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CAPM = Can't actually Project Manage. Put in the effort and get PMP, means so much more than CAPM.

Weldwonk, look out for designers of air cooled heat exchangers, the headers are rectangular. Try and find a copy of "Design of Process Equipment, 2nd Edition" by Kanti Mahajan for a design method (the third edition is available on Amazon). Regards Rudol

Thanks, I did not think there was a way out of it! Any comments on the vibration stress relieving?

The section was not fabricated into a shell section, so all welds related to the connection to the shell was not finalised. The pad, nozzle, flange was completed and the pad to 40mm floor insert was tack welded. We cannot use Appendix A due to the nozzle neck of 20mm and the floor insert of...

We have a fixed roof tank with a flush type clean out door, which is required to be stress relieved in accordance with API 650. The problem is that the tank fabricator installed the door into the tank without completing all the welds, but stress relieving was however performed on the...

We have a concrete tank foundation that is out of the flatness tolerance specified by API 650. What remedies are commonly used? We are considering a sand and bitumen layer to bring the flatness into spec, any comments? Further, due to the location of the site and availability of bitumen...

On the subject, from which date it is madatory to use Addendum 4? Thanks Rudo

Hi Thanks for the replies. The tanks is stress relieved according to the requirements of API 650 par 3.7.4. The tanks are quite big - 25m high x 34m ID and 21mm bottom strake thickness. Regards

Hi All How is acceptable hardness values determined for material/HAZ/weld metal on API 650 tanks? The material is ASTM A 516 Gr 70 and PWHT to API 650 is done due to wall thickness. Should this have been determined during weld procedure qualification or does published acceptance ranges exist...

Hi We are manufacturing a water pipe stop (either a blank or a head welded to a weld neck App 2 flange) where a valve is removed and it is designed/manufactured to ASME VIII Div 1. The inner diameter is ~700mm and the design pressure is 3500 kPa. We want to follow the flange to head path, due...

Ebart For anything more than 3 saddles we use the three moment equation to determine the loads at the saddles and to evaluate the stresses at the saddles we use PD5500 Annex G, as it allows for saddles not welded to the vessel. It is not a quick procedure if you are starting from scratch. I...

Hi Does ASME VIII Div 2 specify a surface finish and profile for vessels operating in fatigue service? For example fillet welds that are radiussed and circ/long welds that are ground smooth. OR is there a recognised standard which states or provides samples/photos/etc, by which the weld...

Hallo All What is the ASME B16.9 forming/manufacturing allowance for fittings made from ASME SA 234 WPB (Holiday break and the spec is in someone's office!)? ASME IIA lists the allowance for SA 106 Gr B pipe (12,5%), but not for SA 234 WPB. ASME VIII I discusses pipe undertolerance a few times...

Hi all Does anybody know where I can find details for BS 1560 Part 2, 1970 flanges? Or what are the equivalants? We are replacing a heat exchanger which is currently attached to piping with these flanges. Sizes are 24" to 40", so simply providing mating flanges is my last resort! Thanks

For AD Merkblatt and related codes, I have used DIMy, you can find them at www.rwtuev-at.de (just click the English button!). Also see www.optivessel.com for ASME/BS/API calcs. I use Compress and CodeCalc as they tend to give most reliable answers cover the widest range of cases. Regards Rudo Louw

Hi I have an interesting situation where the line between pressure vessel and pressure piping has been blurred. I would like to know if anybody is aware of a rule when to treat a component as a pressure vessel / boiler component / piping. We have a fired heater where some parties want the...

Could anyone provide me with a design code or standard for the design of a vessel operating under vacuum (-22 kPa)condition? Internal pressure is only liquid level. The vessel is a large diameter (7000mm) absorber with a 15 degree top cone, flat supported bottom and a large rectangular opening...

Refer to a book by Kanti Mahajan: Design of process equipment. Part C, at least for the 2nd edition, covers the design of rectangular flanges. The design program Optivessel has a module based on this method, visit www.optivessel.com. Regards Rudo Louw