The phrase "a main pipeline" is correct and usable in written English.
It can be used in contexts related to processes, systems, or infrastructure, particularly in fields like engineering, data management, or project planning.
Example: "The team is currently working on a main pipeline to streamline data flow between departments."
Alternatives: "a primary pipeline" or "a central pipeline".
Only the Chinese have managed to wangle a special concession and also to build a pipeline.The main pipeline from Turkmenistan goes through Russia.
Because Univision has a stranglehold on the main pipeline of telenovelas, from Mexico, the search for programming took Telemundo to Brazil.
But the schedule for pipeline construction, to be done by the end of 2008, refers only to an initial section from Taishet to Skovorodino a stone's throw from the Chinese border.The Japanese say that they would be content for the Chinese to get a spur from the main pipeline, but insist that their branch be built first.
4. Branched off from the main pipeline, a pig-launcher is attached.
Exports are set to increase as two new pipeline systems open additional routes to the Baltic Sea and Black Sea this year, and a new extension links a Ukrainian port to Russia's main pipeline.
Their operation in Hinkley is a natural gas compressor station along its main pipeline, which moves gas from Texas mostly to Northern California.
The foreign minister, Francisco Tudela, resigned.Having blown up a main oil pipeline and shot down a helicopter-load of soldiers sent to protect repair work, Colombian guerrillas blew it up again four days later and killed ten more soldiers.
The tax, imposed after Russia doubled the price of gas supplies to Belarus, had prompted Russia to shut down a main oil pipeline to European Union countries, causing renewed alarm about Russia's reliability as an energy supplier.
Over the last few months – as Peru helped guide the United Nations climate negotiations – five separate oil spills along a main oil pipeline through the Amazon have spewed thick black clots of crude across jungle and swamp and carpeted local fishing lagoons with dead fish.
