[MW:24414] Repair local PWHT,360band local PWHT,full furness PWHT.

Dear all,

PIPING Mat is cs and 35mm WPS is qualifed with dull furness pwht.welding process SMAW AND GTAW.code is ASMEix and 31.3.

To improve productivity and avoid full furness PWHT for only repair joints
WHAT EXTRA THINGS OR NDE OR PRECAUTION SHOULD TAKE FOR LOCAL REAPIR PWHT OR 360 BAND PWHT?

Is it allowed normally or you will have to have WPS.?





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[MW:24415] PWHT

Dear all,
I have two queries:
MOC: P8Gr1(SS347 internal)
PWHT on job with LAS is at 705+/-10 degree C for 10 hrs.
Available PQR: 700 degree C for 8 hrs.
Can I support same PQR for welding of SS347 internal which will undergo PWHT at 705+/- 10 degree C along with LAS???

Impact: not applicable for SS.

Second query:
Interpretation of QW407.1 (b).

Regards,
Maulik

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Re: [MW:24411] Fillet weld cracks below 6 mm with suitable NDT.

Dear Sir,

You may carryout with UT and sketch is attached



Thanking You.

With Warm Regards,

Muthu Barathi P.
Mobile : +919967300544 (Only message )
Mobile No. +965 50989210 (KUWAIT) after 8PM


From: Mohammed Ghani <ghani386@gmail.com>
Sent: Sun, 28 Feb 2016 16:17:38
To: materials-welding@googlegroups.com
Subject: [MW:24396] Fillet weld cracks below 6 mm with suitable NDT.

Dear experts,

I want to locate Fillet weld cracks below 6 mm for 22 mm plate with double V  preparation.
Is there any special techniques from NDT I can use to identify cracks below 6 mm.

Please suggest me if any suitable NDT procedure for this. It is a bit urgent. 

Appreciate your respond.

Regards,
Mohammed ghani.

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[MW:24411] RE: Material Certificate & test requirements

 

 

Dear experts,

 

I need to procure this material

 

Hex Bolt & 2 nuts M20 x 75 based on ISO 3506-1 / A4-80 based on your experience, could you give me your feedback about material certificate, tests requirements and which I need to work with.

 

Thanks

 

ludmila

Re: [MW:24409] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

You may use SMAW with approved WPS and with expert welder but, as compared to SAW the productivity is too less, chances of defects are more, more workmanship required, more precise testing is required and no client will take chance for the delay and the quality. 

Regards,

Anosh Wankhade

From: Kannayeram Gnanapandithan <kgpandithan@gmail.com>
Sent: Mon, 29 Feb 2016 11:10:12
To: materials-welding <materials-welding@googlegroups.com>
Subject: Re: [MW:24404] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

SMAW is a time consuming and quality purely based on welder skill. SAW process is also available in Semi-Automatic process, it is gives better quality of weld, fast, aesthetic look

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

On Sat, Feb 27, 2016 at 9:12 PM, <dilintas@gmail.com> wrote:

Almost 20 years ago I was in a tank farm project were field welds were performed by means of saw

Sent from my BlackBerry 10 smartphone.

From: Prasad Sent: Σάββατο, 27 Φεβρουαρίου 2016 - 09:02 To: Materials & Welding Reply To: materials-welding@googlegroups.com Subject: [MW:24384] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

Dear welding experts,

We are manufacturing heavy wall vessels for H2 service.

MOC SA 516 Gr 70. Thick 56 mm

Due to large size vessels are to be supplied in two sections.

Hence on site weld joint will have to be done at place of installation.

At shop we are using SAW process for welding.

At field rotating is not possible and we want to use SMAW process.

Our client is asking us to use SAW process for field weld joint also.

We know that SAW is semi automatic & more productive process.

My question is whether is their any restriction to use SMAW process.

Request experts to give their valuable views to convience client technically.

Best regards,

Prasad Ghanekar

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Re: [MW:24409] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

There is no restriction, you are at full liberty to select any process suitable for your purpose, if, of course, you have an approved WPS.

 

BR,

Shashank C Vagal 

---

From: Kannayeram Gnanapandithan <kgpandithan@gmail.com>
To: materials-welding <materials-welding@googlegroups.com>
Sent: Monday, 29 February 2016 6:31 AM
Subject: Re: [MW:24404] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

SMAW is a time consuming and quality purely based on welder skill. SAW process is also available in Semi-Automatic process, it is gives better quality of weld, fast, aesthetic look

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

On Sat, Feb 27, 2016 at 9:12 PM, <dilintas@gmail.com> wrote:

Almost 20 years ago I was in a tank farm project were field welds were performed by means of saw

Sent from my BlackBerry 10 smartphone.

From: Prasad Sent: Σάββατο, 27 Φεβρουαρίου 2016 - 09:02 To: Materials & Welding Reply To: materials-welding@googlegroups.com Subject: [MW:24384] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

Dear welding experts,

We are manufacturing heavy wall vessels for H2 service.

MOC SA 516 Gr 70. Thick 56 mm

Due to large size vessels are to be supplied in two sections.

Hence on site weld joint will have to be done at place of installation.

At shop we are using SAW process for welding.

At field rotating is not possible and we want to use SMAW process.

Our client is asking us to use SAW process for field weld joint also.

We know that SAW is semi automatic & more productive process.

My question is whether is their any restriction to use SMAW process.

Request experts to give their valuable views to convience client technically.

Best regards,

Prasad Ghanekar

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RE: [MW:24407] Fillet weld cracks below 6 mm with suitable NDT.

After performing gauging, we found most of the cracks are below 6mm

On 29 Feb 2016 06:18, "Mohd Siraj" <mohd52100@gmail.com> wrote:

How u know crack is exactly 6mm below??

quite interesting.
Do RT.

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Re: [MW:24407] Fillet weld cracks below 6 mm with suitable NDT.

Dear,

It is fillet weld for sure. ...

Regards,
Mohammed ghani.

On 29 Feb 2016 06:18, "Jayachandran" <chandranv84@gmail.com> wrote:

Hello Sir,

I hope it is Butt weld T-Joint, so you can apply normal UT also.

Regards

Jayachandran V.

On Sun, Feb 28, 2016 at 1:01 PM, Mohammed Ghani <ghani386@gmail.com> wrote:

This message is eligible for Automatic Cleanup! (ghani386@gmail.com) Add cleanup rule | More info

Dear experts,

I want to locate Fillet weld cracks below 6 mm for 22 mm plate with double V  preparation.
Is there any special techniques from NDT I can use to identify cracks below 6 mm.

Please suggest me if any suitable NDT procedure for this. It is a bit urgent. 

Appreciate your respond.

Regards,
Mohammed ghani.

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Re: [MW:24406] Fillet weld cracks below 6 mm with suitable NDT.

I suppose you mean "verify" when you write "rectify". Unless you use huge magnets the max detection depth with MPI is no more than 2 mm

Sent from my BlackBerry 10 smartphone.

From: Mohammed Ghani Sent: Δευτέρα, 29 Φεβρουαρίου 2016 - 05:19 To: materials-welding@googlegroups.com Reply To: materials-welding@googlegroups.com Subject: RE: [MW:24403] Fillet weld cracks below 6 mm with suitable NDT.

Dear,

Thanks for the reply.

This is for RIG spudcan crack found after 3 years in service. .. I need to rectify if any more possible cracks available in fillet joints... usually with MPI we could locate cracks upto 5 to 6 mm...

Please prove me more suggestions.

Regards,
Mohammed ghani.

On 28 Feb 2016 17:18, "'Agustin Jimenez' via Materials & Welding" <materials-welding@googlegroups.com> wrote:

Hello

I recomend Phased Array ultrasonic technic.

Agustín
Level 2 VT PT MT UT RT


Enviado desde mi smartphone Samsung Galaxy.

-------- Mensaje original --------
De: Mohammed Ghani <ghani386@gmail.com>
Fecha:28/02/2016 04:31 AM (GMT-04:30)
Para: materials-welding@googlegroups.com
Cc:
Asunto: [MW:24396] Fillet weld cracks below 6 mm with suitable NDT.

Dear experts,

I want to locate Fillet weld cracks below 6 mm for 22 mm plate with double V  preparation.
Is there any special techniques from NDT I can use to identify cracks below 6 mm.

Please suggest me if any suitable NDT procedure for this. It is a bit urgent. 

Appreciate your respond.

Regards,
Mohammed ghani.

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Re: [MW:24405] RE: 24355] Impact Test & cooling Rate-Preheating (carbon steel)

in welding, lower thickness will have slow cooling  when compared to higher thickness weld which will have fast cooling rate, that is why to slowdown , preheat is applied to avoid hard structure which inferior for toughness properties

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

On Sat, Feb 27, 2016 at 10:21 PM, 'Shashank Vagal' via Materials & Welding <materials-welding@googlegroups.com> wrote:

One more addition to Alan's good comment:

In case of lower thicknesses, the cooling rate tends to increase and may lead to martensite formation. But it is not so slow and sustained a cooling rate as to promote grain growth/reduced ductility, as you are allowed to weld between preheat & interpass temperatures.

 

BR,

Shashank C Vagal 

---

From: Alan Denney <alan@denney1.freeserve.co.uk>
To: materials-welding@googlegroups.com
Sent: Tuesday, 23 February 2016 2:59 AM
Subject: [MW:24358] RE: 24355] Impact Test & cooling Rate-Preheating (carbon steel)

For structural steels and pipeline steels (carbon and carbon-manganese steels) the preheat requirement increases with combined thickness. See EN 1011:Part 2. The objective is to slow the cooling rate to prevent the formation of martensite which is hard and brittle and susceptible to hydrogen cracking.

 

Alan Denney

AKD Materials Consulting Ltd

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Mohd Siraj
Sent: 22 February 2016 09:22
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:24355] Impact Test & cooling Rate-Preheating (carbon steel)

 

Dear all,

 

Background: 

impact testing is more critical for less(low)thickness than higher thickness.

 

Reason  : 

fine grain form during fast cooling and course grain form during slow cooling.

 

Question is:

Preheating use to lower the cooling rate for higher thickness.

So lower the cooling rate means form the course grain,course grain lower the toughness.

 

Preheating contributing to lower the toughness?

 

 

 

 

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Re: [MW:24404] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

SMAW is a time consuming and quality purely based on welder skill. SAW process is also available in Semi-Automatic process, it is gives better quality of weld, fast, aesthetic look

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

On Sat, Feb 27, 2016 at 9:12 PM, <dilintas@gmail.com> wrote:

Almost 20 years ago I was in a tank farm project were field welds were performed by means of saw

Sent from my BlackBerry 10 smartphone.

From: Prasad Sent: Σάββατο, 27 Φεβρουαρίου 2016 - 09:02 To: Materials & Welding Reply To: materials-welding@googlegroups.com Subject: [MW:24384] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

Dear welding experts,

We are manufacturing heavy wall vessels for H2 service.

MOC SA 516 Gr 70. Thick 56 mm

Due to large size vessels are to be supplied in two sections.

Hence on site weld joint will have to be done at place of installation.

At shop we are using SAW process for welding.

At field rotating is not possible and we want to use SMAW process.

Our client is asking us to use SAW process for field weld joint also.

We know that SAW is semi automatic & more productive process.

My question is whether is their any restriction to use SMAW process.

Request experts to give their valuable views to convience client technically.

Best regards,

Prasad Ghanekar

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Re: [MW:24401] Fillet weld cracks below 6 mm with suitable NDT.

Hello Sir,

I hope it is Butt weld T-Joint, so you can apply normal UT also.

Regards

Jayachandran V.

On Sun, Feb 28, 2016 at 1:01 PM, Mohammed Ghani <ghani386@gmail.com> wrote:

This message is eligible for Automatic Cleanup! (ghani386@gmail.com) Add cleanup rule | More info

Dear experts,

I want to locate Fillet weld cracks below 6 mm for 22 mm plate with double V  preparation.
Is there any special techniques from NDT I can use to identify cracks below 6 mm.

Please suggest me if any suitable NDT procedure for this. It is a bit urgent. 

Appreciate your respond.

Regards,
Mohammed ghani.

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RE: [MW:24401] Fillet weld cracks below 6 mm with suitable NDT.

How u know crack is exactly 6mm below??

quite interesting.
Do RT.

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RE: [MW:24403] Fillet weld cracks below 6 mm with suitable NDT.

Dear,

Thanks for the reply.

This is for RIG spudcan crack found after 3 years in service. .. I need to rectify if any more possible cracks available in fillet joints... usually with MPI we could locate cracks upto 5 to 6 mm...

Please prove me more suggestions.

Regards,
Mohammed ghani.

On 28 Feb 2016 17:18, "'Agustin Jimenez' via Materials & Welding" <materials-welding@googlegroups.com> wrote:

Hello

I recomend Phased Array ultrasonic technic.

Agustín
Level 2 VT PT MT UT RT


Enviado desde mi smartphone Samsung Galaxy.

-------- Mensaje original --------
De: Mohammed Ghani <ghani386@gmail.com>
Fecha:28/02/2016 04:31 AM (GMT-04:30)
Para: materials-welding@googlegroups.com
Cc:
Asunto: [MW:24396] Fillet weld cracks below 6 mm with suitable NDT.

Dear experts,

I want to locate Fillet weld cracks below 6 mm for 22 mm plate with double V  preparation.
Is there any special techniques from NDT I can use to identify cracks below 6 mm.

Please suggest me if any suitable NDT procedure for this. It is a bit urgent. 

Appreciate your respond.

Regards,
Mohammed ghani.

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RE: [MW:24399] REPAIR OF METAL LOSS BY COLD WELD (BELZONA)

API 570, API 510

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Mohd Siraj
Sent: Sunday, February 28, 2016 1:56 AM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: Re: [MW:24397] REPAIR OF METAL LOSS BY COLD WELD (BELZONA)

As per API570 &510,
Reapir depend on thickness measurement.

permenant repair shall be done by flushing plate welding/hollow cylinder.

Temporary leak can b arrested by leak clamp.

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RE: [MW:24399] Fillet weld cracks below 6 mm with suitable NDT.

Hello

I recomend Phased Array ultrasonic technic.

Agustín
Level 2 VT PT MT UT RT


Enviado desde mi smartphone Samsung Galaxy.

-------- Mensaje original --------
De: Mohammed Ghani <ghani386@gmail.com>
Fecha:28/02/2016 04:31 AM (GMT-04:30)
Para: materials-welding@googlegroups.com
Cc:
Asunto: [MW:24396] Fillet weld cracks below 6 mm with suitable NDT.

Dear experts,

I want to locate Fillet weld cracks below 6 mm for 22 mm plate with double V  preparation.
Is there any special techniques from NDT I can use to identify cracks below 6 mm.

Please suggest me if any suitable NDT procedure for this. It is a bit urgent. 

Appreciate your respond.

Regards,
Mohammed ghani.

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For more options, visit https://groups.google.com/d/optout.

[MW:24396] Fillet weld cracks below 6 mm with suitable NDT.

Dear experts,

I want to locate Fillet weld cracks below 6 mm for 22 mm plate with double V  preparation.
Is there any special techniques from NDT I can use to identify cracks below 6 mm.

Please suggest me if any suitable NDT procedure for this. It is a bit urgent. 

Appreciate your respond.

Regards,
Mohammed ghani.

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Re: [MW:24397] REPAIR OF METAL LOSS BY COLD WELD (BELZONA)

As per API570 &510,
Reapir depend on thickness measurement.

permenant repair shall be done by flushing plate welding/hollow cylinder.

Temporary leak can b arrested by leak clamp.

--
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Re: [MW:24397] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

Hope you hv already mentioned this in ITP and hv approval of client, AI etc.

Rgds

Prakash Gotimukul

ASME AIS, Technical Manager ASME/ISO/PED

 gprakash31@gmail.com.

Tel: +9714 2778511 Mob:+97152 979 5678

On Sun, Feb 28, 2016 at 9:45 AM, Mohammed Ghani <ghani386@gmail.com> wrote:

Dear,

You can use any welding procedures at site as per difficulties,  subjected you shall provide an approved WPS/PQR  for that thickness limit..

Regards,
Mohammed.

On 27 Feb 2016 10:02, "Prasad" <prsgne@gmail.com> wrote:

Dear welding experts,

We are manufacturing heavy wall vessels for H2 service.

MOC SA 516 Gr 70. Thick 56 mm

Due to large size vessels are to be supplied in two sections.

Hence on site weld joint will have to be done at place of installation.

At shop we are using SAW process for welding.

At field rotating is not possible and we want to use SMAW process.

Our client is asking us to use SAW process for field weld joint also.

We know that SAW is semi automatic & more productive process.

My question is whether is their any restriction to use SMAW process.

Request experts to give their valuable views to convience client technically.

Best regards,

Prasad Ghanekar

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Re: [MW:24394] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

Dear,

You can use any welding procedures at site as per difficulties,  subjected you shall provide an approved WPS/PQR  for that thickness limit..

Regards,
Mohammed.

On 27 Feb 2016 10:02, "Prasad" <prsgne@gmail.com> wrote:

Dear welding experts,

We are manufacturing heavy wall vessels for H2 service.

MOC SA 516 Gr 70. Thick 56 mm

Due to large size vessels are to be supplied in two sections.

Hence on site weld joint will have to be done at place of installation.

At shop we are using SAW process for welding.

At field rotating is not possible and we want to use SMAW process.

Our client is asking us to use SAW process for field weld joint also.

We know that SAW is semi automatic & more productive process.

My question is whether is their any restriction to use SMAW process.

Request experts to give their valuable views to convience client technically.

Best regards,

Prasad Ghanekar

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Re: [MW:24395] RE: 24355] Impact Test & cooling Rate-Preheating (carbon steel)

When dealing with thick sections of fine grain structural steels, the welding engineer shall consider that although low cooling rate is favorable for impact toughness (especially HAZ toughness) but preheat is also required to reduce the residual stress as a result of high volume of the weld metal and reduce the risk of cracking especially on fist layers.

On one hand, a minimum preheat temperature is required (especially for fist layers) to prevent cracking and on the other hand, the heat input and interpass temperature shall be kept under a certain level to ensure coarse grain structure will not form (especially at HAZ).

Ramin  Kondori

Sr. QA/QC & Welding Engineer

-----------------------------------------------------------

PG-Dip. in Welding Engineering (IWE  AT  0070)

BSc. in Civil Engineering (IUT)

BGAS Painting Inspector

ASNT Level I&II

                        

On Sat, Feb 27, 2016 at 8:21 PM, 'Shashank Vagal' via Materials & Welding <materials-welding@googlegroups.com> wrote:

One more addition to Alan's good comment:

In case of lower thicknesses, the cooling rate tends to increase and may lead to martensite formation. But it is not so slow and sustained a cooling rate as to promote grain growth/reduced ductility, as you are allowed to weld between preheat & interpass temperatures.

 

BR,

Shashank C Vagal 

---

From: Alan Denney <alan@denney1.freeserve.co.uk>
To: materials-welding@googlegroups.com
Sent: Tuesday, 23 February 2016 2:59 AM
Subject: [MW:24358] RE: 24355] Impact Test & cooling Rate-Preheating (carbon steel)

For structural steels and pipeline steels (carbon and carbon-manganese steels) the preheat requirement increases with combined thickness. See EN 1011:Part 2. The objective is to slow the cooling rate to prevent the formation of martensite which is hard and brittle and susceptible to hydrogen cracking.

 

Alan Denney

AKD Materials Consulting Ltd

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Mohd Siraj
Sent: 22 February 2016 09:22
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:24355] Impact Test & cooling Rate-Preheating (carbon steel)

 

Dear all,

 

Background: 

impact testing is more critical for less(low)thickness than higher thickness.

 

Reason  : 

fine grain form during fast cooling and course grain form during slow cooling.

 

Question is:

Preheating use to lower the cooling rate for higher thickness.

So lower the cooling rate means form the course grain,course grain lower the toughness.

 

Preheating contributing to lower the toughness?

 

 

 

 

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