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Have anyone an extended table about structural minimum thickness for piping? Whath criteria do you suggest to use for an 88" blowdown pipe?

These exchangers cool the main column head gas by water sea Alfa Laval proposed 3 Titanium welded plate exchangers for this service (Compablock Titanium grade 1 plates , T=80-100 °C, 3000 ppm h2s, 1500 ppm Nh3, <10 ppm CN, 0 ppm Cl). API 571 par 5.1.3.2 advise for hydriding risk (NACE MR175 par...

In regenerating H2SO4 plants it's often necessary to weld some patchs on pipe or equipment (carbon steel type) with liquid acid inside to eliminate leakages or add corrosed thickness. Often it's very difficult to clean very well the metal surface before welding. This is a very dangerous practice...

What type of firesafe certified gaskets is possible to use in H2SO4 92-98% service (max 100°C)? I asked about Grafoil gasket but the chemical compatibility table of this material show it like non recommended in H2SO4 service over 95% Could you help me? Thanks Aldo Cigna

In my refinery many PTFE modified gaskets (Garlock Red Gylon type) are used in H2SO4 piping. Recentely many PTFE lined ball valves are used too. I want know your opinion and your experiences about the firesafe property of this material inside the Alkilation plant and inside the pipeway outside...

The API RP2201 reccomended a minimum metal thickness like a function of the thickness required for strenght plus a safety factor (usually 2.4 mm) to prevente burn through. I don't understand very well what temperature i've to use to calculate the thickness for strenght. If this temperature is...

Two storage tanks worked at 50°C. The shell plates material was FE430B (equivalent S275JR) Now the storage tanks have to work at 90°C and we changed the shell plates using the same material (S275JR) Is it correct? is this material a correct material at 90°C design temperature for API650 or...

Can i use S275JR for fully or partial shell plate substituition if design temperature is 90°C? Tanks

When the equipment design temperature is very hot (e.p. > 350°C) is correct use, in the cold bolting operation, the same 50KSI standard preload value for B7 bolt type preview in ASME PCC-1? When the equipment will be in temperature is correct think that the DL/L of bolt will remain the same...

The rule is this 3.1.5.7 Shell-to-Bottom Fillet Welds a. For bottom and annular plates with a nominal thickness 12.5 mm (½ in.), and less, the attachment between the bottom edge of the lowest course shell plate and the bottom plate shall be a continuous fillet weld laid on each side of the...