Materials & Welding: April 2010

Friday, April 30, 2010

Re: Re: [MW:5000] DSS pipe cutting

If feasible you can try Water Jet Cutting !

Regards

Prem Nautiyal

On Thu, 29 Apr 2010 19:42:32 +0530 wrote
>Please check with your machine manufacturer if it is suitable for mixed gas
This will give a far cleaner cut and will remove the possibilities of moisture entering into the plasma stream
Best Regards

PHIL CHEW

Global Segment Manager -Transport ,Shipbuilding,M&R

ESAB Holdings Ltd, 322 High Holborn, London, UK, WC1V 7PB

Tel: +44 (0) 7584 219132

email: PHIL.CHEW@esab.net

ESAB Holdings Ltd is a company registered in England and Wales . Co registration no 1687590 Registered Office: 322 High Holborn, London , UK , WC1V 7PB www.esab.comPlease consider the environment before printing this email.
From: Pratheesh Chandran [chichuprem@gmail.com]
Sent: 29/04/2010 09:50 ZE4
To: materials-welding@googlegroups.com
Subject: [MW:4994] DSS pipe cutting

dear All

Please provide your expertise for the below problem

I need to take a branch connection of 4" from a pipe 12" A790 UNS 31803 and had been using plasma cutting to do the same. However soon after carrying out the Plasma cutting it was noticed that the inner wall of 12" pipe starts getting corroded due to the sparks impinching on the inner wall of the pipe arised during plasma cutting ,( attached Photo graphs )

Kindly advise how to avoid the same or any other suitable precautionary steps to be taken during cutting on DSS.

Regds
Prem

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This communication and any files transmitted with it contain information which is confidential and which may also be privileged. It is for the exclusive use of the intended recipient(s). If you are not the intended recipient(s), please note that any disclosure, copying, printing or use whatsoever of this communication or the information contained in it is strictly prohibited. If you have received this communication in error, please notify us by e-mail or by telephone as above and then delete the e-mail together with any copies of it. ESAB does not accept liability for the integrity of this message or for any changes, which may occur in transmission due to network, machine or software failure or manufacture or operator error. Although this communication and any files transmitted with it are believed to be free of any virus or any other defect which might affect any computer or IT system into which they are received and opened, it is the responsibility of the recipient to ensure that they are virus free and no responsibility will be accepted by ESAB for any loss or damage arising in any way from receipt or use thereof.

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PREM S NAUTIYAL
CELL : 9820313278

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Thursday, April 29, 2010

[MW:4999] RE: 4998] mode of metal transfer in mig welding

AWS welding handbook says the following for CO2 with GMAW:

. . . "With a CO2 shield, the metal transfer mode is either short circuiting or globular. Axial spray transfer requires an argon shield and cannot be achieved with a CO2 shield. With globular transfer the arc is quite harsh and produces a high level of spatter." (implied if transfer is globulr then) "This requires that CO2 welding conditions be set to provide a very short "buried arc" (the tip of the electrode is actually below th surface of the work in ordre to minimize spatter."

In the US, when CO2 is used as a shielding gas, the transfer mode is nearly always short circuiting arc transfer (dip). My understanding is that in Europe globular transfer is not uncommon, but I have little experience with it in actual welding. If your process is short circuiting transfer, and ASME Sc IX is to be applied you will need to take into account essential variables QW-403.10 and QW-404.32 which may limit the qualified thickness of base metal and filler metal. For QW-409.2 you willhave to list the transfer mode as short circuiting (dip).

Hope this helps.

John

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of durga bala suresh
Sent: Thursday, April 29, 2010 10:43 AM
To: materials-welding@googlegroups.com
Subject: [MW:4998] mode of metal transfer in mig welding

Dear Members,

we are going to qualify MIG welding process.

How to differentiate metal transfer like dip, globular & spray?

we are using IS 2062 material with 99.9% CO2 shielding gas,1.2 dia filler wire,12mm thick in single '' V'' Grove butt Joint.
what is the desired testing requirements ? depending of metal transfer as per section IX

thanks and regards,
Suresh

[MW:4998] mode of metal transfer in mig welding

Dear Members,

we are going to qualify MIG welding process.

How to differentiate metal transfer like dip, globular & spray?

thanks and regards,
Suresh

Re: [MW:4997] DSS pipe cutting

Please check with your machine manufacturer if it is suitable for mixed gas
This will give a far cleaner cut and will remove the possibilities of moisture entering into the plasma stream
Best Regards

PHIL CHEW

Global Segment Manager -Transport ,Shipbuilding,M&R

ESAB Holdings Ltd, 322 High Holborn, London, UK, WC1V 7PB

Tel: +44 (0) 7584 219132

email: PHIL.CHEW@esab.net

ESAB Holdings Ltd is a company registered in England and Wales . Co registration no 1687590 Registered Office: 322 High Holborn, London , UK , WC1V 7PB www.esab.comPlease consider the environment before printing this email.

From: Pratheesh Chandran [chichuprem@gmail.com]
Sent: 29/04/2010 09:50 ZE4
To: materials-welding@googlegroups.com
Subject: [MW:4994] DSS pipe cutting

dear All

Please provide your expertise for the below problem

I need to take a branch connection of 4" from a pipe 12" A790 UNS 31803 and had been using plasma cutting to do the same. However soon after carrying out the Plasma cutting it was noticed that the inner wall of 12" pipe starts getting corroded due to the sparks impinching on the inner wall of the pipe arised during plasma cutting ,( attached Photo graphs )

Kindly advise how to avoid the same or any other suitable precautionary steps to be taken during cutting on DSS.

Regds

Prem

This communication and any files transmitted with it contain information which is confidential and which may also be privileged. It is for the exclusive use of the intended recipient(s). If you are not the intended recipient(s), please note that any disclosure, copying, printing or use whatsoever of this communication or the information contained in it is strictly prohibited. If you have received this communication in error, please notify us by e-mail or by telephone as above and then delete the e-mail together with any copies of it. ESAB does not accept liability for the integrity of this message or for any changes, which may occur in transmission due to network, machine or software failure or manufacture or operator error. Although this communication and any files transmitted with it are believed to be free of any virus or any other defect which might affect any computer or IT system into which they are received and opened, it is the responsibility of the recipient to ensure that they are virus free and no responsibility will be accepted by ESAB for any loss or damage arising in any way from receipt or use thereof.

Re: [MW:4993] API 5L X85 -CVN Requirements

Dear Kathalingam Babu,

40J (30 Ft-lbf) for pipe in grades > X 80 grade materials & less than 19mm thick. The HAZ for the longitudinal seam weld in HFW welded pipe is usually too narrow to permit accurate sampling for Charpy testing. The requirement for Charpy testing of the seam weld HAZ applies only to SAWL/ SAWH and COWL/ COWH pipe.

On Tue, Apr 27, 2010 at 1:22 PM, Kathalingam Babu <kathalingam.qaqc@ppl.com.sg> wrote:

Gents,

Pls tell me, what is the CVN (Longitudinal) Requirements for the API 5L X85 (19 mm thick) ?

Thanks & Regards,

K.Babu

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--
Yadav Shiva Chelliya,
Inspection Engineer,
Doha Qatar,
+974-6166465

[MW:4994] DSS pipe cutting

dear All

Please provide your expertise for the below problem

Kindly advise how to avoid the same or any other suitable precautionary steps to be taken during cutting on DSS.

Regds

Prem

Re: [MW:4995] RE: 4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS

Dear Mr. Augstin,

Can you tell us what is your offshore requirement... Cleaning up to?, paint systems???

Regards,

Y.C.Shiva,

Doha Qatar,

+974-6166465

On Wed, Apr 28, 2010 at 7:34 PM, Kristian Lund Jepsen (KUJ) <KUJ@ramboll.com> wrote:

You can take a look at NORSOK M-501. Ref. link:

http://www.standard.no/en/sectors/Petroleum/NORSOK-Standard-Categories/M-Material/M-5012/

This is a standard open for everybody and free of charge.

You can always modify requirements, such as the requirements for qualifications of painting/coating systems.

regards

Kristian

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of AGUSTIN JIMENEZ
Sent: 28. april 2010 13:23
To: materials-welding@googlegroups.com
Subject: [MW:4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS

Hi.

I need information over technical specifications for paints and coating in offshore platforms used actually.

Best. Regard

Agustin Jimenez

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--
Yadav Shiva Chelliya,
Inspection Engineer,
Doha Qatar,
+974-6166465

Re: [MW:4995] Carbone Equ.

Dear All & Mr. TAMER,,

Carbon Equivalent (CE) is an empirical value in weight percent, relating the combined effects of different alloying elements used in the making of carbon steels to an equivalent amount of carbon. This value can be calculated using a mathematical equation. By varying the amount of carbon and other alloying elements in the steel, the desired strength levels can be achieved by proper heat treatment. A better weldability and low temperature notch toughness can also be obtained.

In terms of welding, the Carbon Equivalent governs the hardenability of the parent metal. It is a rating of weldability related to carbon, manganese, chromium, molybdenum, vanadium, nickel and copper content. There are several commonly used equations for expressing Carbon Equivalent. One example of such mathematical formula is:

CE = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15

The table below shows the preferred and maximum weight percent content of some elements and the diagram that follows shows the influence of certain element content on the hardness.

Element	Composition
Element	Preferred (%)	High (%)
Carbon	0.06 to 0.25	0.35
Manganese	0.35 to 0.80	1.40
Silicon	0.10 or less	0.30
Sulphur	0.035 or less	0.05
Phosphorus	0.030 or less	0.04

As such, the value of the Carbon Equivalent is a useful guide to the possibility of cracking in alloy steels by comparison with an equivalent plain carbon steel. The two main problems faced in the cracking of the welded metals are hot cracking and cold cracking.

Hot cracking occurs immediately after solidification in a weld, caused by the segregation of certain alloying elements during the solidification process. Sulphur, boron and other elements that tend to segregate excessively are reduced in order to prevent hot cracking. Cold cracking, also known as delayed or hydrogen-induced cracking, develops after solidification of the fusion zone as the result of residual stress. It generally occurs below 200°C, sometimes several hours, or even days after welding.

Although a carbon equivalent is sometimes useful in planning welding procedures, its value is limited because only the chemical composition of the steel is considered. The section size being welded and joint restraint is of equal or greater importance, because of their relations to heat input and cooling rate

The ability to form hard metallurgical constituents such as martensites or any other hard phases is dependent on the carbon equivalent and the cooling rate of the steel involved in cooling from the transformation temperature. The higher the carbon equivalent value, the faster the cooling rate, the higher the tendency for hard, brittle phases to form during cooling.

The metallurgical characteristics of steels are mainly determined by its chemical composition. As such, any small changes in its chemical composition of the base and filler metals can substantially increase cracking tendency. The risk of cracking also increases with increasing hardness of the Heat Affected Zone (HAZ) in welding for a particular hydrogen level and joint restraint. The diagram below shows the influence of carbon content and the transformation temperature on the HAZ microstructure and toughness

IT IS PURELY WELDIABILITY

Thanks & Regards,

Y.C.Shiva,

Inspection Engineer,

Qatar,

+974-6166465

On Wed, Apr 28, 2010 at 11:23 AM, tamer said <tamer_bajio@yahoo.com> wrote:

Why CE calcuations is essential ???
is it for corrosin or weldiability.
thx

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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.

--
Yadav Shiva Chelliya,
Inspection Engineer,
Doha Qatar,
+974-6166465

Re: [MW:4992] API 5L X85 -CVN Requirements

Hi Carlos Quintini

It is obvious that, the longi specimen CVN values is more than the transverse specimen CVN values.

Since if we need to follow ABS Modu code, which calls the CVN test at Weld metal, Fusion Line, 2 mm, 5 mm ;

If i take transverse CVN samples for PQR, will be require more set of pipes to do the CVN tests.

From my point of View, it is immaterial, whether we taking Longi or transverse specimen, weldment should satisfy the requirement.

Rgds,

K.Babu

----- Original Message -----

From: Carlos Quintini

To: materials-welding@googlegroups.com

Sent: Thursday, April 29, 2010 12:53 AM

Subject: Re: [MW:4990] API 5L X85 -CVN Requirements

Mr. K. Babu:

API 5L ,ed. 44, does not request longitudinal CVN test, because due to rolling process for plate production for seam weld pipe or seamless pipe, the grain orientation of the microstructure has the lowest fracture toughness values transverse to pipe axis. Therefore, CVN spicemens must be taken transverse to the pipe axis based on the fact that this is the most unfavorable spicemen orientation to obtain the minimum requested absorbed energy values

On the other hand, X85 grade is an intermediate grade agreed for production between purchaser and manufacture

According to table 8 of API 5L, for body full size absorb energy the values for X85 grade can be interpolated according to values for grades X80 and X90 which is 30 ft-lb for pipe diameters from 20 to 36 inches and for test temp of 0°C (32°F), or lower temperature if agreed.

For CVN test for seam weld and H.A.Z., according to 9.8.3, the absorb energy value is also 30 ft-lb at 0°C (32°F), or lower temperature if agreed.

Carlos Quintini

Quintini Consultores C.A.

Venezuela

2010/4/28 Kathalingam Babu <kathalingam.qaqc@ppl.com.sg>

There is an intermediate grade called API 5L X85 , it is commonly used in offshore industries.

Might be added in next edition of API 5L Spec.

----- Original Message -----

From: Bathula Raghuram (Mumbai - PIPING)

To: materials-welding@googlegroups.com

Sent: Wednesday, April 28, 2010 4:17 PM

Subject: RE: [MW:4973] API 5L X85 -CVN Requirements

I heard that 44th edition of API 5L has 3 new grades X90, X100 and X120.

what is X85? CVN is mandatory for all PSL2 pipes, refer para 6.2.5.2

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kathalingam Babu
Sent: Tuesday, April 27, 2010 3:53 PM
To: materials-welding@googlegroups.com
Subject: [MW:4966] API 5L X85 -CVN Requirements

Gents,

Pls tell me, what is the CVN (Longitudinal) Requirements for the API 5L X85 (19 mm thick) ?

Thanks & Regards,

K.Babu

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Wednesday, April 28, 2010

Re: [MW:4990] API 5L X85 -CVN Requirements

Mr. K. Babu:

API 5L ,ed. 44, does not request longitudinal CVN test, because due to rolling process for plate production for seam weld pipe or seamless pipe, the grain orientation of the microstructure has the lowest fracture toughness values transverse to pipe axis. Therefore, CVN spicemens must be taken transverse to the pipe axis based on the fact that this is the most unfavorable spicemen orientation to obtain the minimum requested absorbed energy values

On the other hand, X85 grade is an intermediate grade agreed for production between purchaser and manufacture

According to table 8 of API 5L, for body full size absorb energy the values for X85 grade can be interpolated according to values for grades X80 and X90 which is 30 ft-lb for pipe diameters from 20 to 36 inches and for test temp of 0°C (32°F), or lower temperature if agreed.

For CVN test for seam weld and H.A.Z., according to 9.8.3, the absorb energy value is also 30 ft-lb at 0°C (32°F), or lower temperature if agreed.

Carlos Quintini

Quintini Consultores C.A.

Venezuela

2010/4/28 Kathalingam Babu <kathalingam.qaqc@ppl.com.sg>

There is an intermediate grade called API 5L X85 , it is commonly used in offshore industries.

Might be added in next edition of API 5L Spec.

----- Original Message -----

From: Bathula Raghuram (Mumbai - PIPING)

To: materials-welding@googlegroups.com

Sent: Wednesday, April 28, 2010 4:17 PM

Subject: RE: [MW:4973] API 5L X85 -CVN Requirements

I heard that 44th edition of API 5L has 3 new grades X90, X100 and X120.

what is X85? CVN is mandatory for all PSL2 pipes, refer para 6.2.5.2

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kathalingam Babu
Sent: Tuesday, April 27, 2010 3:53 PM
To: materials-welding@googlegroups.com
Subject: [MW:4966] API 5L X85 -CVN Requirements

Gents,

Pls tell me, what is the CVN (Longitudinal) Requirements for the API 5L X85 (19 mm thick) ?

Thanks & Regards,

K.Babu

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[MW:4990] RE: 4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS

You can take a look at NORSOK M-501. Ref. link:

http://www.standard.no/en/sectors/Petroleum/NORSOK-Standard-Categories/M-Material/M-5012/

This is a standard open for everybody and free of charge.

You can always modify requirements, such as the requirements for qualifications of painting/coating systems.

regards

Kristian

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of AGUSTIN JIMENEZ
Sent: 28. april 2010 13:23
To: materials-welding@googlegroups.com
Subject: [MW:4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS

Hi.

I need information over technical specifications for paints and coating in offshore platforms used actually.

Best. Regard

Agustin Jimenez

[MW:4985] FW: 4964] Anhydrous Ammonia Code

Vijay,

Is your query on the storage of anhydrous ammonia? Then you need to incorporate some additional design requirements in your system:-

· Design code for vessels and exchangers or other static equipments:-ASME SecVIII, DIV-1 or BS-5500/PED directive. Additionally the equipments shall be PWHT, and if the design below -33⁰C materials and welds shall be impact tested to UCS-66.

· Piping design codes ASME B-31.3 or equivalent European design codes. Materials requirements shall be same as the static equipments.

· Addtionally there should be a comprehensive and periodic inspection program for all the equipments.

Usually the design codes as mentioned above are popular choices for equipment design. For storage and handling CGA G-2.1 or ANSI K 61.1 are followed commonly in North America. However the additional requirements on design and fabrication following NACE document (5A192) would be good to incorporate. I have attached the extract from this document below.

I have attached some articles on anhydrous ammonia, hope it would be of interest to you, especially the one from National Board.

Thanks.

Pradip Goswami, P.Eng.

Welding & Metallurgical Engineer/Specialist

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

NACE International Publication 5A192 (2004 Edition), Integrity of Equipment in Anhydrous Ammonia Storage and Handling

Vessel Design

The Compressed Gas Association has issued a standard as ANSI K 61.1, "Safety Requirements for the Storage and Handling of Anhydrous Ammonia," (or CGA G-2.1) for use during construction of anhydrous ammonia storage vessels. This standard includes design and construction details regarding joint efficiency, post weld heat treatment,

and type of steel.

That standard states, "An exception to the ASME Code requirements is that construction under Table UW 12 at a basic joint efficiency of under 80% is not authorized." It also states, "The entire container shall be post weld heat treated . . . as prescribed in the ASME code."

"Steels used in fabricating pressure containing parts of a container shall have tensile strength no greater than a nominal 70,000 psi (480 MPa)." A British code of practice also recommends restrictions on the yield strength of materials used for anhydrous ammonia storage. Fabrication defects can act as sites for initiation of ammonia SCC because of stress concentration.

Shot peening has been suggested as a technique for stress modification but no practical experience has been reported. An isolated failure in a piping system has been reported. These systems are not generally stress relieved.

-----Original Message-----

From: materials-welding@googlegroups.com

[mailto:materials-welding@googlegroups.com] On Behalf Of Kadam Vijay (Mumbai- Piping)

Sent: Tuesday, April 27, 2010 9:27 AM

To: materials-welding@googlegroups.com

Subject: [MW:4964] Anhydrous Ammonia Code

Dear All,

In one of our ammonia project as per client's document we have to follow the requirements of Anhydrous Ammonia code.

Can someone guide me about this code. What all are the requirements of this Code ??

Thank you for your kindly help.

Kind Regards,

Vijay Kadam

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[MW:4989] Re: Carbone Equ.

Tamar,

In regards to your question about sour service........It has been
determined that hard spots in materials (HAZ and welds) are
susceptible or may lead to cracking in different types of corrosive
service and the hardness limits and recommendations are defined in
NACE MR0175 and NACE MR0103/SP0472. I am assuming you will be dealing
with a carbon steel for the pipe. The lower the CE, the better the
chances of meeting the hardness requirments in the HAZ especially if
you are welding without a post weld heat treatment. Since you are
welding pipe and most likely will not do a stress relief, a CE=0.38 or
less will give you the best chance to meet the hardness limits in the
HAZ. You will still need to qualify a welding procedure to
demonstrate that you can meet the hardness limits if you are welding
to NACE MR0175, NACE MR0103. This is just the tip of the iceberg!

On Apr 28, 4:48 am, tamer said <tamer_ba...@yahoo.com> wrote:
> Dear Mr. Rupesh A. Jambhale
> Thanks for your answer first of all.
> now I am working in project which its material specification spicify that max. CE shall not exceed .38% becasue this for soure service, so , what is the relation between CE and soure service pipeline.
> Best regards
> --- On Wed, 4/28/10, Jambhale, Rupesh A <Rupesh.Jambh...@mottmac-india.com> wrote:
>
> From: Jambhale, Rupesh A <Rupesh.Jambh...@mottmac-india.com>
> Subject: RE: [MW:4977] Carbone Equ.
> To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
> Date: Wednesday, April 28, 2010, 10:30 AM
>
> Dear Tamer,
>
> Carbon equivalents (CE) seek to account for the sum of the effects of the several elements present in steel on its hardenability, and thus the susceptibility of a weld to cracking. It calculates the steel's potential to form martensite or strengthening carbides based upon the steel chemistry. The higher the carbon equivalent, the harder the steel becomes and more prone to cracking upon cooling. Steels with carbon equivalents (CE) less than 0.4 percent are typically easy to weld and welded without special welding methods.
>
> Different codes/ Standards/ literature specify different formulae for calculating CE. Most widely followed is AWS D1.1 which is as follows
>
> CE = C + (Mn + Si)/6 + (Cr + Mo + V)/5 + (Ni+Cu)/15
>
> However, Hardnability can be also controlled by pre-heating and thereby reducing the cooling rate and preventing the formation of martensite
>
> Regards,
> Rupesh A. Jambhale
> Inspection Department,
> Oil, Gas & Petrochemical Division,
> Mott MacDonalds Consultants ( I) Pvt Ltd., Mumbai
>
>
>
> -----Original Message-----
> From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of tamer said
> Sent: 28 April 2010 13:53
> To: materials-welding@googlegroups.com
> Subject: [MW:4974] Carbone Equ.
>
> Why CE calcuations is essential ???
> is it for corrosin or weldiability.
> thx
>
>
> ______________________________________________________________________
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>
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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.- Hide quoted text -
>
> - Show quoted text -

[MW:4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS

Hi.

I need information over technical specifications for paints and coating in offshore platforms used actually.

Best. Regard

Agustin Jimenez

Re: [MW:4983] API 5L X85 -CVN Requirements

There is an intermediate grade called API 5L X85 , it is commonly used in offshore industries.

Might be added in next edition of API 5L Spec.

----- Original Message -----

From: Bathula Raghuram (Mumbai - PIPING)

To: materials-welding@googlegroups.com

Sent: Wednesday, April 28, 2010 4:17 PM

Subject: RE: [MW:4973] API 5L X85 -CVN Requirements

I heard that 44th edition of API 5L has 3 new grades X90, X100 and X120.

what is X85? CVN is mandatory for all PSL2 pipes, refer para 6.2.5.2

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kathalingam Babu
Sent: Tuesday, April 27, 2010 3:53 PM
To: materials-welding@googlegroups.com
Subject: [MW:4966] API 5L X85 -CVN Requirements

Gents,

Pls tell me, what is the CVN (Longitudinal) Requirements for the API 5L X85 (19 mm thick) ?

Thanks & Regards,

K.Babu

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Re: [MW:4982] API 5L X85 -CVN Requirements

Hi,

As per API 5L - 44th edition X85 grade is not there. For the CVN values refer 9.8.2.3 of API 5L 44 th edition.

K.Ramalingeshwara Rao.

On Wed, Apr 28, 2010 at 11:17 AM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:

I heard that 44th edition of API 5L has 3 new grades X90, X100 and X120.

what is X85? CVN is mandatory for all PSL2 pipes, refer para 6.2.5.2

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kathalingam Babu
Sent: Tuesday, April 27, 2010 3:53 PM

To: materials-welding@googlegroups.com
Subject: [MW:4966] API 5L X85 -CVN Requirements

Gents,

Pls tell me, what is the CVN (Longitudinal) Requirements for the API 5L X85 (19 mm thick) ?

Thanks & Regards,

K.Babu

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Re: [MW:4981] about boron content in SA 516 grade 70 plates

Since the effect of boron on the material properties & Weldability is still under research.

If you contact the IGCAR kalpakkam , you can get the exact answer.

There is some research is going on this chapter in IGCAR.

It is common understanding is effect of boron on steel is increases the Hardenability of steel ,but, still lot to reveal in this chapter.

Rgds,

K.Babu

Singapore

----- Original Message -----

From: Vikas Shah

To: materials-welding@googlegroups.com

Sent: Wednesday, April 28, 2010 4:14 PM

Subject: Re: [MW:4972] about boron content in SA 516 grade 70 plates

Dear Sir

With reference ur mail on nov 30 2009 you told that it is ok if it is upto 0.003% and what difference it make if there is boron in the plates is excessive amount can you give me any detailss weather it can be use or not or any thing related to this in astm books

Monday, November 30, 2009

[MW:3769] RE: SA 516 GR 70 plates-Boron content- clarification

Boron can significantly increase the hardenability of steel without loss of ductility. Its effectiveness is most noticeable at lower carbon levels. The addition of boron is usually in very small amounts ranging from 0.0005 to 0.003 %; usually fastener steels contain boron for hardenability. Check hardness?

Refer UG 10 if it is a div1 vessel "consideration should be given to making analyses for elements not specified in the specification but that would be deleterious if present in excessive amounts"

May be you can ask the plate mill, what is excessive amount?

From: Qamlr [mailto:qamlr@cicb-chemicon.com]
Sent: Monday, November 30, 2009 2:35 PM
To: materials-welding@googlegroups.com
Subject: SA 516 GR 70 plates-Boron content- clarification

Dear All

As per the SA 516 GR 70, boron content is not specified and shall not be present as specified element. For SA 516 GR 70 plate manufacturer certifies that this element is within permissible limit

Kindly give your suggestions to what basis we can certify for Coded vessels being constructed

Also kindly brief as to why the presence of boron and its affect??

Thanks in advance & regards

Prashanth Hegde

Head Quality

Regards,

Vikas Dinesh Shah

----- Original Message -----

From: Qamlr

To: materials-welding@googlegroups.com

Sent: Wednesday, April 28, 2010 11:55

Subject: RE: [MW:4970] about boron content in SA 516 grade 70 plates

Dear Mr. Vikas

Boron requirement as an unspecified element shall not exceed 0.0005 percent ( as per SA 941 under discussion chapter).

Regards

Prashanth Hegde

Head Quality

CICB-Chemicon Pvt. Ltd

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Vikas Shah
Sent: Wednesday, April 28, 2010 11:48 AM
To: materials-welding@googlegroups.com
Subject: [MW:4969] about boron content in SA 516 grade 70 plates

Dear Sir

Is boron allowed in the SA516 grade 70 plates upto 0.0014%

Regards,

Vikas Dinesh Shah

Sanghavi Bothra Engineering Co. Pvt. Ltd.
56, Kika Street, Gulalwadi,
Mumbai – 400004. India.
Mobile: +91-9821532896
Tel: +91-22-40416200 / Fax: +91-22-23452161
Direct Line: +91-22-40416223
E-mail - vikas@sbecpl.com
Website: - www.sbecpl.com

Please consider the environment before printing this e-mail

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RE: [MW:4980] Carbone Equ.

Hydrogen levels of the filler metals should also be taken into
consideration and may allow for a reduction in preheating
Best Regards

PHIL CHEW
Global Segment Manager -Transport ,Shipbuilding,M&R

ESAB Holdings Ltd, 322 High Holborn, London, UK, WC1V 7PB

Tel: +44 (0) 7584 219132

email: PHIL.CHEW@esab.net

ESAB Holdings Ltd is a company registered in England and Wales . Co
registration no 1687590
Registered Office: 322 High Holborn, London , UK , WC1V 7PB
www.esab.com
Please consider the environment before printing this email.

"Jambhale, Rupesh
A"
<Rupesh.Jambhale@ To
mottmac-india.com "materials-welding@googlegroups.com
> "
Sent by: <materials-welding@googlegroups.com
materials-welding >
@googlegroups.com cc

Subject
28/04/2010 09:39 RE: [MW:4977] Carbone Equ.

Please respond to
materials-welding
@googlegroups.com

Dear Tamer,

Carbon equivalents (CE) seek to account for the sum of the effects of the
several elements present in steel on its hardenability, and thus the
susceptibility of a weld to cracking. It calculates the steel's potential
to form martensite or strengthening carbides based upon the steel
chemistry. The higher the carbon equivalent, the harder the steel becomes
and more prone to cracking upon cooling. Steels with carbon equivalents
(CE) less than 0.4 percent are typically easy to weld and welded without
special welding methods.

Different codes/ Standards/ literature specify different formulae for
calculating CE. Most widely followed is AWS D1.1 which is as follows

CE = C + (Mn + Si)/6 + (Cr + Mo + V)/5 + (Ni+Cu)/15

However, Hardnability can be also controlled by pre-heating and thereby
reducing the cooling rate and preventing the formation of martensite

Regards,
Rupesh A. Jambhale
Inspection Department,
Oil, Gas & Petrochemical Division,
Mott MacDonalds Consultants ( I) Pvt Ltd., Mumbai

-----Original Message-----
From: materials-welding@googlegroups.com [
mailto:materials-welding@googlegroups.com] On Behalf Of tamer said
Sent: 28 April 2010 13:53
To: materials-welding@googlegroups.com
Subject: [MW:4974] Carbone Equ.

Why CE calcuations is essential ???
is it for corrosin or weldiability.
thx

______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email
______________________________________________________________________

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Materials & Welding

Friday, April 30, 2010

Re: Re: [MW:5000] DSS pipe cutting

Thursday, April 29, 2010

[MW:4999] RE: 4998] mode of metal transfer in mig welding

[MW:4998] mode of metal transfer in mig welding

Re: [MW:4997] DSS pipe cutting

Re: [MW:4993] API 5L X85 -CVN Requirements

[MW:4994] DSS pipe cutting

Re: [MW:4995] RE: 4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS

Re: [MW:4995] Carbone Equ.

Re: [MW:4992] API 5L X85 -CVN Requirements

Wednesday, April 28, 2010

Re: [MW:4990] API 5L X85 -CVN Requirements

[MW:4990] RE: 4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS

[MW:4985] FW: 4964] Anhydrous Ammonia Code

[MW:4989] Re: Carbone Equ.

[MW:4988] TECHNICAL SPECIFICATIONS FOR PAINTS AND COATINGS IN OFFSHORE PLATFORMS

Re: [MW:4983] API 5L X85 -CVN Requirements

Re: [MW:4982] API 5L X85 -CVN Requirements

Re: [MW:4981] about boron content in SA 516 grade 70 plates

Dear Sir

With reference ur mail on nov 30 2009 you told that it is ok if it is upto 0.003% and what difference it make if there is boron in the plates is excessive amount can you give me any detailss weather it can be use or not or any thing related to this in astm books

Monday, November 30, 2009

[MW:3769] RE: SA 516 GR 70 plates-Boron content- clarification

RE: [MW:4980] Carbone Equ.

[MW:35346] Cast-iron welding

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