DefinePK

Abstract

Provision of drinking water in small islands that do not have the potential for fresh water needs to be done with several alternative technology applications. One of the technologies being carried out is by installing underwater drinking water pipes. Taking into account the operational technical factors, at sea depths above 30 meters, several considerations need to be taken into account, given that installing pipes at these depths is difficult to control pipes manually, so additional equipment is needed for the safety of workers who will control the installed pipes, so this problem the best solution must be found. One problem that must be considered is the selection of pipe specifications that must meet technical requirements. Pipeline selection is carried out by conducting a study through the pipeline model and needs to be studied carefully and thoroughly so that the installed pipe is completely safe in the sea and does not suffer damage due to forces acting on the pipe caused by ocean currents, waves and underwater conditions others. The installation model that will be examined is the installation model suspended in the sea and installation on the sea floor. From the results of the analysis conducted on the pipe suspended in the sea with a depth of over 30 meters and the installation of pipes on the seabed shows that the pipe installed in the sea is more stable both from the effects of waves and ocean currents with a smaller depormation value compared to the pipe that is installed Suspended in in the sea. Pipe installed Suspended in the sea with a span of 2,500 meters and given a weight of 65 kg with a distance of 12 meters can experience vertical deflection down to 2,775,326 mm. Pipes placed at the bottom of the sea are more stable because the flow of waves and waves is already small so that the pipes are more stable and do not oscillate. The recommended pipe installation is seabed with pipe specifications in accordance with the conditions of the Hiri Strait, namely HDPE pipes with a nominal pressure of at least 25 bar.