Samoa weathered a spirited PNG fightback in the second half to record a resounding victory in east Hull.
Jessie Joe Nandye charged over after a good run from Josiah Abavu six minutes after the interval but that unconverted try was all that PNG could offer.
Midway through the second period Sauaso Sue reached over to score by the posts with man of the match Anthony Milford adding the conversion.
David Mead had a try chalked off for an obstruction offence in the build-up before Antonio Winterstein touched down a Ben Roberts kick to record a hat trick in front of a 6,871 strong crowd.