Skip to main content

Re: [MW:8524] Re: Regarding Repair Calculation

Dear Raj,
 
I have a doubt, For example in a 10mm thickness job a defect of 5mm length X 3mm width noticed under 5mm depth, for repairing purpose the excavation will be more than the defective length ( approximate of  15mm length & depth 6mm X width 6mm),and also let us keep the total length of NDT completed as 250mm,at this condition what is the repair percentage. Do you will consider the defect area or excavated area,
 
With regards,
 
Balajirajajan.P
 
 
-------Original Message-------
 
From: Raj
Date: 12/5/2010 8:52:12 PM
Subject: [MW:8506] Re: Regarding Repair Calculation
 
Hi,
 
1) Percentage Repair Rate = Defective Length Repaired / Total length
of NDT completed
OR
2) Percentage Repair Rate = Number of joints Repaired / Total number
of joints NDT completed
 
Cheers!
 
Rajasekhar
 
On Dec 1, 4:38 pm, ahmed <Ah...@costaindas.ae> wrote:
> Dear Friends,
>
> I Want to know that how to calculate repair percentage for various diameter
> of pipes, any reference or Para available in Code.
>
> Best Regards,
>
> Shaikh Ahmed . k .
>
>  QA/QC Engineer
>
> COSTAIN ABU DHABI COMPANY.W.L.L
>
> (A division of Costain Oil & Gas Process Limited, Manchester, UK)
> P.O. Box no: 3069
> Abu Dhabi-Das Island
> United Arab Emirates
>
> Mobile:     +971-567090644
> * Tel:      +971-2-6063850 (Ext:216)
>
 
--
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.
FREE Christmas Animations for your email – by IncrediMail! Click Here!

Comments

Popular posts from this blog

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

Hi,  You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this.  Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime.  Again, these simulated no. Of cycles shall be specified in MTC.  The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case).  One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example.  In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...

Materails FAQs

Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...