UPDATE 3-US, Vietnam agree to boost trade, tariffs on some Vietnamese goods may be removed

* U.S. Vietnam agreed to framework for trade deal * U.S. to maintain 20% tariff on some products, while identifying products for 0% tariff * U.S., Vietnam to work to finalise trade deal in coming weeks * U.S. Vietnam to address non-tariff barriers * Jan-Sept bilateral trade up 27% y/y to $126.4 bln (Recasts paragraph 1; adds details in paragraphs 2, 13-17) By Khanh Vu and Mikhail Flores HANOI/KUALA LUMPUR, Oct 26 (Reuters) – The United States and Vietnam will finalise a trade agreement in the coming weeks that will maintain 20% tariffs on most Vietnamese goods but lift duties on certain products that will be decided at a later stage, the White House said on Sunday. In return Vietnam committed to offering "preferential access" for most all U.S. goods. The two countries have agreed to a fram