A girth weldA girth weld is a type of weld used in pipelines to join two sections of pipe together circumferentially. It is commonly used in the construction of long-distan… is a type of weldLocalized coalescence of metals produced by heating the materials to the welding temperature, with or without the application of pressure, or by the application… used in pipelines to join two sections of pipe together circumferentially. It is commonly used in the construction of long-distance pipelines for the transportation of fluids, such as oil, gas, or waterAn inorganic compound of hydrogen and oxygen. Used in non-destructive testing as a penetrant and as a medium for testing..