In other words a circular tube lying bottom center of a circular pipe through which gas is flowing. We've had an entity performing some actual tests for us using air, but we can't believe the results. The capacity loss associated with an area reduction due to the innerduct of less than 3%, is...
Can't find anywhere. Does anyone have typical values for MDPE-MDPE, MDPE-HDPE and HDPE-HDPE. Application is cable being pulled through conduit. Static? Dynamic? Variation with speed? Thanks!
I have a 1/2" stopcock on the branch of a gas service line carrying fiber-optic cable. It is in the vicinity og the gas service line stopcock. Since the only time it should be used is in an emergency by fire or gas utility personnel, and will sever the cable, I'd like to make access...
Anyone have experience and/or suggestions on how to seal around FO cable exiting a conduit. Sheath of cable and conduit are both polyethylene. Can't access ends. Must be able to contain 100 psig of gas in conduit. Thanks!!!!
We are developing technology for installing fiber optic cable in live natural gas distribution main. I would appreciate your advice.
Polyethylene tubing is used as innerduct in the main. It lies straight and in the center at the bottom of the pipeline that is carrying gas at 60 psig. At...
A natural gas pipeline at around 60 psig contains a tubular innerduct. At certain points the innerduct traverses a tap hole in the main for a branch.
Diameter of main/innerduct is from 2-3"/.25", 4"/1/2", 6+"/1".
How could I determine the impact of blockage by...
I'm using Polyethylene tubing as innerduct in a gas pipe. The internal pressure of innerduct is 0 psig. Would the minimum bend radius specified for innerduct assumed to be used to contain internal pressure still apply, or could a smaller bend radius be used without compromising integrity...
Should be fun for hard-core math types. An innerduct of outside diameter d, runs inside a 4" IPS pipe (0.188" wall). Said pipe makes a 90 degree turn. The elbow used is a long radius, i.e. bend radius of 1.5R or 6". What is the maximum bend radius in inches of the innerduct...
Does anyone have any experience hot tapping cast iron used for natural gas distribution, probably less than 5 psig. Want to add 4" branch on 4" and above main. Most solutions involve welding fitting to split sleeve or repair clamp, attaching the sleeve/clamp, then hot tapping. Split...
Anyone have experience with flow equations for natural gas in a circular pipe flowing around an innerduct (annular flow). Want pressure drop for given flowrate with initial pressure of 10 to 60 psig. Pipe is 1 to 6" IPS plastic, cast iron or steel. Innerduct is plastic 1/8" to...
Anyone have experience with flow equations for natural gas in a circular pipe flowing around an innerduct (annular flow). Want pressure drop for given flowrate with initial pressure of 10 to 60 psig. Pipe is 1 to 6" IPS plastic, cast iron or steel. Innerduct is plastic 1/8" to...
