Recent content by RGME

sailoday28, I assumed two gas reservoirs at different pressures (800psig and 700psig) connected by a 100ft long 36" pipeline and applied the Darcy formula to calculate the flow rate. I understand this may not have been the correct approach to take but I thought it would get me into the ballpark...

Ashereng, You are correct. There is a 16" bypass. The bypass valves are manually operated and this is an unmanned facility. The mainline valve is automated. I am trying to determine the largest pressure differential against which the 36" valve may be opened. Looks like it's not going to be very...

The 36" valve is used for on/of service. Currently it takes approx 40secs to travel from closed to open. I have calculated that if I open the valve against a 100psi differential that the initial transient flow rate will be very high (1.2 BCFH) which is much higher than my flowmeter annubar can...

Thanks for the responses, I am not concerned about the effect of velocity on the pipeline. However, there is an inline flowmeter close to the mainline valve (annubar) with an upper limit on flow. I do not want the transient flows to damage the flowmeter. Do either of you know which flow formula...

Coade's CADWorx or CADPipe is the way to go. Easy to use. Let's you input your own pipe specs and the 3D rendering looks great.

Hello all, I have a situation where the mainline block valve in a 36" natural gas pipeline is closed for a period of time. During this time, the pressures on either side of the valve drift apart. e.g. Upstream pressure = 800psig. Downstream = 600psig. If the mainline valve is now opened what is...

All, Can anyone recommend a good source of information for designing/locating pressure taps in an existing gas piping system? I am trying to locate a tap for pressure control purposes in a 12" gas line (MAOP = 800psig). Unfortunately there is not much straight length of pipe available in the...

thanks for the link jeroenjacobs. just what i was looking for.

I am looking for a table showing pipe sizes (OD and wall thickness) per DIN piping standards, something similar to ANSI B36.10. Can anyone help? Thanks.

I am looking for a table showing pipe sizes (OD and wall thickness) for DIN standard piping, something similar to ANSI B36.10. Can anyone help? Thanks.

Thanks for your responses so far, but what I'm really looking for is a guideline for setting the maximum[/b] field hydrotest pressure. I already know the minimum pressure. Does anyone have a feel for what the upper limit should be? Given that the steel pipe in question (API 5L X52) is...

I have a question related to the maximum hydrotest pressure for a natural gas pipeline. API 5L X52 pipe material, 24” OD with 0.375” wall thickness will be shop hydrotested per API requirements to a hoop stress that is a minimum of 90% SMYS. This value turns out to be an internal pressure of...