Pressurized piping advise sought

The mass fow rate [when converted to volumetric flow rate] is required to determine the pipe diameter based on certain allowable pressure drops e.g. 0.5 kPa/100m. Without the flow rate, guess that you have to use engineering judgement the maximum that the upstream side can deliver or the downstream stream side can demand???

Else check other plants of simialr size or consult the vendors of equipment that this pipeline will service.

Failing that....limit the flow rate??? If there are no limits, you set the limits.

What info do you have? Volumetric flow rate??? Anything???

you will of course need to be more specific,but one thing to consider is that once you move toward higher pressures, the standards are very different and meeting them is important. Especially if they are outside an experimental application.

Also, the standards relating to pressure piping are a good place to start as they tell you what you need to do to meet them......or at least you know what is required.

What specifically do you want to know about. You could fill a small library of books, standards and publications relating to pressure piping.

Design of a piping system include the followings:

1. Pipe sizing (pipe dia.), the gas flow rate (mass or volume) is necessary to determine the NPS, taking into consideration the total length of pipes, fittings, and valves to calculate how much the friction loss (drop of pressure) that affect the flow rate.

2. Pipe material is selected to withstand:

a. Gas corrosion/erosion. b. Stresses due to internal and/or external pressures.

3. Pipe wall thickness depends on : pipe size, pressure, temp., allowable tensile strength of material (SMYS) and procedures of manufacturing/construction and NDE.

According to ASME B31.8 (Gas Transmission & Distribution Piping Systems), the pipe wall thickness is :

t = P D_o / (2S*F*E*T)

where, t = Nominal pipe wall thickness, in.

P = Design pressure, psi

S = Specified Min. Yield Strength (SMYS), psi

D_o = Nominal outside dia. of pipe, in.

F = Construction type design factor (see ASME B31.8, Table 1-4)

E = Longitudinal joint factor (see ASME B31.8, Table 1-5)

T = Temperature derating factor (see ASME B31.8, Table 1-6)

Okay, thanks for your advise guys. I wish I could be more specific, but the person who wanted my help didn't provide any specifics himself.