S0300BBMAN010 Table E6 Surface Welding Electrodes Suitable for Wet Welding

1/8", 5/32" & 3/16" E6013, E7014, E7016 & E7018

1/8", 5/32" & 3/16" E309, E310 & E312

1/8" & 5/32" ENiCrFe-2, ENiCrFe-3 & ENiCrMo-3

Carbon steel

Stainless steel

High nickel

American Welding Society, AWS A5.1

American Welding Society, AWS A5.4

American Welding Society, AWS A5.1

WATERPROOFING MATERIALS

Epoxy 152 MIL-P-24441

Lea-Lac 30-L2093

Non-petroleum-based, clear, polyurethane

E-5.2 Preparation for Underwater Shielded Metal Arc Welding. Standard electrode holders designed for surface use may be used when underwater holders are not available, but only in an extreme emergency situation. It must be realized that these holders were never intended to be used underwater and therefore are not adequately insulated. The importance of fully insulating all current-carrying parts cannot be overemphasized. See Table E-7 for amperage settings to depths of 50 FSW.

When preparing for underwater welding operations, several factors must be considered before welding actually begins. Adequate electrode preparations must be made. Lack of attention to detail here may well result in wasted diving time. For best results, follow the guidelines below:

a. Avoid handling the flux coating with fingers.

b. Before the dipping process, E7014 and E7016 electrodes shall be removed from their containers and placed into an oven. The electrode shall be heated to 300°F and held at temperature for 4 hours. The oven temperature shall then be reduced to 150°F. The electrodes must remain in the oven until dipping operation takes place.

c. It is important that the work be accomplished in an area of low humidity.

d. Mix the waterproofing according to the manufacturer's instructions in a clean container.

e. Attach handling clips to the bare metal end of the electrode before dipping. Suitable clips can be fashioned using alligator clips with holes drilled into one end and "S" hooks made from small wire.

f. Dip warm electrodes vertically into the waterproofing solution. Wait until no more gas bubbles generated by the electrode appear in the dipping container. Only then remove the electrodes from the container. This ensures a sound, uniform waterproof coating on the flux covering.

g. Dip electrodes once or twice as desired, covering all of the flux coating each time. If dipping more than one electrode at a time, do not allow their surfaces to touch each other.

h. Hang electrodes vertically in a warm, dry area. This allows excess waterproofing, not absorbed into the flux coating, to run off evenly and form a slight bubble on the electrode tip. Leave the bubble attached. This will be removed when the diver strikes the arc.

i. Allow electrodes to fully dry before re-dipping.

j. Follow the same procedure for E308 and E310 electrodes.

k. Do not heat E6013 electrodes prior to dipping. To do so would dry out the water-based flux adhesive rendering the flux useless.

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