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I am currently looking at a number of rectangular vessels which have a Lv/H and/or Lv/h ratio less than 4. They were built in 1976 and I cannot seem to get it to comply with the post 1986 editions of ASME VIII Div 1. My questions are: - when did Appendix 13 first appear in ASME VIII Div 1? -...

Thanks DavidOC. I agree with your assessment. CSGWB

DavidOC I had considered that the old legislation may be playing a part in this situation with the existing fleet of vehicles. With the legislation changing only a few years ago it would make sense that this industry may not be fully aware of the change in requirements. The old legislation...

I am currently reviewing a vacuum tank mounted on the back of a truck (typical sucker truck) and trying to determine if it does or does not require design registration for use in an Australian State. The Tank is truck mounted, 16500L and capable of operation between 40kPag and full vacuum. It...

Could anyone point me in the right direction for the application of gasket forces on a high pressure Weld neck style flange with lens ring gaskets. I need to perform flange calcs to ASME VIII for the flanges and want to make sure the effects of the shape of the gasket face are taken into...

Thank You Ulyssess.

ulyssess, Thank you for your response. What is typically required for a particular material appraisal? I assume some high temperature tensiles would need to be produced. At 290C, I cannot see any issues with the micorstructure. If we were going to above 350C, then I could accept there may be...

Under EN13445 are materials not listed in Part 2 Annex 2 A able to be used at elevated temperatures (say 290C)? If so, what must be done to make them suitable? I am looking at a piece of equipment containing EN10216.1 P235 TR2, EN10025 S275 JR and EN10255 S195T. Are these compliant and if so...

BigInch, Thanks. That pretty well covers it and confirms my belief. I wasn't sure if there was another clause, table or note that said otherwise. Regards CSGWB

I have been reviewing some pipe specifications recently for 900# and 1500# natural gas service in sizes up to and including 12" and I am getting confused about minimum temperature requirements for A106B pipe. From the way I read B31.3, A106B is a curve B material and therefore should not be...

Thank you eliebl and deanc That was my undrestanding also. No - welding was not occuring on the item. All joints are threaded (buttress) which I believe leads to other issues anyway particularly on a 10" shell. Regards CSGWB

Is AISI4140 or AISI4340 acceptable for use and a pressure containing part (such as flange or cap) under ASME VIII or is it restricted to bolting (per it's equivalent ASTM A193 B7)? I am looking at a filter vessel that was assembled using API standard oilwell type componentents machined from...

Metengr, I agree that B8-2 is not ideal, particularly as it is a high pressure (2500#) situation. Unfortunately it is in an existing assembly which is failing in service. We want to determine the failure mechanism in order to rectify the problem. Regards CSGWB

Metengr, Thanks for that. I had found the Asme allowables. In this instance I am looking for yield and tensile data to assist in an FEA of a flange assembly at high temperature. Unsure why Part D doesn't list B8 Class2. Regards CSGWB

Can anyone tell me where I can find elevated temperature properties for ASTM A193 B8 Class 2 Bolting materials (2"). In particular I am looking for Yield and Tensile Information. I have looked at ASME but this material is not listed. Any assistance would be appreciated. Regards CSGWB

I am currently trying to look at determining the correct size and frequency of expansion loops in a hot oil heat tracing system designed for 572F (300C). I have done some preliminary calculations and these calculations are indicating a requirement for a relative large loop (30in (750mm) leg at...

rconnor, That is my preferred option. Unfortunately my client is apprehensive about running a casing pipe or culvert over this distance. It has a relatively large cost disadvantage, but does protect the line and permit controlled movement and more importantly allows the line to be insulated...

Biginch, Rubble reference was more to do with my fear that the concrete will break up more than anything, but you are correct in nominating good clean sand. That one goes without saying with up to 100mm of movement. Yes, underground piping is because we are running through government owned...

BigInch, I am also concerned about coating at this temperature. Most common coatings will not withstand this situation. I am led to believe that fusion bonded epoxy may be the way to go, but I haven't, as yet, looked into it. With respect expansion loops, we were looking at running the...

Zapster, Agreed that expansion joints would solve the problem, however, the process fluid (bitumen/asphalt) does not have a good track record with expansion joints. CSGWB.