Hello,
I apologize if this is not the correct forum, but I was hoping to lean on some potential pigging experience to find a solution to my problem. The problem I have is an unbarred bypass connection on our receiver installation.
Nominal Line Size: 12"
Receiver Barrel: 16"
Bypass Line: 8" Unbarred
Product: Natural Gas
We attempted a pigging inspection in 2024 which was the first ever pigging operation of this line. We decided to begin this inspection using foam cleaning pigs since the amount of pipeline debris was unknown, and wanted to ensure a clean enough pipe for the smart tool. During this foam pig run, the foam tool traveled the line as expected, but once it entered the receiver barrel, entered the receiver bypass line and became stuck. I know a barred bypass connection would be the solution to our problem, but we do not have the time to complete the replacement prior to our plan for a 2025 re-run.
Now for my question: Has anyone seen any type of tube/sleeve used as a "pseudo barred tee" in the receiver barrel? I have seen these "bird cage" style designs have been used in the pigging industry to increase the length of nominal pipe (to ensure clearance from the isolation valve), but curious if anyone has any experience using such devices or if anyone has any possible solutions to act like a barred tee at the receiver bypass to prevent any tools from entering/being damaged.
I apologize if this is not the correct forum, but I was hoping to lean on some potential pigging experience to find a solution to my problem. The problem I have is an unbarred bypass connection on our receiver installation.
Nominal Line Size: 12"
Receiver Barrel: 16"
Bypass Line: 8" Unbarred
Product: Natural Gas
We attempted a pigging inspection in 2024 which was the first ever pigging operation of this line. We decided to begin this inspection using foam cleaning pigs since the amount of pipeline debris was unknown, and wanted to ensure a clean enough pipe for the smart tool. During this foam pig run, the foam tool traveled the line as expected, but once it entered the receiver barrel, entered the receiver bypass line and became stuck. I know a barred bypass connection would be the solution to our problem, but we do not have the time to complete the replacement prior to our plan for a 2025 re-run.
Now for my question: Has anyone seen any type of tube/sleeve used as a "pseudo barred tee" in the receiver barrel? I have seen these "bird cage" style designs have been used in the pigging industry to increase the length of nominal pipe (to ensure clearance from the isolation valve), but curious if anyone has any experience using such devices or if anyone has any possible solutions to act like a barred tee at the receiver bypass to prevent any tools from entering/being damaged.
