I have a question regarding API - 650 shell horizontal joint details. Details shows that the bottom shell course is square bevel and the upper shell course is square , single or double V bevel. Why bottom shell course requires square bevel? Can we make it also single V or Double V.
Actually...
I have a question regarding hydro testing of vertical radiant tubes of fired heater.
The U tubes are being welded with the manifold and the manifold itself is in 3 pieces which is being welded at site also. After all welding activities are done the manifold circumferential joint and the joint...
Thank you everyone for your response. I also personally feel that hydrotest should be done and this what I proposed to the client but now the contractor has raised 2 more concerns.
1) The equipment does not have drain nozzles, so how the hydrotest water will be drained?
2) The foundation design...
We have a waste heat boiler for new sulfur recovery unit. This equipment is in 3 sections. Boiler, reaction furnace and burner section. Boiler and reaction furnace are manufactured by one manufacturer and welded together and hydrotest at shop. Burner section is manufactured separately and...
@ Bonswa : Its a new tank 70m , but after welding of bottom plate it shrinked and the OD of annular plate become less , hence the distance between the shell OD and the outer edge of annular plate become less than that is specified in API. The reason of this question was, if its only about the...
Is circumferential welding on outside of tank annular plate is allowed? Means if the outside projection of annular plate is less than specified in API then can a butt welded ring be circumferentially welded to annular plate in order to increase the outside projection.
I need some background of following clauses of API-650.
API 650 clause 5.5.2 restricts to use less than 600mm distance between inside of shell and any lap weld in bottom plate. What is the reason behind this restriction. What if a tank has been fabricated with this distance less than 600, say...
I am working on a reactor design using PVElite with a material of SA387 Gr22 Cl 2. The design conditions are 350psig@1000F and FV@100F. When i put support lugs on this reactor (the mateial is also SA387 ... and bolts of SA325) , I encounter following error.
"Maximum temperature exceeds when...
API-650 limits the plate thickness of A36 to 40mm, what I wanted to know if this would also be applicable to anchor chair for the tank. Can i use more than 40mm A36 plate for the anchor chairs of a tank?
I have a situation here . Can anyone suggest that if we have to weld a SA-51670 plates with a SS316 backing strip then which electrode is best . Well I think root should be of 309 and then caping would be of 7018 OR complete 309 .. Can any one with welding knowledge suggest. I am also attaching...
Thankyou very much for everyone , finally this is decided after having discussion with client and senior engineers , cladding will be done on this vessel b/c if the base metal has the requiment of PWHT then it should be done .
Thankyou 4 all comments .
BR
Assad
Yes , the services is Lethal , but my confusion is that , if we are providing cladding to protect the internal surface of the vessels and the liquid inside will not be in contact with the CS vessels , then is there a requirement for PWHT or not ?
BR
Assad
Hello All ,
Carbon Steel Vessel : SA 516 70
Cladding : 316L (For corrision resistance)
Service : H2S
Thickenss of Vessel : 18 mm
CA for CS : .125" and SS : .0625"
Is PWHT is required for this vessel ? I know that the thickness is...
Hello All ,
Well I have almost done with some calculations , just need one suggestion , do I go for dome roof with rafters or dome roof with rafters and internal column. Also after what diamter should internal columns should be used .
Also DSB123 how can I send my calculaitons for review...
You have to follow ASME Sec VIII Div 1 for such kind of design , since there is no internal pressure so you can use the minimum thickness mentioned in the code , but the vacuum condition governs the actual thickness of the storage tank or vessel.
BR
Assad
Dear Dr. Costas J. Tsaprounis,
Well I have done some basic calculation considering a simply supported straight beam with trapoizoidal loading . Loading increases as we move towards outer compression ring . The loads I have conseded in UDL is as you have suggested live load , snow load...
Dear All ,
I am working on a 60m dia tank for fuel oil. Before I have worked on small diameter tanks and hence self supported cone/dome/umbralla roof were satisfactory. But now I need to design a dome roof with rafter on it . Can any one give me an idea about how to proceed for the...
