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Dear 3DDave Will you give me more details about your experience such as Size of diameter and thickness and year built caused by UV exposed where about

Dear any concerned people Recently one Acrylic storage tank fractured in size of 4m diameter(thk 50mm), 5m height this was built 12 years ago. Several expert say that this would be caused by Seismic load in value of richter scale 3.0 at that time. And Acrylic degradition for lomg time since this...

Dear All, My thread was moved to this from others because sufficient answer was not coming out. I'm always confused to give available stiffener distance as attached sheet. Case 1, Case 2, Case 3 for this three case of that Roak's formulas may be applied for each condition. However I want to know...

Dear Sir, Let me explain more details about Roak's formulas related Rectangular storage tank, As you know, Roak's formulas has various condition over fixed, free for each Long side and short side. However, this rectangular is of storage tank has hydro static head and Fixed side is not gived...

Hi, Concerned person Recently, I surprised when I heard of happening welding crack in area of stainless steel since about 3 years of S.Steel welding in small size of 2-1/2" When I review technical specification in feed water line where pressure is less than 50 psi. it allowed to install pipe...

Hi, Dir This is little bit different with structure condition of that is fixed side for each connection against side plate of rectangular tank, that's why I confused with this. Kind regards, ChangMyong

Hi concerned person When I review maxinum available stiffener distance in horizontal direction of rectanglar tank calculation, I always confuse in appliing factor "α" of roak's formulas which one is correct at attached sample case. Kind regards, Ryu changMyong...

Appendix 12 is rule for Non-circular header.

Dear Jano6924 Header configuration is circular type not rectangular. Gernerally in HRSG, this header shall be calculated by SEC. 1 However, I was requested it to comply with Div.1 UG53 So I wonder that this is correct

Dear sir, I want to know correct applied rule for AFC(Air Fin Cooler) There is fin tube connected between two tube header, As I know this header thickness calculated by ASME SEC.1 not for ASME SEC.VIII Div.1 however, tube ligament efficiency calculation is shown on UG 53 in DIV.1 I wonder which...

Dear ALL I need to get strength calculation of 10" header pipe attaching 1" tube, which rule should be applied for this calculation.

Dear ALL One of the Drag chain conveyor installed 2 year before, but recently guide rail connecting scraper to chain with bolting weared and runned away, this guide material is ASTM A36, steel structure material, could you tell me what is the problems. is it problems in material. and what...

Dear georgeverghese and hacksaw I agree with Tube vibration where located near to Drain nozzle because of two phse flow especially and it is very sensitivity in a phase changes of condensated flow into Drain outlet. So what is the way to prevent tube vibration, I guess that additional support...

Dear ALL What I want to know is why SCC happen at 3 pass, 4 pass only over 2nd baffle from tubesheet.

Dear georgeverghese Tube leakage occured at 3 pass and 4 pass over tube bundle from 2 nd baffle not for tubesheet joint.

Dear ALL Additionally, let me show you more information regarding this issue. This kind of Heat Exchanger installed similar design condition. But only this item occured SCC problems at 3 pass and 4 pass area. I want to know why this SCC occured at 3 pass and 4 pass area only I guess that tube...

Dear ALL,pls let me ask you some technical advice for tube failure in Heat exchanger as shown on attached Tube failure status. Since Heat Exchanger operation in 2001 year, for 15 years Tube failure occurred in drain outlet where located between Tube sheet and 2ND baffle at 3, 4 pass area...

For information, Let me show you Lab inspection data as attached file. Most of Tube damage occured 3 Pass and 4 Pass area at condensate Drain nozzle where rear tube sheet to 2ND baffle especially, this is issue why this area damaged rather than other zone. at the moment, this is related to...

Dear sir, pls let me ask you some technical advice for tube failure in Heat exchanger. as shown on attached Tube failure status. I would like to know that why 8~10 q'ty yearly tube failure occured in 3, 4 pass area near by Condensate drain nozzle that is by 2nd baffle from Tube sheet...