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Thursday, February 23, 2017

[MW:26124] Re: Regarding 2% sensitivity in radiography film.

Gent's.

With X- Ray its is Easily u can Achive the 2% Senstivity in 1" (Give 24" SFD" and to Calculate the 2% Sensitivity SE - 94 use he formula - Achieved wire thickness / Estimated Thickness including Reinforcement Thickness * 100. 

Imtiyaz.


On Tuesday, 10 January 2017 11:43:00 UTC+5:30, Prasad Rode wrote:
Dear sir,

I have 1" s.s. pipe having thkness of 4.1mm. We have used x ray quality with D4 size film. We have shown the client, required IQI as per sec V.

But client wants 2% sensitivity as per specification.

Sensitivity= min thk of visible wire/ thk of base metal*100

In our case, sensitivity= 0.20/4.1*100.      
So, it will come as 4.84 % .

So, how we will get 2% sensitivity.

Regards
Prasad

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Wednesday, February 22, 2017

[MW:26120] CAN ANY BODY TELL ME THICKNESS VS IQI SELECTION

CAN ANY BODY TELL ME THICKNESS VS IQI SELECTION

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Re: [MW:26120] About GMAW , metal transfer technique recognition

 Only using an oscillograph you can ind out if you are in the short-circuit transfer mode. Check those links:
As a "general rule"
Typical A range: 30-200 A
Typical V range: 16-22V
wire diameter: below 1,2 mm
Heat input low, risk of lack of fusion 
      
Ho                  The above is only indicative. Only the oscillograph can tell you the trough           

2017-02-20 10:51 GMT+02:00 Kannayeram Gnanapandithan <kgpandithan@gmail.com>:
Arc Voltage less than 21v  is a short circuit/Dip transfer mode

THANKS & BEST REGARDS,
KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,
CONSULTANT-WELDING & QUALITY
Mobile no: +919940739349

On Sun, Feb 19, 2017 at 10:16 PM, Prasad Rode <purode333@gmail.com> wrote:
Boxbe This message is eligible for Automatic Cleanup! (purode333@gmail.com) Add cleanup rule | More info

Dear sir,

All of we know that in GMAW process, there are three metal transfer techniques.
1) spray transfer.
2) globular transfer
3) short circuiting.

We know that, as per different temperature, voltage and with different shielding gases also, different technique generated.
But, on site and in practicality, how we come to know that welder is using which type of technique.

Regards
Prasad

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Dr. Georgios Dilintas,
Dipl. Ing. In Aeronautic and Space Engineering
Ph.D in Mechanics of Solids - Computational Mechanics
A.I.S, A.N.I, IRCA Lead Auditor
Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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Re: [MW:26120] NER and Vacuum for cryogenic tank

Evaluation or Evaporation?

2017-02-20 12:35 GMT+02:00 rbenadjal@avl.sonatrach.dz <refazosaris@gmail.com>:

Good morning every body,

Following your knowledge and your experience, please advise me how to determine the nitrogen evaluation rate (NER) for the cryogenic tank.

My question:

-          Is there any code to control the NER?

If no code any procedure or specification on the subject would be appreciated.

Also, following the Manufacture's Data Report for the tank, the acceptance standard maximum is 150 mtorr for 72 hours. Is this value (150 mtorr) mentioned in the codes and standard or just manufacturer's standard?

Thanks in advance.

 

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Dr. Georgios Dilintas,
Dipl. Ing. In Aeronautic and Space Engineering
Ph.D in Mechanics of Solids - Computational Mechanics
A.I.S, A.N.I, IRCA Lead Auditor
Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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Re: [MW:26120] welding positionpp

It seems 4F to me

2017-02-17 8:10 GMT+02:00 Umar Daraz Khan <udkhan@gmail.com>:
Dear
I have attached the photos showing position of joint
Regards
Umar Daraz Khan

On Feb 15, 2017 3:19 PM, "VISHNUDAS MAVUNKASHERY" <36vishnudas@gmail.com> wrote:
attaching a photo of joint will b appreciated


On Mon, Feb 13, 2017 at 8:28 PM, Aslam Khan <aslamkhan4u@gmail.com> wrote:
Dear experts,
I have to weld one plate which is on the top of shell plate which is fillet joint,
Which welding position we have to choose 4 G or 4 F, 
2nd it is not completely 4F,  it is like 3 F.

your quick response will be highly appreciated.

Regards
aslam

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VISHNUDAS MURALI MAVUNKASHERY

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Dr. Georgios Dilintas,
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Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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