Sunday, June 30, 2013

[MW:18055] Invitation For One Day Refresher Course On Welding Technology- 20th July 2013 @ Mumbai

Dear friends
 
The Indian Institute of Welding, Mumbai branch cordially invites you for a One Day Refresher Course on:
 
" WELDING TECHNOLOGY "
 
On SATURDAY, 20th July 2013 (9.45 am - 5.15 pm)

At 

DON BOSCO MARITIME ACADEMY
Premier Automoblie Road,
(West side of Vidyavihar Rly. Station),
Kurla, Mumbai, India

 
 
Please Refer attached file for more details.

Thanks & Regards, 

Prem S Nautiyal
IIW - Mumbai Branch
Mobile     +91-9769316004

Re: [MW:18054] RE: 18041] metallurgy of weld joint PWHT

Dear Sandeep:

Cooling after welding is quite fast and when temp drops below Martensite Finish (Mf), it retards the transformation of austenite to some extent. SR is very similar to tempering and will help transformation of Retained Austenite (RA) and improves dimensional stability and soft spot issues.

Of course this RA comes out in Alloys with more than 0.3% Carbon content but it may happen in low carbon grades too. Read the following article, you will get the idea.

Regards
Ramin Kondori
Sr. QA/QC Engineer
SINOPEC

r.kondori@petroyada.com
+98-2123592322
+98-9132150320



On Sun, Jun 30, 2013 at 4:35 PM, sandeep monody <smv.monody@gmail.com> wrote:
Dear Ramon Kondori Sir.


Earlier I was believing  the same what you wrote in the reply.

Regarding the 3rd point u mentioned needs more clarification.,because no microstructure changes during pwht as pwht temperature is below the lower critical temperature of the metal but brittleness/hardness changes.

Please clarify your 3rd point

Sandeep.M.V

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Re: [MW:18053] RE: 18041] metallurgy of weld joint PWHT

Dear Ramon Kondori Sir.


Earlier I was believing the same what you wrote in the reply.

Regarding the 3rd point u mentioned needs more clarification.,because no microstructure changes during pwht as pwht temperature is below the lower critical temperature of the metal but brittleness/hardness changes.

Please clarify your 3rd point

Sandeep.M.V

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Re: [MW:18052] RE: 18041] metallurgy of weld joint PWHT

Dear Sandeep:

A few things happen with Stress Relief:

  1. residual stress makes every thing brittle. Metals are more tough when they are not in tension and weldments always have residual stress at levels close to yield point.
  2. SR will temper the microstructure. This tempering like quench & temper steels, have a possitive effect on toughness and reduces brittleness.
  3. SR helps residual austenite transform to ferrite. This improves toughness.
  4. SR will reduce Hydrogen level in the weldment.

Hope you get the idea...

Regards
Ramin Kondori
Sr. QA/QC Engineer
SINOPEC

r.kondori@petroyada.com
+98-2123592322
+98-9132150320



On Sun, Jun 30, 2013 at 3:24 PM, sandeep monody <smv.monody@gmail.com> wrote:
Dear sir

Thanks for your reply and I understand your explanations.

But now please clarify how does the brittleness changes after pwht?

I think no physical properties will change without change in chemical properties.


Sandeep.m.v

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[MW:18051] RE: 18041] metallurgy of weld joint PWHT

Dear sir

Thanks for your reply and I understand your explanations.

But now please clarify how does the brittleness changes after pwht?

I think no physical properties will change without change in chemical properties.


Sandeep.m.v

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Re: [MW:18047] External reinforcement for pipeline

It means the reinforcement must be greater than the pipe surface n less than 1.6 mm. If it is greater than 1.6mm u can grind it for a little circumferential length, but normally the client will not allow..n itz not a good practice too..so insist the welders to weld with a reinforcement below the specified.

Binu valiyaveedu

On 29 Jun 2013 13:01, "anhtrangnghieng" <anhtrangnghieng@gmail.com> wrote:

Dear Experts,

 

I am working to fabricate tie-in spools for pipeline and applicable standard is API 1104

As per API 1104:  7.8.2 Filler and Finish Beads : At nopoint shall the crown surface fall below the outside surface ofthe pipe, nor should it be raised above the parent metal bymore than 1/16in. (1.6 mm).

 

This means : Weld metal: the external reinforcements must not exceed the indicated dimensions ( 1.6 mm) /therefore,  if external reinforcement exceed 1.6 mm, The external reinforcement must be removed to below 1.6 mm as API 1104 required.

 

Please help me to clarify this doubt/

 

Thanks/


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Re: [MW:18047] Clarification for clause(1.3 Grades) of API 5L

Dear sir,

I can't understand your query. what is 1.3 Grades??


On Sat, Jun 29, 2013 at 12:58 PM, B R Meghwal <br.meghwal@fernas.co.in> wrote:

Dear Member(s),

Please clarify the clause of API 5L (1.3 Grades) as mentioned 'Pipe manufactured as Grade X60 or higher shall not be substituted for pipe ordered as Grade X52 or lower without purchaser approval.'

Why  purchaser approval required????

Your kind opinion with justification will be highly appreciated. 

Thanks & regards,

B.R.Meghwal
Dy. Manager-QA/QC

(ASNT Level 3,AWS-CWI & CSWIP3.1)

FERNAS Construction India Pvt. Ltd.

(A wholly owned Subsidiary of FERNAS Construction Company Inc., Turkey)

Cyber Terrace, 16th Floor, Tower – B, Building No. 5, DLF Cyber City, Phase – 3

Gurgaon – 122 002, Haryana, INDIA.

(: +91 124 4937984       (M) : +91 8860651934

Life is not about what you couldn't do so far, It's about what you still can...........

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Thanks & Regards,  

?

Joydev Dalai

Sr.Engineer  (QA/QC)

+91 7894454980
Fernas Construction India PVT.Ltd.

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Saturday, June 29, 2013

Re: [MW:18049] Reg: ASME P Numbers Clarification

Hi
Your grouping is ok. Further Refer ASME IX - QW440/QW442 for weld metal deposite i e A No. This will help you to ASME specification i e  SFA Number selection refer QW432 ( Example if material is carbon steel Refer chapter SFA5.1 Table 7 in ASME II part C matching chemical composition of feller metal)
Regards
Rakesh Kasera
From: ajmlouis <ajmlouis@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tuesday, 25 June 2013 6:52 AM
Subject: Re: [MW:18036] Reg: ASME P Numbers Clarification

ASME P-Numbers

To reduce the number of welding and brazing procedure qualifications required base metals have been assigned P-Numbers by the ASME BPVC.  Ferrous metals which have specified impact test requirements have been assigned Group Numbers within P-Numbers.
These assignments have been based on comparable base metal characteristics, such as:
  •      Composition
  •      Weldability
  •      Brazeabilit
  •      Mechanical Properties
Indiscriminant substitution of materials in a set of P-Numbers or Group Numbers may lead to problems or potentially failures.  Engineering assessment is necessary prior to a change in materials.
When a base metal with a UNS number Designation is assigned a P-Number, then a base metal listed in a different ASME material specification with the same UNS number shall be considered that P-Number.
The table below is a guide and is for instructive purposes only.  Anyone specifying materials or requirements should refer directly to the ASME Boiler and Pressure Vessel Code to specify materials, P-Numbers,  procedures, or other requirements and not rely on the table below.  The table below is only a rather incomplete and approximate summary of ASME data. 
P-Numbers
Base Metal (Typical or Example)
1
Carbon  Manganese  Steels (four Group Numbers)
2
Not Used
3
Half Molybdenum or half Chromium, half Molybdenum (three Group Numbers)
4
One and a quarter Chromium, half Molybdenum (two Group Numbers)
5A
Two and a quarter Chromium, one Molybdenum
5B
Five Chromium, half Molybdenum or nine Chromium, one Molybdenum (two Group Numbers)
5C
Chromium, Molybdenum, Vanadium (five Group Numbers)
6
Martensitic Stainless Steels (Grade 410, 415, 429) (six Group Numbers)
7
Ferritic Stainless Steels (Grade 409, 430)
8
Austenitic Stainless Steels
  •      Group 1 - Grades 304, 316, 317, 347
  •      Group 2 - Grades 309, 310
  •      Group 3 - High Manganese Grades
  •      Group 4 - High Molybdenum Grades
9A, B, C
Two to four Nickel Steels
10A, B, C, F
Various low alloy steels
10H
Duplex and Super Duplex Stainless Steel (Grades 31803, 32750)
10I
High Chromium Stainless Steel
10J
High Chromium, Molybdenum Stainless Steel
10K
High Chromium, Molybdenum, Nickel Stainless Steel
11A
Various high strength low alloy steels (six Group Numbers)
11B
Various high strength low alloy steels (ten Group Numbers)
12 to 20
Not Used
21
High Aluminum content (1000 and 3000 series)
22
Aluminum (5000 series - 5052, 5454)
23
Aluminum (6000 series – 6061, 6063)
24
Not Used
25
Aluminum (5000 series - 5083, 5086, 5456)
26 to 30
Not used
31
High Copper content
32
Brass
33
Copper Silicone
34
Copper Nickel
35
Copper Aluminum
36 to 40
Not Used
41
High Nickel content
42
Nickel, Copper - (Monel 500)
43
Nickel, Chromium, Iron - (Inconel)
44
Nickel, Molybdenum – (Hastelloy B2, C22, C276, X)
45
Nickel, Chromium
46
Nickel, Chromium, Silicone
47
Nickel, Chromium, Tungsten
47 to 50
Not Used
51, 52, 53
Titanium Alloys
61, 62
Zirconium Alloys
  
On Jun 24, 2013, at 10:12 AM, PRABU k <prabuk.engg@gmail.com> wrote:

Dear Sir,
Good Day !
Kindly Guide me whether the below mentioned ASME  P NO's   corresponds to respective Steel Types, Corrections in error if any  is most thankful.
This will help me  in selecting Proper SFA as Per ASME section II Part C.
Steel Type P NUMBER  
Carbon Steel 1
Low-Alloy Steel 3,4,5A,5B,5C,6,7,8,9A,9B,9C,11A,11B,10A,10B,10C,10F
Stainless Steel 6,7,8,10H,10I,10J,10K
Kind Regards,PRABU K
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Re: [MW:18049] External reinforcement for pipeline



Dear sir

According to the below statement, the crown shall be between 0mm -1.6 mm.which means the highest is 1.6mm. If its 1.6mm you may leave it, its not necessary to reduce the reinforcement.

Thanks
Raj

Sent from Yahoo! Mail on Android



From: anhtrangnghieng <anhtrangnghieng@gmail.com>;
To: <materials-welding@googlegroups.com>;
Subject: [MW:18045] External reinforcement for pipeline
Sent: Sat, Jun 29, 2013 6:26:45 AM


Dear Experts,

 

I am working to fabricate tie-in spools for pipeline and applicable standard is API 1104

As per API 1104:  7.8.2 Filler and Finish Beads : At nopoint shall the crown surface fall below the outside surface ofthe pipe, nor should it be raised above the parent metal bymore than 1/16in. (1.6 mm).

 

This means : Weld metal: the external reinforcements must not exceed the indicated dimensions ( 1.6 mm) /therefore,  if external reinforcement exceed 1.6 mm, The external reinforcement must be removed to below 1.6 mm as API 1104 required.

 

Please help me to clarify this doubt/

 

Thanks/


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Re: [MW:18046] Welding in 3G position

Dileep
Just consider @40Amps per mm of filler wire. My be between 110 to 130amps depends on passes which pass you are doing. Also see Manufactureer brand packet
recommandation.
 
Regards
Rakesh Kasera
From: Dileep Sankar <dileepsan.08@gmail.com>
To: materials-welding@googlegroups.com
Sent: Saturday, 29 June 2013 8:40 AM
Subject: [MW:18043] Welding in 3G position

Dear ALL,
I would like to know the best parameters to be followed for optimum result in welding an ordinary 3G joint, with E6013, 3.15mm electrode. I would like to know the preferred current (Amps) while welding both the upward and downward direction.

Please help me out.


With thanks in advance,
Dileep Sankar
dileepsan.08@gmail.com
+919787090121
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[MW:18043] Welding in 3G position

Dear ALL,
I would like to know the best parameters to be followed for optimum result in welding an ordinary 3G joint, with E6013, 3.15mm electrode. I would like to know the preferred current (Amps) while welding both the upward and downward direction.

Please help me out.


With thanks in advance,
Dileep Sankar
dileepsan.08@gmail.com
+919787090121

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[MW:18044] Clarification for clause(1.3 Grades) of API 5L

Dear Member(s),

Please clarify the clause of API 5L (1.3 Grades) as mentioned ‘Pipe manufactured as Grade X60 or higher shall not be substituted for pipe ordered as Grade X52 or lower without purchaser approval.’

Why  purchaser approval required????

Your kind opinion with justification will be highly appreciated. 

Thanks & regards,

B.R.Meghwal
Dy. Manager-QA/QC

(ASNT Level 3,AWS-CWI & CSWIP3.1)

FERNAS Construction India Pvt. Ltd.

(A wholly owned Subsidiary of FERNAS Construction Company Inc., Turkey)

Cyber Terrace, 16th Floor, Tower – B, Building No. 5, DLF Cyber City, Phase – 3

Gurgaon – 122 002, Haryana, INDIA.

(: +91 124 4937984       (M) : +91 8860651934

Life is not about what you couldn’t do so far, It’s about what you still can...........

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[MW:18045] External reinforcement for pipeline


Dear Experts,

 

I am working to fabricate tie-in spools for pipeline and applicable standard is API 1104

As per API 1104:  7.8.2 Filler and Finish Beads : At nopoint shall the crown surface fall below the outside surface ofthe pipe, nor should it be raised above the parent metal bymore than 1/16in. (1.6 mm).

 

This means : Weld metal: the external reinforcements must not exceed the indicated dimensions ( 1.6 mm) /therefore,  if external reinforcement exceed 1.6 mm, The external reinforcement must be removed to below 1.6 mm as API 1104 required.

 

Please help me to clarify this doubt/

 

Thanks/


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[MW:18042] RE: 18041] metallurgy of weld joint PWHT

Sandip,

PWHT is a broad based term which applies to all welds. For C.S and LAS the PWHT's involved in common fabrication are :-

  1. Normalizing -- the heating temperature is typically above upper critical temperature AC3
  2. Annealing - heating temperature is typically close to lower critical temperature AC1
  3. Stress relieving- most common for all fabrications in C.S and LAS. Heating temperature is well below the subcritical temperature. Look at UCS-56 for the recommended temperature ranges for various C.A and LAS.
The first two heat treatments causes changes of microstructures and while the Stress Relieving does not.
 
The intent of any is PHD  is  to  improve resistance to brittle fracture. Stress Relieving  in particular  attempts to improve notch toughness and relax residual stress.
 
Residual stresses are generated due continuous heating and cooling cycle involved during welding. It is the locked up stress within the weld/HAZ, which is usually tensile in nature. The sheer volume of the weld metal adds up to this residual stress. Lesser  the volume of weld , lower is the residual stress, example Narrow Gap bevel vs. conventional bevel. Residual stress is primarily caused by the compressive yielding that occurs around the molten zone as the material heats and expands during welding.
 
Lower heat input or control of interpass temperature or balanced welding etc all are factored to reduce residual stress in the weld.

 
 Hope the above answer clarifies your doubt, which is the very basic of any post weld heat treatment.
 
Thanks.
 
 

Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Specialist
Ontario, Canada
pgoswami@quickclic.net
pgoswami@sympatico.ca


-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sandeep monody
Sent: Friday, June 28, 2013 12:26 PM
To: materials-welding@googlegroups.com
Subject: [MW:18041] metallurgy of weld joint PWHT

Dear experts.,

Recently I came to know that PWHT does not change the micro structure of weld seam or HAZ.
Please reply me regarding metallurgy of PWHT of weld seam and HAZ in C.S and low alloy steel.

Please clarify why PWHT required for C.S and  low alloy steel.

What is residual stress?

How do we remove residual stress during PWHT?

Sandeep.M.V
QA/QC Engineer

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Friday, June 28, 2013

[MW:18041] metallurgy of weld joint PWHT

Dear experts.,

Recently I came to know that PWHT does not change the micro structure of weld seam or HAZ.
Please reply me regarding metallurgy of PWHT of weld seam and HAZ in C.S and low alloy steel.

Please clarify why PWHT required for C.S and low alloy steel.

What is residual stress?

How do we remove residual stress during PWHT?

Sandeep.M.V
QA/QC Engineer

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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/
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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.
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Thursday, June 27, 2013

[MW:18040] FW: Share FREE Asset Integrity Information

Hi Everyone
 
This is a nice journal, off course subscription based. Those who want to subscribe and have the full access may do so by contacting Mr.. Alavaro.
 
Enjoy.
 
Thanks.
 
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Specialist
Ontario, Canada
 
 


From: Tyler Alvarado [mailto:talvarado=inspectioneering.com@mail202.atl21.rsgsv.net] On Behalf Of Tyler Alvarado
Sent: Wednesday, June 26, 2013 3:59 PM
To: Pradip
Subject: Share FREE Asset Integrity Information

Share free AIM info with colleagues.
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I want to ask a favor: share our free newsletter, Inspectioneering Turnaround.

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[MW:34820] RE: 34813] Clarification in Rate of heating and cooling.

Hello,   Please see the response below.   Regards.   P. Goswami, P. Eng, IWE.   From: materials-welding@googlegroups.com <materials-weld...