Materials & Welding: November 2009

Monday, November 30, 2009

[MW:3771] hydrotest b31.1

Hi,

I have a strange situation about Hydrostatic Test ......

Until now we used to let all welds of piping system no painted........

now our client read in B31.3 and open the discussion that in code is wrote that is allowed to paint the welds before hydrostatic test......

What do you think about that?????

regards

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Daniel Iordache
Bureau Veritas - Angola
Mechanical& Welding Surveyor
Mobile Ao: +244921544583
Mobile Ro: +40721731728
E-Mail: daniel.iordache@gmail.com
daniel_iordache@yahoo.com

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Re: [MW:3770] FW: CICB Painting facility and process qualification approval

Distilled water will have standard value, that has to be cross check before testing suck out water on the digital meter and you have minor calculation which is demonstrated in kit manual.

Regards,
S.Senthilkumar

--- On Sun, 29/11/09, Nilesh Pathare <patharenil@gmail.com> wrote:

From: Nilesh Pathare <patharenil@gmail.com>
Subject: Re: [MW:3759] FW: CICB Painting facility and process qualification approval
To: materials-welding@googlegroups.com
Date: Sunday, 29 November, 2009, 9:18 AM

Dear Mr. Hegde,

To do the salt test on the blasted surface and prior to blasting kit is available in market.(Bressel's kit)

There is a patch type thing which you paste on the surface. Then inject distiled water in it. Rub the patch water on the substrate. So the salt contain on the surface dissolved in water. And again suckout this water by injection. And test the salt contain with the digital instrument included in the KIT.

Best Regards,

Nilesh Pathare

NDT Level III, CSWIP BGAS painting gr.2,

Sharptest NDE & Inspection services, Mumbai.

On Wed, Nov 25, 2009 at 12:04 PM, Qamlr <qamlr@cicb-chemicon.com> wrote:

Dear All

Request your suggestions as to how we can carry out the salt contamination test on job before blasting.. If the salt is > 7 micro gram/cm, then we have to clean the entire surface with water jet .This is recommeded by our client as our manufacturing facility is close to coast.

Thanks & regards

Prashanth Hegde

Head Quality

CICB-Chemicon Pvt. Ltd

Mangalore- INDIA

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[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

[MW:3768] Ripples in Hot rolled pipes

How do ripple like defects form in hot rolled pipes and which
specification does it appear in?

Umasankar

[MW:3767] Hydrotesting of piping

Dear All,
Have a good day

Can somebody let me know where I can find the calculations for acceptance / rejection of Hydrotest when there is Pressure drop wrt Temp difference

A quick respons would be beneficial

S A Naik

[MW:3766] 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

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Re: [MW:3765] Torque calculation

Torque,in lb.ft=KDP/12

K=0.2 for finished bolts;0.22 for Zn Plated;0.3 for black;0.16 for Cd plated;0.15 to 0.18 for lubricated;0.10 for highly lubricated or waxed

D=nominal dia of bolt in inches

P=Bolt's desired load in Lbs(=75% of YSXArea)

A,area=0.7854X Square of (D - 0.9743/n)

n=no of threads pre inch;

Coarse series(UNC) 1/2=13

5/8=11

3/4=10

7/8=09

8UN series 1" onwards=8

Hope above information shall help

Regards

Aarpee

On Sun, Nov 29, 2009 at 11:45 AM, Mrityunjay Kumar / ZS Saudi PEB QA/QC <Mrityunjaykumar@zamilsteel.com> wrote:

Hi,

Good morning,

Can anybody tell me the formulae for Torque calculation (if load & area is provided for Anchor Bolts).

Thanks and Regards,

M.K.Choudhary

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RE: [MW:3764] Material selection

Hi Sachin,

Usually from the very first principles there are a few ways to avoid formation of chromium carbide at grain boundaries in austenitic stainless steels during welding :-

Use "L"grade typically C-0.03 or below
Use stabilized grades e.g 316L(Mo stabilized), 321(Ti stabilized) or 347(Nb stabilized).

Both routes are acceptable from good welding and materials design perspectives. I am not sure what is the Ferrite Level (FN)asked at the fabrication stage. As per API-582, Minim Ferrite No (FN) for 347S.S is 5 FN while for the rest it could be as low 3FN. If you start off with higher ferrite no during fabrication for 321 or 347 clad, there may be chances of forming sigma phase after prolonged exposure.

You may forward your query to UOP on the rationale behind choosing 304L clad for FCC columns.

One Note Here:-NACE RP-170-2004-Talks about Polythionic Acid SCC in Refinery Equipments during maintenence shutdowns, which includes the FCCU. Resistance to above SCC can be enhanced by certain heat treatments such as stabilising anneal during fabrication, which is more required for stablized grades e.g 321 S.S,347S.S

Appreciate your feedback.

Thanks.

Pradip Goswami,P.Eng
Welding and Meatllurgical Engr/Specialist
Ontario Power Generation Inc.

Date: Sat, 28 Nov 2009 15:47:25 +0000
To: materials-welding@googlegroups.com
Subject: [MW:3758] Material selection
From: sachin.sankhe@rediffmail.com

Dear Freinds,
I have query on below subject

We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor
However design temp of Main column is around 55o deg.C
Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries.
I feel UOP shall have specifed SS347.
Kindly share your knowledeg

Regards
Sachin

Sunday, November 29, 2009

[MW:3760] Re: Material selection

Dear Sachin,

I agree that this is the wrong material for this application because
in this temperature range you will get Chromium carbides as well as
Sigma fase present as precipitations on the grain bounderies which
will influence the clad layers corrosion resistance. The material
SS347 is a more common used metarial for high temperature application
and is also often used at power plants because of its enhanced
properties against creep. So for this aplication I would say this will
be a much better choice, but depends also on the content of the
equipment. Why did they choose 304L? When changing to 347 material you
will have material with high carbon content, is this acceptable?

Best regards,

Herman Pieper

On 28 nov, 16:47, "sachin sankhe" <sachin.san...@rediffmail.com>
wrote:
> Dear Freinds,
> I have query on below subject
>
> We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor
> However design temp of Main column is around 55o deg.C
> Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries.
> I feel UOP shall have specifed SS347.
> Kindly share your knowledeg
>
> Regards
> Sachin

Re: [MW:3761] Material selection

Dear Sachin,

I think there might be some error in drawing or data sheet. Please write to client to clarify on this and seek conformance for 304L caldding.

2009/11/28 sachin sankhe <sachin.sankhe@rediffmail.com>

Dear Freinds,
I have query on below subject

We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor
However design temp of Main column is around 55o deg.C
Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries.
I feel UOP shall have specifed SS347.
Kindly share your knowledeg

Regards
Sachin

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C. K. Purohit
Eng-Tech Weld1
Sr Welding Inspector

[MW:3762] Torque calculation

Hi,

Good morning,

Can anybody tell me the formulae for Torque calculation (if load & area is provided for Anchor Bolts).

Thanks and Regards,

M.K.Choudhary

Re: [MW:3759] FW: CICB Painting facility and process qualification approval

Dear Mr. Hegde,

To do the salt test on the blasted surface and prior to blasting kit is available in market.(Bressel's kit)

There is a patch type thing which you paste on the surface. Then inject distiled water in it. Rub the patch water on the substrate. So the salt contain on the surface dissolved in water. And again suckout this water by injection. And test the salt contain with the digital instrument included in the KIT.

Best Regards,

Nilesh Pathare

NDT Level III, CSWIP BGAS painting gr.2,

Sharptest NDE & Inspection services, Mumbai.

On Wed, Nov 25, 2009 at 12:04 PM, Qamlr <qamlr@cicb-chemicon.com> wrote:

Dear All

Request your suggestions as to how we can carry out the salt contamination test on job before blasting.. If the salt is > 7 micro gram/cm, then we have to clean the entire surface with water jet .This is recommeded by our client as our manufacturing facility is close to coast.

Thanks & regards

Prashanth Hegde

Head Quality

CICB-Chemicon Pvt. Ltd

Mangalore- INDIA

Please don't print this e-mail unless you really need to.
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Saturday, November 28, 2009

Re: [MW:3763] Material selection

In my opinion low carbon content of SS304L will help in avoiding carbide precipitation.

best regards.

Sunil Mathur

On Sat, Nov 28, 2009 at 7:47 PM, sachin sankhe <sachin.sankhe@rediffmail.com> wrote:

Dear Freinds,
I have query on below subject

We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor
However design temp of Main column is around 55o deg.C
Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries.
I feel UOP shall have specifed SS347.
Kindly share your knowledeg

Regards
Sachin

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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.

[MW:3758] Material selection

Dear Freinds,
I have query on below subject

We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor
However design temp of Main column is around 55o deg.C
Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries.
I feel UOP shall have specifed SS347.
Kindly share your knowledeg

Regards
Sachin

Re: [MW:3757] Welding of SA 537

Hi!KC
use the following process:for qlfn of pqr
GTAW (root) :ER 80S-Ni1
SMAW :E7018-G

PWHT as per UCS-56 ASME Sec VIII Div 1

After qulaification of PQR & WPS FOLLOW ug-84 for PTC requirements
Rgds
VG

On Thu, Nov 26, 2009 at 4:02 PM, KC <kc.chavda07@gmail.com> wrote:

Can anyone tell me to weld the below material with SMAW which
electrodes we have to use , to weld with SAW which filler wire & flux
combination we have to use.
The material and test requirement is as below…

 Material is SA-537 Class 1, Fully Killed, Normalized, Charpy V-
Impact Tested
 Material is SA-516 Gr.70, Fully Killed, Normalized
 Thickness varies from 38 mm to 50 mm for both materials.
After complication of welding we have to test PTC (production test
coupon) @ -48˚C (Negative 48). The impact energy value shell be 50
joule.

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Re: [MW:3756] FW: CICB Painting facility and process qualification approval

Hi!
Prashant
Please wash the steel surface & blast to obtain the required surface roughness.
Then do salt test using Bressel's kit(it cost roughly 2000 dhirams).

Thanks & Rgds
Vg

On Wed, Nov 25, 2009 at 12:04 PM, Qamlr <qamlr@cicb-chemicon.com> wrote:

Dear All

Request your suggestions as to how we can carry out the salt contamination test on job before blasting.. If the salt is > 7 micro gram/cm, then we have to clean the entire surface with water jet .This is recommeded by our client as our manufacturing facility is close to coast.

Thanks & regards

Prashanth Hegde

Head Quality

CICB-Chemicon Pvt. Ltd

Mangalore- INDIA

Please don't print this e-mail unless you really need to.
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*******************************************************************
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[MW:3755] Automatic scanner for performing TOFD

Dear All,
As you all know that TOFD needs a scanner. Can you pl.help me in identifying the best automatic motorized scanner for the same. We are using Veritech Sonomatic make Microplus 2 model TOFD machine. I believe that the scanners can be made compatible for any machine.

Regards,
Raghavendra

Larsen & Toubro Limited
www.larsentoubro.com

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Re: [MW:3754] Re: Pickling and Passivation

Flushing with abundant DM water is essential for cleaning after pickling and passivation.The presence of acid stains can be tested with litmus paper.
regards
M.S.R.K.Srinivasa Prasad
Sr. Manager( Mech. Maint PP-1)
Nagarjuna Fertilizers And Chemicals
Nagarjuna Road
KAKINADA-533003
Ph: 0884-2360212(O)
2379302(R)

Friday, November 27, 2009

Re: [MW:3753] Re: Pickling and Passivation

Dear Mr. Salvador

It is essential to clean the pickled and passivated (Acid cleaned) surface thoroughly by flushing with water. Thereafter you may check the presence of acid using litmus paper. The suface should be clean and free from any embedments and rust.

Regards

Gopu

--- On Wed, 25/11/09, Salvador, Camilo <cafsss@gmail.com> wrote:

From: Salvador, Camilo <cafsss@gmail.com>
Subject: [MW:3742] Re: Pickling and Passivation
To: "Materials & Welding" <materials-welding@googlegroups.com>
Date: Wednesday, 25 November, 2009, 4:21 PM

How can i ensure that there's no residual acid on the surface? Visual
inspection?
What's the best method of cleaning post passivation?

Most part of procedures are based on ASTM A-380, but this standard
doesn't give us details about the "accept criteria" of passivation.

Regards,

On Nov 24, 4:43 am, "Bathula Raghuram (Mumbai - PIPING)"
<R.Bath...@ticb.com> wrote:
> Done mostly for hygienic/aesthetic reasons, however a fine surface
> finish is also crucial to corrosion resistance. SS is protected by a
> thin chromium oxide layer mainly taking O2 from atmosphere. But during
> fabrication this self healing layer is disturbed due to mechanical work
> (grinding, welding, cutting etc.) and reduce resistance to local
> corrosion.
>
> The after treatment (pickling/passivation) will be determined on
> various factors, corrosion resistance of steel grade, corrossivity of
> the atm, hygienic condition aesthetic appearance etc.
>
> Scale or heat tint formed during welding required to be removed, hence
> recommended mostly for welds only; assuming the rest of base material
> passive layer is intact. Pickling is de scaling, cleaning process
> before passivation.
>
> ________________________________
>
> From: Agrawal Sunil (Mumbai -Stequ)
> Sent: Tuesday, November 24, 2009 11:33 AM
> To: materials-welding@googlegroups.com
> Subject: Pickling and Passivation
>
> Regard to Process Static Equipments, when it is necessary to carry out
> Pickling and passivation. If we don't do pickling and passivation, how
> it is going to effect the product when put in service?
>
> Sometime, only pickling and passivation is carried out only for weld
> portion, why it is so? Also sometime only pickling is carried out.
>
> Request to for guidance on above.
>
> Thank you,
>
> Sunil Agrawal
>
> Tecnimont ICB/ STEQU
>
> Filtered by Hosted Filtering

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Thursday, November 26, 2009

Re: [MW:3752] Welding of SA 537

E7018-1 with low hydrogen can do the job

Dr. G. Dilintas
I&F Regional Technical Manager
Bureau Veritas Piraeus - Greece
Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118

RE: [MW:3751] Welding of SA 537

SMAW

Air Liquide/Oerlikon Tenactito 38R for SMAW (E7018-G)
Air Liquide/Oerlikon SD3 Wire/ OP121TT Flux for SAW

Excellent low temperature impact test properties with 450MPa yield approx.

Regards
Robert

-----Original Message-----
From: KC [mailto:kc.chavda07@gmail.com]
Sent: 26 November 2009 12:03
To: Materials & Welding
Subject: [MW:3750] Welding of SA 537

Can anyone tell me to weld the below material with SMAW which
electrodes we have to use , to weld with SAW which filler wire & flux
combination we have to use.
The material and test requirement is as below…

 Material is SA-537 Class 1, Fully Killed, Normalized, Charpy V-
Impact Tested
 Material is SA-516 Gr.70, Fully Killed, Normalized
 Thickness varies from 38 mm to 50 mm for both materials.
After complication of welding we have to test PTC (production test
coupon) @ -48˚C (Negative 48). The impact energy value shell be 50
joule.

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[MW:3750] Welding of SA 537

[MW:3749] Pitting on SS410 Clad on LAS base metal

How to prevent corrosion and pitting on above clad material.
Is there any standard ( ASTM) for visual inspection of clad material.?
Is it allowed to repair the corroded area on the clad in the above material which is bonded to base metal by hot roll bonding process.

Pl.explain along with your experience while handling this material.

Thanks for your time and efforts.

Regards,
Raghavendra

Larsen & Toubro Limited
www.larsentoubro.com

RE: [MW:3748] ASME B31.3 unlisted materials

In general : check requirements towards weld metal for AISI 4130 joints : strength , hardness, charpy values

In oil industry you can have requirements for high strength where B2 will fail.

In oil industry you will have probably Nace requirements (max 22HRC) : you will need high PWHT temp to reduce HAZ hardness.

Chary values at -46degrC ..?

AISI 4130 base metal can be ordered and supplied with high strength levels.

With kind regards,

Erwin GERING

Van: pgoswami@sympatico.ca [mailto:pgoswami@sympatico.ca]
Verzonden: dinsdag 24 november 2009 23:29
Aan: materials-welding@googlegroups.com
Onderwerp: FW: [MW:3727] ASME B31.3 unlisted materials

Hi John,

I have attached a spec for 4130 steel FYI. The summarized details are as follows:-

§ ASTM 519 Gr 4130—Nearest ASME Sec IX P No- 4. (typically 1.00- 1.25 Cr, 0.5% Mo)

§ Welding Consumables–SMAW –E-8018 B2 or 7018-B2L , GTAW-ER-80S-B2

§ PWHT—Follow PWHT requirements for P4 materials as asked by B 31.1 code (Table 331.1.1).

§ Recommended PWHT cycle should be , Soaking Temp-1300-1375⁰F, Soaking Time -1 Hr/inch of thickness, Minimum soak time –1 hr

§ Targeted hardness 225 BHN Max.

Since this material is not listed in B-31.3, proper design evaluation, stress analysis (if required) should be done prior to use. Follow the guidelines of B-31.13 code for the same.

You may find the guidelines of ASME 31.3 code on the use of unlisted materials, as mentioned below.

Hope this would be of help to you.

Thanks.

Pradip Goswami,P.Eng

Senior Engineer/Specialist(Welding-Metallurgy)

Machine Dynamics & Component Integrity Dept.

Engineering & Training Services Division

ONTARIO POWER GENERATION Inc.

PO Box-2000, RR-55(South)

Nanticoke, Ontario,N0A1L0

Tel:-(519) 587-2201, Ext 3107--in Nanticoke

(416) 231-4111, Ext 5925--in Kipling,Toronto

Fax: (519) 587-6814

Email-pradip.goswami@opg.com.

Unlisted Materials. Unlisted materials may be used provided they conform to a published specification covering chemistry, physical and mechanical properties,

method and process of manufacture, heat treatment, and quality control, and otherwise meet the requirements of this Code. Allowable stresses shall be determined in accordance with the applicable allowable stress basis of this Code or a more conservative basis.

Unlisted Materials. An unlisted material, shall be qualified for service at all temperatures within a stated range, from design minimum temperature to design maximum temperature.

From: j.lock@pacificdrilling.com
To: materials-welding@googlegroups.com
Date: Mon, 23 Nov 2009 15:27:23 -0800
Subject: RE: [MW:3717] ASME B31.3 unlisted materials

The material is ASTM 519 Gr 4130

Best regards,

John Lock

Quality & Classification Engineer

Pacific Deepwater Construction Ltd

cid:image002.jpg@01CA4F2E.75D71400

Cellular. +82 (0)10 4693 6282

Office Tel. +82 (0)55 631 9071

Office Fax. +82 (0) 631 7499

E-mail j.lock@pacificdrilling.com

P Before printing I think about the environment

From: pgoswami@sympatico.ca [mailto:pgoswami@sympatico.ca]
Sent: Friday, November 20, 2009 10:08 PM
To: materials-welding@googlegroups.com
Subject: RE: [MW:3705] ASME B31.3 unlisted materials

What is the unlisted material, could you be specific, i.e. could you please provide specification or composition etc.

Thanks.

Pradip Goswami,P.Eng
Welding & Metallurgical Engineer/Specialist.
Ontario Power Generation Inc.
Toronto, Canada.

> Date: Thu, 19 Nov 2009 23:43:10 -0800
> Subject: [MW:3695] ASME B31.3 unlisted materials
> From: jjlock53@gmail.com
> To: materials-welding@googlegroups.com
>
> Should PWHT requirements for the materials type be followed for
> unlisted materials i.e. no P or S number?
>
> --
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> To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
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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.

THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.

Wednesday, November 25, 2009

Re: [MW:3747] NDT procedure qualification

Hrishi

To make it simple . ASME had introduced mandatory Procedures
Qualifications for NDE in 2007 . These will have Essential variables
akin to WPS in Welding

Although Industry still did not get into this groove

you may find the same in clauses referred by Pradip

Regards

Satish Kumar

On 11/24/09, K.M Hrishikesan <hrishikm07@gmail.com> wrote:
> Is it mandatory to demonstrate NDT procedure qualification before
> applying in the actual job? If so, please give the code/standard reference.
>
> Regards
> Hrishi
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding-unsubscribe@googlegroups.com
> For more options, visit this group's bolg at
> http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.
>

Re: [MW:3745] Bolts/Nuts Material

RP,Thanks,

Any one have idea about what will be cost difference incurred for HDG & Cadmium plating.

and can we use Cadmium plating for bolts on high temp service (165ºC)

Thanks,
ohm guru namasivaya

--- On Wed, 11/25/09, Ramprasad Chari <ramprasad.chari@gmail.com> wrote:

From: Ramprasad Chari <ramprasad.chari@gmail.com>
Subject: Re: [MW:3739] Bolts/Nuts Material
To: materials-welding@googlegroups.com
Date: Wednesday, November 25, 2009, 3:15 PM

I was referring coating of HDG/Cd Plating on CS bolts only i.e.a193GRB7 and not on B8 bolts which are ss.HDG/Cd plating shall not be any issue on A193B7 bolts.

Regards

Aarpee

On Wed, Nov 25, 2009 at 11:41 AM, Ohm-Srinivasulu. K <nirgunaya@yahoo.com> wrote:

RP,

Thanks, I should not deviate from company specs, what I can do is whether to approve the vendor proposal or not.

on A193 GR. B8 HDG may not stick unless zinc penetrates the passive oxide film on SS

Does A193 Gr. B7 material can be HDG?

ohm guru namasivaya

--- On Wed, 11/25/09, Ramprasad Chari <ramprasad.chari@gmail.com> wrote:

From: Ramprasad Chari <ramprasad.chari@gmail.com>
Subject: Re: [MW:3732] Bolts/Nuts Material
To: materials-welding@googlegroups.com
Date: Wednesday, November 25, 2009, 9:26 AM

Zinc Electroplating is not a very durable/useful coating.Its thk is also around 15 microns only.Better ones are Cadmium Plating,Hot Dip galvanizing and Barium carbonate coating.

Regards

Aarpee

On Tue, Nov 24, 2009 at 6:30 PM, Ohm-Srinivasulu. K <nirgunaya@yahoo.com> wrote:

HI,

I want to clarify a deviation request from Valve vendor,

As per the client specs,

For Bolting for Bonnet, Packing-box etc

All carbon steel or low alloy steel bolting shall be zinc plated(elctro-deposited), bichromated.

but vendor is proposing

Our proposal for A216 WCC Body (Non-Sour) as follows;

Body Studs & Nuts (21000 Series): A193 Gr.B7 / A194 Gr.2H zincplated
(without chromated)
Body Studs & Nuts (35002 Series): A193 Gr.B8 CL.1 / A194 Gr.8
Gland Studs & Nuts : A193 Gr.B8 CL.1 / A194 Gr.8

so my dout is in humid areas like Japan we need the bolts to be

Zincplated/bichromated to prevent white rust and in hot areas like

Qatar its not required.

Please confirm my understanding,

(As the specs were basically developed by JGC they specified as

zinc plated/bichromated)

Ohm-Srinivas

Sr. Piping Engg.

ohm guru namasivaya

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Re: [MW:3746] NDT procedure qualification

Mr Hrishi,

Please refer ASME Sec V T-150 which is self explainatory, I trust this clarifies ur queiry

Regards,

S A Naik
ASNT Level-III (UT,RT,MT,PT,VT)
API- 570, 510, 653 Certified Inspector
ABS Group INC
Dubai

On Tue, 24 Nov 2009 18:59:16 +0530 wrote
>Is it mandatory to demonstrate NDT procedure qualification before applying in the actual job? If so, please give the code/standard reference.

Regards
Hrishi

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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.
>

Re: [MW:3743] Re: Pickling and Passivation

Visit the AvestaPolarit welding website and download the free 20 page Pickling Handbook (dont worry; it also includes Passivation & Post cleaning). You will have no questions unanswered.

Regards,

[MW:3742] Re: Pickling and Passivation

Salvador, Camilo

to:

Materials & Welding

11/25/2009 04:23 PM

Please respond to materials-welding

How can i ensure that there's no residual acid on the surface? Visual inspection? What's the best method of cleaning post passivation? Most part of procedures are based on ASTM A-380, but this standard doesn't give us details about the "accept criteria" of passivation. Regards, On Nov 24, 4:43 am, "Bathula Raghuram (Mumbai - PIPING)" <R.Bath...@ticb.com> wrote: > Done mostly for hygienic/aesthetic reasons, however a fine surface > finish is also crucial to corrosion resistance. SS is protected by a > thin chromium oxide layer mainly taking O2 from atmosphere. But during > fabrication this self healing layer is disturbed due to mechanical work > (grinding, welding, cutting etc.) and reduce resistance to local > corrosion. > > The after treatment (pickling/passivation) will be determined on > various factors, corrosion resistance of steel grade, corrossivity of > the atm, hygienic condition aesthetic appearance etc. > > Scale or heat tint formed during welding required to be removed, hence > recommended mostly for welds only; assuming the rest of base material > passive layer is intact. Pickling is de scaling, cleaning process > before passivation. > > ________________________________ > > From: Agrawal Sunil (Mumbai -Stequ) > Sent: Tuesday, November 24, 2009 11:33 AM > To: materials-welding@googlegroups.com > Subject: Pickling and Passivation > > Regard to Process Static Equipments, when it is necessary to carry out > Pickling and passivation. If we don't do pickling and passivation, how > it is going to effect the product when put in service? > > Sometime, only pickling and passivation is carried out only for weld > portion, why it is so? Also sometime only pickling is carried out. > > Request to for guidance on above. > > Thank you, > > Sunil Agrawal > > Tecnimont ICB/ STEQU > > Filtered by Hosted Filtering -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

FW: [MW:3744] NDT procedure qualification

Sorry I didn't mention, for my previous mail I refer ASME section V Edition 2007 addenda 2008
Regards

Bharat B. Gole

From: bharatgole@hotmail.com
To: materials-welding@googlegroups.com
Subject: RE: [MW:3731] NDT procedure qualification
Date: Wed, 25 Nov 2009 16:48:14 +0530

If you refer ASME V clause T522.1,T721.2 & T621.2 for UT,MT & PT respectively then you will find that when procedure qualification is specified by the referncing code section(i.e construction code...ASME VIII, 31.3 etc) , change of requirment in relevant table ( ASME V )identifed as an essential variable shall require requlification of written procedure by demonstration.

Where as per ASME V clause T 221.2 for RT - Only demonstration of density & image quality requirements as per written procedure on production or technique radiograph shall be considered satisfactory evidence of compliance of that procedure.

Suppose if you are qualifying welder by radiography then even written procedure is also not required as per QW 190 Only demonstration of density & image quality requirements on production or technique radiograph shall be considered satisfactory evidence of compliance with article 2 of section V.

I think its more clear now. If you come across with some clients specification then you may have to demonstrate the NDT procedures beside abovsaid code requiremnts.

Regards

Bharat B. Gole

To: materials-welding@googlegroups.com
Subject: Re: [MW:3731] NDT procedure qualification
From: Vinayak_Kale@lntenc.com
Date: Wed, 25 Nov 2009 08:56:06 +0530

Good Morning ,

Basically NDT procedures are drafted in line with specific codes for example ASME Sec V which is universally adopted. If client insist or raise any doubt than only we have to demonstrate

Thanks & Best Regards,

Vinayak Kale
E & C DIv. QA & I , OGSP
Larsen And Toubro Ltd
Powai , Mumbai
vinayak_kale@lntenc.com
Ph No.+91- 67053805/3685
Fax No. +91-67051988
(M) - + 91 9892743803

"K.M Hrishikesan" <hrishikm07@gmail.com> 11/24/2009 06:21 PM

Please respond to
materials-welding@googlegroups.com

To	materials-welding@googlegroups.com
cc
Subject	[MW:3725] NDT procedure qualification

Is it mandatory to demonstrate NDT procedure qualification before applying in the actual job? If so, please give the code/standard reference.

Regards
Hrishi --
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Materials & Welding

Monday, November 30, 2009

[MW:3771] hydrotest b31.1

Re: [MW:3770] FW: CICB Painting facility and process qualification approval

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

[MW:3768] Ripples in Hot rolled pipes

[MW:3767] Hydrotesting of piping

[MW:3766] SA 516 GR 70 plates-Boron content- clarification

Re: [MW:3765] Torque calculation

RE: [MW:3764] Material selection

Sunday, November 29, 2009

[MW:3760] Re: Material selection

Re: [MW:3761] Material selection

[MW:3762] Torque calculation

Re: [MW:3759] FW: CICB Painting facility and process qualification approval

Saturday, November 28, 2009

Re: [MW:3763] Material selection

[MW:3758] Material selection

Re: [MW:3757] Welding of SA 537

Re: [MW:3756] FW: CICB Painting facility and process qualification approval

[MW:3755] Automatic scanner for performing TOFD

Re: [MW:3754] Re: Pickling and Passivation

Friday, November 27, 2009

Re: [MW:3753] Re: Pickling and Passivation

Thursday, November 26, 2009

Re: [MW:3752] Welding of SA 537

RE: [MW:3751] Welding of SA 537

[MW:3750] Welding of SA 537

[MW:3749] Pitting on SS410 Clad on LAS base metal

RE: [MW:3748] ASME B31.3 unlisted materials

Wednesday, November 25, 2009

Re: [MW:3747] NDT procedure qualification

Re: [MW:3745] Bolts/Nuts Material

Re: [MW:3746] NDT procedure qualification

Re: [MW:3743] Re: Pickling and Passivation

FW: [MW:3744] NDT procedure qualification

[MW:34866] Presentation for WPS ,PQR AND WPQ as per ASME Sec IX in power point

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