Online Hot Tapping & Plugging – Engineering Introduction
Plant debottlenecking and upgrading may involve a lot of hot work and new tie-ins on existing facilities. To facilitate safe construction of new tie-ins or replace old pipelines, conventionally the existing system will needs to be shutdown and decommission to allow safe hot work. Production loss and inventory loss will incur a large cost for a simple modification. Hot tapping and line plugging technique would facilitate construction of new hot tap or replace pipelines while allowing continue production and zero inventory loss.
Hot Tapping
Usage
Online hot tapping on the pipeline
Dimension
Φ12-Φ2000
Applied pressure
0-10Mpa
Applied temperature
-30℃-330℃
Applied pipeline
Carbon steel pipe, manganese steel pipe, stainless steel, gray, ductile iron pipe, PVC pipes, pre-stressed pipe, the X series of West-East Gas Transmission Pipe
Perforation method
Manual or Hydraulic (can be equipped with hydraulic power connector)
Line Plugging
Usage
On a variety of pipelines with high temperature and high pressure
Dimension
Φ12-Φ1000
Applied pressure
0-10Mpa
Applied temperature
-30℃-280℃
Applied mediums
Water, steam, oil, refined oil, natural gas, gas, etc. Almost all mediums
Special requirements
High temperature and high pressure, alloy material, stainless steel and other special process of opening a special sealing
Online hot tapping & line plugging technique
Add bypass without stopping the pipeline
Replace or add new taps or pipelines without stopping or emptying lines
It is secure and reliable on pipeline modification involved inflammable, explosive, toxic and hazardous liquid / gaseous media transmission
Online Hot Tapping & Line Plugging – Operation Diagram
1. Weld the tee-pack, tee by-pass and balance pipe on the pipeline.
2. Install proper splint valves or standard valves fitting for based on pressure levels.
3. Install hot tapping machines and open bypass hole.
4. Install bypass pipelines to make flowing medium flow through, open balance holes and plugging holes.
8. Install blind plates on the tee.
7. After plugging, remove plugging joint, shut the flange of tee and dismantled the temporary valve.
6. After blocking the pipeline, cut off the leak piece and blind plates, then replace with new pipelines valves.
5. Install plugging machines, block both upper and lower sides to ensure the medium flow through the bypass pipelines.
Online Hot Tapping & Line Plugging – Tools and case study
Online Hot Tapping & Plugging – Engineering Introduction
