The Greens have won Coalition support for a Senate inquiry into Labor’s gas market intervention, which the environmental party say has let “powerful corporations off the hook” by exempting some from an investment-stifling price cap.

The minority party-instigated move to review the newly regulated mandatory code of conduct is at least partially aimed at Senex’s South Korea and Gina Rinehart-backed Atlas gas project in Queensland, for which the company is asking regulators to waive a $12 per gigajoule price cap in return for only supplying the domestic market.