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Thanks metengr, I understand it means metal temp but these metals can heat up significantly under a hot sun over the course of a day therefore rendering this material unuseable for a lot of countries. I don't understand as A320 B8M is often specified in Oil & Gas industry. Anyone got any...

All, Does anyone know why ASME VIII-1 puts a max temperature limit of 100F (38oC) on ASTM A320 B8M Class 1? Does this mean these bolts cannot be used in countries where temperatures can reach 40oC or where the black bulb temperature can reach much higher values? Any thoughts on the correct...

All, Apologies if this has been covered elsewhere but I could not find it, I have an ASME VIII A516 Gr70 unlined vessel and have been requested to weld in some 316L internals (baffles, weirs). The internals are not pressure retaining. The internals and their connections are small relative to...

All, I have a Flare Knock Out Drum with DT of 150oC but I have some steam coils coming into the boot of the vessel at 245oC. The temp of the fluid in the boot is not allowed to exceed 90oC before shut-off however the nozzle attached to the steam coil could theoretically reach 245oC. What is...

Hello, I have and offshore topside application using Y.S=355N/mm2 rolled sections to DNV. There seems to be contradicting guidance on the required Impact testing between DNV-OS-E201 and DNV-OS-C101. Any help would be appreciated. Cheers, JohnOD

All, We were in the process of developing some pipe specs when we found numerous references to A105N material for use in forgings. Yet we couldn't find it on the ASTM website or ASME Codes (ASME IID, B31.3). There it is called A105. It probably means the forgings are normalised but what do...

Thanks for your replies. I'm not sure that stress iso's are as frequently used now as they once were. In today's world of interoperability between draughting/design software and pipe stressing software it can be possible to just send the text files. I appreciate that there may not be a...

Thanks for your replies. I'm not sure that stress iso's are as frequently used now as they once were. In today's world of interoperability between draughting/design software and pipe stressing software it can be possible to just send the text files. I appreciate that there may not be a...

All, Can someone let me know where and when pipe stress isometrics are used? I can understand the benefit of manufacturing Iso's or even the odd stress iso here and there. However, is there ever a need to produce the stress iso's for a whole package/project? Cheers, JohnOD

All, I have to do the Flange leakage/stress calcs for a bolted, metal-to-metal contact joint i.e. male/female flange with O-ring. My query is whether or not ASME VIII Div 1 App 1 caters for such an instance? Do I need to be concerned about Gasket Seating? I can see from Table 2-5.2 that a...

drno, Not 100% but does the graphite part of 'Tanged Graphite' refer to the filling of a spiral wound steel gasket. For example, for a typical SS SW Graphite filled gasket the m factor is 3 and the y value is 5000psi. These values are usually available in a supplier catalogue. Cheers, J O'D

MJC, I tried posting to BPV Forum also and failed anyway this isn't a mod, just first time with a Deaerator. Cheers, JOD

All, I must find reference to help design a combined support and stiffener for a 4m diameter, 15m tall deaerator tower. The support/stiffener needs to support water/packing etc. up to 40,000kgs while acting as a stiffener to the 15mm thick vessel. The vessel needs to be designed for full...

Excellent, thank you!

Thanks DSB, Yes but how do I calculate that stiffness taking in to account varying lengths / shapes? CII defaults to 1.0e12 lb/in for some reason which it calls rigid. I want to accurately define the stiffness. Cheers, JOD

Hi, Does anyone have a definitive formula for calculating the 'Stiffness' of pipe supports for use in Caesaer II's restraint definition dialogue box ('Stif'. I have used k=EA/(L^3)in the past for bending stiffness but don't know full history of this and it doesn't ring true for Major and Minor...

Thanks Nozzle Twister, Yes I am aware of the Flange Module in CII. In this module there is an option to enter an Axial Force and a Moment. These are precisely the values I am seeking to find, well, the worst case of anyway. However, with say, 15 Load combinations on a large model, to...

Thanks MJC, CII does give the results but it can take forever to pinpoint which particular Flange is most heavily loaded. I'm trying to identify highest/worst case forces and moments for each size of Flange in the piping system and then check to see if flanges acceptable under these worst...

All, Is it possible to get the specific Flange loading at joints in piping system from CII to use for comparison with Allowables? Any thoughts appreciated, Cheers, JOD

ALL, I need to a basic fatigue analysis on Vessel nozzles using PD5500 using SN curves. Do I start with the Stress range, Sr, and then get the no. of cycles or do I calculate the no. of cycles and then get the allowable stress range from the curve? Ultimately I require a suitable thickness of...