Saturday, February 28, 2009

[MW:1671] Re: voltage

Hi Nilesh,
 
The voltage before striking the arc is called open circuit voltage. and once we strike the arc, the current increases, voltage decreases and after that arc is maintained at sufficient arc gap and the voltage is termed as arc voltage.
 
Normally arc voltage during SMAW welding is kept at 24-27 volts and OCV shall not be higher. 
 
Mukesh 

 
On Sat, Feb 28, 2009 at 11:15 AM, nilesh parsekar <nilesh4878@gmail.com> wrote:
Dea All,
 
            I want to know what happens to the voltage when we strike the arc.Is it drops to zero and then gradually increases.
 
thanks

--
Nilesh Parsekar
Sr QC Co-ordinator
Exterran Belleli Energy
Fujairah - Sidem
Mobile - 0506561785
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[MW:1670] Re: Buttering on Plate

Buttering or weld built up for 55 mm thickness is not admissable nor economical. It also induces high stresses and  may result in plate edge distortion. Maintaining thickness is nother problem.
Placing a bcking strip also calls for more weld consumables.
best way is to provide a plate of  150 mm or more width, trim the  existing shell suitably and weld 2 seams instead of weld built up for 55 mm.
Please check whether API-653 suggest any minimum shell width.
T.B.N.Tagore

On Sat, Feb 28, 2009 at 4:29 AM, Radhakrishnan Venkatraman <r_venkat68@hotmail.com> wrote:
55 mm gap should not be done with buttering.here the thickness is  23.4mm.Presume that the gap is produced for vertical welding the problem shall be solved by providing backing plate of suitable thickness say 12mm or even 16mm.UT results shall be checked for crack or other weld defects
Technical details regarding backing weld shall be availed from AWS D 1.1
 
 
Regards
R.Venkataraman
Date: Sat, 28 Feb 2009 10:56:43 +0400
Subject: [MW:1663] Buttering on Plate
From: pkhormis@gmail.com
To: materials-welding@googlegroups.com


Dear All!!!
 
We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.
 
There was no PWHT as per WPS,Pre heat was only upto 40 ^0 C.
 
plate thickness is 23.4mm- 'Double 'v' groove' , ASTM 573.GR 70.

--
PRADEEP KUMAR HORMIS



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[MW:1669] Re: Buttering on Plate

Hi,
 
Your intention is Built up not buttering


 
On Sat, Feb 28, 2009 at 2:56 PM, pradeep kumar hormis <pkhormis@gmail.com> wrote:
Dear All!!!
 
We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.
 
There was no PWHT as per WPS,Pre heat was only upto 40 ^0 C.
 
plate thickness is 23.4mm- 'Double 'v' groove' , ASTM 573.GR 70.

--
PRADEEP KUMAR HORMIS



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[MW:1668] Re: Highlights for ASME sec VIII, Div2 (U2) & ASME sec VIII, Div 3 (U3) Code.

U2 and U3 are totally different
U2-Alternative rules for construction of pressure vessels
U3 -Alternative rules for construction of high pressure vessels
Two different set rules can't be compared
regards
R.venkataraman 
 
From: paresh@ramsis.com.bh
To: materials-welding@googlegroups.com
Subject: [MW:1665] Highlights for ASME sec VIII, Div2 (U2) & ASME sec VIII, Div 3 (U3) Code.
Date: Sat, 28 Feb 2009 13:45:29 +0300

Dear all,

 

Can any body give me comparison highlights for ASME  sec VIII, Div2 (U2) &  ASME  sec VIII, Div 3 (U3) Code.

 

Thanking you,

 

Regards,

Paresh Patel
 

 


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[MW:1667] Re: Buttering on Plate


As per API 650 clause 5.2.3.1 it is very much clear that plates to be joined by butt welding shall be matched accurately and retained in position during welding operation.

Also nowhere it is indicated about buttering or any other means to adjust such dimensional deviation which is beyond qualified WPS.

Only alternative is to replace shell plate /add one more such shell plate which will not violate Tee joint distance as per code.

Bharat B. Gole

 





Date: Sat, 28 Feb 2009 10:56:43 +0400
Subject: [MW:1663] Buttering on Plate
From: pkhormis@gmail.com
To: materials-welding@googlegroups.com

Dear All!!!
 
We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.
 
There was no PWHT as per WPS,Pre heat was only upto 40 ^0 C.
 
plate thickness is 23.4mm- 'Double 'v' groove' , ASTM 573.GR 70.

--
PRADEEP KUMAR HORMIS






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[MW:1686] knuckle joint

Dear All,
have a good day.
please can any one explain about knuckle joint.
if possible please attach sketch
thanks with regards,
m javed

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[MW:1665] Highlights for ASME sec VIII, Div2 (U2) & ASME sec VIII, Div 3 (U3) Code.

Dear all,

 

Can any body give me comparison highlights for ASME  sec VIII, Div2 (U2) &  ASME  sec VIII, Div 3 (U3) Code.

 

Thanking you,

 

Regards,

Paresh Patel
 

 


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[MW:1666] Re: Buttering on Plate

55 mm gap should not be done with buttering.here the thickness is  23.4mm.Presume that the gap is produced for vertical welding the problem shall be solved by providing backing plate of suitable thickness say 12mm or even 16mm.UT results shall be checked for crack or other weld defects
Technical details regarding backing weld shall be availed from AWS D 1.1
 
 
Regards
R.Venkataraman
Date: Sat, 28 Feb 2009 10:56:43 +0400
Subject: [MW:1663] Buttering on Plate
From: pkhormis@gmail.com
To: materials-welding@googlegroups.com

Dear All!!!
 
We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.
 
There was no PWHT as per WPS,Pre heat was only upto 40 ^0 C.
 
plate thickness is 23.4mm- 'Double 'v' groove' , ASTM 573.GR 70.

--
PRADEEP KUMAR HORMIS




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[MW:1663] Buttering on Plate

Dear All!!!
 
We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.
 
There was no PWHT as per WPS,Pre heat was only upto 40 ^0 C.
 
plate thickness is 23.4mm- 'Double 'v' groove' , ASTM 573.GR 70.

--
PRADEEP KUMAR HORMIS




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[MW:1664] voltage

Dea All,
 
            I want to know what happens to the voltage when we strike the arc.Is it drops to zero and then gradually increases.
 
thanks

--
Nilesh Parsekar
Sr QC Co-ordinator
Exterran Belleli Energy
Fujairah - Sidem
Mobile - 0506561785

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[MW:1662] Re :[MW:1660] Re: Nominal Thickness

the nominal thickness of the pipe is the thickness ordered by client or design thickness on which the tolerances as per api 5l is applied tolerance are different for different nominal thickness as per new api 5l
 Dinesh verma
On Fri, 27 Feb 2009 22:04:19 +0530 materials-welding@googlegroups.com wrote
Hi Mr. Babu,
 
Nrmally Nominal thickness is the thickness which we can take w.r.t schedule wheras the actual thickness can be +/- 12.5% of the nominal thickness.
 
Mukesh
Lurgi

On Sat, Feb 14, 2009 at 9:49 PM, babu k wrote:


Hi,
 
Let me introduce my self, I am Babu Working in Singapore.
 
I would like to '' What is the Physical Meaning of Nominal thickness''  which is referred in all API codes and How it is differ from the Actual thickness,
 
Thanks & Regards,
 
K.Babu
 











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Friday, February 27, 2009

[MW:1660] Re: Nominal Thickness

Hi Mr. Babu,
 
Nrmally Nominal thickness is the thickness which we can take w.r.t schedule wheras the actual thickness can be +/- 12.5% of the nominal thickness.
 
Mukesh
Lurgi
On Sat, Feb 14, 2009 at 9:49 PM, babu k <kbabupsg@gmail.com> wrote:
Hi,
 
Let me introduce my self, I am Babu Working in Singapore.
 
I would like to '' What is the Physical Meaning of Nominal thickness''  which is referred in all API codes and How it is differ from the Actual thickness,
 
Thanks & Regards,
 
K.Babu

 




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[MW:1661] Re: FW: Essential variable as per AWS D 1.1

Hi,
 
When u qualify a welder through the WPS, you should follow the WPS grrove design as per D1.1(See 4.18.3) ;
 
otherwise follow the configuration given in D1.1  ;
 
Thanks;
 
K.Babu
 
Welding Engineer
 
Singapore
 
 


 
On Wed, Feb 25, 2009 at 4:09 PM, Radhakrishnan Venkatraman <r_venkat68@hotmail.com> wrote:

 
From: r_venkat68@hotmail.com
To: materials-welding@googlegroups.com
Subject: Essential variable as per AWS D 1.1
Date: Tue, 24 Feb 2009 16:54:42 +0000

My dept was having one PQR qualified as per AWS D1.1 with double V Groove weld.
When we try to qulify our welders for a specific project,where in the requirement is for single v groove weld.
We have Conducted the test with 16mm plate (Single V preparation)
The third party qualified the welders.Is this ok
 
Because as per AWS D 1.1 groove configuration is an essential variable
 
Is any one clarify this
 
Regards
R.Venkataraman  

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Thursday, February 26, 2009

[MW:1659] Re: A333 Material for impact test requirement

First of all, let me clarify that A333 material is intended for low
temperature service only. So it is unlikely that the material is not impact
tested except for grade-11

ASTM A333 calls for impact testing (except grade-11) as per the material
standard itself when the thickness exceeds 3 mm. (Refer Para-8 and
Table-5).

So far as the impact testing of material (as per design standard) is
concerned, I feel it is very well explained in Para 323.2.2(particularly
sub para a) and Table 323.2.2. Other/subsequent para's are also elaborative
for the exact requirement for various materials. Also, refer the Fig.
323.2.2A for other materials.

I hope this has clarified. As a matter of fact, I could not follow your
exact question. If you have any particular doubt, pl. specify otherwise, it
seems to be a hypothetical question.

Best regards,

Prasad


"Faigal Fernando
Agbanawag"
<faigal.agbanawag To
@czfp.com> <materials-welding@googlegroups.com
Sent by: >
materials-welding cc
@googlegroups.com
Subject
[MW:1655] A333 Material for impact
26/02/09 04:06 PM test requirement


Please respond to
materials-welding
@googlegroups.com


Dear all,

Can anybody elaborate chapter III of B31.3 regarding the impact test
requirement of ASTM A333 where in section 323.2.2 states the limitation
concerning impact testing of a particular material. Is it mandatory for
A333 to have an impact test ?, where low temperature service is not an
issue.

Your response are highly appreciated.

Regards,

Faigal Fernando Agbanawag
Sr. Piping Engineer
Clough ZFP



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[MW:1658] Re: Difference between Full & 100 % radiography

So far as I know the Full Radiography is the term used for PV fabrication.
It is defined in ASME sec.VIII/UW-11. It is not 100% radiography as some of
the joints are excluded from the requirement of RT (for e.g. nozzle butt
welds with DN 250 and smaller that are thinner than 29 mm)

On the other hand, 100% Radiography is the term used in piping fabrication.
And it implies 100% radiography of all the butt joints.

But some times Client may ask 100% RT in PV also.

Hope it clarifies.

Best regards,

Prasad



Sudipto_Banerjee@
fwuk.fwc.com
Sent by: To
materials-welding materials-welding@googlegroups.com
@googlegroups.com cc

Subject
26/02/09 04:41 PM [MW:1654] Difference between Full &
100 % radiography

Please respond to
materials-welding
@googlegroups.com

I want to know the Difference between Full & 100 % radiography and the
code/cases that is being spelt out.

Thanks.


Best Regards,
Sudipto Banerjee


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[MW:1657] Re: A333 Material for impact test requirement

Dear Faigal,

Yes, Impact test is mandatory requirement as per material specification of SA 333 Gr -  1,3,4, 6,7,9 & 10, even it is not designed for low temperature services.

Regards,

Sridhar Doddapaneni

On Thu, Feb 26, 2009 at 5:36 PM, Faigal Fernando Agbanawag <faigal.agbanawag@czfp.com> wrote:

Dear all,

 

Can anybody elaborate chapter III of B31.3 regarding the impact test requirement of ASTM A333 where in section 323.2.2 states the limitation concerning impact testing  of a particular material. Is it mandatory for A333 to have an impact test ?,  where low temperature service is not an issue.

 

Your response are highly appreciated.

 

Regards,

 

Faigal Fernando Agbanawag
Sr. Piping Engineer
Clough ZFP

Shopping
T +966 3 8828818 Ext: 241
F +966 3 8828622
M +966 (0) 507780576


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[MW:1656] Re: A333 Material for impact test requirement

Dear Sir,

I'm not familiar with the B31.3 but I know that all material according
to ASTM A333 have requirements for Impact testing for material
certification, except for Grade 11, see chapter 8 of ASTM A333 . This
means that all other material grades must have impact values mentioned
on their material certificate. Depending on the materials grade also
the test temperature is laid down in the ASTM A333, see table 5 of
this specification. The minimum requirements for each grade are
mentioned in table 4. Some grades even requires measuring lateral
expansion of the impact specimens. If it concerns welded pipe also
impact values are required for the weld area.
This is completely independent of the specification B31.3

If you can specify the grade of material I can send you the
requirements for this grade.

Best Regards,

Herman Pieper

On 26 feb, 13:06, "Faigal Fernando Agbanawag"
<faigal.agbana...@czfp.com> wrote:
> Dear all,
>
> Can anybody elaborate chapter III of B31.3 regarding the impact test
> requirement of ASTM A333 where in section 323.2.2 states the limitation
> concerning impact testing  of a particular material. Is it mandatory for
> A333 to have an impact test ?,  where low temperature service is not an
> issue.
>
> Your response are highly appreciated.
>
> Regards,
> Faigal Fernando Agbanawag
> Sr. Piping Engineer
> Clough ZFP
> T+966 3 8828818 Ext: 241
> F+966 3 8828622
> M+966               (0) 507780576        
>
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By - No comments:

[MW:1654] Difference between Full & 100 % radiography

I want to know the Difference between Full & 100 % radiography and the
code/cases that is being spelt out.

Thanks.


Best Regards,
Sudipto Banerjee


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By - No comments:

[MW:1655] A333 Material for impact test requirement

Dear all,

 

Can anybody elaborate chapter III of B31.3 regarding the impact test requirement of ASTM A333 where in section 323.2.2 states the limitation concerning impact testing  of a particular material. Is it mandatory for A333 to have an impact test ?,  where low temperature service is not an issue.

 

Your response are highly appreciated.

 

Regards,

 

Faigal Fernando Agbanawag
Sr. Piping Engineer
Clough ZFP

T +966 3 8828818 Ext: 241
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By - No comments:

[MW:1653] Re: WPS parameter

 change in I & E is a non essential variable for GMAW process( QW-406.8) if you mention the  current range on the WPS with higher difference than what you have qualified for the PQR, then you no need to qualify for the new procedure, and can convince your client as the actual Amp. is within the range specified on the WPS.
 
Regards

 
On 2/26/09, sandy kumar <sandy001987@gmail.com> wrote:
hi everone
 I have one query. If anyone have its answer then please give me at my email sandeepkumar63@rediffmail.com
I have qualified my procedure at a amperage range of 160-180. i am doing my actual weld uptp 240 A. I have MIG machine of CLOSS make in which I have to enter only require WFS and it takes other parameter automatically. For example I am doing welding at 220 A and actual Amperes which are coming in a range of 220 plus minus 20. So question is that What proof shall I give to prove this variation in current as per ASME Sec-9 to the customer as the machine is showing the set current is 220 so what proof I shall to them for acceptance of this variation.
 
Sandeep 
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[MW:1652] Re: 1638] Re: WPS from 2 PQRs

Thank you Mr. John Henning for your valuable information.
 
Regards,
Muhammed Ibrahim PK

2009/2/25 John Henning <jhenning@deltak.com>

The short answer is no.

When combining multiple PQR's to support a single WPS, you are limited to the most restrictive essential variable or supplemental essential variable found on the PQR's.  If I understand correctly, in your case you have one PQR using the GTAW process qualified on 4mm thick plate and a second PQR using the SMAW process on 10mm thick plate.  I assume only GTAW or SMAW was used either PQR and that the full thickness of base metal was welded.

Then, you can write the following WPS's:

GTAW on plate, 1.5mm to 8mm, with weld deposit thickness to 8mm

SMAW on plate, 1.5mm to 20mm, with deposit thickness to 20mm

Combined GTAW and SMAW, plate thickness qualified 1.5mm to 8mm, both GTAW and SMAW deposit to the maximum thickness of 8mm.  The base metal thickness is limited for both process as the GTAW weld can ONLY be performed on base metal to a maximum of 8mm thick.

The only exception can be found in QW-200.4 (b).  When a process is used for the root weld and is qualified on a base metal 13mm and thicker, then that PQR can be used in combination with another PQR qualified for any greater thickness to write a single WPS.  The root process is limited to 2 times the deposit thickness performed on the first PQR.

An example:  PQR 1 - Qualified on 15mm plate, root weld GTAW with deposit thickness 5mm, balance of weld SMAW (10mm)
            PQR 2 - SAW qualified on 40mm plate (back gouged and back welded) with deposit thickness 40mm
           (Assuming all other essential variables are satisfied and impacts are not required)

WPS supported by PQR 1 with GTAW root and PQR 2 SAW fill:
    Qualified base metal thickness range:  10mm to 200mm  (QW-451.1 range for SAW)
    Maximum qualified GTAW root deposit thickness:  10mm  (2t - GTAW)
    Maximum qualified SAW deposit (fill) thickness:  200mm

Reference:  Interpretations IX-81-32, IX-04-18, IX-80-NNAE


Hope this helps.

John Henning
Senior Welding Engineer


-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of VJ V
Sent: Wednesday, February 25, 2009 1:15 AM
To: Materials & Welding
Subject: [MW:1638] Re: WPS from 2 PQRs


Dear Prasad,
Let me make it clear...

QW 200.2(f) states about One WPS from several PQRs and vise versa.

Assume, I have got a PQR of GTAW of 4mm thick, and another PQR of 10mm thick SMAW.
I would like to write a WPS for 20mm thick with GTAW+SMAW as the above mentioned PQRs supporting(Assume all other variables are meeting the req.)----Is it possibe ?



Is it possibel to write a WPS of (4+10)x 2 = 28mm thick (2t range)?



As I qouted earlier, QW 200.2(f) gives an example about write a WPS for 1.5mm thick thru 32mm thick.So the PQRs may be of (1)which cover upto 1.5mm to 5mm thick for its WPS (2) which cover from 5mm to 32mm thick.

Regards


On Feb 24, 10:02 am, VJ V <veeve...@gmail.com> wrote:
> Hi everyone,
>
> I would like to know reg Sec IX,QW 200.2(f) and QW 200.4(a)
>
> 200.2(f) states " A single WPS may cover several essential variable
> changes......(eg. a single WPS may cover a thinkness range from 1.5mm
> thru 32mm if PQR exist for both 1.5 to 5mm and 5mm thru 32 mm ranges)
>
> But QW 200.4(a) states if all essential/supplementary essential
> variable according to QW 451 is meeting then ......
>
> My doubt is this: As per 200.2(f), "Base metal range" is not meeting
> the requirement of QW 451.
>
> But QW 200.4(a), states base metal thickness range, weld metal
> thickness range etc shall meet QW 451.
>
> Can anybody please clarify...
>
> Regrds


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By - No comments:

[MW:1651] WPS parameter

hi everone
 I have one query. If anyone have its answer then please give me at my email sandeepkumar63@rediffmail.com
I have qualified my procedure at a amperage range of 160-180. i am doing my actual weld uptp 240 A. I have MIG machine of CLOSS make in which I have to enter only require WFS and it takes other parameter automatically. For example I am doing welding at 220 A and actual Amperes which are coming in a range of 220 plus minus 20. So question is that What proof shall I give to prove this variation in current as per ASME Sec-9 to the customer as the machine is showing the set current is 220 so what proof I shall to them for acceptance of this variation.
 
Sandeep 

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By - No comments:

[MW:1650] RE: 1642] Re: FW: API 5L Gr B and A 106 Gr B

From a weldability perspective, both grades are weldable with similar
welding procedures, consumables and processes. Both materials are
classified as S-No 1 Group 1 materials in ASME Section IX. The
difference in the seamless and seamed nature of the two grades may have
an influence on pipe dimensions, for eg the seam welded Grade B pipes
may be expected to have Local OOR at the long seam. This will however be
of significance only for mechanised or automatic welding. Though the 5L
Grade B pipes may be impact tested as per the material specification,
the design code requirements will apply for material, weld and HAZ
impact testing (Refer B31.3 or ASME section VIII div 1 as applicable).

Rgds

Sayee

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Quality
Sent: 25 February 2009 15:32
To: materials-welding@googlegroups.com
Subject: [MW:1642] Re: FW: API 5L Gr B and A 106 Gr B


Dear all,

This is not true always. (use as an alternate to each other). Some
occasions one standard pipe can not be replaced/used in place of other,
depending upon design/ service requirement.

The common similarity between these pipes are Tensile & yield strength
property.

ASTM A 106 pipe is seamless by default (Always), whereas API 5L may be
manufactured as welded construction as well. Some specific cases,
designer specifies only seamless pipes (A 106) are acceptable, you may
not able to replace it with API 5L Gr B (welded) pipe.

A 106 need not be tested for notch toughness. Where as API 5L pipes can
be 'demanded' for notch toughness test.
At locations/conditions where materials need to be have notch toughness
& resist crack propagation, API 5L certified pipes are recommended &
preferred rather than A 106.

Regards,
Sanjeevan

----- Original Message -----
From: "rutvik dixit" <rutvikdixit@yahoo.co.in>
To: <materials-welding@googlegroups.com>
Sent: Wednesday, February 25, 2009 6:40 PM
Subject: [MW:1640] Re: FW: API 5L Gr B and A 106 Gr B


Dear Rafique,
You can use both as alternate to each other.for detail
please
refer mech,chem props,service condition in their respected API and ASTM
spec.

Regards,
Rutvik


--- On Tue, 24/2/09, rafique naik <rafiquenaik@hotmail.com> wrote:

> From: rafique naik <rafiquenaik@hotmail.com>
> Subject: [MW:1619] FW: API 5L Gr B and A 106 Gr B
> To: "welding group" <materials-welding@googlegroups.com>
> Date: Tuesday, 24 February, 2009, 11:57 PM
> Dear ALL,
>
> Please explain the difference as asked my Mick....., I am
> forwarding this mail to the group because I know this mail
> will reach to experts and they can reply in better way.
>
> Thanks and regards,
>
> Rafique
>
> From: crc1199@hotmail.com
> To: rafiquenaik@hotmail.com
> Subject: API 5L Gr B and A 106 Gr B
> Date: Tue, 24 Feb 2009 13:15:47 -0500
>
>
>
>
>
>
>
>
> Dear Rafique,
>
> Please explain me what is the difference between API 5L Gr
> B and ASTM A 106 Gr.B pipes.
>
> Regards,
>
> MICK
>
> Access your email online and on the go with Windows Live
> Hotmail. Sign up today.
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By - No comments:

[MW:1649] comparison highlights for ASME sec VIII, Div2 (U2) & ASME sec VIII, Div 3 (U3) Code.

Dear all,

 

I am not familiars with  ASME  sec VIII, Div 3 (U3) Code, I required expert inputs.

Can any body give me comparison highlights for ASME  sec VIII, Div2 (U2) &  ASME  sec VIII, Div 3 (U3) Code.

 

Thanking you,

 

Regards,

Paresh Patel
 

 


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By - No comments:

[MW:1648] Re: 1638] Re: WPS from 2 PQRs

Good Explanation by John, I would like to correct the Qualified thickness
range in the example. It should be 4.8 throgh 200 mm. (Of course, it is
minor correction and probably due to use of conservative range for multiple
standards of qualification.)

Also, I would like to add as follows:

It is very common to mix up two variables (BM thickness -T and weld thick.
t). If we separately deal with the two variables, there will be no
confusion.

I would suggest VJ to again look at your PQR's with this information. The
each of the PQR's (GTAW & SMAW) is welded with single process only or there
are multiple processes. In case of multiple processes, the t and T will be
different.

Best regards,

Prasad


"John Henning"
<jhenning@deltak.
com> To
Sent by: <materials-welding@googlegroups.com
materials-welding >
@googlegroups.com cc

Subject
25/02/09 08:41 PM [MW:1644] RE: 1638] Re: WPS from 2
PQRs

Please respond to
materials-welding
@googlegroups.com

The short answer is no.

When combining multiple PQR's to support a single WPS, you are limited to
the most restrictive essential variable or supplemental essential variable
found on the PQR's. If I understand correctly, in your case you have one
PQR using the GTAW process qualified on 4mm thick plate and a second PQR
using the SMAW process on 10mm thick plate. I assume only GTAW or SMAW was
used either PQR and that the full thickness of base metal was welded.

Then, you can write the following WPS's:

GTAW on plate, 1.5mm to 8mm, with weld deposit thickness to 8mm

SMAW on plate, 1.5mm to 20mm, with deposit thickness to 20mm

Combined GTAW and SMAW, plate thickness qualified 1.5mm to 8mm, both GTAW
and SMAW deposit to the maximum thickness of 8mm. The base metal thickness
is limited for both process as the GTAW weld can ONLY be performed on base
metal to a maximum of 8mm thick.

The only exception can be found in QW-200.4 (b). When a process is used
for the root weld and is qualified on a base metal 13mm and thicker, then
that PQR can be used in combination with another PQR qualified for any
greater thickness to write a single WPS. The root process is limited to 2
times the deposit thickness performed on the first PQR.

An example: PQR 1 - Qualified on 15mm plate, root weld GTAW with deposit
thickness 5mm, balance of weld SMAW (10mm)
PQR 2 - SAW qualified on 40mm plate (back gouged and back
welded) with deposit thickness 40mm
(Assuming all other essential variables are satisfied and
impacts are not required)

WPS supported by PQR 1 with GTAW root and PQR 2 SAW fill:
Qualified base metal thickness range: 10mm to 200mm (QW-451.1 range
for SAW)
Maximum qualified GTAW root deposit thickness: 10mm (2t - GTAW)
Maximum qualified SAW deposit (fill) thickness: 200mm

Reference: Interpretations IX-81-32, IX-04-18, IX-80-NNAE


Hope this helps.

John Henning
Senior Welding Engineer


-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of VJ V
Sent: Wednesday, February 25, 2009 1:15 AM
To: Materials & Welding
Subject: [MW:1638] Re: WPS from 2 PQRs


Dear Prasad,
Let me make it clear...

QW 200.2(f) states about One WPS from several PQRs and vise versa.

Assume, I have got a PQR of GTAW of 4mm thick, and another PQR of 10mm
thick SMAW.
I would like to write a WPS for 20mm thick with GTAW+SMAW as the above
mentioned PQRs supporting(Assume all other variables are meeting the
req.)----Is it possibe ?

Is it possibel to write a WPS of (4+10)x 2 = 28mm thick (2t range)?

As I qouted earlier, QW 200.2(f) gives an example about write a WPS for 1.5
mm thick thru 32mm thick.So the PQRs may be of (1)which cover upto 1.5mm to
5mm thick for its WPS (2) which cover from 5mm to 32mm thick.

Regards


On Feb 24, 10:02 am, VJ V <veeve...@gmail.com> wrote:
> Hi everyone,
>
> I would like to know reg Sec IX,QW 200.2(f) and QW 200.4(a)
>
> 200.2(f) states " A single WPS may cover several essential variable
> changes......(eg. a single WPS may cover a thinkness range from 1.5mm
> thru 32mm if PQR exist for both 1.5 to 5mm and 5mm thru 32 mm ranges)
>
> But QW 200.4(a) states if all essential/supplementary essential
> variable according to QW 451 is meeting then ......
>
> My doubt is this: As per 200.2(f), "Base metal range" is not meeting
> the requirement of QW 451.
>
> But QW 200.4(a), states base metal thickness range, weld metal
> thickness range etc shall meet QW 451.
>
> Can anybody please clarify...
>
> Regrds


Save a tree...please don't print this e-mail unless you really need to.


Save a tree...please don't print this e-mail unless you really need to.


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By - No comments:

[MW:1646] FAILURE DURING PNEUMATIC TESTING

By - No comments:

[MW:1647] Re: 1638] Re: WPS from 2 PQRs

Dear John,
Thank you very much for this explanation with good example. I would like to know that in your given example , how do you calculated the base material thickness range ( 10mm - 200mm ) instead of 5mm - 200mm . kindly advice.
 
Thanking you,
Regards
Sukamal Naskar
Welding Engineer

 
On 2/26/09, John Henning <jhenning@deltak.com> wrote:

The short answer is no.

When combining multiple PQR's to support a single WPS, you are limited to the most restrictive essential variable or supplemental essential variable found on the PQR's.  If I understand correctly, in your case you have one PQR using the GTAW process qualified on 4mm thick plate and a second PQR using the SMAW process on 10mm thick plate.  I assume only GTAW or SMAW was used either PQR and that the full thickness of base metal was welded.

Then, you can write the following WPS's:

GTAW on plate, 1.5mm to 8mm, with weld deposit thickness to 8mm

SMAW on plate, 1.5mm to 20mm, with deposit thickness to 20mm

Combined GTAW and SMAW, plate thickness qualified 1.5mm to 8mm, both GTAW and SMAW deposit to the maximum thickness of 8mm.  The base metal thickness is limited for both process as the GTAW weld can ONLY be performed on base metal to a maximum of 8mm thick.

The only exception can be found in QW-200.4 (b).  When a process is used for the root weld and is qualified on a base metal 13mm and thicker, then that PQR can be used in combination with another PQR qualified for any greater thickness to write a single WPS.  The root process is limited to 2 times the deposit thickness performed on the first PQR.

An example:  PQR 1 - Qualified on 15mm plate, root weld GTAW with deposit thickness 5mm, balance of weld SMAW (10mm)
            PQR 2 - SAW qualified on 40mm plate (back gouged and back welded) with deposit thickness 40mm
           (Assuming all other essential variables are satisfied and impacts are not required)

WPS supported by PQR 1 with GTAW root and PQR 2 SAW fill:
    Qualified base metal thickness range:  10mm to 200mm  (QW-451.1 range for SAW)
    Maximum qualified GTAW root deposit thickness:  10mm  (2t - GTAW)
    Maximum qualified SAW deposit (fill) thickness:  200mm

Reference:  Interpretations IX-81-32, IX-04-18, IX-80-NNAE


Hope this helps.

John Henning
Senior Welding Engineer


-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of VJ V
Sent: Wednesday, February 25, 2009 1:15 AM
To: Materials & Welding
Subject: [MW:1638] Re: WPS from 2 PQRs


Dear Prasad,
Let me make it clear...

QW 200.2(f) states about One WPS from several PQRs and vise versa.

Assume, I have got a PQR of GTAW of 4mm thick, and another PQR of 10mm thick SMAW.
I would like to write a WPS for 20mm thick with GTAW+SMAW as the above mentioned PQRs supporting(Assume all other variables are meeting the req.)----Is it possibe ?



Is it possibel to write a WPS of (4+10)x 2 = 28mm thick (2t range)?



As I qouted earlier, QW 200.2(f) gives an example about write a WPS for 1.5mm thick thru 32mm thick.So the PQRs may be of (1)which cover upto 1.5mm to 5mm thick for its WPS (2) which cover from 5mm to 32mm thick.

Regards


On Feb 24, 10:02 am, VJ V <veeve...@gmail.com> wrote:
> Hi everyone,
>
> I would like to know reg Sec IX,QW 200.2(f) and QW 200.4(a)
>
> 200.2(f) states " A single WPS may cover several essential variable
> changes......(eg. a single WPS may cover a thinkness range from 1.5mm
> thru 32mm if PQR exist for both 1.5 to 5mm and 5mm thru 32 mm ranges)
>
> But QW 200.4(a) states if all essential/supplementary essential
> variable according to QW 451 is meeting then ......
>
> My doubt is this: As per 200.2(f), "Base metal range" is not meeting
> the requirement of QW 451.
>
> But QW 200.4(a), states base metal thickness range, weld metal
> thickness range etc shall meet QW 451.
>
> Can anybody please clarify...
>
> Regrds


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[MW:1645] Re: Combination of PQRs

Per QW-200.4 (b). When a process is used for the root weld and is
qualified on a base metal 13mm and thicker, then that PQR can be used
in combination with another PQR qualified for any greater thickness to
write a single WPS. The root process is limited to 2 times the
deposit thickness performed on the first PQR.

In your particular case the base metal qualified thickness is 10mm to
200mm, SMAW may be used for the root weld (and hot passes) to a
maximum deposited thickness of 30mm, SAW is qualified to a maximum
deposited thickness of 200mm.


Another example: PQR 1 - Qualified on 15mm plate, root weld GTAW with
deposit thickness 5mm, balance of weld SMAW (10mm)
PQR 2 - SAW qualified on 40mm plate (back
gouged and back welded) with deposit thickness 40mm
(Assuming all other essential variables are
satisfied and impacts are not required)

WPS supported by PQR 1 with GTAW root and PQR 2 SAW fill:
Qualified base metal thickness range: 10mm to 200mm (QW-451.1
range for SAW)
Maximum qualified GTAW root deposit thickness: 10mm (2t - GTAW)
Maximum qualified SAW deposit (fill) thickness: 200mm

Reference: Interpretations IX-81-32, IX-04-18, IX-80-NNAE

J

On Feb 25, 7:33 am, Muhammed Ibrahim <ibrat...@gmail.com> wrote:
> Dear All,
>
> With ref to QW 200.4 (b) combination of process
> PQR A - 15mm with SMAW process
> PQR B- 40mm with SAW process
>
> Wht is the base metal thk. qualified if we cobines WPS SMAW + SAW
> Will it be *5 to 30mm(with both SMAW & SAW - 30mm* or *5 to 200mm( with
> SMAW-30mm & SAW 200mm)*
> **
> *If any interprtation to this condition is there then it will very helpful*
>
> Thanks & Regards
> Muhammed Ibrahim PK

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Wednesday, February 25, 2009

[MW:1644] RE: 1638] Re: WPS from 2 PQRs

The short answer is no.

When combining multiple PQR's to support a single WPS, you are limited to the most restrictive essential variable or supplemental essential variable found on the PQR's. If I understand correctly, in your case you have one PQR using the GTAW process qualified on 4mm thick plate and a second PQR using the SMAW process on 10mm thick plate. I assume only GTAW or SMAW was used either PQR and that the full thickness of base metal was welded.

Then, you can write the following WPS's:

GTAW on plate, 1.5mm to 8mm, with weld deposit thickness to 8mm

SMAW on plate, 1.5mm to 20mm, with deposit thickness to 20mm

Combined GTAW and SMAW, plate thickness qualified 1.5mm to 8mm, both GTAW and SMAW deposit to the maximum thickness of 8mm. The base metal thickness is limited for both process as the GTAW weld can ONLY be performed on base metal to a maximum of 8mm thick.

The only exception can be found in QW-200.4 (b). When a process is used for the root weld and is qualified on a base metal 13mm and thicker, then that PQR can be used in combination with another PQR qualified for any greater thickness to write a single WPS. The root process is limited to 2 times the deposit thickness performed on the first PQR.

An example: PQR 1 - Qualified on 15mm plate, root weld GTAW with deposit thickness 5mm, balance of weld SMAW (10mm)
PQR 2 - SAW qualified on 40mm plate (back gouged and back welded) with deposit thickness 40mm
(Assuming all other essential variables are satisfied and impacts are not required)

WPS supported by PQR 1 with GTAW root and PQR 2 SAW fill:
Qualified base metal thickness range: 10mm to 200mm (QW-451.1 range for SAW)
Maximum qualified GTAW root deposit thickness: 10mm (2t - GTAW)
Maximum qualified SAW deposit (fill) thickness: 200mm

Reference: Interpretations IX-81-32, IX-04-18, IX-80-NNAE


Hope this helps.

John Henning
Senior Welding Engineer


-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of VJ V
Sent: Wednesday, February 25, 2009 1:15 AM
To: Materials & Welding
Subject: [MW:1638] Re: WPS from 2 PQRs


Dear Prasad,
Let me make it clear...

QW 200.2(f) states about One WPS from several PQRs and vise versa.

Assume, I have got a PQR of GTAW of 4mm thick, and another PQR of 10mm thick SMAW.
I would like to write a WPS for 20mm thick with GTAW+SMAW as the above mentioned PQRs supporting(Assume all other variables are meeting the req.)----Is it possibe ?

Is it possibel to write a WPS of (4+10)x 2 = 28mm thick (2t range)?

As I qouted earlier, QW 200.2(f) gives an example about write a WPS for 1.5mm thick thru 32mm thick.So the PQRs may be of (1)which cover upto 1.5mm to 5mm thick for its WPS (2) which cover from 5mm to 32mm thick.

Regards


On Feb 24, 10:02 am, VJ V <veeve...@gmail.com> wrote:
> Hi everyone,
>
> I would like to know reg Sec IX,QW 200.2(f) and QW 200.4(a)
>
> 200.2(f) states " A single WPS may cover several essential variable
> changes......(eg. a single WPS may cover a thinkness range from 1.5mm
> thru 32mm if PQR exist for both 1.5 to 5mm and 5mm thru 32 mm ranges)
>
> But QW 200.4(a) states if all essential/supplementary essential
> variable according to QW 451 is meeting then ......
>
> My doubt is this: As per 200.2(f), "Base metal range" is not meeting
> the requirement of QW 451.
>
> But QW 200.4(a), states base metal thickness range, weld metal
> thickness range etc shall meet QW 451.
>
> Can anybody please clarify...
>
> Regrds

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By - No comments:

[MW:1641] Re: flatolet

The flatolet is basically "olet" to be used on flat surface or on the very
large run sizes (where the difference of curvature becomes less and less
significant. As per bonney forge catalogue, the weldolet for run sizes
larger than 36" (DN 1800) will be considered as flatolet.

Please note that one needs to specify this in the purchase order whether
you require flatolet.

Hope to have clarified

Best regards,

Prasad


"Sreejith.Nair"
<fizzyshadow@gmai
l.com> To
Sent by: materials-welding@googlegroups.com
materials-welding cc
@googlegroups.com
Subject
[MW:1639] flatolet
25/02/09 06:42 PM


Please respond to
materials-welding
@googlegroups.com

can anybody please explain what a flatolet is?? it would be a great help if
a picture of the same can be posted.



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By - No comments:

[MW:1643] Re: flatolet

Sreejith,
 
Olet which will be in Flat. Assy in plate etc.. Find attached fig.
 
Regards,
S.Senthilkumar

--- On Wed, 25/2/09, Sreejith.Nair <fizzyshadow@gmail.com> wrote:
From: Sreejith.Nair <fizzyshadow@gmail.com>
Subject: [MW:1639] flatolet
To: materials-welding@googlegroups.com
Date: Wednesday, 25 February, 2009, 8:12 PM

By - No comments:

[MW:1642] Re: FW: API 5L Gr B and A 106 Gr B

Dear all,

This is not true always. (use as an alternate to each other). Some occasions
one standard pipe can not be replaced/used in place of other, depending upon
design/ service requirement.

The common similarity between these pipes are Tensile & yield strength
property.

ASTM A 106 pipe is seamless by default (Always), whereas API 5L may be
manufactured as welded construction as well. Some specific cases, designer
specifies only seamless pipes (A 106) are acceptable, you may not able to
replace it with API 5L Gr B (welded) pipe.

A 106 need not be tested for notch toughness. Where as API 5L pipes can be
'demanded' for notch toughness test.
At locations/conditions where materials need to be have notch toughness &
resist crack propagation, API 5L certified pipes are recommended & preferred
rather than A 106.

Regards,
Sanjeevan

----- Original Message -----
From: "rutvik dixit" <rutvikdixit@yahoo.co.in>
To: <materials-welding@googlegroups.com>
Sent: Wednesday, February 25, 2009 6:40 PM
Subject: [MW:1640] Re: FW: API 5L Gr B and A 106 Gr B


Dear Rafique,
You can use both as alternate to each other.for detail please
refer mech,chem props,service condition in their respected API and ASTM
spec.

Regards,
Rutvik


--- On Tue, 24/2/09, rafique naik <rafiquenaik@hotmail.com> wrote:

> From: rafique naik <rafiquenaik@hotmail.com>
> Subject: [MW:1619] FW: API 5L Gr B and A 106 Gr B
> To: "welding group" <materials-welding@googlegroups.com>
> Date: Tuesday, 24 February, 2009, 11:57 PM
> Dear ALL,
>
> Please explain the difference as asked my Mick....., I am
> forwarding this mail to the group because I know this mail
> will reach to experts and they can reply in better way.
>
> Thanks and regards,
>
> Rafique
>
> From: crc1199@hotmail.com
> To: rafiquenaik@hotmail.com
> Subject: API 5L Gr B and A 106 Gr B
> Date: Tue, 24 Feb 2009 13:15:47 -0500
>
>
>
>
>
>
>
>
> Dear Rafique,
>
> Please explain me what is the difference between API 5L Gr
> B and ASTM A 106 Gr.B pipes.
>
> Regards,
>
> MICK
>
> Access your email online and on the go with Windows Live
> Hotmail. Sign up today.
> _________________________________________________________________
> Chose your Life Partner! Join MSN Matrimony FREE
> http://www.in.msn.com/matrimony
>

Add more friends to your messenger and enjoy! Go to
http://messenger.yahoo.com/invite/

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By - No comments:

[MW:1639] flatolet


can anybody please explain what a flatolet is?? it would be a great help if a picture of the same can be posted.


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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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By - No comments:

[MW:1640] Re: FW: API 5L Gr B and A 106 Gr B

Dear Rafique,
You can use both as alternate to each other.for detail please refer mech,chem props,service condition in their respected API and ASTM spec.

Regards,
Rutvik


--- On Tue, 24/2/09, rafique naik <rafiquenaik@hotmail.com> wrote:

> From: rafique naik <rafiquenaik@hotmail.com>
> Subject: [MW:1619] FW: API 5L Gr B and A 106 Gr B
> To: "welding group" <materials-welding@googlegroups.com>
> Date: Tuesday, 24 February, 2009, 11:57 PM
> Dear ALL,
>
> Please explain the difference as asked my Mick....., I am
> forwarding this mail to the group because I know this mail
> will reach to experts and they can reply in better way.
>
> Thanks and regards,
>
> Rafique
>
> From: crc1199@hotmail.com
> To: rafiquenaik@hotmail.com
> Subject: API 5L Gr B and A 106 Gr B
> Date: Tue, 24 Feb 2009 13:15:47 -0500
>
>
>
>
>
>
>
>
> Dear Rafique,
>
> Please explain me what is the difference between API 5L Gr
> B and ASTM A 106 Gr.B pipes.
>
> Regards,
>
> MICK
>
> Access your email online and on the go with Windows Live
> Hotmail. Sign up today.
> _________________________________________________________________
> Chose your Life Partner! Join MSN Matrimony FREE
> http://www.in.msn.com/matrimony
>

Add more friends to your messenger and enjoy! Go to http://messenger.yahoo.com/invite/

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By - No comments:

[MW:1635] Combination of PQRs

Dear All,
 
With ref to QW 200.4 (b) combination of process
PQR A - 15mm with SMAW process
PQR B- 40mm with SAW process
 
Wht is the base metal thk. qualified if we cobines WPS SMAW + SAW
Will it be 5 to 30mm(with both SMAW & SAW - 30mm or 5 to 200mm( with SMAW-30mm & SAW 200mm)
 
If any interprtation to this condition is there then it will very helpful
 


Thanks & Regards
Muhammed Ibrahim PK

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By - No comments:

[MW:1636] Re: Minimum strength requirement of procedure.

Dear Muhammad,

The strength is not an essential variable even though the Tensile Test is
essential part of the Procedure Qualification. Hence the PQR in your case,
can support both P=1, Gr. 1 and Gr. 2 materials.

The strength is guaranteed for material by material standards while the
purpose of the PQR is to see that the strength of the joint is not
adversely affected and hence the acceptance criterion for Tensile Test is
accordingly (Refer QW-153.1).

Hope to have clarified,

Best regards,

Prasad



Sukamal Naskar
<sukamalbecmet@gm
ail.com> To
Sent by: materials-welding@googlegroups.com
materials-welding cc
@googlegroups.com
Subject
[MW:1634] Re: Minimum strength
25/02/09 03:43 PM requirement of procedure.


Please respond to
materials-welding
@googlegroups.com


Dear Friend,
I expect that the value you mentioned 62 KSI is the tensile strength, which
you have found during your PQR qalification. As you have welded with SA 516
Gr. 60 with Gr. 70 material,if during tensile testing, the tensile specimen
start necking on the base material ( SA 516 Gr.60 ) side, not on the weld
metal, then you can use a WPS supporting this PQR for the welding of SA516
Gr.70 to SA516Gr.70, unless other parameters used on the PQR are same.
It is ofcourse that you are using , one base material having min TS 60Ksi,
another one min 70 Ksi and also the used welding consumable TS min 70Ksi,
hence during the tensile testing , the sample will form neck from the
weaker region.

Regards,

On Wed, Feb 25, 2009 at 7:14 PM, Muhammed Ibrahim <ibratech@gmail.com>
wrote:
Hi friends,

I need clarification on one important thing regarding PQR.

PQR is qualified with SA516Gr.60 ( P1 Gr.1) to SA516Gr.70( P1 Gr.2) wth
E7018-1 Electrode and it passes at 62 KSI strength.
Can it be used for SA516Gr.70 to SA516Gr.70 production weld based on the
above results?.

As the production material require 70 KSI strength, how this procedure
will support for SA516Gr.70 to SA516Gr.70welding


Thanks & Regards
Muhammed Ibrahim PK

--
Sukamal Naskar
Malaysia


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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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