Tuesday, September 30, 2008

[MW:1176] RE: 1175] TKY Joints definition and use of 6GR Welders

In my opinion "NO" , considering that these joints (Access platform, ladders) welded with Fillet only, and not with either CJP or PJP.
 
what is type of connection as defined in para 4.26, 4.27, 4.28 of AWS D1.1, is it CJP, PJP or fillet?. In this regard your designer is handy to clarify, what criteria used for designing these accessories, essentially in my opinion no designer will use para 2.24 to calculate Punching shear, LRFD etc for ladders, access platforms. This para 2.24 is applicable only for strength welds in statistically or cyclically loaded connections.
 
If you refer commentary C4.12 (2) (d)  states "Fillet weld TKY connections can be executed by welders having even lower level of qualification.........  ''
 
I am not using D1.1 on day to day hence I may be wrong in my views expressed here, however these can't be presumed to match the strength of members joined, but shall be checked by the designer for specific applied loads in conformance with 2.24.2.3, 2.20.6, 2.23.1, 2.24.1, 2.24.2.

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of Vinod Upadhyay
Sent: Tuesday, September 30, 2008 6:35 AM
To: materials-welding@googlegroups.com
Subject: [MW:1175] TKY Joints defination and use of 6GR Welders

AWS D1.1/D1.1M :2006 para 2.24.1.5 (2) , attached, states that classification criteria of TKY joints is based on punching load cases of brace to chord connection.

Now the question is that:

The given weld connection is tubular to tubular (TKY type) but does not fall under TKY classification based on punching load cases as para 2.24.1.5.
for example secondary and miscellaneous small structures like access platforms , stairs  etc fabricated by tubulars/ pipes.
Do we need to treat these tubular to tubular joints as TKY joints and strictly welded by 6GR qualified welders??


--
Thanks

Vinod R Upadhyay
SMOE (a subsidiary of SEMBCORP MARINE)
Batam Yard, QA/QC- TOTAL Project
Mob:+62 815 1474 1550


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By - No comments:

[MW:1175] TKY Joints defination and use of 6GR Welders

AWS D1.1/D1.1M :2006 para 2.24.1.5 (2) , attached, states that classification criteria of TKY joints is based on punching load cases of brace to chord connection.

Now the question is that:

The given weld connection is tubular to tubular (TKY type) but does not fall under TKY classification based on punching load cases as para 2.24.1.5.
for example secondary and miscellaneous small structures like access platforms , stairs  etc fabricated by tubulars/ pipes.
Do we need to treat these tubular to tubular joints as TKY joints and strictly welded by 6GR qualified welders??


--
Thanks

Vinod R Upadhyay
SMOE (a subsidiary of SEMBCORP MARINE)
Batam Yard, QA/QC- TOTAL Project
Mob:+62 815 1474 1550



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[MW:1174] Re: 1150] SAW - For Single sided joint

Dear Prem,
1. Achieving FPW using single sided SAW is not possible unless you provide a backing strip, say ceramic backing strip that may be removed after welding
2. What is the dia of circ seam that you intend to weld - SAW wire dia will depend on that; typical angular offset of the wire wrt axis will be approx.3-5 degree on uphill side
3. if you have one square edge on the bevel, try to tilt the joint by 45degree so that the joint is in flat position. Alternatively give 22 degree bevel on both bevels
4. Root and Hotpass by GTAW  or SMAW root using E7010 / E7016 will be required in order to avoid burn through

trust this helps out - will require trials to establish the correct parameters and bead placement
 
Cheers



Date: Sat, 27 Sep 2008 16:59:31 +0000
From: prem_nautiyal@rediffmail.com
To: materials-welding@googlegroups.com
CC: ck@knm-group.com; R.Bathula@ticb.com
Subject: [MW:1171] Re: 1150] SAW - For Single sided joint


  Dear Sir
We tried with various rootfaces upto 5mm and current upto 500-550A,zero gap, but no penetration achieved in root pass. Also we tried with various travel speeds but no uniform penetration achieved.
I feel that only ceramic backing is the solution to weld single sided joints with SAW..

Regards

Prem Nautiyal


On Mon, 22 Sep 2008 Chaitanya Purohit wrote :
>Dear Prem,
>
>To weld with just SAW from one side itself, you need to provide zero root
>gap with 5mm root face at the beveled member. Use current 550-600 Amps and
>try. I do not see any problem to get the root fusion.
>
>C. K. Purohit
>General Manager - QA/QC/NDT/R&D
>KNM Process Systems Sdn Bhd.
>HP :    +616 3376448
>Phone : +603 89460338
>Fax  : +603 89460333
>
>
>-----Original Message-----
> From: "Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com>
>To: <materials-welding@googlegroups.com>
>Date: Mon, 22 Sep 2008 20:06:19 +0530
>Subject: [MW:1158] RE: 1150] SAW - For Single sided joint
>
>
>Why  not GTAW+SAW?  Full SAW may not give you full penetration + defect free
>in UT
>-----Original Message-----
> From: materials-welding@googlegroups.com
>[mailto:materials-welding@googlegroups.com]On Behalf Of PREM SHANKARDUTT
>NAUTIYAL
>Sent: Saturday, September 20, 2008 4:36 PM
>To: materials-welding@googlegroups.com
>Subject: [MW:1150] SAW - For Single sided joint
>
>
>
>Dear Friends
>
>We are trying to establish SAW for single sided joint. The base metal is
>SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but
>joint with included angle of 45degree ( one member is vertical and there is
>bevel on other member).The final NDT is UT.
>Presently we are welding this joint with TIG+SMAW.The joint is circular
>hence ideal for SAW.
>Now we want to try to weld this single sided joint completely with SAW. This
>is for productivity improvement.
>Is it possible to weld this joint having no access from other side with SAW
>completely ?
>Can we keep zero gap, zero rootface, and achieve full penetration joint with
>SAW??
>If yes what should be the parameters, wire dia., etc.
>We dont want to use any ceramic backing.
>Can anyone suggest how to weld this joint completely with SAW.
>This is a development activity. Please share your experience...
>
>Regards
>
>Prem Nautiyal
>
>PREM S NAUTIYAL
>CELL : 9820313278
>
>
>
>
>***DISCLAIMER NOTICE ***
>"This e-mail and any files transmitted with it is confidential and is intended only for the use of the recepient(s) named above.
>If you are not the intended recipient, any review, retransmission, dissemination, distribution, printing, copying or use the information contained in this message or any part thereof in other manner is strictly prohibited.
>If you receive this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail and any of its attachments.
>Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."
>
>>

PREM S NAUTIYAL
CELL : 9820313278

</Table
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By - No comments:

Monday, September 29, 2008

[MW:1173] Re: 1150] SAW - For Single sided joint

IF code and specification permit try Cellulose Electrode for root and
followed by SAW.

I feel single bevel 45 degree V s not recommended groove for SAW. End
result of such groove may endup in having side wall lack of fusion.

Suggest to go ahead with J type groove atleast.

Regards

Paresh


On 9/22/08, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
> Why not GTAW+SAW? Full SAW may not give you full penetration + defect free
> in UT
>
> -----Original Message-----
> From: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com]On Behalf Of PREM SHANKARDUTT
> NAUTIYAL
> Sent: Saturday, September 20, 2008 4:36 PM
> To: materials-welding@googlegroups.com
> Subject: [MW:1150] SAW - For Single sided joint
>
>
>
>
> Dear Friends
>
> We are trying to establish SAW for single sided joint. The base metal is
> SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but
> joint with included angle of 45degree ( one member is vertical and there is
> bevel on other member).The final NDT is UT.
> Presently we are welding this joint with TIG+SMAW.The joint is circular
> hence ideal for SAW.
> Now we want to try to weld this single sided joint completely with SAW. This
> is for productivity improvement.
> Is it possible to weld this joint having no access from other side with SAW
> completely ?
> Can we keep zero gap, zero rootface, and achieve full penetration joint with
> SAW??
> If yes what should be the parameters, wire dia., etc.
> We dont want to use any ceramic backing.
> Can anyone suggest how to weld this joint completely with SAW.
> This is a development activity. Please share your experience...
>
> Regards
>
> Prem Nautiyal
>
>
> PREM S NAUTIYAL
> CELL : 9820313278
>
>
> <http://adworks.rediff.com/cgi-bin/AdWorks/click.cgi/www.rediff.com/signature-home.htm/1050715198@Middle5/2401775_2394076/2397136/1?PARTNER=3&OAS_QUERY=null>
> Ebay
>
>
>
>
>
> >
>

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By - No comments:

[MW:1172] Welder Qualification

yes, provided all other  variables are same per QW353
-----Original Message-----
From: SENTHILKUMAR SWAMINATHAN [mailto:skumarswami@yahoo.co.in]
Sent: Sunday, September 28, 2008 8:23 AM
To: Engineering
Subject: Welder Qualification

Rediff Shopping
Hi,
I have qualified a welder as per ASME Sec.IX.
Matl: ASTM A 106 Gr B pipes,
Dia 6"X13mm in
5G position.
Process: SMAW
Same welder can qualify to weld Dia 4"X7.2mm, filling and capping only by SMAW. All other condition are same. Give the reference also in ASME IX.
 
Regards,
S.Senthilkumar



 

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By - No comments:

Sunday, September 28, 2008

[MW:1170] Welder Qualification

Hi,
I have qualified a welder as per ASME Sec.IX.
Matl: ASTM A 106 Gr B pipes,
Dia 6"X13mm in
5G position.
Process: SMAW
Same welder can qualify to weld Dia 4"X7.2mm, filling and capping only by SMAW. All other condition are same. Give the reference also in ASME IX.
 
Regards,
S.Senthilkumar

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By - No comments:

Saturday, September 27, 2008

[MW:1171] Re: 1150] SAW - For Single sided joint

  Dear Sir
We tried with various rootfaces upto 5mm and current upto 500-550A,zero gap, but no penetration achieved in root pass. Also we tried with various travel speeds but no uniform penetration achieved.
I feel that only ceramic backing is the solution to weld single sided joints with SAW..

Regards

Prem Nautiyal


On Mon, 22 Sep 2008 Chaitanya Purohit wrote :
>Dear Prem,
>
>To weld with just SAW from one side itself, you need to provide zero root
>gap with 5mm root face at the beveled member. Use current 550-600 Amps and
>try. I do not see any problem to get the root fusion.
>
>C. K. Purohit
>General Manager - QA/QC/NDT/R&D
>KNM Process Systems Sdn Bhd.
>HP :    +616 3376448
>Phone : +603 89460338
>Fax  : +603 89460333
>
>
>-----Original Message-----
> From: "Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com>
>To: <materials-welding@googlegroups.com>
>Date: Mon, 22 Sep 2008 20:06:19 +0530
>Subject: [MW:1158] RE: 1150] SAW - For Single sided joint
>
>
>Why  not GTAW+SAW?  Full SAW may not give you full penetration + defect free
>in UT
>-----Original Message-----
> From: materials-welding@googlegroups.com
>[mailto:materials-welding@googlegroups.com]On Behalf Of PREM SHANKARDUTT
>NAUTIYAL
>Sent: Saturday, September 20, 2008 4:36 PM
>To: materials-welding@googlegroups.com
>Subject: [MW:1150] SAW - For Single sided joint
>
>
>
>Dear Friends
>
>We are trying to establish SAW for single sided joint. The base metal is
>SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but
>joint with included angle of 45degree ( one member is vertical and there is
>bevel on other member).The final NDT is UT.
>Presently we are welding this joint with TIG+SMAW.The joint is circular
>hence ideal for SAW.
>Now we want to try to weld this single sided joint completely with SAW. This
>is for productivity improvement.
>Is it possible to weld this joint having no access from other side with SAW
>completely ?
>Can we keep zero gap, zero rootface, and achieve full penetration joint with
>SAW??
>If yes what should be the parameters, wire dia., etc.
>We dont want to use any ceramic backing.
>Can anyone suggest how to weld this joint completely with SAW.
>This is a development activity. Please share your experience...
>
>Regards
>
>Prem Nautiyal
>
>PREM S NAUTIYAL
>CELL : 9820313278
>
>
>
>
>***DISCLAIMER NOTICE ***
>"This e-mail and any files transmitted with it is confidential and is intended only for the use of the recepient(s) named above.
>If you are not the intended recipient, any review, retransmission, dissemination, distribution, printing, copying or use the information contained in this message or any part thereof in other manner is strictly prohibited.
>If you receive this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail and any of its attachments.
>Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."
>
>>

PREM S NAUTIYAL
CELL : 9820313278

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By - No comments:

Friday, September 26, 2008

[MW:1169] Re: Presence of laminations in seamless pipes and fittings

Rediff Shopping
We are use to test (After re-beveling or cutting) before welding. The reason what I know, you may have some acceptable indication before cutting in that location. That indication may become open to surface.
Ref. Below Procedure:

This Procedure describes the Operations which will be used to carry-out repairs to damaged

bevel ends on materials supplied for the Slug Catcher Works associated with the Offshore

Gas Gathering System (OGGS) Project.

The methods described in this Document are based upon the requirements of the

Specifications and proven methods of achieving the required results. It must be

appreciated, however, that these methods may be subject to revision or modification

depending upon conditions and circumstances actually encountered.

Bevel End Repairs

Repairs to damaged bevels will be carried-out as detailed below:

i) Minor damage to bevels will be repaired by grinding and/or filing. After affecting such a

repair, the bevel will be checked visually by the QA/QC Representative.

ii) Major damage to pipe ends, which renders the end preparation unfit for production

welding, will be repaired by initial grinding, followed by repair welding in accordance with

the attached approved WPS (WPS P -1027a, Rev. 0). The welded repair area will be redressed

by grinding. After final grinding, the repaired bevel shall be checked visually and

by Magnetic Particle Inspection (MPI) in accordance with the approved procedure by

the QA/QC Representative for this operation. The results of the MPI shall be recorded

on Form QR-035.

iii) Contractor may also opt to utilize a purpose-built End Facing Machine appropriate for

bevel repairs on straight lengths of pipe. Once the Machine has 'faced' the desired

bevel, the new bevel shall be checked visually and by Magnetic Particle Inspection (MPI)

by the QA/QC Representative in accordance with the approved procedure for this

operation, and the results recorded on Form QR-035.
 
S.Senthilkumar


--- On Sat, 20/9/08, Sankepalli R.S.Reddy <sankepalli.rsreddy@gmail.com> wrote:
From: Sankepalli R.S.Reddy <sankepalli.rsreddy@gmail.com>
Subject: [MW:1148] Presence of laminations in seamless pipes and fittings
To: materials-welding@googlegroups.com
Date: Saturday, 20 September, 2008, 8:19 PM

Dear All,
 
As per Aramco company specification, Fittings that are re-cut or re-beveled shall have the cut surface examined for laminations before welding.
 
Now my question is
 
1. What are the chances of getting laminations in seamless pipes and fittings that are manufactured from seamless pipes.
 
As per my understanding of this clause, only fittings and pipes that are fabricated from plate should be checked for laminations after cut and re bevelling.
 
Expert comments requested.
 
Thanks and regards
 
 

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Wednesday, September 24, 2008

[MW:1168] Re: API 510/570 certification Exam at Kuwait

Dear Mr Gopalan,

I too am interested in taking API exams. But its is scheduled next in
Mar-09 only. I know 4 candidates who want to appear for API exam in
Mar-2009. If some of you plan to reschedule your exams from Dec-08 to
Mar-09, then we can definitely have a Test Center in Kuwait.

Regards,
Jignesh Patel

On Mon, Sep 22, 2008 at 4:33 PM, sajeev c.g <sajeevmech@yahoo.com> wrote:
> Dear Members,
>
> If any one from this group or your friends(only those from kuwait) were
> planning to appear for API 510/570 exams to be held on Dec 3 2008, please
> reply so that we can request API to provide a center in Kuwait. If the
> attendies will be more than ten, then API will provide a exam center in
> kuwait. Presently the nearest center to Kuwait is in Baharin. Now we four
> candidates are applied for the exam. At least 10 candidates required to get
> a test center at kuwait.
>
> Please reply those from Kuwait.
>
> Thanks and regards
>
> Sajeev Gopalan
> I&C team
> KOC
> Kuwait
> Mobile:97364100
> 3716215(Res)
> 3861715(off)
>
>
> >
>

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By - No comments:

The welding consequences of replacing austenitic with duplex SS

<<capture3.bmp>> <<capture4.bmp>>

Source: Welding news 3: 2008 (A Polarit)

By - No comments:

The welding consequences of replacing austenitic with duplex SS

<<capture1.bmp>> <<capture2.bmp>>

Source: Welding news 3: 2008 (A Polarit)

By - No comments:

[MW:1167] Spatter due to using a Welding procedure for 304 when changing to 321

ole0.bmp

Source: Welding news 3: 2008 (A Polarit)


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[MW:1166] Slag inclusions in FCAW

ole0.bmp

Source: Welding news 3: 2008 (A Polarit)


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[MW:1165] Solidification cracking in SAW

ole0.bmp

Source: Welding news 3: 2008 (AP)


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By - No comments:

Tuesday, September 23, 2008

[MW:1164] Re: 1150] SAW - For Single sided joint

using ceramic backing strips may be helpful in this case.

On Mon, Sep 22, 2008 at 9:36 PM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
Why  not GTAW+SAW?  Full SAW may not give you full penetration + defect free in UT
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Saturday, September 20, 2008 4:36 PM
To: materials-welding@googlegroups.com
Subject: [MW:1150] SAW - For Single sided joint


Dear Friends

We are trying to establish SAW for single sided joint. The base metal is SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but joint with included angle of 45degree ( one member is vertical and there is bevel on other member).The final NDT is UT.
Presently we are welding this joint with TIG+SMAW.The joint is circular hence ideal for SAW.
Now we want to try to weld this single sided joint completely with SAW. This is for productivity improvement.
Is it possible to weld this joint having no access from other side with SAW completely ?
Can we keep zero gap, zero rootface, and achieve full penetration joint with SAW??
If yes what should be the parameters, wire dia., etc.
We dont want to use any ceramic backing.
Can anyone suggest how to weld this joint completely with SAW.
This is a development activity. Please share your experience...

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

Ebay








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By - No comments:

Monday, September 22, 2008

[MW:1160] Reducer


Dear Lukas,

I am afraid no one is able to understand the arrangement you are talking about. May be a hand sketch could help.

Secondly, assuming, you are talking about a multiple connection on a header pipe. And all connections are like a cross tee connection. But as it looks you are using a plate fab. reducer to replace the conc. red. Definitely you have to consult your stress engineer if you are replacing with a diff. thickness item being a steam line.

And if standard(bought out item) cross tee is not used and if you are going to use a reinforced stub-in/out connection, it is not 100% in acc. with B31.1 or 31.3 because it is a little complicated branch connection and the final verfication has to be in acc. with ASME IX as the branching is in opp. sides.

With regards,
Kannan



<Nialel.Lukas@lglgold.com>
Sent by: materials-welding@googlegroups.com

18/09/2008 02:49

Please respond to
materials-welding@googlegroups.com
To
<materials-welding@googlegroups.com>
cc
Subject
[MW:1135] Reducer





Hi
 
Can anyone advise if it is possible to use a 250 x 150 eccentric reducer with wall thickness of 11mm in place of a 250 x 150 concentric reducer, BW A234-WPB, SCH STD on CS1 Pipe ASTM 106, on a geothermal steam branch? From a well head, the branch of DN150 feeds DN250 to a 250 x 200 Straight Tee BW234-WPB, SCH STD as a junction with another DN250 –DN150 line to a well head and the DN250 Steam header feeding DN300 line eventually. Is it possible to use this eccentric reducer as per ASME IX and B31.1 Welding Code?
 
You explanation or suggestion will be highly appreciated.
 
N.Lukas
Meachnical Engineering - Piping --~--~---------~--~----~------------~-------~--~----~
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By - No comments:

[MW:1163] Re: SAW filler wire parameters

 
We have used 650A,34V,450mm/min Travel speed.
Result: slag removal little difficult, interbead LOF..

Please advise experts the correct welding parameters ???

On Mon, 22 Sep 2008 Muhammed Ibrahim wrote :
>450-550 Amp, 30-32 V, 50cm per minute travel speed.
>
>
>
>
>2008/9/19 PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com>
>
> >
> > Dear Friends
> >
> > We are presently trying to use a local make 4.8mm dia SAW filler wire
> > (EM12K)in place of 3.15mm dia.
> > Can anyone tell us the correct welding parameters like:
> > current, voltage, travel speed,etc for 4.8mm dia wire..
> > The base metal is SA516Gr.70, the thickness is 70mm. The joint is single
> > bevel groove joint with no access from other side. Presently we weld first 2
> > passes with TIG, Then 2 passes of SMAW and then subsequent passes with
> > SAW-3.15mm dia. Now we want to use 5.0mm dia SAW wire. So what should be the
> > welding parameters ? We have tried various parameters for SAW(4.8mm dia
> > wire) but failed to get good weld finish /UT. We have a 1200A Lincoln Power
> > source.
> > The joint calls for UT.
> >
> > Regards
> >
> > Prem Nautiyal
> > PREM S NAUTIYAL
> > CELL : 9820313278
> >
> >  [image: Ebay]<http://adworks.rediff.com/cgi-bin/AdWorks/click.cgi/www.rediff.com/signature-home.htm/1050715198@Middle5/2401775_2394076/2397136/1?PARTNER=3&OAS_QUERY=null>
> > >
> >
>
>
>--
>Thanks & Regards
>Muhammed Ibrahim PK
>
>>

PREM S NAUTIYAL
CELL : 9820313278

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By - No comments:

[MW:1162] Re: 1150] SAW - For Single sided joint

GTAW is a slow process and we want productivity as the jobs are repetitive. Also the joint is about 2 metres in dia. and about 12 metres of weld length in one job. We have 150 such jobs to manufacture. Hence we are thinking of direct SAW right from the root pass.

Any suggestions on Direct SAW for single sided weld joint are welcome !!!

Regards

Prem Nautiyal 


On Mon, 22 Sep 2008 Bathula Raghuram(Mumbai - PIPING) wrote :
>Why  not GTAW+SAW?  Full SAW may not give you full penetration + defect free in UT
>
>-----Original Message-----
> From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of PREM SHANKARDUTT NAUTIYAL
>Sent: Saturday, September 20, 2008 4:36 PM
>To: materials-welding@googlegroups.com
>Subject: [MW:1150] SAW - For Single sided joint
>
>
>
>
>Dear Friends
>
>We are trying to establish SAW for single sided joint. The base metal is SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but joint with included angle of 45degree ( one member is vertical and there is bevel on other member).The final NDT is UT.
>Presently we are welding this joint with TIG+SMAW.The joint is circular hence ideal for SAW.
>Now we want to try to weld this single sided joint completely with SAW. This is for productivity improvement.
>Is it possible to weld this joint having no access from other side with SAW completely ?
>Can we keep zero gap, zero rootface, and achieve full penetration joint with SAW??
>If yes what should be the parameters, wire dia., etc.
>We dont want to use any ceramic backing.
>Can anyone suggest how to weld this joint completely with SAW.
>This is a development activity. Please share your experience...
>
>Regards
>
>Prem Nautiyal
>
>
>PREM S NAUTIYAL
>CELL : 9820313278
>
>
>  <http://adworks.rediff.com/cgi-bin/AdWorks/click.cgi/www.rediff.com/signature-home.htm/1050715198@Middle5/2401775_2394076/2397136/1?PARTNER=3&OAS_QUERY=null> Ebay
>
>
>
>
>
>>

PREM S NAUTIYAL
CELL : 9820313278

Ebay
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To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
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By - No comments:

[MW:1161] Re: 1150] SAW - For Single sided joint

Dear Prem,
 
To weld with just SAW from one side itself, you need to provide zero root gap with 5mm root face at the beveled member. Use current 550-600 Amps and try. I do not see any problem to get the root fusion.
 
C. K. Purohit
General Manager - QA/QC/NDT/R&D
KNM Process Systems Sdn Bhd.
HP :    +616 3376448
Phone : +603 89460338
Fax   : +603 89460333

-----Original Message-----
From: "Bathula Raghuram \(Mumbai - PIPING\)" <R.Bathula@ticb.com>
To: <materials-welding@googlegroups.com>
Date: Mon, 22 Sep 2008 20:06:19 +0530
Subject: [MW:1158] RE: 1150] SAW - For Single sided joint

Why  not GTAW+SAW?  Full SAW may not give you full penetration + defect free in UT
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Saturday, September 20, 2008 4:36 PM
To: materials-welding@googlegroups.com
Subject: [MW:1150] SAW - For Single sided joint


Dear Friends

We are trying to establish SAW for single sided joint. The base metal is SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but joint with included angle of 45degree ( one member is vertical and there is bevel on other member).The final NDT is UT.
Presently we are welding this joint with TIG+SMAW.The joint is circular hence ideal for SAW.
Now we want to try to weld this single sided joint completely with SAW. This is for productivity improvement.
Is it possible to weld this joint having no access from other side with SAW completely ?
Can we keep zero gap, zero rootface, and achieve full penetration joint with SAW??
If yes what should be the parameters, wire dia., etc.
We dont want to use any ceramic backing.
Can anyone suggest how to weld this joint completely with SAW.
This is a development activity. Please share your experience...

Regards

Prem Nautiyal
PREM S NAUTIYAL
CELL : 9820313278

Ebay



***DISCLAIMER NOTICE ***
"This e-mail and any files transmitted with it is confidential and is intended only for the use of the recepient(s) named above.
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If you receive this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail and any of its attachments.
Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."
By - No comments:

[MW:1159] Re: FCAW --- UT / RT ???

Ebay
For your question answer is yes. Add CKP´s comments.

Regards,
S.Senthilkumar

--- On Mon, 22/9/08, Chaitanya Purohit <ck@knm-group.com> wrote:
From: Chaitanya Purohit <ck@knm-group.com>
Subject: [MW:1156] Re: FCAW --- UT / RT ???
To: materials-welding@googlegroups.com, "greetings" <senthilthandesh@gmail.com>
Date: Monday, 22 September, 2008, 7:09 PM

Dear Friend, FCAW is prone to these deffects if you consumable is not having capability to produce the sound weld. First of all the filler shall have the low hydrogen (H4 at least). If your wire spool is kept in open area it pick up the moisture and create problem of porosity.
 
Again skill of the welder is most important thing when we use FCAW. Normal SMAW welders are not comfortable with this procedure and if they weld with FCAW, most of the time LOF comes in. If you have resources (time and money), I will suggest to do welder qualification with bend test (not just RT), that will solve your problem of LOF.   

If any one have some other input .........most welcome.
 
C. K. Purohit
General Manager - QA/QC/NDT/R&D
KNM Process Systems Sdn Bhd.
HP :    +616 3376448
Phone : +603 89460338
Fax   : +603 89460333

-----Original Message-----
From: greetings <senthilthandesh@gmail.com>
To: materials-welding@googlegroups.com
Date: Mon, 22 Sep 2008 16:54:45 +0400
Subject: [MW:1155] Re: FCAW --- UT / RT ???

Check whether material required pre-heating
Make sure the process which you followed is correct (example grinding should be done after completion of single pass, etc)


On Fri, Sep 19, 2008 at 9:42 PM, PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com > wrote:
 
Dear Friends

We are presently using FCAW process(E71T-1) for welding SA516Gr.70 material in 3G and 1G. The joint calls for 100% RT and UT. The thickness is 70mm with double V.
But everytime we get repair in the weld like slag, LOF,porosities..

So my basic question is can FCAW be used to weld RT and UT joints??
If yes what is the correct procedure / precautions to be followed..

Regards

Prem Nautiyal
PREM S NAUTIYAL
CELL : 9820313278





***DISCLAIMER NOTICE ***
"This e-mail and any files transmitted with it is confidential and is intended only for the use of the recepient(s) named above.
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If you receive this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail and any of its attachments.
Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."


Ebay

Get an email ID as yourname@ymail.com or yourname@rocketmail.com. Click here. --~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
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By - No comments:

[MW:1158] RE: 1150] SAW - For Single sided joint

Why  not GTAW+SAW?  Full SAW may not give you full penetration + defect free in UT
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: Saturday, September 20, 2008 4:36 PM
To: materials-welding@googlegroups.com
Subject: [MW:1150] SAW - For Single sided joint


Dear Friends

We are trying to establish SAW for single sided joint. The base metal is SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but joint with included angle of 45degree ( one member is vertical and there is bevel on other member).The final NDT is UT.
Presently we are welding this joint with TIG+SMAW.The joint is circular hence ideal for SAW.
Now we want to try to weld this single sided joint completely with SAW. This is for productivity improvement.
Is it possible to weld this joint having no access from other side with SAW completely ?
Can we keep zero gap, zero rootface, and achieve full penetration joint with SAW??
If yes what should be the parameters, wire dia., etc.
We dont want to use any ceramic backing.
Can anyone suggest how to weld this joint completely with SAW.
This is a development activity. Please share your experience...

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

--~--~---------~--~----~------------~-------~--~----~
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.
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By - No comments:

[MW:1156] Re: FCAW --- UT / RT ???

Dear Friend, FCAW is prone to these deffects if you consumable is not having capability to produce the sound weld. First of all the filler shall have the low hydrogen (H4 at least). If your wire spool is kept in open area it pick up the moisture and create problem of porosity.
 
Again skill of the welder is most important thing when we use FCAW. Normal SMAW welders are not comfortable with this procedure and if they weld with FCAW, most of the time LOF comes in. If you have resources (time and money), I will suggest to do welder qualification with bend test (not just RT), that will solve your problem of LOF.   

If any one have some other input .........most welcome.
 
C. K. Purohit
General Manager - QA/QC/NDT/R&D
KNM Process Systems Sdn Bhd.
HP :    +616 3376448
Phone : +603 89460338
Fax   : +603 89460333

-----Original Message-----
From: greetings <senthilthandesh@gmail.com>
To: materials-welding@googlegroups.com
Date: Mon, 22 Sep 2008 16:54:45 +0400
Subject: [MW:1155] Re: FCAW --- UT / RT ???

Check whether material required pre-heating
Make sure the process which you followed is correct (example grinding should be done after completion of single pass, etc)


On Fri, Sep 19, 2008 at 9:42 PM, PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com > wrote:
 
Dear Friends

We are presently using FCAW process(E71T-1) for welding SA516Gr.70 material in 3G and 1G. The joint calls for 100% RT and UT. The thickness is 70mm with double V.
But everytime we get repair in the weld like slag, LOF,porosities..

So my basic question is can FCAW be used to weld RT and UT joints??
If yes what is the correct procedure / precautions to be followed..

Regards

Prem Nautiyal
PREM S NAUTIYAL
CELL : 9820313278

Ebay



***DISCLAIMER NOTICE ***
"This e-mail and any files transmitted with it is confidential and is intended only for the use of the recepient(s) named above.
If you are not the intended recipient, any review, retransmission, dissemination, distribution, printing, copying or use the information contained in this message or any part thereof in other manner is strictly prohibited.
If you receive this e-mail in error, please notify the sender immediately by return e-mail and delete the e-mail and any of its attachments.
Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."
By - No comments:

[MW:1157] API 510/570 certification Exam at Kuwait

Ebay
Dear Members,
 
If any one from this group or your friends(only those from kuwait) were planning to appear for API 510/570 exams to be held on Dec 3 2008, please reply so that we can request API to provide a center in Kuwait. If the attendies will be more than ten, then API will provide a exam center in kuwait. Presently the nearest center to Kuwait is in Baharin. Now we four candidates are applied for the exam. At least 10 candidates required to get a test center at kuwait.
 
Please reply those from Kuwait.
 
Thanks and regards
 
Sajeev Gopalan
I&C team
KOC
Kuwait
Mobile:97364100
            3716215(Res)
            3861715(off)
 


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[MW:1155] Re: FCAW --- UT / RT ???

Check whether material required pre-heating

Make sure the process which you followed is correct (example grinding should be done after completion of single pass, etc)



On Fri, Sep 19, 2008 at 9:42 PM, PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com> wrote:

 
Dear Friends

We are presently using FCAW process(E71T-1) for welding SA516Gr.70 material in 3G and 1G. The joint calls for 100% RT and UT. The thickness is 70mm with double V.
But everytime we get repair in the weld like slag, LOF,porosities..

So my basic question is can FCAW be used to weld RT and UT joints??
If yes what is the correct procedure / precautions to be followed..

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

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By - No comments:

[MW:1154] Re: FCAW --- UT / RT ???

groove angle, fcaw gas cup size, gas flow, wind protection etc. to be checked.
 


 
2008/9/19 PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com>

 
Dear Friends

We are presently using FCAW process(E71T-1) for welding SA516Gr.70 material in 3G and 1G. The joint calls for 100% RT and UT. The thickness is 70mm with double V.
But everytime we get repair in the weld like slag, LOF,porosities..

So my basic question is can FCAW be used to weld RT and UT joints??
If yes what is the correct procedure / precautions to be followed..

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

Ebay
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By - No comments:

[MW:1153] Re: SAW filler wire parameters

 
 
450-550 Amp, 30-32 V, 50cm per minute travel speed.
 


 
2008/9/19 PREM SHANKARDUTT NAUTIYAL <prem_nautiyal@rediffmail.com>

 
Dear Friends

We are presently trying to use a local make 4.8mm dia SAW filler wire (EM12K)in place of 3.15mm dia.
Can anyone tell us the correct welding parameters like:
current, voltage, travel speed,etc for 4.8mm dia wire..
The base metal is SA516Gr.70, the thickness is 70mm. The joint is single bevel groove joint with no access from other side. Presently we weld first 2 passes with TIG, Then 2 passes of SMAW and then subsequent passes with SAW-3.15mm dia. Now we want to use 5.0mm dia SAW wire. So what should be the welding parameters ? We have tried various parameters for SAW(4.8mm dia wire) but failed to get good weld finish /UT. We have a 1200A Lincoln Power source.
The joint calls for UT.

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

Ebay
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By - No comments:

Saturday, September 20, 2008

[MW:1148] Presence of laminations in seamless pipes and fittings

Dear All,
 
As per Aramco company specification, Fittings that are re-cut or re-beveled shall have the cut surface examined for laminations before welding.
 
Now my question is
 
1. What are the chances of getting laminations in seamless pipes and fittings that are manufactured from seamless pipes.
 
As per my understanding of this clause, only fittings and pipes that are fabricated from plate should be checked for laminations after cut and re bevelling.
 
Expert comments requested.
 
Thanks and regards
 
 

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[MW:1149] Useful links for Engineers

 
Dear Friends

Please make good use of the attached file "useful links for Engineers".

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

Ebay
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By - No comments:

[MW:1150] SAW - For Single sided joint

 
Dear Friends

We are trying to establish SAW for single sided joint. The base metal is SA516Gr.70. The joint is 25mm thick. The joint is a single bevel groove but joint with included angle of 45degree ( one member is vertical and there is bevel on other member).The final NDT is UT.
Presently we are welding this joint with TIG+SMAW.The joint is circular hence ideal for SAW.
Now we want to try to weld this single sided joint completely with SAW. This is for productivity improvement.
Is it possible to weld this joint having no access from other side with SAW completely ?
Can we keep zero gap, zero rootface, and achieve full penetration joint with SAW??
If yes what should be the parameters, wire dia., etc.
We dont want to use any ceramic backing.
Can anyone suggest how to weld this joint completely with SAW.
This is a development activity. Please share your experience...

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

Ebay
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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.
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By - No comments:

Friday, September 19, 2008

[MW:1151] FCAW --- UT / RT ???

 
Dear Friends

We are presently using FCAW process(E71T-1) for welding SA516Gr.70 material in 3G and 1G. The joint calls for 100% RT and UT. The thickness is 70mm with double V.
But everytime we get repair in the weld like slag, LOF,porosities..

So my basic question is can FCAW be used to weld RT and UT joints??
If yes what is the correct procedure / precautions to be followed..

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

Ebay
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[MW:1152] SAW filler wire parameters

 
Dear Friends

We are presently trying to use a local make 4.8mm dia SAW filler wire (EM12K)in place of 3.15mm dia.
Can anyone tell us the correct welding parameters like:
current, voltage, travel speed,etc for 4.8mm dia wire..
The base metal is SA516Gr.70, the thickness is 70mm. The joint is single bevel groove joint with no access from other side. Presently we weld first 2 passes with TIG, Then 2 passes of SMAW and then subsequent passes with SAW-3.15mm dia. Now we want to use 5.0mm dia SAW wire. So what should be the welding parameters ? We have tried various parameters for SAW(4.8mm dia wire) but failed to get good weld finish /UT. We have a 1200A Lincoln Power source.
The joint calls for UT.

Regards

Prem Nautiyal

PREM S NAUTIYAL
CELL : 9820313278

Ebay
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[MW:1147] welding fittings of material: St. 35.8 DIN 2448

first of all please choose appropriate subject, when posting new query, and not reply to the ongoing discussion
 
St 35.8 is normal carbon steel, you can use ER70-S2/E7018 etc.
DIN 17175 give the chem/mech composition, and DIN2448 is a dimn standard.
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of Mahtab Dewan Sharif
Sent: Thursday, September 18, 2008 9:02 AM
To: materials-welding@googlegroups.com
Subject: [MW:1139] Re: Piping Materials for Hot water Tracings.

Dear All,
 
Can you suggest any suitable welding consumable for Pipes and welding fittings of material: St. 35.8 DIN 2448 with 3.1B certificate.

 

Regards
Sharif
BOC Bangladesh Limited.

 

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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, September 18, 2008

[MW:1146] RE: 1135] Reducer

neither of these code will allow you to use this replacement (ASME Sec IX has nothing do to with it), thickness needs to be checked by design calculations, also reducer design involves flow->, pump placement etc..
 
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of Nialel.Lukas@lglgold.com
Sent: Thursday, September 18, 2008 2:49 AM
To: materials-welding@googlegroups.com
Subject: [MW:1135] Reducer

Hi

 

Can anyone advise if it is possible to use a 250 x 150 eccentric reducer with wall thickness of 11mm in place of a 250 x 150 concentric reducer, BW A234-WPB, SCH STD on CS1 Pipe ASTM 106, on a geothermal steam branch? From a well head, the branch of DN150 feeds DN250 to a 250 x 200 Straight Tee BW234-WPB, SCH STD as a junction with another DN250 –DN150 line to a well head and the DN250 Steam header feeding DN300 line eventually. Is it possible to use this eccentric reducer as per ASME IX and B31.1 Welding Code?

 

You explanation or suggestion will be highly appreciated.

 

N.Lukas

Meachnical Engineering - Piping

 

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[MW:1145] Piping Materials for Hot water Tracings.


If contract doc. doesn't say and the PMC suggests a diff material, you/your process dept. have to weight the overall cost saving solution and make the decision.
Either to use SS and no inhibitor (or) LTCS with inhibitor.

In case if you are interested to know about tomsol just search in the net for 'Tomsol MSDS' . In case if you are not aware of MSDS, it is the abbreviation of 'Material Safety Data Sheet' which gives more info on the chemical.

With regards,
Kannan


Ebay
"Bagesh Kumar" <bagesh.kmr@gmail.com>
Sent by: materials-welding@googlegroups.com

18/09/2008 13:13

Please respond to
materials-welding@googlegroups.com
To
"'Desai Jignesh \(Mumbai - Piping\)'" <J.J.Desai@ticb.com>
cc
<materials-welding@googlegroups.com>
Subject
[MW:1144] RE: 1132] Piping Materials for Hot water Tracings.





 
The Contract document does not specify any additive inhibiters in Glycol present, I believe that LTCS Materials can be used but without additive inhibitors the Acid formation will be there which will be highly risky.
 
I think Tomsol A 40 or A 65 additives used as inhibitors element in Glycol to prevent Acid formation. But still not clear about this process data.

Kumar Bagesh


From: Desai Jignesh (Mumbai - Piping) [mailto:J.J.Desai@ticb.com]
Sent: Thursday, September 18, 2008 7:43 PM
To: bagesh.kmr@gmail.com
Subject: FW: 1132] Piping Materials for Hot water Tracings.
 
Bhagesh
 
FYI, we have used LTCS and CS material for Glycol water service in Borouge II project.
Now I do not have process dat with me.
 
Regds/Jignesh --~--~---------~--~----~------------~-------~--~----~
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[MW:1144] RE: 1132] Piping Materials for Hot water Tracings.

 

The Contract document does not specify any additive inhibiters in Glycol present, I believe that LTCS Materials can be used but without additive inhibitors the Acid formation will be there which will be highly risky.

 

I think Tomsol A 40 or A 65 additives used as inhibitors element in Glycol to prevent Acid formation. But still not clear about this process data.

Kumar Bagesh

From: Desai Jignesh (Mumbai - Piping) [mailto:J.J.Desai@ticb.com]
Sent: Thursday, September 18, 2008 7:43 PM
To: bagesh.kmr@gmail.com
Subject: FW: 1132] Piping Materials for Hot water Tracings.

 

Bhagesh

 

FYI, we have used LTCS and CS material for Glycol water service in Borouge II project.

Now I do not have process dat with me.

 

Regds/Jignesh

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Bagesh Kumar
Sent: Thursday, September 18, 2008 9:08 AM
To: materials-welding@googlegroups.com
Subject: [MW:1132] Piping Materials for Hot water Tracings.

 

Dear All,
The Fluid for Industrial Heating Water is a mixture of Glycol 56 % and Water 44 %,

PMC has suggested use of Low Temperature Carbon Steel Materials,

Please Throw some light on  Proper Piping Material for the said Fluid, The Design Temperature is 130 Deg C Max and Pressure is 16 Kg/Cm2.
I have used previously SS 316, For MEG Service, Services in a petrochemical plant.

Kumar Bagesh



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[MW:35346] Cast-iron welding

Any advice for cast iron welding Sent from Yahoo Mail for iPhone

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