#multi-products

Objective of the Commissioning

to bring the constructed / installed system to deliver the desired function

the pipeline commissioning means introducing crude/product/gas in the pipeline from originating station, filling the entire length and then start delivering to receipt system

What We Need Prior to Commissioning?

The pipeline and associated facilities are completed in all respect

All Fire and Safety equipments / facilities are tested and commissioned

Availability of dedicated communication

Statutory Clearances obtained

Availability of Product (HSD)/ Crude oil – Not less than line-fill

Required Manpower is placed at all locations

Availability of water and its disposal plan

Availability of a dedicated commissioning team

Critical Issues in Commissioning a Petroleum Pipeline

Movement of hydrocarbon in empty pipeline can generatestatic current

Hydrocarbon Vapor mixed with oxygen may lead to explosion

There may be formation of Air / Vapor pocket that may get compressed leading to rise in pressure

Air / vapor pocket may explode in receiving tank leading to damage of the tank roof seal

Leakage of any hydrocarbon may lead to fire or damage to environment

Commissioning of a Multi-Products Pipeline

Ensure the pipeline is ready in all respects for the commissioning

Ensure adequate product (HSD) is available for the commissioning (At least more than line-fill of a Pipeline section)

The pipeline or a section of the pipeline is pressurized with air (2 to 3 Kg/Sq-cm)

Pump a water column of about 500 kL to 1000 kL

Launch a Bi-Di Pig followed by 1000 kL to 2000 kL water

Launch second Bi-Di- Pig behind 1000 KL to 2000 KL water

Pump HSD at minimum flow

Track the movement of Pig

Vent the air at receiving end and maintain back pressure 3 to 4 Kg/Sq-cm

Monitor receipt of water at Receiving end – it may be disposed directly in to a protected pit or in a designated tank

Receive Ist Bi-Di Pig

Monitor the quantity and quality of water at receiving end

Receive second Bi-Di Pig

Once diesel or diesel mixed with water arrives, switch over to designated HSD Tank

Observe flow and pressure, once these become stable, the operation may be made normal and the pipeline may be declared as commissioned and handed over to Operation