Dear All,
Can someone recommend a good manufacturer of Submerged Arc Welding Machines for plate thicknesses ranging from 8mm to 30mm which must be compatible with Tank Jacking method of erection. All of the searches I have done online the units are only compatible with bottom to top approach...
I really apologise but I posted the below post over a year ago and did not get a response... I am now in need of the answer again and I am hoping that someone will be able to assist. I apologise if this double posting is frowned upon but it was such a long time ago that I figured it would not be...
Dear All,
In Section 4.2 of API 650 it only permits the use of J0 and J2 plates for the grades 275 and 355 but does not mention anything about using the more common JR. Can someone please explain why this is?
Thanks
Can someone please confirm that I have fully understood the location requirements as stipulated in NFPA 30.
Assuming I have 2 nos. Gasoline Storage Tanks with a diameter of 11m equipped with Internal Floating Roofs according to Table 22.4.1.1 (a) as long as they are not within 11m of any...
I would like to get some assistance in sizing a water storage tank based on the required flow rates from foam application, cooling water and the hose stream allowance following NFPA 15 and NFPA 11.
Please see below required flow rates;
Cooling Water Flow Rate - 394m3/hr (For 2 hours as per IP...
Dear All,
In API 650 5.9.7.1 the Kz = velocity pressure coefficient = 1.04 for exposure C at a height of 40ft.
What about tanks which are not 40ft high? Where can we find the correct pressure coefficient for the different heights? I have searched and found reference to ASCE 7 Table 6-3 however...
What are the rules and/or guidelines in API 650 of the shell plate of a storage tank having different grades of steel? Is there anywhere where it explicitly allows or does not allow this? We want to use a slightly higher grade on the lower courses and then a higher grade steel towards the top of...
I am trying to read through ASME IX to qualify some welders and have some queries on the ranges qualified;
1. QW-452.3 - This states that the smaller diameter pipes automatically qualify the larger pipes... For example if the welder is qualified on a 1" pipe they are also qualified for 20"? It...
Not sure if this is the correct forum however hoping for some help.....
I am trying to find calculations to size an oil interceptor for fuel storage depot however do not know what the calculation or design standard to follow is... I would presume it is based on rainfall and the surface area...
I was recently given the calculation for emergency venting as per NFPA 30 using a "manhole with long bolts" 22.7.3.2.1 (2) as per the below.
CFH = 1,667*Cf*A*√(Pt-Pa)
Where;
Cf = Flow coefficient of valve (set at 0.5)
A = Area of open manhole or area of manhole lift
Pt = Absolute pressure...
I cannot see in any NFPA standard where it is referenced the spacing requirements between the fire water tank (and pump house) and the storage tanks. Do we take it as an important building on the Same Property as highlighted in NFPA 30 Table 22.4.1.1?
When trying to calculate the water requirements for a storage tank farm containing Atmospheric Storage tanks how do you consider the bund area? Can you calculate just the requirements of water for the storage tanks based on the flow rates in NFPA 15 and assume that some of this water can be...
I have a couple of questions relating to cooling of atmospheric storage tanks as per API RP2030.
1. Section 7.3.13 states;
When reviewing an atmospheric storage tank’s protection
from an external fire the design personnel should
recognize that cooling water is of potential benefit only for
the...
Dear All,
I would like to find out where I can find the maximum allowable velocity's in piping sytems in an ASME or API standard. It has always been stated that a maximum allowable velocity for product piping is 1 m/s and water piping 3 m/s however I would like to know where this is stated.
Thanks
Is there any recommended pressure above the storage tank (API 650) design pressure that an emergency vent should begin to open? I cannot find anything in API 2000 about this however I have seen recommendations for 33% above the design pressure.
I look forward to peoples replies!
There are no calculations on how to size an open vent in API 650 or API 2000.
I want to design a simple swan neck vent on an atmospheric tank but do not know how to calculate the flow of air into and out of the vent based on the filling and discharge rates of the tanks.
Any help would be...
When calculating the uplift loads for overturn moment calculations (sect 5.12) it states that P should be calculated from Appendix F as opposed to the actual design pressure of the tank. If the tank is small however P calculated in F.4.1 can be incredibly high and distort the calculations...
I do not know if double posting is frowned upon and I apologise if it is however I am desperate to get some advice from people regarding fire protection in a storage tank farm and compliance to international standards (I had posted similar content in NFPA forum). Is there anyone who can offer...
I would like some advice on the overturning moment calculation on the above mentioned subject. Can someone just confirm my understanding is correct.
MDL = (Weight of shell + roof rafter) * (Dia/2)
MDLR = (Weight of roof plates)* (Dia/2)
MF = WL * Dia * pi * (Dia/2)
Now to 5.12 Tank Anchorage...
I would like to get some answers to some very basic questions with regards to NFPA 30 and the fire fighting requirements to comply to this standard.
1. It is my understanding that to comply to this standard it more or less comes down to the type of fire protection you have in place compared to...
