New manufacturing technologies have been introduced by JFE SteelChita Works to increase the availability of seamless pipes with loweras well as higher thicknesses. For rolling the thinner seamless pipes,new plug lubricants and cermet coatings have been developed andthe roll gap control technology has been implemented. For rolling thethicker seamless pipes, a new plug has been designed that allows anew pass schedule through all mills. The quality assurance systemhas been improved with lower frequency ultrasonic waves.