A statement used to call particular attention to an action or procedural step which if not strictly followed could result in the injury or death of personnel

CAUTION

A statement used to provoke notice, awareness, and attention from personnel regarding an action or procedural step which, if not followed, could result in possible injury or equipment malfunction.

The following warning and caution statements appear in this manual and are repeated here for emphasis:

WARNING

AC power shall not be used for underwater cutting and welding due to the extreme danger involved with AC current underwater. Electrical shock produced by AC current prevents voluntary relaxation of the muscles controlling the hand. Consequently, the diver may be unable to let go if his body or equipment accidentally enters the electrical circuit. (pages 2-2, 3-1, 4-9, D-3)

WARNING

When the electrode has been consumed to within 3 inches of the torch, stop the cut and signal for SWITCH OFF before attempting to change electrodes. Maintain the torch in the cutting position until the tender (phone talker) acknowledges SWITCH OFF. Then tap the electrode twice to make sure the current is off. This safety precaution is mandatory, regardless of the type of electrode being used. (page 2-14)

WARNING

Hydrocarbons ignite almost spontaneously in the presence of oxygen. Never allow oxygen-carrying components to come in contact with oil or grease. (pages 2-18, D-10)

WARNING

It is unsafe to operate the torch without the flash arrestor in place. To do so may cause injury and/or destroy the torch. (pages 2-22,4-17)

WARNING

Never get between the electrode holder and the striker plate (ground) when the switch is on. (page 2-31)

WARNING

Do NOT attempt to speed up the cutting by creating a fire or inferno deep inside the metal. Such a situation can lead to an explosion. (pages 2-33, D-1)

WARNING

The Kerie Cable WILL NOT cut rock or concrete either above or below water. To attempt to do so may create an explosion causing serious injury or death. (page 2-33)

WARNING

The equipment should not be used to cut non-ferrous metals underwater since they do not oxidize and have to be melted. Experience has shown that this can result in a violent explosion which could be fatal. (page 2-34)

WARNING

It is very important that ignition NOT occur with oxygen pressure too low. To do so will cause the cable to burn inside itself, and as full pressure is applied, the flame will burn out sideways along the length of the cable in a series of blow holes that can cause diver injury. (page 2-37)

WARNING

Oxygen partial pressure increases with water depth, thereby creating a fire hazard in habitat environments. No habitat welding will be performed in an air environment at depths greater than 60 FSW. Habitats shall be filled with an inert gas at depths greater than 60 FSW. (page 3-2)

WARNING

A diver is at risk to severe electrical shock when performing a cutting or welding operation while only partially immersed in water. Hence, the splash zone is the most hazardous location in which a diver can be placed. (page D-2)

WARNING

NEVER bring a cutting torch into a bell with the oxygen on or with the welding generator running. (page D-2)

WARNING

When the arcwater electrode has been consumed to within 1.5 inches of the torch, stop the cut and signal for SWITCH and water OFF before changing the electrode. Maintain the torch in the cutting position until the tender signals SWITCH OFF. Then tap the electrode twice to make sure the current is off. This safety precaution is mandatory, regardless of the type of electrode used. (page E-5)

WARNING

This process produces large quantities of hydrogen gas. When combined with oxygen, these concentrations are highly explosive and will produce random explosions of some magnitude. Several divers engaged in salvage work have been killed using this process. (page E-5)

WARNING

Thermic Lances or Burn Bars are NOT to be used by divers while underwater or by topside personnel performing a cut below the waterline while a diver is in the water. However, during situations where it would be impossible to place a diver in position for cutting and where the cutting can be accomplished from the surface, the Thermic Lance may be used with EXTREME CAUTION! (page E-6)

WARNING

Always wear protective clothing when using the Thermic lance: full protective suit, leather gloves, tinted face shield, and a hard hat. (page E-7)

WARNING

Acetylene is very unstable at pressures above 15 psi, and is NOT used for underwater cutting. (page E-10)

CAUTION

The hand should never be closer than 4 inches from the electrode tip. Therefore, as the electrode is consumed and becomes manageable, the pool que grip can be released. (page 2-14)

CAUTION

Pushing the electrode into the hole too fast will result in a shower of spatter, which may damage the diving equipment and/or result in a blow-back. (page 2-15)

CAUTION

It is important that the proper washer-collet combination is used. An oversize washer will allow the electrode to bottom on the flashback arrestor, creating electrolysis and possible arcing. An undersize washer will restrict the flow of oxygen to the larger bore electrodes, causing inefficient cutting. (page 2-22)

CAUTION

Unlike steel-tubular rods that stop burning the instant the electrical circuit is broken, the exothermic electrodes will continue to burn as long as oxygen is flowing through the electrode. (page 2-25)

CAUTION

When the electrode burns down to within 3 inches of the torch, call for SWITCH OFF. Release the trigger to extinguish the electrode, since it will continue to burn when the electrical power is off with oxygen still flowing. Do NOT attempt to use the last 3 inches of the electrode. To do so will subject the torch to unnecessary heat and possible damage. (page 2-27)

CAUTION

Burning the electrode shorter than the 3-inch minimum can damage the torch interior. (page 2-30)

CAUTION

Ensure that the red insulating sleeve is correctly reinstalled after replacing the Kerie Cable. (page 2-36)

CAUTION

Do not force or poke the cable into the material being cut, since this will cause blow-back. (page 2-40)

CAUTION

Due to the flammability and toxicity of fumes from waterproofing compounds, waterproofing must be conducted in a well-ventilated space, clear of any open flames or spark-producing machinery. (page 2-44, E-21)

CAUTION

Arcing can damage welding machine switch contacts. DO NOT change the Range Switch position while welding or under load. Arcing causes pitting and will eventually render the contacts inoperative. (page 4-15)

CAUTION

When AC power is required for underwater lighting or operation of hand tools, the AC equipment must be protected by ground-fault detection (GFD) and/or ground-fault interruption (GFI) devices. (page D-8)

CAUTION

It is extremely important to mount the switch correctly. The switch must be positively acting, rigidly mounted, and located so that it cannot be accidentally knocked or vibrated closed. Should the switch fall, the circuit would be broken. (page D-8)

CAUTION

Sparkless tools are made of an alloy containing beryllium, which is extremely poisonous. DO NOT buff, steel wire brush, or grind tools containing beryllium as this action will release particles, dust or vapors which may be ingested. Obtain medical attention as soon as possible should cuts or ingestion occur. Consider all reddish, copper-colored tools as containing beryllium until, or unless, it is known otherwise. Such tools are not usually marked when they contain beryllium. Although, they may be marked with a Low-Mu mark. (page D-14)

CAUTION

Keep all Thermic lance materials away from oil and/or grease. (page E-7)

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