ASME B31.9 pdf download Building Services Piping 9002 Definitionsadhesive bond: a union of materials by means of anadhesive. anchor: a structural attachment device or mechanism thalprevents the movement of pipe due to thermal expansion, expansion joint thrust, and other loads. arc welding: a group of welding processes that producecoalescence of metals by heating them with an arc, withor without the...