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Inspection needed to be done when welding and repairing the support roll of stainless steel water tank

Release date: May 30, 2020 Number of visits: four hundred and forty-six

    Stainless steel water tank Inspection of roll blank before welding: the backup roll blank to be repaired by surfacing welding shall be compared with the data on the certificate, and the quality and size of roll diameter shall be checked after verification. When the temperature of the welding layer is lower than that of the temperature of the preheating layer, the temperature of the welding layer should be kept lower than that of the temperature of the preheating layer.


Welding parameter inspection: during surfacing, the welding speed, arc voltage, welding current, weld bead forming and size, head moving speed, distance before welding arc guide and other parameters shall be checked and filled in the record form.


 Stainless steel water tank

Appearance quality inspection: during surfacing, the appearance quality of surfacing layer should be inspected to see whether there are cracks, slag inclusion, air holes, undercut and other defects. If there are defects, they should be treated in time.


Post weld inspection: after welding, macroscopic inspection, dimensional inspection and quality inspection of surfacing layer shall be carried out. If there are no defects and enough allowance is made for surfacing layer, PWHT can be carried out. After heat treatment, the roll surface shall be turned, and then the surface hardness, appearance and dimension shall be inspected.


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eighteen billion six hundred and thirty-seven million three hundred and two thousand and ninety-nine