Materials & Welding: October 2017

Tuesday, October 31, 2017

Re: [MW:26951] Hydro cracker Unit - Heater Radial coil welding material 347H

E347H welding on 347H grade means welding bead is already having higher carbon. Carbon, sulphur & phosphorus are responsible for solidification cracking. Try to reduce the % of these elements in welding. Use properly baked electrodes. If it's a high load containing part then need to perform PWHT also. Try using E347 with carbon content upto 0.04% or use E347L with respective filler.

On Oct 31, 2017 6:22 PM, "aslab khan" <aslab786@gmail.com> wrote:

Use the highest welding speed possible. The faster the weld is conducted, the faster the cooling rate and the less time the weld is in the hot cracking temperature range.
Try to use welding and assembly sequences and techniques that minimize restraint, reduce residual stress and produce welds of acceptable profile.

This picture shows two fillet weld terminations in the corner of a welded structure. Cracking is visible in both termination craters. Also cracking is visible along the center of both welds. The reason for this hot cracking is undesirable weld profile caused by poor welding technique. The reduction in throat thickness at the termination and for a portion of the fillet weld has allowed the stresses developed during welding to fracture the weld.

Thanks & Regards,

aslab a khan

On Tue, Oct 31, 2017 at 3:13 PM, Amul Raj <win.amul@gmail.com> wrote:
Dears Experts,

Hydro cracker Unit, Heater Radial coil welding base material 347H and Filler wire ER347H(Metrode) Size 4' x 13.49 Thickness

When we start the welding, getting crack in the weld stop and start point

Please advise me

Regards,

Amul Raj T

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Re: [MW:26950] Hydro cracker Unit - Heater Radial coil welding material 347H

Use the highest welding speed possible. The faster the weld is conducted, the faster the cooling rate and the less time the weld is in the hot cracking temperature range.

Try to use welding and assembly sequences and techniques that minimize restraint, reduce residual stress and produce welds of acceptable profile.

This picture shows two fillet weld terminations in the corner of a welded structure. Cracking is visible in both termination craters. Also cracking is visible along the center of both welds. The reason for this hot cracking is undesirable weld profile caused by poor welding technique. The reduction in throat thickness at the termination and for a portion of the fillet weld has allowed the stresses developed during welding to fracture the weld.

Thanks & Regards,

aslab a khan

On Tue, Oct 31, 2017 at 3:13 PM, Amul Raj <win.amul@gmail.com> wrote:

Dears Experts,

Hydro cracker Unit, Heater Radial coil welding base material 347H and Filler wire ER347H(Metrode) Size 4' x 13.49 Thickness

When we start the welding, getting crack in the weld stop and start point

Please advise me

Regards,

Amul Raj T

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[MW:26949] Hydro cracker Unit - Heater Radial coil welding material 347H

Dears Experts,

Hydro cracker Unit, Heater Radial coil welding base material 347H and Filler wire ER347H(Metrode) Size 4' x 13.49 Thickness

When we start the welding, getting crack in the weld stop and start point

Please advise me

Regards,

Amul Raj T

Sunday, October 29, 2017

[MW:26948] Question please and follow-up 3 questions- Can anyone advise the thought/answers please? Thanks and Best Regards

How to apply Cyclic Assessment/Analysis requirements of ASME VIII Div. 2 to a "standard" Div. 1 vessel design please?

Then follow-up 3 questions are as below for the scenario

Scenario

The supplier is offering a "standard" ASME VIII Div. 1 dryer vessel (pressure swing) with proven operating experience in excess of the 30 year design life required by the project.

The Project Vessel Specification calls for fatigue analysis according to Div. 2, when required,

It appears that Div. 2 section 5.5.2.1 c calls for a fatigue analysis if specified number of cycles is greater than 10^6, even if comparable experience can be proven (we have over 2x10^6 cycles).

Questions:

Are there any circumstances or, code exceptions, whereby proven experience can override Div.2 section 5.5.2.1.C?
What is the criteria for determining if a vessel is in cyclic service i.e. how to interpret the Div. 2 assessment criteria
If the Project Specification had not called out ASME VIII Div. 2 for assessment / analysis, what are the minimum qualification criteria that would be required? In this case would we accept "experience with comparable equipment" without further analysis? What is the standard, if any?

Saturday, October 28, 2017

[MW:26947] one WPS supported by two PQR's

Wps is data which tells the in what how we have to welding.. and it is also reffer what we are thinking to do welding we vl get that or not and thr prop also of only welding metal.....
Pqr is quality of welder.. its ability to do welding by following data given range in wps.... and one more imp DESTRUCTIVE TESTING RESULT ARE ALSO MENTIONED IN PQR..
simple welder give a welding test by using hint in wps .. and pqr is result for that in actually

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[MW:26946] heat treatment

Dear Experts,

Why force air cooling is not allowed for normalizing instead of cooling in still air.

what is the heat treatment cycle for

annealing

normalizing

stress relieving

tempering

where is the reference?

please guide

Friday, October 27, 2017

Re: [MW:26945] Alloy PMI after PWHT(piping)

Dear Friend,

It is hardly a matter of concern if PMI is being carried out before or after PWHT.
The ultimate purpose of PMI is to ensure that the material contains required chemistry or not.
There is no harm also if the same is carried out before PWHT.
It is not like RT when it is preferred after PWHT to know if there is any repair specially crack has been developed after PWHT.

Hope I answered your query.

Regards,
Rajnish

--------------------------------------------
On Thu, 10/19/17, abdulkhadar musthafa <abdulrilvan@gmail.com> wrote:

Subject: [MW:26929] Alloy PMI after PWHT(piping)
To: materials-welding@googlegroups.com
Date: Thursday, October 19, 2017, 1:49 PM

Dear Friends
Would Some one explain me regarding Alloy
materials(P11 and P5) having PWHT, but contractor side
suggest they want to PMI before PWHT. I want is
there is against code or mentioned in our codes.
waiting for reply

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QC-WELDING INSPECTOR
+91-9841879981
"The reward of deeds depends upon the intentions"
"செயல்கள் அனைத்தும்
எண்ணங்களைப் பொருத்தே
அமைகின்றன.
ஒவ்வொருவருக்கும்
அவர் எண்ணியதே
கிடைக்கிறது."

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[MW:26944] one WPS supported by two PQR's

yes its possible... what is wps... its simple a path for welder ..
suppose 20 welder doing welding using one wps so 20 pqr made different welder style ability is diff

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Thursday, October 26, 2017

[MW:26943] Re: API 570 CBT RESULT.

Pls Matt. I believe u have gotten ur result now. Did you pass? I wrote API 570 yesterday in Lagos and I got marginal result too. Pls kindly reply. Thanks and all the best.

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Re: [MW:26942] one WPS supported by two PQR's

Yes.

Thanking You,

With Regards..
Dinesh V Somwanshi
Api 570, Cswip 3.1,Bgas 2
Authorised Certified Piping, Welding, Painting Inspector.
00919881344135

On Oct 26, 2017 7:07 PM, "'raouf salhi' via Materials & Welding" <materials-welding@googlegroups.com> wrote:

Dear expert ,

We have a wps supported by two differents PQR's, it's possible according ASME IX ?

regards

SALHI Raouf
QA/QC Engineer

Tel: Morocco +212628979891
Tunisia +21621458258

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[MW:26941] one WPS supported by two PQR's

Dear expert ,

We have a wps supported by two differents PQR's, it's possible according ASME IX ?

regards

SALHI Raouf

QA/QC Engineer

Tel: Morocco +212628979891

Tunisia +21621458258

Tuesday, October 24, 2017

Re: [MW:26940] Raw material

Stainless steel is high alloy steel

On Mon, Oct 23, 2017 at 10:05 PM, Souravbohray <ermechsouravbohray@gmail.com> wrote:

What is carbon steel... alloy steel...low alloy steel and high alloy steel..
2) ss come in which category
3) different grade of ss.

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Monday, October 23, 2017

[MW:26938] Acceptance Criteria

In aws d1.1 acceptance criteria is given for all ndt and dt testing..
For further u can also go through asme sec9..
For further BIS

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[MW:26938] Raw material

What is carbon steel... alloy steel...low alloy steel and high alloy steel..
2) ss come in which category
3) different grade of ss.

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Re: [MW:26937] preheating required for T12 material

Please see below the requirement from ASME Sec.I Power Boilers.

I suppose PW-39 exemptions are applicable only for socket welds & seal welds. Hope some experts can throw more light on this subject.

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

On Monday, October 23, 2017, 8:45:39 AM GMT+4, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Please find below the requirement from Power Piping ASME B31.1

Please find below the Requirement from ASME Sec.VIII Div.I

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

On Monday, October 23, 2017, 6:28:03 AM GMT+4, Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:

If you do not go for SR, then you have to do preheat otherwise no. Pl ref PW39

On 23-Oct-2017 7:49 am, "'james gerald' via Materials & Welding" <materials-welding@googlegroups.com> wrote:

Both Chromium and Molybdenum increases hardenability(propensity to Brittleness) and hence required to be pre-heated.

Please follow below guidelines table.

Thanks & Regards
J.Gerald Jayakumar
0091-9344954677

On Sunday, October 22, 2017, 1:46:51 PM GMT+4, 'Sankaran Sp' via Materials & Welding <materials-welding@ googlegroups.com> wrote:

Dear Mr.Rameez,

T12 is alloy steel and it is having additional alloying elements with Cr,Mo combinations, hence pre- heating is advisable before welding.

Regards,
Sankaran.SP

On Tuesday 10 October 2017, 8:01:14 AM IST, Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Dear Experts,
can any one tell me pre-heating required for T12 material blow 6mm . This material in boiler water wall . Please tell me with standard and where i found this in ASME

THANKING YOU

RAMEEZ

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Re: [MW:26936] preheating required for T12 material

Please find below the requirement from Power Piping ASME B31.1

Please find below the Requirement from ASME Sec.VIII Div.I

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

On Monday, October 23, 2017, 6:28:03 AM GMT+4, Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:

If you do not go for SR, then you have to do preheat otherwise no. Pl ref PW39

On 23-Oct-2017 7:49 am, "'james gerald' via Materials & Welding" <materials-welding@googlegroups.com> wrote:

Both Chromium and Molybdenum increases hardenability(propensity to Brittleness) and hence required to be pre-heated.

Please follow below guidelines table.

Thanks & Regards
J.Gerald Jayakumar
0091-9344954677

On Sunday, October 22, 2017, 1:46:51 PM GMT+4, 'Sankaran Sp' via Materials & Welding <materials-welding@ googlegroups.com> wrote:

Dear Mr.Rameez,

T12 is alloy steel and it is having additional alloying elements with Cr,Mo combinations, hence pre- heating is advisable before welding.

Regards,
Sankaran.SP

On Tuesday 10 October 2017, 8:01:14 AM IST, Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Dear Experts,
can any one tell me pre-heating required for T12 material blow 6mm . This material in boiler water wall . Please tell me with standard and where i found this in ASME

THANKING YOU

RAMEEZ

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Friday, October 20, 2017

Re: [MW:26932] Alloy PMI after PWHT(piping)

Simple, Abdul.
If it does not pass in PMI, why would you send it for PWHT?
 
Best Regards,
Shashank C Vagal  
                                                                                
  


 On Thursday, 19 October 2017 3:29 PM, abdulkhadar musthafa <abdulrilvan@gmail.com> wrote:


Dear Friends   
Would Some one explain me  regarding Alloy materials(P11 and P5) having PWHT, but contractor side suggest they want to PMI before PWHT.
 I want is there is against code or mentioned in our codes.

waiting for reply 

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QC-WELDING INSPECTOR
+91-9841879981
"The reward of deeds depends upon the intentions"
"செயல்கள் அனைத்தும் எண்ணங்களைப் பொருத்தே அமைகின்றன. ஒவ்வொருவருக்கும் அவர் எண்ணியதே கிடைக்கிறது."


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Thursday, October 19, 2017

[MW:26931] RE: 26929] Alloy PMI after PWHT(piping)

You may read through API-RP-578, clause 4.0 and various associated sub-clauses. PWHT does not cause any major change in the alloy content of the base metals and the welds. Alloying elements may diffuse within the matrix, during PWHT, instead of being locally segregated. Thus the PMI results after PWHT could be more consistent than before PWHT. Although such changes could be very microscopic.

Design codes does not specify at what point such verification is to be done. It's clients' call.

If the PMI technique is XRF, it may be performed before or after PWHT.

If the technique is OES, then many clients prefer this before PWHT, as arcing during the OES process may leave arc stains/marks . Such marks may require grinding of buffing, not usually desirable after PWHT, due to chances of human errors.

Thanks.

P.Goswami.P.Eng, IWE.

Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of abdulkhadar musthafa
Sent: October 19, 2017 5:50 AM
To: materials-welding@googlegroups.com
Subject: [MW:26929] Alloy PMI after PWHT(piping)

Dear Friends

Would Some one explain me regarding Alloy materials(P11 and P5) having PWHT, but contractor side suggest they want to PMI before PWHT.

I want is there is against code or mentioned in our codes.

waiting for reply

ABDUL KHADAR MUSTHAFA
QC-WELDING INSPECTOR
+91-9841879981
"The reward of deeds depends upon the intentions"
"செயல்கள் அனைத்தும் எண்ணங்களைப் பொருத்தே அமைகின்றன. ஒவ்வொருவருக்கும் அவர் எண்ணியதே கிடைக்கிறது."

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[MW:26929] Alloy PMI after PWHT(piping)

Dear Friends

Would Some one explain me regarding Alloy materials(P11 and P5) having PWHT, but contractor side suggest they want to PMI before PWHT.

I want is there is against code or mentioned in our codes.

waiting for reply

Re: [MW:26929] Re: API 570 CBT RESULT.

Hi Dear ,

Its need to inform you that i was in range of 67 - 73 % results but overall got 71 % in passing.

Regards

Dinesh

Thanks & Regards

DINESH VITTHAL SOMWANSHI

BACHELOR IN MECHANICAL ENGINEER

AUTHORIZED PIPING / WELDING / NDT / PAINTING INSPECTION PERSONNEL
API 570 - Piping Inspector, AWS - CWI , CSWIP 3.1*,*BGAS Gr 2 / 3
NDT II -UT , RT , MT , PT, VT
+7 924 374 6660 Russia , 00919881344135 India ( Whatsapp )
Skype = dinesh somwanshi

असो द्यावी दया तुमच्या लागतसे पाया.

*Pray for others, sometime, You might never need to pray for yourself
again.....*

On Thu, Oct 19, 2017 at 2:55 PM, Renjith <renjithtb111@gmail.com> wrote:

Can you please tel me how many sure questions u answered correct in closed book?

On Wednesday, 18 October 2017 05:43:14 UTC+3, yashi wrote:
Ya I gave api 570 on July d same result I got. After a month I recived a mail that I got 89 marks out of 91 set for passing mark.

On Wed, 18 Oct 2017 at 5:32 AM, Rover Chu <taer...@gmail.com> wrote:
Hi Friend

I also just finish API 570 CBT exam yesterday.

and got marginal result.

is there any person who got such a result, but finally case did not pass ?

Rover

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Thanks & Regards,

Aslab Ahmad Khan

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Re: [MW:26928] Re: API 570 CBT RESULT.

Can you please tel me how many sure questions u answered correct in closed book?

On Wednesday, 18 October 2017 05:43:14 UTC+3, yashi wrote:

Ya I gave api 570 on July d same result I got. After a month I recived a mail that I got 89 marks out of 91 set for passing mark.

On Wed, 18 Oct 2017 at 5:32 AM, Rover Chu <taer...@gmail.com> wrote:
Hi Friend

I also just finish API 570 CBT exam yesterday.

and got marginal result.

is there any person who got such a result, but finally case did not pass ?

Rover

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Thanks & Regards,

Aslab Ahmad Khan

Wednesday, October 18, 2017

Re: [MW:26927] Re: API 570 CBT RESULT.

Dear,

There is 90 % of chances getting passing, The Marginal Passing means you were not reach individual subject of 70 % but aggregate 70 % near about that.

Dont be afraid will get pass.

Thanks & Regards

On Tue, Oct 17, 2017 at 11:29 PM, Rover Chu <taerover@gmail.com> wrote:

Hi Friend

I also just finish API 570 CBT exam yesterday.

and got marginal result.

is there any person who got such a result, but finally case did not pass ?

Rover

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Re: [MW:26926] Re: API 570 CBT RESULT.

Ya I gave api 570 on July d same result I got. After a month I recived a mail that I got 89 marks out of 91 set for passing mark.

On Wed, 18 Oct 2017 at 5:32 AM, Rover Chu <taerover@gmail.com> wrote:

Hi Friend

I also just finish API 570 CBT exam yesterday.

and got marginal result.

is there any person who got such a result, but finally case did not pass ?

Rover

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Thanks & Regards,

Aslab Ahmad Khan

Tuesday, October 17, 2017

Re: [MW:26925] Re: API 570 CBT RESULT.

Hi Friend

I also just finish API 570 CBT exam yesterday.

and got marginal result.

is there any person who got such a result, but finally case did not pass ?

Rover

[MW:26924] Re: 26921] Re: 26918] Weld metal thickness range QW-452.1 (b)

Dear Mr. Lakshman,

Now i can understood, thanks.

Regards,

Venkkatesh Gopalakrishnan.

On Tuesday, October 17, 2017 at 1:00:28 PM UTC+3, Lakshman Kumar wrote:

Hi,
Question 3. Is the welder qualified to deposit .864 in. of weld metal using 6010
Yes qualified (because 7018 F # is 4, and when a welder qualified in F#4 he is qualified for F#3 also, refer QW 433)
If the same welder tested for 6010 & 7018 for 2 different thickness (0.1+0.332=0.432 thick)
Then he is qualified for 0.864 thick weld metal.
Reason – 7018 F Number is 4, and 6010 F Number is 3, when a welder is tested for F Number 4 he will be qualified for F number 3 also and hence thickness range can be consider for 0.332*2 (2t) = 0.664In.

could you explain me on above statement. 6060(F# is 3) am i correct?

Thanks & Regards,
Lakshman Kumar B,
+91 9440031459

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of venkkatesh krishnan
Sent: Tuesday, October 17, 2017 12:32 PM
To: Materials & Welding <material...@googlegroups.com>
Subject: [MW:26921] Re: 26918] Weld metal thickness range QW-452.1 (b)

Dear Mr. Lakshman,

Thanks for your reply,

This is approved interpretation on ASME Sec IX No: IX-10-23 & File no: 10-1918.

For the Question no: 1, My answer was also No, but Interpretation answer is Yes i don't know why? that's what i need explanation from you and experts .

I am quite ambiguity about your reply:

Question 3. Is the welder qualified to deposit .864 in. of weld metal using 6010
Yes qualified (because 7018 F # is 4, and when a welder qualified in F#4 he is qualified for F#3 also, refer QW 433)

could you explain me on above statement. 6060(F# is 3) am i correct?

Regards,
Venkkatesh Gopalakrishnan.
On Tuesday, October 17, 2017 at 7:14:57 AM UTC+3, Lakshman Kumar wrote:
Hi,

Background: A welder tests on a NPS 6 Sch80 .432 wall coupon, depositing .100 in of 6010 and the balance of .332 using 7018.

Question 1, Using 6010, is the welder qualified to deposit .864 in Maximum of weld metal? 864 = 2T
Reply was: NO (Reason:- as per QW 452.1 b, welder is qualified for 2t only ) for the maximum weld deposited thickness.

Question 2. Using 7018 is the welder qualified to deposit .644 in weld metal. 644 = 2t
Reply was YES - agreed

Question 3. Is the welder qualified to deposit .864 in. of weld metal using 6010
Yes qualified (because 7018 F # is 4, and when a welder qualified in F#4 he is qualified for F#3 also, refer QW 433)
plus .664 in. of 7018 weld metal for a deposit of 1.528 in the same groove.
Reply was: no See QW 452.1 (b) –and you are correct that the total thickness qualified is 2t

Thanks & Regards, only
Lakshman Kumar B,
+91 9440031459

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of venkkatesh krishnan
Sent: Tuesday, October 17, 2017 12:42 AM
To: Materials & Welding <material...@googlegroups.com>
Subject: [MW:26918] Weld metal thickness range QW-452.1 (b)

Dear Gents,

Would some one explain me the below interpretation:

Background: A welder tests on a NPS 6 Sch80 .432 wall coupon, depositing .100 in of 6010 and the balance of .332 using 7018.

Question 1, Using 6010, is the welder qualified to deposit .864 in Maximum of weld metal? 864 = 2T
Reply was: yes

Question 2. Using 7018 is the welder qualified to deposit .644 in weld metal. 644 = 2t
Reply was Yes.

Question 3. Is the welder qualified to deposit .864 in. of weld metal using 6010 plus .664 in. of 7018 weld metal for a deposit of 1.528 in the same groove.
Reply was: no See QW 452.1 (b)

why a welder gets 2T coupon thickness limit (for weld metal deposited) when he only deposited the root and hot-pass using 6010. Then same welder gets only 2t weld metal thickness for the 7018?

I will be thankful for a piece of advice on this issue.

Regards,
Venkkatesh Gopalakrishna/

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