East Java Gas Pipeline - Indonesia

The Site

This is a dry gas pipeline which delivers gas from the central processing plant at Pagerungan Besar Island via submarine pipeline to the onshore receiving facility at Porong and from there to seven other branch facilities. The gas pipeline facilities include pig launching and receiving facilities, slug catchers and associated pressure control valves, metering skids for total received gas and metering for all hydrocarbon outlets such as flare and blowdown lines.

The System

System Software

RealFlex Windows Software is used for the SCADA system. QNX, the fast responding operating system provides the platform to efficiently manage I/O requirements, mandatory in the operation of a gas pipeline. RealFlex is a multi-tasking, multi-user SCADA package that handles all operations including alarming, reporting, event logging as well as historical data recording.

System Operation

The SCADA system consists of a master station with nine redundant CAC 6532 remote terminal units (RTUs) and one redundant local 6532 RTU. The master station consists of three consoles each with two computer stations. The CPUs are networked together using the ARCNET LAN. One of the CPUs is the designated "primary" computer and the other "secondary" computer. The secondary CPU is configured as a "hot-standby" CPU. Two of the consoles are intended for operations and a third console will be used for engineering and administrative purposes. The master station is located at the onshore receiving facility at Porong.

Prior to shipping, the entire system was staged, tested, and put through a comprehensive, factory acceptance test procedure at eP's facility in Kingwood, Texas.

Communication System

The communication network design consists of redundant microwave and satellite based telemetry systems. Communication links are fourfold - one is a direct RS-232 link to two local RTUs, a second is a link via satellite to communicate with the RTU at Besar Island 350-kilometers away, a third is a point-to-point digital microwave link and the fourth is a point-to-multipoint digital microwave link. The system is capable of up to 16 individual communication paths.

The communication system includes a digital telephone system (DPABX), intercom, and alarm system at each RTU site.