Material Specfication

You remind me of some instrumentation engineers I worked with in the past. Stainless steel orifice plates in carbon steel, so we must use something 'higher' in stainless steel piping. Also had to explain to some process engineers that we needed to understand the environment the material was in. Sometimes, carbon steel is a better selection than stainless steel.

So, without knowing what service your venturi tube is in, no one can properly answer your inquiry.

Fluid is extra Light Arabian Crude (AXL),42.0" Tube Requirement

Pipe spec for Gate Valve is Trim 8 , Stellite Hard Faced,That is Pressure Bearing / Retaining Parts .

venturi tube i belive no pressure bearing parts, so thought of Carbon steel Body

Company is looking some cost cutting solution

Regards

Jose

I agree with srini. Maybe Iris will show up.

If it is a 42" pipe line with petroleum being transferred in it, THIS IS DEFINETLY NOT THE PLACE TO ASK SUCH A QUESTION. There are numerous codes that must be complied with. These are for obvious reasons, especially leakage and catastrophic failure. A 42" line will make a great big gusher and the expensive clean up costs if it leaks. That would certainly not be cost cutting!

Good Luck, Old Salt

Josej, If you ask the Vendor to machine and fabricate the Venturi to match minimum pipe thickness (schedule) as per Piping Material Specification, then you can proceed ahead with Carbon Steel.

Ensure to meet the specification of O'let fittings for the taps as per Material Specification. Also, If you plan to procure root valves along with the Venturi, that should strictly meet the material specification including trim and type.

It wouldn't cost anything to omit it completely!

Yes, no.

42

In most piping situations, using materials of the same composition is preferred. If for no other reason they both react in the same way. There are several other reasons but too long to list and explain them. Yes, its OK.

No, unless there is some very strong reason to use some other material. It is usually a waste of money and in some cases can be more difficult to weld.

Good Luck, Old Salt

It all works with the corrosion/ errosion of the throat of venturi what velocity is achieved at the throat of the venturi , it determine the errosion rate of the material

http://pipeng.com/index.php/ts/itdmotflow007d/