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...
Stookyfpe,
Thanks for your reply. I was given the equation by someone else on querying how to calculate the size of the manway. If this equation is not correct what is the correct equation if trying to calculate the maximum flow of the manway when fully open? Calculating the pressure at which...
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...
JStephen,
Thanks for your reply.... I came to the same conclusion however cannot understand why they would not add an additional clause relating to the temperature. For example I am based in a country when it never drops below 20 Degrees and JR is by far the most common steel and according to...
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...
Anyone else have any ideas how to reduce the water requirements to a more reasonable level?
As mentioned when using IP Part 19 everything is explicitly mentioned however the fact that you must cater for a 10L/min/m2 for each tank results in huge fire water lines and also an enormous water...
Dear Sshep,
I find this statement in API RP2030 a little confusing as it first states that only the upper portion is to be sprayed then it goes on to state that the entire tank is to be sprayed as the exposure is unknown.
It also only seems to state the occurrence if another tank is on fire...
Does anyone have any clear water flow rates for cooling water systems in storage depots? I have long tried to find something a little more lenient than NFPA 15 which demands a cooling ring every 3.4m and 10.2Lpm/m2 however every depot I have worked in have only ever seen the one ring at the top...
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...
IFRs.... Is there anywhere we can get some literature on your statement? We are about to install a Floating Roof into a tank and the client has requested slots to the top just as it is convention. The product is only going to be gasoline so would be good to advise them accordingly however would...
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...
