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S9086-CH-STM-010/CH-074R4
REVISION 4
NAVAL SHIPS’ TECHNICAL MANUAL
CHAPTER 074 - VOLUME 1
WELDING AND ALLIED
PROCESSES
THIS CHAPTER SUPERSEDES CHAPTER 074 VOLUME 1, DATED 31 JULY 1998
DISTRIBUTION STATEMENT C: DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT
AGENCIES AND THEIR CONTRACTORS; ADMINISTRATIVE AND OPERATIONAL USE
(31 JANUARY 1992). OTHER REQUESTS FOR THIS DOCUMENT WILL BE REFERRED
TO THE NAVAL SEA SYSTEMS COMMAND (SEA-03M2).
WARNING: THIS DOCUMENT CONTAINS TECHNICAL DATA WHOSE EXPORT IS
RESTRICTED BY THE ARMS EXPORT CONTROL ACT (TITLE 22, U.S.C., SEC. 2751, ET
SEQ.) OR EXECUTIVE ORDER 12470. VIOLATIONS OF THESE EXPORT LAWS ARE
SUBJECT TO SEVERE CRIMINAL PENALTIES. DISSEMINATE IN ACCORDANCE WITH
PROVISIONS OF OPNAVINST 5510.161, REFERENCE (JJ).
DESTRUCTION NOTICE: DESTROY BY ANY METHOD THAT WILL PREVENT DISCLO-
SURE OF CONTENTS OR RECONSTRUCTION OF THE DOCUMENT.
PUBLISHED BY DIRECTION OF COMMANDER, NAVAL SEA SYSTEMS COMMAND.
23 AUG 1999
TITLE-1
@@FIpgtype@@TITLE@@!FIpgtype@@
S9086-CH-STM-010/CH-074R4
Certification Sheet
TITLE-2
S9086-CH-STM-010/CH-074R4
TABLE OF CONTENTS
Chapter/Paragraph
Page
074
VOLUME 1
WELDING AND ALLIED PROCESSES
......................
74-1
SECTION
1
INTRODUCTION
....................................
74-1
074-1.1
GENERAL
.........................................
74-1
074-1.1.1
SCOPE.
......................................
74-1
074-1.1.2
MANDATORY REFERENCING.
........................
74-1
074-1.1.3
NUCLEAR AND COMBAT WEAPONS SYSTEMS.
.............
74-1
074-1.1.4
SHIP STRUCTURE AND SYSTEMS.
.....................
74-1
074-1.1.5
RESPONSIBILITY FOR COMPLIANCE.
...................
74-1
074-1.1.6
REQUIREMENTS.
................................
74-1
074-1.2
WELD CATEGORIES
...................................
74-2
074-1.3
REFERENCE DOCUMENTS
...............................
74-2
074-1.3.1
GENERAL.
....................................
74-2
074-1.3.2
MANDATORY REFERENCE DOCUMENTS.
.................
74-5
074-1.3.3
GUIDANCE DOCUMENTS.
..........................
74-6
074-1.4
DEFINITIONS
.......................................
74-6
SECTION
2
QUALIFICATION REQUIREMENTS
........................
74-7
074-2.1
INTRODUCTION
.....................................
74-7
074-2.2
WELDING, BRAZING, AND THERMAL SPRAYING PROCEDURE AND
PERFORMANCE QUALIFICATIONS
........................
74-7
074-2.2.1
INTRODUCTION.
................................
74-7
074-2.2.2
MILITARY ACTIVITIES OTHER THAN SHIPYARDS.
...........
74-7
074-2.2.3
APPROVAL AGENCIES.
............................
74-8
074-2.2.4
CIVILIAN PERFORMANCE QUALIFICATIONS.
..............
74-8
074-2.2.5
NONDESTRUCTIVE TESTING QUALIFICATIONS.
............
74-8
074-2.2.6
MILITARY PERFORMANCE (WELDER) QUALIFICATION.
.......
74-8
074-2.2.6.1
Initial Qualification.
.........................
74-8
074-2.2.6.2
Specific Qualification.
........................
74-8
074-2.2.6.3
Validation of Qualification.
.....................
74-8
074-2.2.6.4
Welding Navy Enlisted Classification Code Achievement.
....
74-8
074-2.2.7
NAVY ENLISTED CLASSIFICATION TEST REQUIREMENTS.
......
74-9
074-2.2.7.1
Completion of Tests.
.........................
74-9
074-2.2.7.2
Welding Limitations.
........................
74-9
074-2.2.8
COURSE A-701-0025, BASIC WELDING.
..................
74-9
074-2.2.9
COURSE A-701-0026, NEC 4954, GENERAL MAINTENANCE WELDER.
.........................................
74-9
074-2.2.9.1
Minimum Requirements.
......................
74-9
074-2.2.9.2
Weld Categories.
........................... 74-10
i
S9086-CH-STM-010/CH-074R4
TABLE OF CONTENTS
- Continued
Chapter/Paragraph
Page
074-2.2.10
COURSE A-701-0027, NEC 4955, NON-NUCLEAR WELDER.
...... 74-11
074-2.2.11
EXTENT OF QUALIFICATION.
........................ 74-12
074-2.3
UNDERWATER WELDING AND NDT QUALIFICATION
.............. 74-12
074-2.4
MILITARY RECORDS
.................................. 74-12
074-2.4.1
QUALIFICATION TEST RECORDS.
...................... 74-12
074-2.4.2
VISION TEST RECORDS.
........................... 74-12
074-2.4.3
PERSONNEL SERVICE RECORD ENTRIES.
................. 74-13
074-2.4.4
QUALIFICATION MAINTENANCE.
...................... 74-13
074-2.4.5
RENEWAL OF QUALIFICATIONS.
...................... 74-13
074-2.4.6
EQUIPMENT QUALIFICATION.
........................ 74-13
SECTION
3
QUALITY ASSURANCE
................................ 74-13
074-3.1
INTRODUCTION
..................................... 74-13
074-3.2
MATERIALS REQUIREMENTS AND CERTIFICATION
............... 74-13
074-3.3
WELDING MATERIAL CONTROL
........................... 74-14
074-3.4
INSPECTION AND RECORDS
............................. 74-14
074-3.4.1
CATEGORY A AND C WELDS.
........................ 74-14
074-3.4.2
CATEGORY B WELDS.
............................. 74-14
074-3.4.3
EMERGENCY WELDS.
............................. 74-14
074-3.4.4
CATEGORY D WELDS.
............................. 74-15
074-3.4.5
Category E and F welds.
............................. 74-15
SECTION
4
WELDING AND BRAZING REQUIREMENTS
................... 74-15
074-4.1
INTRODUCTION
..................................... 74-15
074-4.2
GENERAL REQUIREMENTS
.............................. 74-15
074-4.3
WELDING IN WAY OF WETTED SURFACES
.................... 74-15
074-4.4
TEMPERATURE-INDICATING CRAYONS
...................... 74-16
074-4.5
BIMETALLIC BOND
................................... 74-16
074-4.6
WELD DEPOSITS
..................................... 74-16
074-4.7
OXYFUEL GAS CUTTING
............................... 74-16
074-4.8
HOT OR COLD FORMING OF CASTINGS
...................... 74-16
074-4.9
PREPARATION OF FULL PENETRATION DOUBLE BEVEL WELD JOINT
DESIGNS
........................................ 74-17
ii
S9086-CH-STM-010/CH-074R4
TABLE OF CONTENTS
- Continued
Chapter/Paragraph
Page
074-4.10
REDUCED SOCKET DEPTH
.............................. 74-17
074-4.11
REDUCED COUNTERBORE DEPTH
......................... 74-17
074-4.12
BRAZING
......................................... 74-17
074-4.13
ALLIED PROCESSES
.................................. 74-17
074-4.13.1
RESISTANCE WELDING.
............................ 74-17
074-4.13.2
METALLIZING.
................................. 74-18
074-4.13.3
ELECTROPLATING.
............................... 74-18
074-4.13.3.1
Selective Electroplating.
....................... 74-18
074-4.13.3.2
Shaft Electroplating.
......................... 74-18
SECTION
5
STRAY CURRENT PROTECTION
.......................... 74-18
074-5.1
UNDERWATER CORROSION
.............................. 74-18
074-5.2
CURRENT FLOW
..................................... 74-18
074-5.3
WELDING EQUIPMENT REQUIREMENTS
...................... 74-19
074-5.4
GROUNDING CONNECTIONS
............................. 74-19
074-5.4.1
CABLE LUGS.
.................................. 74-19
074-5.4.2
CABLE SIZE.
................................... 74-19
074-5.4.3
RESISTANCE.
.................................. 74-22
074-5.5
WELDING UNIT ARRANGEMENTS
.......................... 74-23
074-5.6
SPECIAL PRECAUTIONS
................................ 74-35
074-5.6.1
GENERAL.
.................................... 74-35
074-5.6.2
WELDING CURRENT.
............................. 74-35
074-5.6.3
SPLITTING GROUND RETURN CABLES.
.................. 74-35
074-5.6.4
RESISTANCE CHECKS.
............................. 74-35
074-5.6.5
LOCATION OF GROUND RETURN CABLES.
................ 74-35
SECTION
6
SURFACE SHIP HULL STRUCTURE
........................ 74-35
074-6.1
HULL MATERIAL REPLACEMENT
.......................... 74-35
074-6.1.1
GENERAL.
.................................... 74-35
074-6.1.2
HY-80 AND HY-100 STEEL.
.......................... 74-36
074-6.1.3
ALUMINUM ALLOY 6061-T6.
......................... 74-36
074-6.2
STEEL SONAR DOMES
................................. 74-36
074-6.3
REPAIR OF MECHANICAL FASTENERS
....................... 74-36
074-6.4
DUCTILE METAL OVERLAY TO ARREST CRACKS IN SHIP PLATES
..... 74-37
iii
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