Sunday, May 31, 2020

Re: [MW:30949] Special process

Please specify your material grade.

On Fri, May 29, 2020 at 9:52 AM Tamizh Selvan <tamizh74@gmail.com> wrote:
Dear Experts

can anybody answer for the below questions.?

What special processes are required on Cr alloy material welding?


 
With Warm Regards,

S.TAMIZH SELVAN,

          

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[MW:30947] longitudinal bend test . Asme Section IX. Welding qualifications.

My question is, according to ASME section IX, if we are going to qualify a welding procedure with 
a stainless steel base metal (P number 8) with a carbon steel (a P number 1), using a stainless steel filler metal . 
Is it necessary to make longitudinal bent specimens to qualify the procedure?
See  QW-161.5 Longitudinal-Bend Tests."Longitudinal bend tests may be used in lieu of the transverse sidebend,
face‐bend, and root‐bend tests for testing weld metal or base metal combinations, which differ markedly in
bending properties between (a) the two base metals, or (b) the weld metal and the base metal"

Are the differences beetween these to metals considered markedly different? 

If in the previous example it was decided to use a Nickel electrode which differs in ductility from carbon steel, would it be necessary to do longitudinal bent ?

I am preparing to the certified welding inspector exam in my country. 

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Saturday, May 30, 2020

Re: [MW:30948] Re: ASME CODE

Section 8 for fired vessels??. Pl elaborate

On Sat, 30 May 2020 8:50 pm k7moorthi, <k7moorthi75@gmail.com> wrote:
1.) An unfired pressure vessel is any type of pressure vessel that is not fired. This means that they are not exposed to combustion or burner fire. Since it is an unfired vessel, there is a lesser risk of overheating.

2.) Whichever stringent, needs to be followed and your client requirement ( project specification) is also mandatory about code selections.

3.) (a) AMSE Sex VIII - is a code & standard used for 1.) Design, 2.) Fabrication, 3.) Testing, 4.) Inspection & 5.) Certification of both Fired & Unfired    
           pressure vessels.
      (b) API 510 - In service Pressure Vessel Inspection Code. … >The code covers inspection, repair, alteration, and rerating activities for pressure vessels 
           and the pressure relieving devices that protect vessels covered by the code.
      (c) BIS IS 2825 : 1969 (Reformed -2017) - CODE FOR UNFIRED PRESSURE VESSELS.
      (d) PD 5500, formerly BS 5500 -----UK Rules For Unfired Pressure Vessels.


 Friday, 29 May 2020 09:52:43 UTC+3, tamizh wrote:
Dear Experts,

Can anyone please tell me  answer.?

1. What is the design code for unfired pressure vessel in ASME code.
2. What is the standard for Unfired pressure vessel  in ASME code.
3.  In case of conflict between Design Code and standards above, which shall govern?


With Warm Regards,

S.TAMIZH SELVAN,

          

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Re: [MW:30941] Welder qualifications B31.3 K328.2.1(b)

Dear Vimal,

What is your design requirement in B31. 3? Chapter v or chapter IX? 

On Fri, May 29, 2020, 7:47 AM Vimal Kumar <jvkumarr@gmail.com> wrote:
Dear Experts,

As per the specified clause in subject., does it mean existing qualified welders are to be requalified..??

Kindly advise

Thanks in Advance

Regards
Vimal Kumar
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[MW:30941] Re: Special process

At least a dozen chromium molybdenum (CrMo) steel combinations exist. One of the more recent alloys consists of chromium, molybdenum, vanadium, niobium (columbium), and nitrogen. This material became popular for use in high-temperature applications, such as gas and coal-fired power plants. However, it is not intended to replace other CrMo types. Each alloy has its own place in the high-strength, low-alloy group of materials.

On Friday, 29 May 2020 09:52:44 UTC+3, tamizh wrote:
Dear Experts

can anybody answer for the below questions.?

What special processes are required on Cr alloy material welding?


 
With Warm Regards,

S.TAMIZH SELVAN,

          

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[MW:30941] Re: Special process

 Explain in brief about your requirments

On Friday, 29 May 2020 09:52:44 UTC+3, tamizh wrote:
Dear Experts

can anybody answer for the below questions.?

What special processes are required on Cr alloy material welding?


 
With Warm Regards,

S.TAMIZH SELVAN,

          

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Re: [MW:30941] Welder qualifications B31.3 K328.2.1(b)

Dear Vimal,
No, it does not say that one has to re-qualify the welders.
It says that :

""b) Test weldments shall be made using the same specification
and type or grade of base metal(s), and the same
specification and classification of filler metal(s) as will be
used in production welding.""

It means if the welders have been qualified as per above conditions, no need to re-qualify the welders.

Hope, your query has been answered.
Thanks,
Best Regards,
Rajnish Dixit
On Friday, 29 May, 2020, 10:47:24 am GMT+7, Vimal Kumar <jvkumarr@gmail.com> wrote:


Dear Experts,

As per the specified clause in subject., does it mean existing qualified welders are to be requalified..??

Kindly advise

Thanks in Advance

Regards
Vimal Kumar
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Re: [MW:30941] ASME CODE

Dear mr Ibrahim's

Thank for your mail..as I  undesrand the code for unfired pressure vessel  is ASME VIII
 But plz refer the trailing mail.they asked stadtda for Undired pressure vessel ..is that also same as ASME SEC VIII  or its differs..plz clarify..

On Sat, 30 May 2020, 11:16 nasr Ibrahim, <elpop102002@gmail.com> wrote:
Dear S. TAMIZH

ASME Section VIII is code for Design, Fabrication, Testing, Inspection, and Certification of both fired and unfired pressure vessels.

On Friday, 29 May 2020, 09:52:35 GMT+3, Tamizh Selvan <tamizh74@gmail.com> wrote:


Dear Experts,

Can anyone please tell me  answer.?

1. What is the design code for unfired pressure vessel in ASME code.
2. What is the standard for Unfired pressure vessel  in ASME code.
3.  In case of conflict between Design Code and standards above, which shall govern?


With Warm Regards,

S.TAMIZH SELVAN,

          

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[MW:30941] Re: ASME CODE

1.) An unfired pressure vessel is any type of pressure vessel that is not fired. This means that they are not exposed to combustion or burner fire. Since it is an unfired vessel, there is a lesser risk of overheating.

2.) Whichever stringent, needs to be followed and your client requirement ( project specification) is also mandatory about code selections.

3.) (a) AMSE Sex VIII - is a code & standard used for 1.) Design, 2.) Fabrication, 3.) Testing, 4.) Inspection & 5.) Certification of both Fired & Unfired    
           pressure vessels.
      (b) API 510 - In service Pressure Vessel Inspection Code. … >The code covers inspection, repair, alteration, and rerating activities for pressure vessels 
           and the pressure relieving devices that protect vessels covered by the code.
      (c) BIS IS 2825 : 1969 (Reformed -2017) - CODE FOR UNFIRED PRESSURE VESSELS.
      (d) PD 5500, formerly BS 5500 -----UK Rules For Unfired Pressure Vessels.


 Friday, 29 May 2020 09:52:43 UTC+3, tamizh wrote:
Dear Experts,

Can anyone please tell me  answer.?

1. What is the design code for unfired pressure vessel in ASME code.
2. What is the standard for Unfired pressure vessel  in ASME code.
3.  In case of conflict between Design Code and standards above, which shall govern?


With Warm Regards,

S.TAMIZH SELVAN,

          

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Friday, May 29, 2020

Re: [MW:30939] ASME CODE

Dear S. TAMIZH

ASME Section VIII is code for Design, Fabrication, Testing, Inspection, and Certification of both fired and unfired pressure vessels.

On Friday, 29 May 2020, 09:52:35 GMT+3, Tamizh Selvan <tamizh74@gmail.com> wrote:


Dear Experts,

Can anyone please tell me  answer.?

1. What is the design code for unfired pressure vessel in ASME code.
2. What is the standard for Unfired pressure vessel  in ASME code.
3.  In case of conflict between Design Code and standards above, which shall govern?


With Warm Regards,

S.TAMIZH SELVAN,

          

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Re: [MW:30939] Ferrite No 7 to 8

I understand 316L with higher chrome will result in better ferrite. But specifications calls for 308L.

On Fri 29 May, 2020, 21:16 Ramin Kondori, <raminkondori@gmail.com> wrote:
You've made a mistake by using 308L filler metal.
Change the WPS and use only 316L filler metal.

Ramin  Kondori
Sr. QA/QC & Welding Engineer
-----------------------------------------------------------
PG-Dip. in Welding Engineering (IWE  AT  0070)
BSc. in Civil Engineering (IUT)
BGAS Painting Inspector
ASNT Level I&II
                        
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On Tue, May 26, 2020 at 10:20 AM Vinay Thattey <vinay.thattey@gmail.com> wrote:
Dear Friends ;  For some technical reasons the expected ferrite   after completion of circumferential welding for SS to SS ( ASTM-A -240 SS 316 rolled pipe )  is 7 to 8 . We R using 308L / 316 L filler and obtained result is max 5 . pl advice .

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Re: [MW:30938] Ferrite No 7 to 8

You've made a mistake by using 308L filler metal.
Change the WPS and use only 316L filler metal.

Ramin  Kondori
Sr. QA/QC & Welding Engineer
-----------------------------------------------------------
PG-Dip. in Welding Engineering (IWE  AT  0070)
BSc. in Civil Engineering (IUT)
BGAS Painting Inspector
ASNT Level I&II
                        
IIW-Logo-Colour-small


On Tue, May 26, 2020 at 10:20 AM Vinay Thattey <vinay.thattey@gmail.com> wrote:
Dear Friends ;  For some technical reasons the expected ferrite   after completion of circumferential welding for SS to SS ( ASTM-A -240 SS 316 rolled pipe )  is 7 to 8 . We R using 308L / 316 L filler and obtained result is max 5 . pl advice .

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[MW:30936] Re: maximum and minimum size of Dish end end SPIN hole plate.

I  HAD A doubt. In one of my job, we made patch of 100 mm. RT was done and the results were 100% satisfactory. Can you please suggest whether the patch of 100 mm is allowed or not. Is that mentioned in any code or so. About spin hole, it is already  mentioned in code under UW 34. The spin hole is allowed till 60 mm but we made a patch of 100 mm and did RT whose results were satisfactory.

Regards,

Arun 

On Thursday, September 6, 2012 at 9:16:10 AM UTC+5:30, hemant wrote:

Dear Sir,

What is the minimum  & Maximum size of spin hole plate as per code reference. Pls reply me.

 

HEMANT SUTHAR

QA/QC

CEPL-SILVASSA

9712973092I 

 

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Re: [MW:30936] ISR VS DHT

You are advised to refer API RP 934 C 


On Fri, May 29, 2020, 1:22 PM Chandan Gupta <crgupta90@gmail.com> wrote:
Hi All,

Kindly suggest on following points.
  • What is difference between ISR & DHT and why it is important?
  • DHT can be performed in lue of ISR? If yes, what kind of precautions need to be taken care?
  • DHT will have less cost and less time consuming cpmpared to ISR?

Br,
Chandan

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[MW:30935] ISR VS DHT

Hi All,

Kindly suggest on following points.
  • What is difference between ISR & DHT and why it is important?
  • DHT can be performed in lue of ISR? If yes, what kind of precautions need to be taken care?
  • DHT will have less cost and less time consuming cpmpared to ISR?

Br,
Chandan

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[MW:30933] ASME CODE

Dear Experts,

Can anyone please tell me  answer.?

1. What is the design code for unfired pressure vessel in ASME code.
2. What is the standard for Unfired pressure vessel  in ASME code.
3.  In case of conflict between Design Code and standards above, which shall govern?


With Warm Regards,

S.TAMIZH SELVAN,

          

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[MW:30933] Special process

Dear Experts

can anybody answer for the below questions.?

What special processes are required on Cr alloy material welding?


 
With Warm Regards,

S.TAMIZH SELVAN,

          

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[MW:30930] Welder qualifications B31.3 K328.2.1(b)

Dear Experts,

As per the specified clause in subject., does it mean existing qualified welders are to be requalified..??

Kindly advise

Thanks in Advance

Regards
Vimal Kumar
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Thursday, May 28, 2020

Re: [MW:30930] Calculation of welding parameters

Dear Charles,

The choice of welding parameters like current and Voltage is dependent on the choice of welding process and consumable used and not on Carbon Equivalent. Carbon equivalent is a weldability factor which gives you sense of materials conditioning prior to welding like preheat temperature and during welding and after welding for the avoidance of welding issues like cracking.

Regards
Rems


On Wed, 27 May 2020 at 16:22, charles
<charlesvj@gmail.com> wrote:
Dear experts,

Pl. Provide the calculation for finding welding parameters like current and voltage if the carbon equivalent of steel is known?. Does this work good for alloy steels also?

Regards,

Charles Jacob

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Re: [MW:30930] Heat treatment requirement for SS310 vs SS347

If u SS310 filler metal, u may land into fissure because of 310 is fully austenitic steel. No pwht is required for dissimilar metal ( stabilization treatment)

On Thu, 28 May 2020 3:23 pm atul khatri, <atul.mnnit@gmail.com> wrote:
Stress relaxation cracking (SRC) could be a reason to have PWHT  for thicker (20mm and above)  stabilized stainless steel grades (mainly H grades)  when operating between 427 deg c to 871 deg c.
if in your case,  above condition doesn't meet than no require to have any heat treatment.
In case  PWHT is required than shall be done near to 890 deg c for these SS grades. Preheat is not required in any circumstances.
If you are welding two pipes than avoid using welded pipes ,since welds in thicker SS grade material (as mentioned above) have more chance of SRC.

Thanks and Regards
Atul Khatri


On Sat, May 23, 2020 at 10:17 AM Kural <kuralen@gmail.com> wrote:
what is design and operating temperature of 347 ? is it pressure application ?

Stabilizing treatment needs some in application if there is risk of  SRC

similarly please let me know what is the application of 310

On Fri, May 22, 2020 at 9:53 AM Arun Nair <arunnair.mundakkal@gmail.com> wrote:
Hello,
 Weld joint between SS310  to SS347 kindly advice about heat treatment require or not? Either pre or post.

ArunNair

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Regards

Kural

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Re: [MW:30924] SS-316L Rusting

Excellent photos, well done,

D Harvey

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Re: [MW:30924] SS-316L Rusting

SS welded regions readily rust in the presence of moisture ,unless iron from welding fume deposits are immediately removed.

It is a very common issue and shows a lack of attention to post welding clean-up.

At least wire brushing is the minimum necessary application.

The rusting is the oxidation of the condensed iron on the SS weldment surface and surrounding zone.

D Harvey, PhD.

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Re: [MW:30924] SS-316L Rusting

Appears to be fluid marks due to contamination or possibly poor pickling done.

On Thu, 28 May 2020, 10:46 Vinod Kataria, <vinod.kataria@blissanand.com> wrote:

Dear Expert,

We have received an email from our customer with pictures showing "rust" on the stainless steel (SS-316L) chambers.  Can anyone please tell me what you see in these pictures from your perspective?

 

 

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RE: [MW:30924] SS-316L Rusting

It is installed in Oil Refinery…..

 

Regards,

Vinod Kataria

 

 

From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of gulzar ali
Sent: 28 May 2020 13:34
To: materials-welding@googlegroups.com
Subject: Re: [MW:30922] SS-316L Rusting

 

 

What type fluid service? 

 

 

 

On Thu, May 28, 2020, 10:22 AM 'Karthik' via Materials & Welding <materials-welding@googlegroups.com> wrote:

It might be due to poor cleaning/pickling process or no pickling and or improper picking/curing time

Thanks& Regards,

 

(Karthik)

Karthikeyan.S

M: +66-892512282
E-mail : karthik6684@yahoo.com


On Thursday, May 28, 2020, 12:16:41 PM GMT+7, Vinod Kataria <vinod.kataria@blissanand.com> wrote:

 

 

Dear Expert,

We have received an email from our customer with pictures showing "rust" on the stainless steel (SS-316L) chambers.  Can anyone please tell me what you see in these pictures from your perspective?

 

 

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