Recent content by kvbalu

Hi I am looking for some calculation or information for stiffening of Blind plates for Hydrotest. The Plates avaialable aren't sufficient for the hydrotest pressure. The diameter of the pipe is 54". the wall thickness of the Pipe is 12mm. I tried calculating the required thickness as per the...

What requirements other than Process conditions dictate the requirement of PWHT of Plates for Storage Tanks as per API 650 ?

Are there any practical limits on fixing the Pump in /pump out rates for Floating roof Storage tanks ? Else, are there any limits on Floating roof velocities ? any relation to Diameter of tanks ?

Are there cases of condensing vapours (not steam, but petroleum vapours) creating enough vacuum to suck the roof in? Members may like to advice.

Looks like a suck-in due to vacuum. No material was being drawn in or out during the time of collapse. The heating system was working normal (unless there were leaks in the steam coils inside). I would be able to look at the steam coils only after the tank is ready for man-entry. No signs of...

I have a case of a 32M dia x 20 M height Cone roof fuel oil tank, the roof of which collapsed. The roof alongwith the truss structure caved in. At the time of the collapse, the tank had about 2 Metres of fuel oil in it. The tank had steam coils but there wasn't any transfer from / to the...

Pls refer to below thread. thread794-179601 Would be interested on more suggestions from members.

Dear all, I would like to know the basis for calculating the relieving capacity required for a Mounded LPG bullet designed for 15 bar. What would be the basis for the exposed area of the vessel for a Mounded bullet in a fire case scenario, where only the Nozzle dome is exposed out of the mound ?

Its time API clarified on Wind load calculations with respect to minimum wind velocities as well as on the confusion prevailing on the Moment calculations (another thread elsewhere).

Refer my query on minimum wind velocities. I took it up with Mr Gordon and the reply is reporduced. " If an API standard is silent on an issue, sound engineering takes precedent. Best regards, Gordon API Gordon Robertson 1220 L Street NW Washington , DC 20005 P-202-682-8190...

Does API650 allow for taking credit in the Design of Wind girders, when Wind speeds are less than 120 mph? Add-4 has introduced the Velocity consideration in the calculations in 3.9.6, 3.9.7. Wind velocity in my region is 87 mph. The resultant would be comparatively less no. of wind girders...

What is the relationship between Joint efficiency and Radiography per API 650 ? Can a Joint efficiency of 1.00 be used for design and Spot radiography be applied during construction. What is the normal engineering practice ?

Portions of a floating roof could have higher corrosion allowances (like the central deck, inner,bottom plate& outer rim of a pontoon, nozzles, buoys, appertunances exposed to liquid), while Top plates of Pontoons, external buoys not exposed to liquid etc. could have lower corrosion...

[b]I have to calculate the allowable nozzle loads (10" 1500#) on the inlet nozzle of a NEMA turbine. For this I have to calculate the equivalent area of the turbine exhaust for calculting the allowable nozzle loads on a NEMA SM-24 turbine, since the code specifies that I first calculate the...

Anyone out there with a vendor list of Split Tee manufacturers (conforming to ANSI B16.34) in the world ? Split tees are used for Equal size Hot tappings.