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category group applicable for zone 2: 1G, 2G, 3G possible ignition source: - surface temperature - electrostatic charges I think micalbrch's right but I want to have documented confirmation, if there is one

Hi i red in 94/9/CE guideline that safety protection system needs only Ex specific marking, it's true? what is the correct marking (PSV in Zone 2, explosion atmosphere by gasoline vapours)? 1) Ex 2) Ex - II 3) Ex - II 2G 4) Ex - II 2G - IIB 5) Ex - II 2G - IIB TX 6) Ex - II 2G - IIB T3 thanks

Hi, what kind of PSV is applicable to slurry discharge? -solid suspension in liquid water with KOH -total Solid 35000 mg/L -Density: 1400 kg/m3

asme VIII div.1

can you give me the paragraph reference of calculation code? thanks

I have an exchanger with: Design Pressure sheel side 1barg/FV Design Pressure tube side 7barg tubesheet tickness calculation must include 7+FV ( => Pressure = 7-(-1.013)=8.013bar)case?

I must buy the right fill fluid for two similar DPcells; these fluids have contact with process fluid: the first with sulfuric acid aqueous solution pH 2 and the second with soda aqueous solution pH 13. I think that fluids must have some Characteristics: density > process solution immiscible...

thank you

do you think that the relationship dP/dT = -alfa/k at costant V, deduced by 25362 post, is right? If so, T increase involves to P decrease, contrary to reality. can you spend any words to make me understanding? thanks

who can give me a relationship between pressure and temperature of a liquid with costant volume? tx

are there on-line sources about the problems in object? specifically 1- water hammer and criteria of design for its elimination; 2- pressure wave pulsation and criteria of design for its elimination. thanks

i know, my draw is so ugly, i hope this is betterhttp://files.engineering.com/getfile.aspx?folder=065d7168-5c32-4565-a922-8114ff371420&file=LAYOUT.TIF

THERE IS A PIPE L = 100 METERS, TWO VALVE ARE CLOSED AT ITS ENDS, I MUST CALCULATE THE FLOWRATE IN THE TRV VALVE WHEN THE TEMPERATURE OF THE FLUID (OIL) INSIDE RISES BY RADIATION OF TUBE. (Ti=30°C, Tair=40°C, DN 150, L 100m). SOMEONE CAN GIVE ME A METHOD? IT FOLLOW MY FIRST APPROXIMATION...

your first is right materials: lubrificant oil (2000kg) packaging: iron vessel arrangment: --------- ----------- | | | ____ | | (____) 1 | | | | ____ | | (____) 2 | |...

Someone can say if there are codes for calculation of "cargo fire" (sum of calorific with some reductive coefficientes) in a outdoor-warehouse?