L&T develops alternative to gas flares for Assam oil field

Larsen & Toubro said its valve division supplied India’s first indigenously-developed High Integrity Pressure Protection System to Dirok Gas Field Development Project in Assam.

“Conventionally, spikes in pressure are managed by venting or flaring excess fluids. 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,” it said.

The project is promoted by a consortium of Hindustan Oil Exploration Company (HOEC), Oil India Limited (OIL), and Indian Oil Corporation Limited (IOCL).

HIPPS is a safety instrumented system (SIS) designed to protect oil & gas production, refining and pipeline systems against over-pressurization.

The system 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. Further, partial stroke testing (PST) capability of the system provides real time diagnostics,” it said.

Larsen & Toubro is an Indian multinational engaged in technology, engineering, construction, manufacturing and financial services with USD 16 billion in revenue.