Skip to main content

[MW:1160] Reducer

By Materials & Welding

Dear Lukas,

I am afraid no one is able to understand the arrangement you are talking about. May be a hand sketch could help.

Secondly, assuming, you are talking about a multiple connection on a header pipe. And all connections are like a cross tee connection. But as it looks you are using a plate fab. reducer to replace the conc. red. Definitely you have to consult your stress engineer if you are replacing with a diff. thickness item being a steam line.

And if standard(bought out item) cross tee is not used and if you are going to use a reinforced stub-in/out connection, it is not 100% in acc. with B31.1 or 31.3 because it is a little complicated branch connection and the final verfication has to be in acc. with ASME IX as the branching is in opp. sides.

With regards,
Kannan



<Nialel.Lukas@lglgold.com>
Sent by: materials-welding@googlegroups.com

18/09/2008 02:49

Please respond to
materials-welding@googlegroups.com
To
<materials-welding@googlegroups.com>
cc
Subject
[MW:1135] Reducer





Hi
 
Can anyone advise if it is possible to use a 250 x 150 eccentric reducer with wall thickness of 11mm in place of a 250 x 150 concentric reducer, BW A234-WPB, SCH STD on CS1 Pipe ASTM 106, on a geothermal steam branch? From a well head, the branch of DN150 feeds DN250 to a 250 x 200 Straight Tee BW234-WPB, SCH STD as a junction with another DN250 –DN150 line to a well head and the DN250 Steam header feeding DN300 line eventually. Is it possible to use this eccentric reducer as per ASME IX and B31.1 Welding Code?
 
You explanation or suggestion will be highly appreciated.
 
N.Lukas
Meachnical Engineering - Piping --~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---

Comments

Post a Comment

Popular posts from this blog

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

By Materials & Welding
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...
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

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