EasyWeld Cut-40 Manuel d'instructions

U.S. NAVYUNDERWATERCUTTING & WELDINGMANUALS0300-BB-MAN-0100910-LP-111-33001 APRIL 1989Change A Dated 15 September 1995PUBLISHED BY DIRECTION OF CO

S0300-BB-MAN-010vi Change A4-2.4 Safety Switches... 4-164-2.5

S0300-BB-MAN-0103-21Figure 3-7. Feeding-In Technique for Underwater Shielded Metal Arc Welding of Fillet Welds in Wide-Gap Joints.

S0300-BB-MAN-0103-22g. The arc should always be broken by pulling back on the previously deposited metal.h. It is always good practice to establish pr

S0300-BB-MAN-0103-23Figure 3-8. Repair Method for Cracks in Underwater Structures Using a Rectangular Patch.

S0300-BB-MAN-0103-24Figure 3-9. Repair Methods for Cracks in Underwater Structures Using a Circular Patch.A. TACK AT 12 O'CLOCK AND 6 O'CLOC

S0300-BB-MAN-0103-25a. Tack the patch on at the 12 o’clock position, tap it down and tack it on at the 6 o’clockposition. Then tack at the 3 and 9 o’c

S0300-BB-MAN-0103-26Figure 3-10. A Typical Underwater Welding Electrode Holder.

S0300-BB-MAN-0104-1CHAPTER 4UNDERWATER ARC CUTTING AND WELDING EQUIPMENT4-1 INTRODUCTIONThis chapter presents information concerning underwater cutti

S0300-BB-MAN-0104-2Figure 4-1. Typical Arrangement of Underwater Arc Cutting Equipment.

S0300-BB-MAN-0104-3Figure 4-2. MK12 SSDS Welding Shield.

S0300-BB-MAN-0104-4Figure 4-3. MK1, MOD 0 Mask and Lens Holder Assembly.

S0300-BB-MAN-010Change A viiD-10 FIRE AND EXPLOSION PREVENTION... D-9D-10.1 Major Causes ...

S0300-BB-MAN-0104-5Figure 4-4. Superlite-17B/NS Helmet and Lens Holder Assembly.

S0300-BB-MAN-0104-6Figure 4-5. MK 12 Helmet Lens Holder Assembly with Parts Identification.

S0300-BB-MAN-0104-7Figure 4-6. Superlite-17B/NS Welding Lens Holder with Parts Identification.

S0300-BB-MAN-0104-8Table 4-1. Recommended Equipment for Underwater Arc Cutting and WeldingCategory ItemDiving equipment MK 12, MK 1 or Superlite 17B S

S0300-BB-MAN-0104-9Specific technical information necessary to operate diving equipment is addressed in the appro-priate surface supported diving syst

S0300-BB-MAN-0104-10Figure 4-7. Typical Welding Generator and Power-Converter Control Panel.

S0300-BB-MAN-0104-114-2.3.2 Welding Generator, Pre-Setup Inspection. Successful underwater welding and cuttingis highly dependent on the efficient ru

S0300-BB-MAN-0104-12Figure 4-8. Equipment Arrangement for Welding and Cutting Straight Polarity.

S0300-BB-MAN-0104-132) If bubbles appear from the plate, switch off the current and change the lead con-nections to the opposite terminals. Repeat tes

S0300-BB-MAN-0104-14Figure 4-9. Tong Test Ammeter.

S0300-BB-MAN-010viii Change AE-4.6 Igniting the Torch Above Water...E-16E-4.6.1 Prepara

S0300-BB-MAN-0104-15machine with no current flowing in the circuit. This is known as the open circuit voltage and ishigher than arc voltage when curre

S0300-BB-MAN-0104-16EXAMPLE: Setting up a Typical Welding Generator.With the Amperage Range set at the 100 to 220 position and the Fine Adjustment set

S0300-BB-MAN-0104-17Each additional length of cable and its connectors produce a voltage drop. To prevent excessivevoltage-drop in the welding or cutt

S0300-BB-MAN-0104-18Figure 4-10. Voltage Drop in Welding Cables.

S0300-BB-MAN-0104-19device which will make the changing electrodes underwater a relatively simple task. Onlytorches which have been designed specifica

S0300-BB-MAN-0104-20welding and most experienced divers prefer the light-weight underwater “stinger” as it is mostoften called. Electrode holders are

S0300-BB-MAN-0104-21Table 4-4 is divided into 4 columns and lists:• Item and description alphabetically• Military Specification Number.• Federal Stock

S0300-BB-MAN-0104-22Table 4-2. Equipment Load-out for Wet Cutting/Welding OperationsQuantity Unit DescriptionWELDING/CUTTING2 Each DC welding power so

S0300-BB-MAN-0104-23WELDING/CUTTING (CONT)2 Each Tubes of silicone lubricant for electrode holders12 Each Dark lenses: #4, #6, #8, and #104 Each Lens

S0300-BB-MAN-0104-24WELDING/CUTTING (CONT)2 Each Framing squares2 Each Pipe wrap-arounds1 Each Ultrasonic thickness and flaw detection device1 Each Dy

S0300-BB-MAN-010Change B ix2-1 Underwater Oxygen-Arc Cutting Electrodes... 2-32-2 Und

S0300-BB-MAN-0104-25MISCELLANEOUSSurface flood lights w/extension cordsUnderwater lights w/cable Spare light bulbs - surface and underwaterApproved gr

S0300-BB-MAN-0104-26Table 4-3. List of Manufacturer’sManufacturerCode No.ManufacturerN/A Andersen Wet WeldP.O. Box 1529New York, NY 10116-152909867 Ar

S0300-BB-MAN-0104-2737775 Platex Ltd.6363 Northam DriveMississauga, OntarioCanadaL4VN/A Proline Paint Company2646 Main StreetSan Diego, California 921

S0300-BB-MAN-0104-28Table 4-4. Parts InformationItemMilitarySpecificationNumberFederal StockGroup/ClassManufacturer’sPart NumberAdhesive, non-water

S0300-BB-MAN-0104-29Electrodes, oxy-arc cuttingUltrathermic (BROCO) 3/8-inch 1/4-inch 36-inch x 3/8-inch- (continued)N/AN/AN/A3818-UW1418

S0300-BB-MAN-0104-30 Change BKerie Cable Control Panel N/A LU-02710-ft H.P. manifold N/A LU-033Kerie Cable (SEELER) 6 mm 50-ft roll

S0300-BB-MAN-0104-31Underwater cutting torches Arcair BROCO Crafsweld34333433343314-050-126BR-2214-050-120Weighted wire-brush 7920Welding cables s

S0300-BB-MAN-0104-32

S0300-BB-MAN-010A-1APPENDIX ADOCUMENTATION MATRIXA-1 PURPOSE.The purpose of this matrix is to provide the user of this manual with a listing of additi

S0300-BB-MAN-010A-2Safety ManualVolume 1Volume 2Volume 3Volume 4Volume 5Volume 6Salvor’s HandbookUnderwater Cut & WeldVolume 1Volume 2Towing Manua

S0300-BB-MAN-010x3-7 Feeding-In Technique for Underwater Shielded Metal Arc Welding of Fillet Welds in Wide-Gap Joints...

S0300-BB-MAN-010B-1APPENDIX BMETRIC CONVERSION FACTORSMETRIC TO ENGLISHkilograms x 2.2046 = pounds (lb)kilograms ÷ 907.2 = tons (2000 lb)millimeters x

S0300-BB-MAN-010B-2WEIGHTS1 pound (lb) = 453.6 grams,or 0.4536 kilograms (kg)1 pound per foot (lb/ft) = 1.4882 kilograms per meter (kg/m)1 net ton (2

S0300-BB-MAN-010B-3 (B-4 blank)PRESSURE OR STRESS (FORCE/AREA)pascal (Pa) = newton/meter2(N/m2)pound-force/sq inch (psi) x 6894.757 = Pam Pa = MN/m2T

S0300-BB-MAN-010B-4

S0300-BB-MAN-010C-1 (C-2 blank)APPENDIX C BIBLIOGRAPHYANSI/AWS D3.6, “Specification for Underwater Welding,” American Welding Society, 1980.AWS “Wel

S0300-BB-MAN-010C-2

S0300-BB-MAN-010Change A D-1APPENDIX DSAFETY IN UNDERWATER CUTTING AND WELDINGD-1 PURPOSEThis appendix is intended to cover safety precautions to be

S0300-BB-MAN-010D-2 Change AD-3.1 General Information. Gases produced by underwater cutting are rich in oxygen andhydrogen and will explode if trappe

S0300-BB-MAN-010Change A D-3trap explosive gases. These areas and voids must be vented or made inert in accordance withNaval Ships Technical Manual NA

S0300-BB-MAN-010D-4 Change AD-4 ELECTRICITY UNDERWATERElectricity and water are incompatible by nature and the use of electrically powered equipmentu

S0300-BB-MAN-010xi (xii blank)2-1 Cutting Amperage Requirements for Steel-Tubular Electrodes ... 2-62-2 Oxygen Regu

S0300-BB-MAN-010Change A D-5The following precautions must be observed:a. Careful examination should be made before starting the cut to learn how the

S0300-BB-MAN-010D-6 Change Ad. Stand on dry wood, rubber matting or similar insulating material and not on groundedmetal.e. Wear dry rubber or rubberi

S0300-BB-MAN-010Change A D-7j. Never allow any metallic part of the diving dress to touch the work. D-8 POWER CABLES AND CONNECTORSThe following are

S0300-BB-MAN-010D-8 Change Ah. Secure the ground clamp as close to the work-site as possible, preferably in the for-ward line of vision. The diver mus

S0300-BB-MAN-010Change A D-9Both double-pole and single-pole safety switches are authorized, however a double-pole is themost often used because both

S0300-BB-MAN-010D-10 Change AD-10.1 Major Causes. The major causes of fire and explosion are listed as follows:• combustibles reached by the arc,• f

S0300-BB-MAN-010Change A D-11g. Never tamper with safety plugs (safety relief valves).h. Never connect a regulator to a cylinder containing a gas othe

S0300-BB-MAN-010D-12 Change Ab. Avoid storing cylinders in heavy traffic areas, such as near access or gangways of ves-sels.c. Do not store cylinders

S0300-BB-MAN-010Change A D-13a. During set-up procedures, point the MAPP gas valve outlet away from the oxygen cyl-inder before cracking to clear the

S0300-BB-MAN-010D-14 Change Ado this can result in the accumulation of an explosive mixture. This is a serious explo-sive hazard.d. Metal tools (even

S0300-BB-MAN-010xii

S0300-BB-MAN-010E-1APPENDIX EEXCEPTIONAL SITUATIONSE-1 PURPOSEThis appendix is intended to cover cutting and welding procedures and equipment which m

S0300-BB-MAN-010E-2E-2.2 Principles of Operation. The process consists of striking an arc underwater between a car-bon-graphite, copper-coated and wa

S0300-BB-MAN-010E-3Figure E-1. Arcwater Torch Assembly.

S0300-BB-MAN-010E-4NOTEThick, gauntlet-type rubber gloves in good condition, wornover a pair of Playtex-type gloves afford the best protectionagainst

S0300-BB-MAN-010E-5should be held at a 40° angle to the work with the water jet under the electrode. The torch shouldbe moved forward at a speed suffi

S0300-BB-MAN-010E-61. Stainless steel operating data is similar to carbon steel. Non-ferrous materials such as bronze and brasswith copper content a

S0300-BB-MAN-010E-7Frequently, during a salvage operation, conditions prevent safely placing a diver in position forcutting. Such a situation might be

S0300-BB-MAN-010E-8E-3.2 Required Equipment. The following is a list of required equipment: a. Thermic lance.b. Thermic lance holder/ball valve assem

S0300-BB-MAN-010E-9Figure E-2. Thermic Lance Holder Assembly.Figure E-3. Standard Thermic Lance Equipment Set Up.

S0300-BB-MAN-010E-10E-3.4 Material Consumption.1 One Thermic lance will penetrate 24-inches of reinforced con-crete producing a hole 2-1/2 inches in

S0300-BB-MAN-010xiii (xiv blank)STANDARD NAVY SYNTAX SUMMARYThis manual utilizes standard Navy syntax as pertains to permissive, advisory, and mandato

S0300-BB-MAN-010E-11E-4.2 Equipment and Material. The equipment generally required for underwater MAPP gascutting is listed in Table E-2. Only approv

S0300-BB-MAN-010E-12E-4.3 Protective Clothing. MAPP gas cutting may be conducted underwater without specialprotective clothing or devices. E-4.4 Cyl

S0300-BB-MAN-010E-131. Based on manufacturer’s data.2. MAPP gas will turn to a liquid form at depths greater than 100 FSW, if not heated.Table E-3.

S0300-BB-MAN-010E-14E-4.5 Underwater MAPP Gas Cutting Torches. A standard oxy-acetylene oxygen cuttingtorch can be used for cutting with MAPP gas und

S0300-BB-MAN-010E-15Figure E-4. Standard Surface Cutting Torch with Underwater Spacer Sleeve.

S0300-BB-MAN-010E-16Torch Igniter. A hand mechanical igniter should be used for lighting the torch. This simple tool issafer than an electrical ignite

S0300-BB-MAN-010E-17Table E-5. Recommended Pressure Settings and Hose Size Selection ChartWATER MAPP GAS Depth Pressure(FSW) (psi)Pressure(psi)HoseD

S0300-BB-MAN-010E-18E-4.7 Lowering the Ignited Torch. The ignited torch may be lowered to the working location inone of two ways:a. Carrying the Torc

S0300-BB-MAN-010E-19Figure E-5. Starting the Cut at the Edge of a Plate.

S0300-BB-MAN-010E-20Figure E-6. Starting a Cut in the Central Portion of a Plate.

S0300-BB-MAN-010Change A xvSAFETY SUMMARYThis Safety Summary contains all specific WARNINGS and CAUTIONS appearingelsewhere in thi

S0300-BB-MAN-010E-21E-4.8.3 Advancing the cut. The cut is advanced by moving the torch at a steady, uniform rate ofspeed along the line of cut, fast

S0300-BB-MAN-010E-22E-5 UNDERWATER WELDINGWhen commercially produced waterproofed wet welding electrodes are not available, surfacewelding electrodes

S0300-BB-MAN-010E-23Table E-6. Surface Welding Electrodes Suitable for Wet Welding1/8”, 5/32” & 3/16” E6013,E7014, E7016 & E70181/8”, 5/32” &a

S0300-BB-MAN-010E-24E-5.2 Preparation for Underwater Shielded Metal Arc Welding. Standard electrode holdersdesigned for surface use may be used when

S0300-BB-MAN-010E-251. Arc voltage is the voltage recorded as welding is in progress. Tong meter amperage should alsobe recorded as welding is in pro

S0300-BB-MAN-010E-26l. Waterproofing compounds drying times vary from minutes to several days.m. Never, under any circumstances, put a waterproofed el

S0300-BB-MAN-010E-27e. There are considerable metallurgical advantages with the use of this method. Defectsnormally associated with weld metal, such a

S0300-BB-MAN-010E-28Figure E-8. Friction Stud Welder.

S0300-BB-MAN-010Glossary-1GLOSSARYNOTEThe following Glossary of Terms is intended to aid thereader in understanding the materials, tools and processes

S0300-BB-MAN-010Glossary-2Cutting Tip. That part of an oxygen cutting torch from which the gases issue.Cutting Torch. A device used in oxygen cuttin

S0300-BB-MAN-010xvi Change AThe following warning and caution statements appear in this manual and are repeated here foremphasis:CAUTIONA statement us

S0300-BB-MAN-010Glossary-3Kerf. The width of the cut produced during a cutting process.Kerie Cable. A flexible spiral cable with a hollow core enclo

S0300-BB-MAN-010Glossary-4Puddle. See preferred term Molten Weld Pool.Self-Consuming Technique. A method of arc welding in which the electrode is dra

S0300-BB-MAN-010Change B Index-1INDEXAC power ...

S0300-BB-MAN-010Change A Index-2Cutting and welding“C”-type ground clamps ...

S0300-BB-MAN-010Change A Index-3ElectrodesAndersen Easy Weld ...

S0300-BB-MAN-010Change A Index-4Growth-encrusted metal(see Note) ...

S0300-BB-MAN-010Change A Index-5Operating principlesShielded Metal-Arc (SMA) ...

S0300-BB-MAN-010Change A Index-6Resistance ...

S0300-BB-MAN-010Change A Index-7Underwater Cutting ...1-1, 1-2, 2-1, 2-3, 2-6, 2-14, 2-21, 2-25, 2-27, 2-41, 2-43methods

Ref: NAVSEAINST 4160.1ANAVSEA S0005-AA-GYD-030/TMMP(Insert Classification of TMDER Here) CLASSIFICATION:INSTRUCTION: Continue on 8 1/2" x 11"

A Change BPage No.* Change No.Title and A . . . . . . . . . . . . . . . . . . . . . . . . . . BCertification Sheet . . . . . . . . . . . . . . . .

S0300-BB-MAN-010Change A xviiWARNINGAC power shall not be used for underwater cutting andwelding due to the extreme danger involved wi

FOLD HEREFOLD HERECOMMANDERPORT HUENEME DIVISION CODE 5B00NAVAL SURFACE WARFARE CENTER4363 MISSLE WAYPORT HUENEME, CA 93043-4307DEPARTMENT OF THE NAVY

S0300-BB-MAN-010xviii Change AWARNINGNever get between the electrode holder and the strikerplate (ground) when the switch is on. (page 2-31)WA

S0300-BB-MAN-010Change A xixWARNINGOxygen partial pressure increases with water depth,thereby creating a fire hazard in habitat environments.N

S0300-BB-MAN-010xx Change AWARNINGThis process produces large quantities of hydrogen gas.When combined with oxygen, these concentrations arehighly

S0300-BB-MAN-010Change A xxiCAUTIONThe hand should never be closer than 4 inches from theelectrode tip. Therefore, as the electrode

S0300-BB-MAN-010xxii Change ACAUTIONWhen the electrode burns down to within 3 inches of the torch,call for SWITCH OFF. Release the trigger to ex

S0300-BB-MAN-010Change A xxiiiCAUTIONArcing can damage welding machine switch contacts. DONOT change the Range Switch position while welding

S0300-BB-MAN-010xxiv Change ACAUTIONKeep all Thermic lance materials away from oil and/or grease.(page E-7)

S0300-BB-MAN-0101-1CHAPTER 1INTRODUCTION1-1 SCOPEThis manual is intended to provide information on the use of conventional techniques for cuttingand

S0300-BB-MAN-0101-2 Change Bthe steel-tubular electrode. Of these, the exothermic is preferred because it will burn indepen-dently after an arc is str

DEPARTMENT OF THE NAVYNAVAL SEA SYSTEMS COMMANDWASHINGTON, D.C. 20362NAVSEA S0300-BB-MAN-010 0910-LP-111-3301U.S. NAVY UNDERWATER CUTTING & WELDI

S0300-BB-MAN-0101-3 (1-4 blank)precautions, warnings and cautions. This information, which is based on knowledge and expe-rience gained through many y

S0300-BB-MAN-0101-4

S0300-BB-MAN-0102-1CHAPTER 2UNDERWATER CUTTING 2-1 INTRODUCTIONOne of the major tasks of the Salvor is the refloating of stranded vessels and the c

S0300-BB-MAN-0102-22-2 OXYGEN-ARC CUTTING There are two types of electrodes used for oxygen-arc (oxy-arc) cutting—steel-tubular (manufac-tured by Arc

S0300-BB-MAN-0102-3Figure 2-1. Underwater Oxygen-Arc Cutting Electrodes

S0300-BB-MAN-0102-4Figure 2-2. Underwater Oxygen-Arc Electrode Designs.

S0300-BB-MAN-0102-5c. It serves as an electrical insulator, even in wet conditions, thereby assisting in safe-guarding the diver in the event of accid

S0300-BB-MAN-0102-6The steel-tubular electrode requires 300-400 amps at the torch working depth. With proper powerand oxygen pressure settings, satisf

S0300-BB-MAN-0102-7Table 2-2. Oxygen Regulator Settings for Oxygen-Arc Cutting Electrodes (Hose Lenths - 50 Feet to 400 Feet) Hose length50 FootDepth(

S0300-BB-MAN-0102-8Table 2-2. Oxygen Regulator Settings for Oxygen-Arc Cutting Electrodes (Hose Lenths - 50 Feet to 400 Feet) - ContinuedHose length2

S0300-BB-MAN-0102-9Table 2-2. Oxygen Regulator Settings for Oxygen-Arc Cutting Electrodes (Hose Lenths - 50 Feet to 400 Feet) - ContinuedHose length35

S0300-BB-MAN-0102-101. Each 50-pound box contains approximately 167 electrodes.2. There are approximately 220 cubic feet of gas in a standard oxygen

S0300-BB-MAN-0102-112-2.7 Oxygen Purity. The oxygen purity for all underwater oxygen cutting should be 99.5 percentor greater. As the oxygen purity is

S0300-BB-MAN-0102-12Figure 2-3. Drag Techniques for Cutting Steel with Steel-Tubular Electrodes

S0300-BB-MAN-0102-13a. Insert the electrode into the collet opening until it bottoms out against the washer.Tighten the collet nut. To start the cut,

S0300-BB-MAN-0102-14NOTEBefore beginning the cut, the diver should visually checkthe oxygen flow while holding the electrode in a horizontalposition.

S0300-BB-MAN-0102-152-2.10 Steel-Tubular Electrode Cutting Technique (Thin plate). When cutting steel platewhich is 1/4-inch thick or less, use the f

S0300-BB-MAN-0102-16Figure 2-4. Technique for Cutting Steel Less Than 1/4 Inch with Steel-Tubular Electrodes.

S0300-BB-MAN-0102-17Figure 2-5. Technique for Piercing Holes in Steel Plate using the Oxy-Arc Process with Steel Tubular Electrodes.

S0300-BB-MAN-0102-182-2.12 Steel-Tubular Electrode Cutting Technique (cast iron and non-ferrous metals). Castiron and non-ferrous metals do not oxidi

RECORDOFCHANGESS0300-BB-MAN-010CHANGENO.A 15 Sep 1998 KLBChangesaffectfrontmatter,Chapter2andAppendixDDATEOFCHANGEENTEREDBYTITLEAND/ORBRIEFDESCRIPTION

S0300-BB-MAN-0102-19Figure 2-6a. Underwater Oxygen-Arc Cutting Torch Breakdown (Arcair).COLLET RINGASSEMBLYCOLLETCHUCKBLOWBACKRETAINERSEA TORCHHANDLEF

S0300-BB-MAN-0102-20Figure 2-6b. Underwater Oxygen-Arc Cutting Torch Breakdown (BROCO).SCREWSNEOPRENEWASHERCOLLET HEADNEOPRONEWASHERHEAD NUTVALVEHANDL

S0300-BB-MAN-0102-21Figure 2-6c. Underwater Oxygen-ARC Cutting Torch Breakdown (Craftsweld).TORCH HEADINSULATORJACKETTORCH HEADFLASHARRESTORCARTRIDGET

S0300-BB-MAN-0102-222-3 EXOTHERMIC ELECTRODESThe BROCO Ultrathermic electrode consists of seven small rods inside a thin steel tube (see Fig-ure 2-2c

S0300-BB-MAN-0102-23electrodes will continue to burn when the current is off, it is recommended that electrical currentbe used to provide more heat an

S0300-BB-MAN-0102-241. For greater cable lengths, add 2 amperes for each additional 50-foot length of power cable. (Based onmanufacturer’s data)Table

S0300-BB-MAN-0102-252-3.2 Oxygen Requirements. Exothermic cutting consumes a large volume of oxygen; there-fore, a 3/8-inch inside diameter oxygen ho

S0300-BB-MAN-0102-261. Range of cut figures represent cuts made with and without power. The lower numbers were attainedwithout power and the higher n

S0300-BB-MAN-0102-272-3.4.1 Disadvantages of Exothermic Electrodes. The following are disadvantages of exother-mic electrodes.a. Larger volume of oxy

S0300-BB-MAN-0102-28NOTEThick, gauntlet-type rubber gloves in good condition, wornover a pair of playtex-type gloves afford the best protectionagainst

S0300-BB-MAN-010i (ii blank)FOREWORDShip Salvage, Harbor Clearance and Wreck Removal oftentimes require extensive underwatercutting and welding. The l

S0300-BB-MAN-0102-29Figure 2-7. Technique for Cutting Steel Using Exothermic Electrode.

S0300-BB-MAN-0102-30b. To advance the cut, apply slight pressure to maintain electrode/work contact. Hold theelectrode with the free hand as if holdin

S0300-BB-MAN-0102-31b. To cut thick, non-ferrous metals, create a puddle and keep the electrode tip slightlybelow the surface of the molten metal. Eve

S0300-BB-MAN-0102-32b. Electrode burns down in approximately 60 seconds of continuous use and cuts lessthan 12 inches of 1/2-inch plate.2-3.7.2 Proba

S0300-BB-MAN-010Change B 2-33NOTEWashers for 5/16-inch electrodes and smaller will signifi-cantly obstruct the oxygen flow.e. Remove flashback arresto

S0300-BB-MAN-0102-34 Change B2-4.1 Advantages and Disadvantages of the Kerie Cable. The advantages of the Kerie Cableare as follows:a. There is less

S0300-BB-MAN-010Change B 2-35tip of the Kerie Cable. The cable should ignite immediately. Lift the knife switch (switch off)when ignition takes place

S0300-BB-MAN-0102-36 Change BFigure 2-8. Seeler Kerie Cable Control Panel.

S0300-BB-MAN-0102-37The Kerie Cable is manufactured in three sizes: 50-foot lengths of 9mm (0.36-inch) and 100-footlengths of 12mm (0.48-inch) for cut

S0300-BB-MAN-0102-38Figure 2-9. Typical Kerie Cable Set Up.12 VOLT 12 VOLT+ - + -- NEG AMPIN-NEG AMPOUTLP OOUT2 HP OIN2HP O2LP O2O2 O2 O2HPMANIFOLDINS

S0300-BB-MAN-010Change A iiiFOREWARD...

S0300-BB-MAN-0102-39e. Connect a length of 100-, 200- or 250-foot extension lead to the control panel fittingmarked LP CUTTING OXYGEN OUT. f. Open the

S0300-BB-MAN-0102-40Upon reaching the work site, the diver, when ready, should call and wait for gas pressure to beincreased. A delay of approximately

S0300-BB-MAN-0102-41brushing motion and several passes to eliminate molten metal from the cut.2-4.8 Cutting Thick Metals. When cutting thicker metal

S0300-BB-MAN-0102-421. Based on manufacturer’s data.Table 2-7. Kerie Cable Size/Metal to be Cut1Cable size(mm)Metal Thickness(in.)6 (0.24 in.)9 (0

S0300-BB-MAN-0102-432-4.9 Re-lighting Cable Underwater. After calling for GAS OFF, the diver should continue torub the cable against the work to prev

S0300-BB-MAN-0102-442-5 SHIELDED METAL ARC CUTTINGUnderwater shielded metal-arc cutting is a simple process. It employs a stick-type electrode butcan

S0300-BB-MAN-0102-452-5.4 Underwater Shielded Metal-arc Cutting Techniques. The diver should understand thatthis process merely melts the metal and d

S0300-BB-MAN-0102-462-5.5 Drag Technique. Steel plate can be cut simply by dragging the electrode along the desiredline of cut. The drag technique ca

S0300-BB-MAN-0102-47 (2-48 blank)Figure 2-10. Technique for Underwater Shielded Metal-Arc Cutting of Thick Plate and Round Stock.

S0300-BB-MAN-0102-48

S0300-BB-MAN-010iv Change B2-3.6 Exothermic Cutting Technique ... 2-28 2-3.6.1 Ex

S0300-BB-MAN-0103-1CHAPTER 3UNDERWATER WELDING3-1 INTRODUCTIONAlthough underwater welding does not have as many applications in marine salvageoperati

S0300-BB-MAN-0103-2spent on the job can be reduced considerably. Historically, the Navy has performed mostunderwater welding for the purpose of making

S0300-BB-MAN-0103-3techniques may be produced. In salvage, most underwater welding consists of joining fairly sim-ple steel patches to hull plating. T

S0300-BB-MAN-0103-4a. Cut a small sample of the material to be welded and make a Tee fillet weld specimensimilar to the one illustrated in Figure 3-1.

S0300-BB-MAN-0103-5Figure 3-1. Test Specimen for Tee Fillet Weld.4"8"4"STOP AND RESTARTWELD NEAR CENTERFILLET WELD

S0300-BB-MAN-0103-6NOTEVery high strength steels, like HY-80, are not recommendedfor wet welding because of cracking problems stemmingfrom the intense

S0300-BB-MAN-0103-7 1. These electrodes have passed Navy qualification testing; larger sizes are available, but have not yet beentested by the Navy.1

S0300-BB-MAN-0103-8a. Manufacturer’s recommendations, particularly for stainless steel electrodes.b. Improved running characteristics of the electrode

S0300-BB-MAN-0103-9Figure 3-2. The Underwater Welding Arc.

S0300-BB-MAN-0103-10c. Adverse currents, d. Low temperature, e. Where the metal thickness is less than 0.20 inch. f. Where the fit-up is poor. A 1/8-i

S0300-BB-MAN-010Change A v3-6 MATERIALS USED IN UNDERWATER SHIELDED METAL-ARC WELDING...

S0300-BB-MAN-0103-11Figure 3-3. Parts of a Weld.

S0300-BB-MAN-0103-123-9.2 Fillet Weld. A fillet weld is a triangular weld used to join two surfaces that are at approxi-mately right angles to each o

S0300-BB-MAN-0103-133-11 JOINT FIT-UPSince most underwater tasks are more cumbersome than similar topside work, the proper posi-tioning of large memb

S0300-BB-MAN-0103-14needed. The open circuit voltage may also require adjustment.f. After the optimum settings are determined, welding can begin.g. Th

S0300-BB-MAN-0103-15d. Hold the electrode against the plate at a work angle of 45° to the plate end surfaces asillustrated in Figure 3-4. Tilt the ele

S0300-BB-MAN-0103-16Figure 3-4. Self-Consuming Technique for Underwater Shielded Metal Arc Welding of Horizontal Fillet Welds.LEAD ANGLEELECTRODEA45°E

S0300-BB-MAN-0103-17f. When the electrode is consumed, break the arc, call for SWITCH OFF. Keep the elec-trode in welding position until the tender (p

S0300-BB-MAN-0103-18Figure 3-5. Self-Consuming Technique for Underwater Shielded Metal Arc Welding of Vertical Fillet Welds.

S0300-BB-MAN-0103-19Figure 3-6. Self-Consuming Technique for Underwater Shielded Metal Arc Welding of Overhead Fillet Welds.

S0300-BB-MAN-0103-203-12.3.3 Self-Consuming and Manipulative Techniques. The self-consuming technique is rec-ommended for divers of average or less t