One piece stabber pipe is often made use of when the loading arm link would be to be horizontally oriented relative to your railcar, whereas a two piece stabber pipe is vertically oriented. Note that one piece stabbers have one particular 50 %, and two piece stabbers have two halves. https://lpg-station-piping-system16161.articlesblogger.com/57534363/about-lpg-station-piping-system