An oil-well site required a temporary sand trap to allow gases and condensates to empty from down-hose portions of the well. In an effort to implement a speedy fix, a nearby sand trap was placed in service at the well. The sand trap had multiple functions in the operation of a new well. It was not uncommon for a sand trap to vibrate, move and shake at high well pressures with flow pulsations during well clean-out startup. There was inadequate structural supports and as a result the threaded pipe at the sand trap inlet and outlet failed while in service. A worker was severely injured. The worker did not have drawings, specifications or work instruction about the installation.