API Plan 76
API Plan 76 – Leakage Collection for Condensable Vapours
API Plan 76 is a leakage management system specifically designed for single gas seals handling condensable vapours.
It directs the vapor leakage from the seal to a condensation system or flare to prevent unsafe build up and environmental contamination. This plan is commonly used in applications where process vapours need controlled venting.
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Features
How It Works:
- Vapor leakage from the seal is collected through a vent line.
- The vapor is routed to a condensation system, flare, or safe disposal system.
- A flow monitoring device may be installed to track leakage rates.
- The system prevents process vapor accumulation around the seal chamber, enhancing safety and efficiency.
Benefits
- Prevents vapor accumulation – Reduces the risk of hazardous or flammable gas build up.
- Improves environmental compliance – Ensures safe handling of emissions.
- Simple and cost-effective – Requires minimal components compared to complex gas handling systems.
- Enhances safety – Reduces the risk of gas leaks near personnel and equipment.
Drawbacks
- Limited to specific applications – Only suitable for condensable vapours; not effective for liquid or non-condensing gases.
- Potential pressure control issues – Improper venting could cause backpressure, affecting seal performance.
- Requires proper routing – Vapours must be safely disposed of or condensed, adding operational complexity.
- Not suitable for high-leakage applications – If leakage rates are too high, a more advanced vapor recovery system may be required.
Applications
Common Applications:
- Oil & Gas Industry – Used in pumps handling volatile hydrocarbons to prevent hazardous vapor leaks.
- Petrochemical & Chemical Processing – Applied in pumps transferring condensable chemicals where vapor control is necessary.
- Refineries – Utilized in single gas seals on light hydrocarbon services.
- LNG & Cryogenic Applications – Helps manage vapor leakage in liquefied gas handling systems.
- Power Generation – Used in steam turbine seal systems to control vapor emissions.
API Plan 76 is an effective leakage management solution for single gas seals, ensuring safe and controlled venting of condensable vapors while maintaining environmental and operational safety.
Warning Notes
Related Technical Papers
Applicable Products
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