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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

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...

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

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...

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