NAVAL SHIPS’ TECHNICAL MANUAL CHAPTER 074 …

1 NAVAL SHIPS TECHNICAL MANUALCHAPTER 074 - VOLUME 1 WELDING AND ALLIEDPROCESSESTHIS CHAPTER SUPERSEDES CHAPTER 074 VOLUME 1, DATED 31 JULY 1998 DISTRIBUTION STATEMENT C: DISTRIBUTION AUTHORIZED TO GOVERNMENTAGENCIES AND THEIR CONTRACTORS; ADMINISTRATIVE AND OPERATIONAL USE(31 JANUARY 1992). OTHER REQUESTS FOR THIS DOCUMENT WILL BE REFERREDTO THE NAVAL SEA SYSTEMS COMMAND (SEA-03M2).WARNING: THIS DOCUMENT CONTAINS TECHNICAL DATA WHOSE EXPORT ISRESTRICTED BY THE ARMS EXPORT CONTROL ACT (TITLE 22, , SEC. 2751, ETSEQ.) OR EXECUTIVE ORDER 12470. VIOLATIONS OF THESE EXPORT LAWS ARESUBJECT TO SEVERE CRIMINAL PENALTIES. DISSEMINATE IN ACCORDANCE WITHPROVISIONS OF OPNAVINST , REFERENCE (JJ).DESTRUCTION NOTICE: DESTROY BY ANY METHOD THAT WILL PREVENT DISCLO-SURE OF CONTENTS OR RECONSTRUCTION OF THE 4 TITLE-1@@FIpgtype@@TITLE@@!

2 FIpgtype@@PUBLISHED BY DIRECTION OF COMMANDER, NAVAL SEA SYSTEMS AUG 1999 Certification SheetS9086-CH-STM-010/CH-074R4 TITLE-2 TABLE OF CONTENTSC hapter/ParagraphPage074 VOLUME 1 WELDING AND ALLIED AND COMBAT WEAPONS STRUCTURE AND FOR REFERENCE 2 QUALIFICATION , BRAZING, AND THERMAL SPRAYING PROCEDURE ANDPERFORMANCE ACTIVITIES OTHER THAN PERFORMANCE TESTING PERFORMANCE (WELDER) of Navy Enlisted Classification Code ENLISTED CLASSIFICATION TEST of A-701-0025, BASIC A-701-0026, NEC 4954, GENERAL MAINTENANCE OF CONTENTS- A-701-0027, NEC 4955, NON-NUCLEAR OF WELDING AND NDT TEST TEST SERVICE RECORD OF 3 QUALITY REQUIREMENTS AND MATERIAL AND A AND C B D E and F 4 WELDING AND BRAZING IN WAY OF WETTED GAS OR COLD FORMING OF OF FULL PENETRATION DOUBLE BEVEL WELD OF CONTENTS- SOCKET COUNTERBORE 5 STRAY CURRENT EQUIPMENT UNIT GROUND RETURN OF GROUND RETURN 6 SURFACE ship HULL MATERIAL AND HY-100 ALLOY SONAR OF MECHANICAL METAL OVERLAY TO ARREST CRACKS IN ship OF CONTENTS- CORRODED PLATE SURFACES AND DECKHOUSE PATCHES FOR TEMPORARY OPENINGS AND ACCESS PATCHES ON PREVIOUSLY MADE REQUIREMENTS FOR PATCHES AND CLOSURE PATCHES ON MECHANICALLY FASTENED FASTENER Chamber Chamber Support and Hazardous

3 Cables and WELDING PROCEDURE AND Chamber Welding Procedure Chamber Welding Performance Welding Procedure Welding Performance of Dry Chamber and Wet Welding WET NDT PROCEDURE AND OF CONTENTS- DRY CHAMBER NDT PROCEDURE AND of Welding Filler AND WORKMANSHIP WELD ASSURANCE CHAMBER PARTY MONITORING AND Party Party Surveillance Party OR PARTIAL 7 SUBMARINE HULL , ACCESS HOLE CLOSURES AND FOR MAKING PARTIAL CIRCULARITY PATCH DIMENSIONAL AND ALIGNMENT HULL ALLOYS REQUIRING SPECIAL WELDING TECHNIQUES.. CARBON OF BLANKING AND Hull OF CONTENTS- OF PRESSURE HULL REPAIR OF CORRODED STRUCTURE, CORRODED WELDS, ANDFABRICATiON 8 PIPING, PRESSURE VESSELS, AND TO APPROVAL FOR REPAIR OF MAIN PROPULSION AND REPAIR WELDING OF BRONZE ship OF DIESEL ENGINE CRANKCASE FOUNDATIONS AND 9 INSPECTION REQUIREMENTS AND ACCEPTANCE Material OF WELD REPAIRS TO CORRODED STRUCTURES OF MECHANICAL TANKS (HY-80/100 ONLY).

4 EXPANSION or Ultrasonic Particle or Liquid Penetrant Inspection of HY-80 Particle or Liquid Penetrant Inspection of HigherStrength Steel Pressure Hull MATERIAL OF CONTENTS- REPAIR OF CORRODED STRUCTURE AND Repairs to Ordinary Strength and Higher Strength Steelsand Associated , MACHINERY, AND PRESSURE , AND PRESSURE VESSEL INSPECTION 10 SAFETY OF CYLINDERS, OUTLET HEADERS, AND INSIDE THE OUTSIDE THE AND OPERATION OF ARC WELDING AND SERVICE CABLE AND FROM METAL ARC AND GAS TUNGSTEN ARC INVOLVING THE WELDING OR MELTING OF LEAD.. PREVENTION AND CONTROL OF DAMAGE FROM HOT Work by Private Work Work PREVENTION PRECAUTIONS DURING HOT OF CONTENTS- Liquids and Far Hazardous or Protect Combustible Watch Watch EXTINGUISHING EQUIPMENT FOR FIRE Extinguishers Suited for Submarine Hull Extinguisher REQUIREMENTS FOR HOT WORK ON REQUIREMENTS FOR HOTWORK IN WAY OFACOUSTIC INSULATION WITH SEPTUM OF and IN RESTRICTED ACCESS WITH ARC WELDING WITH OXYFUEL OR INERT GAS WELDING, CUTTING,AND BRAZING AND HEALTH EXHAUST HOODS AND GAS SHIELDED ARC OF REFERENCE ,TITLE.

5 ANDNAVYENLISTEDCLASSIFICATION REQUIRED FOR REMOVAL AND REPLACEMENT OFSUBMARINE HULL PLATING AND PATCH DIMENSIONS WITHOUT PARTICLE OR LIQUID PENETRANT INSPECTION EXPANSIONOF SERVICE-PROVEN FULL PENETRATION WELDS IN OR TO HY-80/100 PRESSURE HULL PARTICLE AND LIQUID PENETRANT INSPECTION EXPANSIONOF SERVICE-PROVEN FULL PENETRATION WELDS IN OR TO HIGHERSTRENGTH STEEL PRESSURE HULL PROTECTION LENS SHADE OF ILLUSTRATIONSF igureTitlePageCertification for Copper Ground Wire for Copper Electrode Lead Cable for Single ship at for Two Ships at for Ships Afloat (Sheet 1 of 2).. for Ships Afloat (Sheet 2 of 2).. for ship in Floating Docks or HRD or for Ships in Dry or Graving Corrections on Steel Surface Connections on Metal Overlay To Arrest Cracks in Surface ship Hull Inserts on Patches Crossing Existing Butt of Access Hole Intersecting Existing of Boundary Location for Welded Patch of Patch Removal Where More Than Two Existing Multiple Cuts Plate Chamber Ventilation Partial Circularity Circularity Check Where Tank Top Intersects of Range Wire To Establish of Template Used To Establish Radial of Recording All End Point Elevation and Contour Measurements BeforeCutting and After Rewelding Access or Closure Plates Intersecting Hull Butt Penetration Surfacing of Two-Sided Stuffing OF ILLUSTRATIONS- ContinuedFigureTitlePage074-7-9 Standard Compensating

6 Hull Penetration of Welding of Nonthreaded Stuffing Box or Sleeve and Welding of One Side of Stuffing and Seal Welding of Threaded Stuffing or Cover for Pipe or Valve Connection Through Bulkheads Only, Where LinerIs Already Type Fitting or Shoulder Type Type Fitting and Hull Full Penetration Weld Joint Preparation for Welding on Bulkhead Insulated With Acoustic Insuation andSeptum / (xii Blank)xii@@FIpgtype@@BLANK@@!FIpgtype@@C HAPTER 74 VOLUME 1 WELDING AND ALLIED PROCESSESSECTION SCOPE. This CHAPTER furnishes both the minimum mandatory requirements (indicated by the wordshall) and guidance information (indicated by the words should or may) necessary for welding, brazing, inspec-tion, and safety when used for ship maintenance, repair, and MANDATORY 074-1-1lists mandatory reference documents that form apart of this volume.

7 Fabrication documents are used as basic mandatory references for all welding, fabrication,and inspection requirements and related material, and quality assurance requirements, unless specifically modi-fied by the requirements of this NUCLEAR AND COMBAT WEAPONS SYSTEMS. This volume does not cover welding, brazing,or other work on nuclear or combat weapons systems. Unless otherwise specified, all the requirements containedin this volume apply to all activities performing repair or alterations on Navy ships and small boats. Other infor-mation, appropriate to nuclear systems, is contained in applicable TECHNICAL manuals and shall be obtained fromthe cognizant authority before working on a nuclear system. Welding information for combat weapons and weap-ons systems is contained in individual TECHNICAL manuals for components or systems.

8 Application of these manu-als shall be determined from the cognizant authority before working on weapon ship STRUCTURE AND SYSTEMS. To maintain the integrity of ship structure and systems whenwelding or brazing is performed, it is essential and mandatory to ensure complete compliance with the require-ments specified in this volume, including those of the mandatory reference documents that form a part of RESPONSIBILITY FOR Commanding Officer is responsible for ensuringcompliance with requirements of this volume. Particular attention shall be given to using only trained and quali-fied personnel for welding, brazing, and inspection as defined inSection 2and to personnel and equipment safetyprecautions given in Section 10 of this volume and inNSTM CHAPTER 074, Volume 3, Gas Free REQUIREMENTS.

9 The requirements of some paragraphs in reference documents such as MIL-STD-248,Welding and Brazing Procedure and Performance Qualification and MIL-STD-278, Fabrication,Welding, and Inspection, and Casting Inspection and Repair for Machinery, Piping, and Pressure Vesselsin Ships of the Navyare preceded by the words,When specified in the contract or orderor similar wordsto this effect. These requirements are mandatory and shall be invoked and fully met without exception. Suchrequirements are not meant to be subject to discretion (including that of the NAVAL Sea Systems Command(NAVSEA)) as to applicability. Activities, including all levels of subcontractors, shall be specifically made awareof the mandatory nature of the aforementioned WELD on ships by crew members or activities other than shipyards shall be categorized asdescribed in the following:a.

10 Category A. Category A welds are permanent repairs and alterations to submarine safety boundaries on sub-marine safety (SUBSAFE) certified Category B. Category B welds are emergency temporary repairs to SUBSAFE certified submarines (seeSection 3concerning reporting of emergency temporary repairs).c. Category C. Category C welds are:1 Permanent repairs and alterations on the pressure hull envelope of submarines that are not certified asSUBSAFE2 Permanent repairs and alterations on any submarine pressure hull supporting structure3 Permanent repairs and alterations of the primary structures of surface ships, including ballistic plating andsuperstructure designed for blast loading4. Permanent repairs and alterations of all P-1, P-LT, and P-3a piping systems; A-1, A-2, A-F, A-LT pressurevessels; and T-1 steam turbines5 Permanent repairs and alterations of those portions of machinery or components essential to the mission ofthe Category D.