Chasing 146 runs, Reliance 1 was without the services of key player Virender Sehwag, but managed the task with the help of Shikhar Dhawan's 48 in 43 balls.
The victorious team, however, started the run-chase with a stutter, as they lost skipper Parthiv Patel (20) and Jalaj Saxena (10) cheaply to Sanjay Mahajan.
Dhawan, who hit five boundaries in his knock, was run out while looking for a quick single. Yusuf Pathan and Amitoze Singh then forged a 44-run stand for the fifth wicket to guide their team home.
State Bank of Patiala was earlier bundled out for 145.
The other quarter-final match between Western Railway and BPCL turned out to be low scoring affair. The Railways team registered a comprehensive six-wicket victory over their rivals with two overs to spare.
Brief Scores:
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Reliance 1: 147/5 in 19.1 overs (Shikhar Dhawan 48, Yusuf Pathan 22, Amitoze Singh 20 not out; Sanjay Mahajan 2-22 Rajiv Sirhindi 1-20, Siddharth Kaul 1-28) bt State Bank of Patiala 145 all out in 20 overs (Rajiv Sirhindi 41, Jaskaran Singh 31, Vishwas Bhalla 26; Pawan Suyal 1-15, Rishi Dhawan 3-25, Baltej Singh 2-18, Yuzvendra Chahal 1-35) by 5 wickets.
Western Railway: 105/4 in 17.4 overs (Rohan Srivastava
51, Rohan Bhosale 18; Rajesh Verma 1-7, Bhavin Thakkar 1-4) bt BPCL 103/10 in 19.5 overs (Gaurav Jathar 20, Onkar Khanvilkar 17; Sonu Batham 4-21, Hardik Rathod 3-20) by 6 wickets.