What is meant by back gouging in welding?

marine. The removal of weld metal and base metal from the weld root side of a welded joint to facilitate complete fusion and complete joint penetration upon subsequent welding from that side. See also Gouging.

What is gouging?

What Does Gouging Mean? Gouging is a type of corrosion that occurs on a metallic surface in which a hole, groove or indentation is created. Gouging happens in boiler tubes because of caustic corrosion that occurs as a result of excessive use of alkalines such as sodium hydroxide (NaOH).

What is Arc Gouging used for?

The main goal of air arc gouging is to remove defective or old welds to repair or dismantle equipment. Unlike oxy-fuel cutting, air arc gouging avoids the need for oxidation of the metal to cut. The rate of metal removal depends on the efficiency of air jet in removing molten metal and the melting rate.

What is gouging in pipe?

A gouge is created when metal is removed from the pipe wall through mechanical means. The sharp edges of the gouge act as stress concentrators and pose a threat to the integrity of the pipe. When mechanical damage to the pipe occurs, the pipe coating is usually damaged as a result.

What is gouging rod?

Gouging electrodes are made of carbon and have a copper coating. Gouging carbon rods are used for metal removal at fast rates with low power consumption. It is generally used to remove welding defects, excess welds and foundry risers from cast products.

What is gouging machine?

Air carbon arc gouging is a process of removing metal by means of heat generated from a carbon arc. The process uses a carbon/graphite electrode, compressed air and a standard power source. The intense electric arc used between the tip of a carbon electrode and a metal work piece cuts and melts the work piece.

What is a injurious dent?

(d) Plain dents are defined injurious if they exceed a depth of 6\% of the nominal pipe diameter. Plain dents of any depth are acceptable provided strain levels associated with the deformation do not exceed 6\% strain.

How many amps is a gouge?

Gouging Electrodes

ELECTRODE CURRENT REQUIREMENTS
ELECTRODE	5/32	3/16
MIN. AMPS DC	90	200
MAX. AMPS DC	150	250

What is gouging torch?

Gouging is carried out using a torch through which oxygen and a fuel gas (acetylene, propane or mains gas) are passed. Rapid oxidation of the steel takes place and material is removed by the pressure of the gases.

What is a plain dent?

plain dent. a smooth dent that contains no wall. thickness reductions (such as a gouge or. a crack) or other defects or.

What does mechanical damage mean?

Mechanical damage is the loss of material due to a mechanical action. Mechanical damage of pipeline can be defined as localized damage resulting from contact between the pipe and an object. Mechanical damage leads to material failure, and failure leads to fracture of materials.

What does gouging mean in welding?

Oxyfuel Gouging. Oxyfuel gouging is a common thermal or chemical method and a variation of oxyfuel welding and cutting. Steel is heated to its ignition temperature with fuel gas and then rapidly combusted and removed from the surface by a jet of oxygen gas.

How to use gouging rods?

Insert the rods into the handles. Drill for a locking screw on each handle. This screw fixes the rods so they cannot shift or rotate from your setting of their angle. Now place the spring into the countersink holes on the inner surfaces of the handles.

What is back GOUGE welding?

back gouging. [′bak ‚gau̇j·iŋ] (metallurgy) The elimination of excess material from both weld metal and base metal on the opposite side of a partly welded joint; a groove or bevel is formed in order to facilitate complete joint penetration.