DEFSTAN 02-770(PT1)/1(2000) : 2000

TITLE PAGE
SCOPE
FOREWORD
Sponsorship
Conditions of Release
General
MOD Tender or Contract Process
Related Documents
Health and Safety
Warning
CONTENTS
SECTION 1 - WELDER QUALIFICATION
            1.1 General
            1.2 Qualification Groups
            1.3 Qualification Test Welds
            1.4 Examination of Test Welds
                1.4.1 Butt Welds
                1.4.2 Fillet Welds
                1.4.3 T-Butt Welds
                1.4.4 Group 4 and Group 5 Welds
            1.5 Acceptance Standards
SECTION 2 - WELDING PROCEDURES
            2.1 General
            2.2 Written Weld Procedure
            2.3 Procedure Information for Fusion Welds
            2.4 Procedure Information for Stud Welds
SECTION 3 - QUALITY CONTROL
            3.1 General
            3.2 Supervision and Inspection Requirements
                (See Section 9 for Post-Weld Inspection)
SECTION 4 - FABRICATION
            4.1 General
            4.2 Preparing Plate Edges
            4.3 Edge Preparation
            4.4 Welding on Coated Structure
            4.5 Surface Marks
            4.6 Cold Working
            4.7 Hot Working
            4.8 Stress Relieving
            4.9 Heat Treatment Furnaces
            4.10 Temporary Attachments
SECTION 5 - WELDING REQUIREMENTS
            5.1 General
            5.2 Welding Consumables
            5.3 Welding Sequence
            5.4 Cleaning
            5.5 Deposition Procedure
            5.6 Back Gouging
            5.7 Flushing or Weld Dressing
            5.8 Buttering or Build-up by Welding
            5.9 Crossing of Butt-Welds by Fillet or T-Butt Welds
            5.10 Stud Welding
            5.11 Welding Dissimilar Steels
SECTION 6 - CARE AND STORAGE OF WELDING CONSUMABLES
            6.1 General
            6.2 Studs
            6.3 Fusion Welding Consumables
            6.4 Baking
SECTION 7 - PREHEAT, INTERPASS TEMPERATURE, HEAT INPUT AND
            POST-HEAT
            7.1 General
            7.2 Preheat and Interpass Temperature
            7.3 Method of Preheating
            7.4 Torch Heating
            7.5 Application of Preheat
            7.6 Control of Interpass Temperature
            7.7 Temperature Checks
            7.8 Preheat Temperature Measurement
            7.9 Interpass Temperature Measurement
            7.10 Heat Input
            7.11 Post Weld Heat Treatment
SECTION 8 - T-BUTT WELDS TO PRESSURE HULL
            8.1 General
            8.2 Undercut
            8.3 Repair by Welding
            8.4 Welding Sequence
            8.5 Surface Grinding
SECTION 9 - NON-DESTRUCTIVE EXAMINATION OF WELDS
            9.1 General
            9.2 Methods
            9.3 Structural Welds
            9.4 Repair of Defects by Welding
            9.5 Stud Welding
            9.6 Dissimilar Metal Joints and Weld Metal Cladding
SECTION 10 - REPAIR BY WELDING OF HSS CASTINGS
             10.1 Welding Requirements
             10.2 Post-Weld Stress Relief
             10.3 Repair Limitations
             10.4 Non-Destructive Examination Requirements
             10.5 Acceptance Standards
             10.6 Marking of Areas Repaired by Welding
SECTION 11 - REPAIR BY WELDING OF DEFECTS IN HSS STRUCTURAL
             STEEL JOINTS
             11.1 General
             11.2 Repair of Non-Lamellar Defect Types
             11.3 Repair of Defects Involving Lamellar Tearing
             11.4 Non-Destructive Examination Requirements
             11.5 Acceptance Standards
ANNEX A - RELATED DOCUMENTS
ANNEX B - DEFINITIONS AND ABBREVIATIONS
ALPHABETICAL INDEX

States the general requirements and information on the fabrication, welding and inspection requirements for structures and associated components produced in High Strength Steels (HSS) i.e. Q1N, Q2N, QT35 and HY80.