards
Yogesh P.
 


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Re: [MW:22655] Grinding of weld joints after PWHT

No problem. You can grind portion where you get your hardness test . If you want to grind all around or removing the reinforcement, control the heat produce by grinding. Next time, do it before pwht.

At Dec 27, 2014, 1:26:05 AM, Umar Makrani<'firoz.makrani@gmail.com'> wrote:
I think no. My belief is reinforced by sometimes we replace the pwht with temperbead in which we grind the half bead. Expect views from other experts.

Thanks & Regards

Firoz Ahmed R. Makrani, PMP®

Sr. Inspection Engineer

Description: safety_head_600X90_velosi its comingOn 26 Dec 2014, at 13:03, Ali Al-Zawamri <alzawamri@gmail.com> wrote:


Dear,


Grinding afte PWHT may create or hardning the weld joint. So it is better to do before PWHT.

waiting for the team input.


Thanks,


On 26 Dec 2014 10:50, "Vikas Sahu" <viksahu@gmail.com> wrote:
Dear sir,
Please give reference /code/standard/writeup for Grinding (upto what extent) permitted or not after PWHT of Weld Joints of piping.

Regards
Vikas sahu




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Re: [MW:22652] Grinding of weld joints after PWHT

Grinding does not affect material after pwht as temp are too low. Grinding is done for removing thermo couples all the time. Even temporary supports are cut and ground after pwht.

Rgds
Prakash. G.
Independent Consultant. ASME/ISO
From: Umar Makrani
Sent: Saturday, 27 December 2014 07:58
To: materials-welding@googlegroups.com
Reply To: materials-welding@googlegroups.com
Subject: Re: [MW:22651] Grinding of weld joints after PWHT

I think no. My belief is reinforced by sometimes we replace the pwht with temperbead in which we grind the half bead. Expect views from other experts. 

 

 

Thanks & Regards

 

Firoz Ahmed R. Makrani, PMP®

Sr. Inspection Engineer

Description: safety_head_600X90_velosi its comingOn 26 Dec 2014, at 13:03, Ali Al-Zawamri <alzawamri@gmail.com> wrote:


Dear,

Grinding afte PWHT may create or hardning the weld joint.  So it is better to do before PWHT.
waiting for the team input.

Thanks,

On 26 Dec 2014 10:50, "Vikas Sahu" <viksahu@gmail.com> wrote:
Dear sir,
              Please give reference /code/standard/writeup for Grinding (upto what extent) permitted or not after PWHT of Weld Joints of piping.

Regards
Vikas sahu

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[MW:22652] pqr accaptance for A608 HP45 alloy

Dear experts

I have problem here for pqr acceptance for the material A608 HP 45 alloy since this material I was unable to find in AS ME IX . So please suggest me what code I have to use to qualify the par and electrode is (Therminat 25/35).
Best regards
Narender teddy.M

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[MW:22649] AWS / SWPS For EH36 combine to 316L

Dear sir,

I'm new in this group,

can you advise to me which one  AWS / SWPS for STEEL PLATE EH36 combine to SUS316L  ( FCAW ) ,

Regard,
MajiD

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Friday, December 26, 2014

RE: [MW:22649] Grinding of weld joints after PWHT

PWHT is the last activity, and after weldingworks completion, hence no meaning doing grinding after PWHT.

Lakshman kumar.B
Project manager.
9440031459

From: Ali Al-Zawamri
Sent: ‎26-‎12-‎2014 20:24
To: materials-welding@googlegroups.com
Subject: Re: [MW:22647] Grinding of weld joints after PWHT

Dear,

Grinding afte PWHT may create or hardning the weld joint.  So it is better to do before PWHT.
waiting for the team input.

Thanks,

On 26 Dec 2014 10:50, "Vikas Sahu" <viksahu@gmail.com> wrote:
Dear sir,
              Please give reference /code/standard/writeup for Grinding (upto what extent) permitted or not after PWHT of Weld Joints of piping.

Regards
Vikas sahu

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Re: [MW:22651] Grinding of weld joints after PWHT

I think no. My belief is reinforced by sometimes we replace the pwht with temperbead in which we grind the half bead. Expect views from other experts. 

 

 

Thanks & Regards

 

Firoz Ahmed R. Makrani, PMP®

Sr. Inspection Engineer

Description: safety_head_600X90_velosi its comingOn 26 Dec 2014, at 13:03, Ali Al-Zawamri <alzawamri@gmail.com> wrote:


Dear,

Grinding afte PWHT may create or hardning the weld joint.  So it is better to do before PWHT.
waiting for the team input.

Thanks,

On 26 Dec 2014 10:50, "Vikas Sahu" <viksahu@gmail.com> wrote:
Dear sir,
              Please give reference /code/standard/writeup for Grinding (upto what extent) permitted or not after PWHT of Weld Joints of piping.

Regards
Vikas sahu

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Re: [MW:22647] Galvanized steel sheet surface inspection

Dear Zakaria, 

You can refer to ASTM A 123 for structural products.

On 25 December 2014 at 15:46, Zakaria ghrab <zakaria.ghrab@gmail.com> wrote:
Dear expert,
 
  Could you give us guidelines and reference code/standard (ASTM or ASME)  to inspect Galvanized steel sheet/plate and pipes surface defects.
 
Kind regards.

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زكرياء غراب
GHRAB Zakaria
SEME Redeveloppement Project
Geocean - Project QC Engineer
Tunisia : +216 96 635 805
Morocco : +212 6 06 58 88 56
Bénin : +229 97 128 387


Yesterday is the pass, tomorrow is the future; and today? Today is the present, the gift: Enjoy it!

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Thanks & Regards,

A Bharat Kumar
+91 9989717650

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Re: [MW:34832] Inquiry about Single Bevel with Back Grinding

Dear Uday, As per your question that one is called with backing only,Simple both side you are welding it is backing with strip or without st...