Search results for query: *

Hi, This is a little out of My area, but I have the question what are the difference between an earth continuity relay vs an earth leakage relay? At the end both of them look for an earth fault ? And in what application one is better than the other ? Thanks in advance

Good day everyone, Yesterday I was a issue with one pump operated by motor, where it wasnt deliver enougth flow rate and it was running with low current. at the end I discovered that the problem was a dead head operation So my question is, a symptom of a pump working in dead head is low...

What is the static head in a system were discharge vessel is not at the highest point in the circuit? Highest point in the circuit is at 11 m from pump discharge. Discharge vessel is at 0 m from pump discharge...

Hello all, I want to know if it is common to weld support pads on the tank shell , if the welding lines are over the welding lines of the tank. if it is not possible what is the reason? see attached picture...

Hello all, I am working in the erection of the 4 courses of a API tank. In the second course I found that one shell plate is shorter as per design drawings. this generates a bigger gap for the welding ( 2mm in the bottom of the plate and 12mm in the top) see attached sketch. What could be a...

Hi all, I am a mechanical engineer trying to improve in my career. I want to know what kind of engineering master you could recommend me if I want to specialize in the EPIC projects. thanks in advance

Hello all, I am installing hydrants of dry barrel, but these was bad specified about the barrell length. So to suit we are thinking in modify the barrel (cut to be shorter) and valve stem. From a construction point of view is very easy the modification. But now I am thinking that maybe there is...

Hi all, I want to sent to fabricate J anchorage bars for a tower crane foundation. As per the vendor of the crane the anchorage bars need to be grade 8.8, so my question is: to specify the material for the manufacture, it is enough information for the manufacturer, only specifing him " Carbon...

Hi all, Currently I have a Gantry (Bridge) already installed with a permissible deflections by the settlement of the structure . Above this structure I will install a shuttle conveyor, Therefore the rail of this machine will present unacceptable deflections that I will require to correct, in...

Hi all. I am aware about the rule, that if I have a diesel pump, I will need to install sprinklers above the storage fuel area as per NFPA 20. This is a common practice. But in the particular project that I am working ( A copper process plant in a copper mine) we have the fire pumps at outdoor...

Hi all, Normally We pre manufactured all our rubber lined spools with a supplier, but now is necessary the modification of one in field. Here we have all the tools and good personal to work in that. In this special case, I am requiring to trim a 1 meter nipple from one spool and this same...

Hi all, For the design of a temporary camp, small rooms, it has been decided to power each room with a single circuit - 2 pole breaker for an 1100VA Air conditioner split (240V, 2 hot wires 120V each) and from there, one hot 120V phase will continue to power 3 outlets for small appliances and 2...

HEllo all, I want to know if you recommend to use some kind of heat treatment after the process of bending a pipe. For the bending I am using heat to put more ductile the material. The material is Carbon Steel (api 5l). thanks in advance.

Its known that 240V can be obtain typically (US) as 1ph, 2 hot wires (120v each) commonly used for domestic A/C units, for example. I have now seen a few equipments from different countries where 240V is obtained by having a 480 primary / secondary 415-240V 3phase transformer and connecting 1...

Hello All, In your experience do you recommend a system of cathodic protection (impressed or galvanized) for a Carbon steel Pipeline of Diesel running above the ground (not buried)? For information the life of the plant will be 50 years.

I am in a project where I am seeing tanks already constructed but without cathodic protection system. Is there a form of implement this system or something that give the cathodic protection to this tanks?

Hi guys, I have two questions about the surface treatment in a SS tank 1)For the construction of a SS storage tank, is necessary passivation and pickling? or only passivation could be enough for the construction? 2)What is the difference between the ASTM A 380 and A 967? I have to use one of...

Hello all, My issue is: I have several square base plates bigger than the concrete pedestals. the base plates are for columns and these will be over the concrete pedestal (typical column with pedestal arrangement), so I have to cut the base plates to be smaller than the concrete pedestal. My...

Hello all, I install a vessel, where the nameplate location is no visible. there is an obligation in the codes about put the nameplate in a visible part? How Can i achieve this without cut the existing nameplate?

Hello all, There is a guide, table or method to determine the fillet weld size in a structure subjected to cyclic stresses? Frequently for static structure I use the table for min and max size of the AISC. Is this a good method to determine this size? thanks in advance.