L&T Valves has supplied India’s first indigenously-developed high integrity pressure protection system (HIPPS) to Dirok gas field development project in Assam, India.
The project is promoted by a consortium of Hindustan Oil Exploration Co., Oil India, and Indian Oil Corp.
HIPPS is a safety instrumented system (SIS) designed to protect oil and gas production, refining, and pipeline systems against over-pressurisation.
Conventionally, spikes in pressure are managed by venting or flaring excess fluids, but HIPPS is a smarter alternative that detects and isolates the source of high pressure within seconds.
By avoiding discharge, HIPPS averts potential harm to people, facilities, and the environment.
The SIL-3 capable HIPPS, supplied to Dirok gas gathering station, has at its core two 12” Class 1500 fire-safe hydraulically-actuated metal-seated ball valves with 1oo2 voting logic.
A solid-state logic solver, explosion-proof pressure transmitters (2oo3), high integrity manifolds, and control panels complete the HIPPS assembly.
Redundancy is built in at multiple levels to enhance availability and reliability, and partial stroke testing capability of the system provides real time diagnostics.