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SP0178-2007 <br />Inside of Tank or <br />Vessel Grind Smooth <br />Elr3 <br />Inside of Tank or <br />Vessel <br />DO <br />Rough <br />Pinhole <br />l Undercut <br />Eli:3\ <br />DON'T <br />FIGURE A2 <br />All joints shall be continuous full -penetration porosity -free welds. In tanks and vessels that require a 100% holiday -free lining, all <br />welds must be smooth with no holes, high spots, lumps, or pockets. Grinding is required to eliminate sharp edges and high <br />spots. Weld metal shall be used to fill in undercut or pits. <br />DO <br />Inside of Tank <br />or Vessel <br />DON'T <br />FIGURE A3 <br />All weld spatter shall be removed. <br />6 NACE International <br />