Skip to main content

[MW:27151] RE: 27147] FFS LEVEL 3

By Materials & Welding

Ali,

Level 3 assessment is the ultimate analysis for any fitness for service assessment & involves FEA(Finite Element Analysis). Many of the preliminary issues related to crack or crack like damages could be assessed by Level-1 & Level-2 assessment as described in API-RP-579.

 

In fact most scientific & logical  way is to :

·         Start Level-1, if the damage mechanisms surpasses the provided limits

·         Then go to level 2

·         If the damages are beyond the scope of level-2,

·         then go for the final level, level-3

 

All these  levels & required steps are clearly specified API RP 579.

 

There're many proprietary software available in the market, e.g. TWI-Crackwise, Signal FFS, and many more. A search in google will reveal that. Softwares are expensive, easily upwards of $ 5000 USD to install and annual license fees of $ 1000 or more to get the updates.

 

However a word of caution "NOT ALL SOFTWARES DELVER WHAT'S ADVERTISED". The accuracy level differs. A simple calculation by two competitive software would reveal the differences. However you need qualified personnel to assess those. If required get the demonstration/trial software first and then make up your mind.

 

I was categorically educated about these  during the FFS training , which I took in Cleveland on July, 2006.

 

Hence one may have to exercise the options of both manual and FEA for API 579 FFA, as and when required.

 

Thanks.

 

 

P.Goswami.P.Eng, IWE.

Independent Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ali Asghari
Sent: December 8, 2017 2:44 AM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:27147] FFS LEVEL 3

 

Dear All.

 

1.Does anybody have any knowledge and experiences about doing of level 3 of F.F.S for crack and fatigue damage mechanism?

2.which soft wares recommended and is better for analyses based on part 5 of ASME SEC VIII DIV II,predicting of crack growth rate,....?

 

Regards.

 

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.


Virus-free. www.avg.com

Comments

Post a Comment

Popular posts from this blog

Materails FAQs

By Materials & Welding
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...
21 comments
Read more

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

By Materials & Welding
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...
Post a Comment
Read more

Re: [MW:10788] ON PLOT PIPING & OFF PLOT PIPING

By Materials & Welding
Piping systems involved for the flow lines and gathering lines from the well head isolation valve to the production facility or processing plant isolation valve are determined as OFF PLOT. ON PLOT defines piping system in the processing plant and production platform. ANSI/ASME B31.4 applies for off plot piping system. B31.4 allows the use of either API 1104 or ASME section IX (as appropriate). However, occasionally, a very small system such as piping within 500 feet of a processing plant (some client also said 400 feet) may be declared B31.3 rather than B31.4. When B31.3 is invoked, only ASME Section IX is used. before you decide which code to use for welding procedure and/or welder qualification for pipe welding, you have to know the design and construction code applicable to the system. Please read far enough into scope and diagram illustrating the application of either B31.3 and B31.4 hope this helps rgds 2011/4/21 pradip kumar sil < pradipsil@gmail.com > Dear all, ...
Post a Comment
Read more