Introduction
The Uran-Chakan-Shikrapur LPG Pipeline Surge Analysis was conducted for Hindustan Petroleum Corporation Limited (HPCL) to ensure the safety and reliability of their integrated LPG pipeline network. This study, focusing on the pipelines connecting the Uran LPG Bottling Plant to the BPCL LPG Plant in Shikrapur, Maharashtra, is critical in mitigating risks associated with pressure surges in complex pipeline operations.
Scope of the UCSPL Surge Analysis
The study encompassed the entire LPG pipeline network, including:
- The pipeline from Mahul HPCL Refinery to Uran Dispatch Station.
- Spur lines to HPCL Patalganga and HPCL Chakan.
- The primary route from Uran to BPCL Shikrapur Bottling Plant.
Objectives UCSPL Surge Analysis
- Evaluate Pressure Surge: Assess pressure surges during varying operational scenarios in the UCSPL and MUPL pipelines.
- Design Validation: Confirm that the pipelines can withstand pressure surges.
- Propose Mitigation Measures: Develop solutions to address transient surges for long-term pipeline safety.
Understanding Pressure Surges in Pipelines – A pressure surge, or water hammer effect, is caused by a sudden change in fluid velocity, often triggered by:
- Rapid valve closures.
- Pump shutdowns.
- Oscillations in tank levels.
- Other transient operational events.
Surge effects, if unmanaged, can lead to catastrophic pipeline failures, equipment damage, or structural fatigue. Mitigation Techniques Include:
- Designing pipelines with surge-absorbing capacities.
- Gradual valve closure.
- Implementing safety interlocks.
Technical Methodology
- Steady-State Hydraulic Analysis:
- Using advanced simulation software, steady-state models were developed to analyze baseline hydraulic performance.
- Transient Analysis:
- Transient models simulated various scenarios, such as pump trips and valve closures, to predict pressure surges. Results from steady-state analysis provided the foundation for transient assessments.
Conclusions
The analysis verified that the UCSPL LPG pipeline system is inherently safe and capable of withstanding pressure surges under all examined conditions. Existing safety interlocks ensure additional protection during transient operations.
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