Skip to main content

Re: [MW:33878] Re: Duplex, super duplex stainless steel repair

By Materials & Welding
It's normal with this material experience happening in Aramco different site .
You need to conduct 100% RT for but joint and conduct PT for branch connection.additionaly UT can be done .

For repair you need to conduct repair only for this as per requirement in SAES -W-16 separate repair WPS required .that repair procedure should be done full thickness repair..



On Wed, 28 Dec 2022, 11:02 Mohd Siraj, <mohd52100@gmail.com> wrote:
I will do two additional things,

1. check pickling and passivation are done properly after fabrication.
2. hydrotesting water is potable water and is clean with very clean air/dry air after the test.

The welding engineer is giving 300% attention during the fabrication which is true..but leave welding after welding and post-welding precaution is not taking place.

On Thursday, December 8, 2022 at 10:52:39 AM UTC+3 GANESH MUTHURAJAN wrote:
Good morning sir, 

Now i working with duplex and super duplex , RO plant.

How to do the repairs in this material, for example we found two segment in 10 mm  in 14 inch pipe. 

Can we do partial repair, or fully cutout and reweld.  Any code reference advice to do full cutout, or partial.

Second case this plant was handed over to the Clint, during commissioning we found leakage, not only the butt joint, even in the branch connection, 

Aramco advise to do 100 %rt butt joint and branch.

Branch we can't do RT, placing a film is deficult.  What to do in this. 

Please advise me your experience and international, Aramco code reference.


Thank you

--
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.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/4b31582d-e6de-458d-b0e0-2b07bd38e431n%40googlegroups.com.

--
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.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAHqH7yB4pWGPh3Qoy-eqp_bry11yAOD_o2ngfTKPj303UWx6Kg%40mail.gmail.com.

Comments

Post a Comment

Popular posts from this blog

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

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

The Schaeffler and Delong diagrams for predicting ferrite levels in austenitic stainless steel welds

By Materials & Welding
Introduction Ferrite is important in avoiding hot cracking in during cooling from welding of austenitic stainless steels. 'Constitution diagrams' are used to predict ferrite levels from the composition by comparing the effects of austenite and ferrite stabilising elements. The Schaeffler and Delong diagrams are the original methods of predicting the phase balances in austenitic stainless steel welds. Nickel and chromium equivalents A 'nickel equivalent' is calculated for the austenite stabilising elements and a 'chromium equivalent' ferrite stabilising elements. These are used as the axes for the diagrams, which show the compositional equivalent areas where the phases austenite, ferrite, martensite (and mixtures of these) should be present. Although intended to show the phase balance of weld fillers, these diagrams can also be used to illustrate the phase balance of the 'parent' material. There are different diagrams for dif...
Post a Comment
Read more