API RP 505; RP for Classification of Locations for - download pdf or read online

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Additional resources for API RP 505; RP for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2

Example text

D condirions. Assume this frame is simply supported bv two bearings, loaded with the dead weighi of the fiame as well es the weight of rhe baffl;. e is Inserted into the box car with the pressure of the grarn against it. The frame is fixed or held at the rower connection. This resqlts in__ 1- A twisting action to the lower horizontal member. ffle above the bottom member. A twisting and bending action on rhe vertic]l . member. plpe The- following analyses the strengxh aod stiffor- ttre lrame supporling a 500_lb vercical :tes: roao and lts own dead weicht.

Fi _____| F_350 " N, weld to assure . 1 ftlsecz The force required to decelerate the trailer -w is - c lbs t,.. ". l . 16 in.. { S. 3 (top) will be supplied by the braking force of the trailer,s tires, and only a portion might be transferred through the fifth wheel unit. U just the truck were to supply the braking force, it would require a much longer distance to stop, thereby reducing this horizontaL force. ished that the moment of inertia and section modulus being higher about the vertical axis would resist a higher transverse force, the finding that the horizontal force is less than the vertical force makes further computation utrnecessary.

Owable loadper .. linear inch for a fillet weld of 1'r Leg size, the mini_ mum fillet weld leg size is-- Vertical. 095" Irlr 2Mr Then Chgck Stiffness of Frame vertical deflection (j) when p = 5O0lbs is applied. Since we are ooly interestedinthe chanse between unloaded and loaded conditions. r9 -M. oo) 4,560 in. 0052', I LI" Ir I"l r 2(18) . 3(60) I soo 1M{a2a 2 EI. " rCIr roe :rr . 4 -6 / 5lolionory-Member 4. TORSIONAL R Design ESISTANCE In most cases there is some torque on the frame, and in many cases adequate torsional resistance is the primary design consideration.

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API RP 505; RP for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2


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