Jamal Fakir trundled over to extend their lead before Garreth Carvell and Shaun Berrigan crashed over for Hull.
BBC: Hull 18-30 Catalans Dragons
2.
Meanwhile, Warrington prop forward Garreth Carvell is determined to make the most of being called into England's squad as a replacement for his club-mate Morley.
BBC: James Graham named as England Four Nations captain
3.
And the lead changed hands for a third time on 50 minutes when Garreth Carvell grasped the ball from James Roby and held off the Saints cover in a 70-metre race for the line.