The Development of Stainless Steel Weld Overlaying for Continuous Digesters

We have developed an overlay method for continuous digesters that substitutes the lining of stainless steel plates. We carried out the overlay (110 m2) at the NKP Continuous Digester in Daio Paper Co., Ltd. in March this year.The superior points of our overlay method are the high welding quality achieved by using new automatic welding machines, the short term of the work and the high safety level for assembly, inspection and dismantling that employed an automatic scaffolding system.Our method of overlay is capable of preventing corrosion of the welded parts that stainless steel lining plates have and corrosion of the cladding of continuous digesters.