Morgan, a 28-year-old former world junior champion from Southend, compiled only the fourth 146-break ever witnessed in professional competition.
After potting the opening 12 reds with 12 blacks, Morgan looked set to construct a maximum, but he suffered a kick in sinking the 13th red which left him with an extremely difficult thin clip on the black. He decided to pot a much simpler pink to a middle pocket, from where he cleared the table.
He is only the third player to secure a 146 after Stephen Hendry, who has recorded two, and James Reynolds, a 17-year-old from Pontypridd who made his in a preliminary round of the German Open at the weekend.
Morgan now faces Mick Price in the final qualifying round on Tuesday, with a place in the 32-man concluding stages of the event in Bangkok at stake.
Grimsby's Dean Reynolds, down to 38th in the world rankings after a series of dismal results over the past two years, pulled off a stirring fightback as he beat Mark Davis 5-4 after trailing 4-0.Reuse content