UPDATE 3-Qatar signs 27-year deal with China as LNG competition heats up

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Kaabi says talks with other Chinese, European buyers ongoing

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Says buyers may take up to a 5% stake in expansion

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Says deal signals importance of secure long-term supply

(Adds pricing mechanism details, quotes)

By Andrew Mills and Maha El Dahan

DOHA, Nov 21 (Reuters) – QatarEnergy has signed a 27-year deal to supply China’s Sinopec with liquefied natural gas (LNG), the longest such LNG agreement so far as volatile markets drive buyers to seek…