I am designing exchanger of 1.25Cr (SA-387 Gr 11). As per UCS 56, for P NO. 4 PWHT is not mandatory is thickness is less than 16 mm, but Pvelite is making PVELITE mandatory PWHT even if thickness is 12 mm. Kindly clarify.
Hello,
I have a 44 m dia water buffer tank. Client is asking for a external floating roof and also an overflow nozzle. Considering seal system, is overflow nozzle advisable.
As per C.3.1.1 of API 650 overflow opening can be provided, SO what need to be considered when locating overflow nozzle...
Hello,
I am working on an API 650 external floating roof, naphta tank, which will be undergoing change of service from Naphta to Crude oil. In this perspective what things I need to do from an engineer contractor point of view. It is in FEL-2(feed) stage. Below is what I think I need to do:
1-...
dear All
Good evening,
I am designing a reactor as per ASME Sec.VIII. As of now I am using div 2. by PVElite.
The Design conditions are the following :
Design case : 8.1 mpag @ 427 Deg C
Regeneration case: 2.1 mpag @ 537.8 Deg C
external pressure: F.V @ 427 Deg C
Material : SA 387 11 cl.2...
Hi,
I have a BEU type exchanger on old asme sec div.1 edition. job is to upgrade exchanger by replace channel bonnet to new 1.25Cr material. This is done because service is hydrogen temperature is high, so chance of HTHA is there. Shell side, tubesheet and tube will remain same. Client is...
Hi,
I did not find any reference of under bottom connection API 620. can we include those under bottom connection details as shown in annex O of API 650 ??
In API 620, as per clause 5.14.5, minimum weld toe toe distance is 150 mm for all nozzle. In aramco spec 32-samss-006 it give an additional clause to api 620 which says 50 mm distance,should i follow the stringent which is 150 mm?
quote
5.14.5 Each opening in the walls of a tank shall be...
Hello,
In API 620 there is no reference of flush type Clean out door like in API 650, only reference is flush type clean out nozzles, with a limitation on internal design pressure: it says "5.27.1.2 The design pressure for the gas vapor space of the tank shall not exceed 2 lbf/in.2 gauge."...
Hi,
I have api 620 water tank with 15 psig design pressure and 9.4 m dia. Client is looking for a way to limit site activities. One solution is to reduce the diameter to 6 m . In this case i did not find referece of shop fbricated tank in API 620. My question is can we do API 620 tank in shop...
Hello,
I am working on a API 620 sour water buffer tank for Sauid Aramco. One of the client's comment on tank outlet nozzle which is located on shell lower side, is that they are asking for weir plate or some protruding plate, before out outlet nozzle, to avoid carry over, in to the pump, of...
I have a de-ethanizer column, with carbon steel base material and S.S 316L cladding. My question is that even after using clad plate is it mandatory that base material shall meet requirements of NACE MR0175/ISO15156?
Regards,
Inam
I am designing a new tank for Gasoline and MTBE having dia 30.5 meters. For roof design we have two option, 1) external single deck floating roof or 2) internal floating roof
For external floating roof i am pretty much confident that single deck floating roof will be my choice, but i am...
I have request from client:
There is an external floating roof , 30 m dia. this is to be used for gasoline/MTBE.
Now client says can this be used for methanol, ethanol and pygas at same time.
As per my understanding for methanol,ethanol and pygas you have to use internal floating roof with...
i have 73 m tall column. Client is putting up scaffolding on one side of column(as shown in the attached picture). Scaffolding company has done some calculation, and gave wind force at the tie in points and overall moment at the base.
Client now want to check this thing.
Any one having...
in API 650 data sheet there is a requirement called " flotation consideration". When do we have consider ithis in tank design. As per the explaination given in annex-L, this is related to when the dike wall is flooded.
Kindly elaborate on this.
Regards,
Manj
Hi,
for pressure on skirt support, this is a general practice that vessel manufacturer prepared a template(jig plate for anchor bolt installation. My question is this a mandatory requirement or a good engineering practice. I mean if we do not mention in data sheet or engineering spec, still the...
If a vessel is under PWHT and there is a S.S cladded plate also. How cladded is done? i mean after rolling of plate by vessel manufactuured or the mill will send the cladded plate?
PWHT for whole equipment will be after cladding or before cladding is applied?
Hi,
My client want has a to replace existing carbon steel tubes in a shell and tube heat exchanger with stainless steel tubes.
Can this be done?
what will be the limitations?
Does TEMA and API 660 addresses this dissimilar material situation and what what guidelines are there in these standards?
In the light of latest ASME, Is it mandatory to check standard flanges against nozzle load. In this way most of the time flange rating will increase and every time we have to inform piping department to increase flange rating.
IF A DATA SHEET DOES NOT SAY TO CHECK APPLY LOAD ON FLANGE, EVEN...
i am designing girth flange for heat exchanger in pvelite. Girth flange face is female and tube sheet face is male type. My question is which facing sketch and column should I select to represent my male-female type girth flange configuration?
