Sukanya lifted an Olympic record 110kg in the snatch and 130kg in the clean and jerk for a total of 240kg, beating the silver medallist by 8kg.
Twenty-six-year-old Pimsiri lifted 102kg in the snatch and jerked 130kg for her total of 232kg to add another silver medal to the one she won at London four years ago.
Kuo Hsing-chun claimed bronze for Taiwan with her combined total of 231kg.
Thailand have dominated the opening days of the weightlifting with four medals, grabbing two golds and a silver in the women’s competition and a bronze in the men’s so far.
The two podium finishes took Thailand to the top of the weightlifting medals table.
Sopita Tanasan claimed gold in the women’s 48kg on Saturday (Aug 6) while Sinphet Kruaithong finished with a bronze in the men’s 56kg the following day.
“I practised so hard. This is my first Olympic Games and I’m really delighted,” Sukanya said, later insisting she”d never been at fault for the doping in the first place.
Pimsiri said Sukanya had paid her dues for the doping offence and insisted she was happy to finish second to the gold medallist, despite her competitor’s previous drug use.
In taking silver, Pimsiri became the third lifter to take multiple medals at 58kg. She also won silver in London four years ago.
“I am so happy to be one of them [medal winners], because we are representing the Thai people and Thailand,” she said of Thailand winning four weightlifting medals.
“There are 60 million people [in Thailand]. We are happy to be a few of the people who can make Thai people happy.”
“Congratulations to her. We work as a team to make Thailand happy. We’re like family so it’s okay for me to finish second,” Pimsiri said.