Line · Pipelines
Transmission Line
Large diameter pipelines that move oil, products or gas over long distances, usually from processing or storage to end markets.
What it does
Carry high volumes between regions and across borders. Lines that cross a provincial or international boundary are regulated in Canada by the Canada Energy Regulator, which adopts CSA Z662 as the design and operation standard.
Basics
| Diameter | Large |
| Distance | Long, between regions or countries |
| Regulator (Canada) | CER when it crosses a provincial or international boundary |
| Standard (Canada) | CSA Z662 Oil and Gas Pipeline Systems |
Common failures
- Third party damage from excavation near the right of way
- External corrosion where coating and cathodic protection fail together
Troubleshooting
- Symptom
- Throughput lower than design at the same pressure
- Likely cause
- Deposits, a partly closed valve or a restriction
- What to check
- Run a cleaning pig, check valve positions and pressure profile along the line