Specifications - City of Montpelier, Vermont

Montpelier District HeatingCity of Montpelier, VTIssue Date:September 28, 2012Title:APPENDIX A – Welding and Testing RequirementsPage #:12 of 22Base Metal ThicknessUp to 1/8 inclusive 3/32"Over 1/8 to 3/16, inclusive 1/8"Over 3/16 to 1/2, inclusive 5/32"Over 1/2 to 1, inclusive 3/16"Max. Reinforcement Thickness14.12.4 The thickness of weld reinforcement shall be based on the thicknessof the thinner of the materials being joined.14.12.5 The weld reinforcement thickness shall be determined from the higherof the abutting surfaces involved.14.12.6 Weld reinforcement may be removed if so desired.4.13 Fillet Welds:14.13.1 Fillet weld configurations shall be in accordance with AWS provisions.14.13.2 DELETED15.0 WELD IDENTIFICATION15.1 The weld identification method to be used for the Project shall be in the form ofan “isometric” drawing showing the location of all welds with the correspondingwelder I.D. for each weld The Welding Isometric Drawing shall be included withthe Final Records and submitted to the Engineer at the conclusion of the project.15.2 After completion of a weld joint, the welder shall identify his work in the mannerspecified by the erecting CONTRACTOR.16.0 POSTWELD HEAT TREATMENT16.1 The permissible temperature range and minimum holding time for postweld heattreatment shall be in accordance with Table 132 of ANSI B31.1, except asmodified by Table 132.1 of ANSI B31.1.16.2 Where postweld heat treatment is required, it shall be included in the qualifiedwelding procedure.17.0 INSPECTION17.1 Visual inspection of the weld joint and weld shall be done in an area wheresuitable light is available. The use of spotlights, magnifiers, or other inspectiondevices is recommended whenever such devices will enhance the inspectionoperation.17.2 Joints shall be visually inspected prior to welding for compliance with thisSpecification and the released welding procedure for items such as cleanliness,correct groove configuration, alignment, conditions of tack welds if present, thepreheat temperature if specified filler metals to be used, etc.17.3 The welds shall be visually inspected after each pass of multi-pass welds toassure that the weld bead has been properly cleaned of slag, and is free ofsurface cracks, porosity, excessive convexity, undercut, and other defects.Noted defects shall be removed prior to making the next weld pass.17.4 Complete welds shall be visually inspected by a qualified weld inspector for thefollowing:17.4.1 Weld Shape and Appearance:APPENDIX APage A12