Skip to main content

Re: [MW:25807] Longitudinal Weld overlay

Hi!
Generally petrochemical Ind spec
Allows logngitudinal overlay in pipe smaller than 50mm ID

 However
I)For pipe ID overlay in longitudinal way causes more distortion compared to circumferential O/lay
ii)Longitdinal O/L =difficult to maintain uniform ID after overlay hence some time recommended  to machine the ID to  achieve uniform overlay thk in pipe
Regards
Hegde


On Thursday, 8 December 2016 5:17 PM, ABHISHEK SINGH <mech.abhi17@gmail.com> wrote:


Dear experts,
      Anyone know why some of the client not allowed for overlay in longitudinal direction in nozzle I. D, PIPE I.D,Elbow I.D. Is there are any technical reason??

--
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
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.
---
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 post to this group, send email to materials-welding@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/50260987-8d03-46b7-b90a-e5e9a8d29f9f%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.


Comments

Popular posts from this blog

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...

[MW:36169] Cold Bending Qualification

Dear Experts,  Can anyone share the inspection requirements or a qualification procedure for cold bending? Our client spec states only the requirements for induction bending and would like to know your opinion on the cold bend inspection requirements. The code of construction is B31.3, Max. 5D bends, A106 SS 316L.  Thanks in Advance. -- 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 visit https://groups.google.com/d/msgid/materials-welding/1be61cc3-e9c9-4a5f-834d-e8485e248432n%40googlegroups.com .

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...