Some of the managers who have been arrested include the head of procurement Vincent Cheruiyot and legal officer Gloria Khafafa.
The search for other managers implicated in the Sh1 billion scam is still ongoing.
Sang and the other suspects are being held at the Muthaiga police station.
The arrests started last night after the Director of Public Prosecutions Noordin Haji approved various charges against them.
The Director of Criminal Investigations George Kinoti then ordered his officers to round up all those to be charged.
Sang submitted a letter to the KPC board on Wednesday indicating that he would not be seeking a new term as Managing Director next year.
KPC is no doubt one of the corporations riddled with mega corruption scandals that have seen billions of taxpayers’ money either stolen or misappropriated.
The series of scandals kicked off during the 2013/14 financial year when KPC tendered to deliver 60 hydrant pit valves for Jomo Kenyatta International Airport at a cost of Sh647 million.
Hydrant pit valves are gadgets used for refuelling aircrafts.