Prastowo, Bagas Adiyan (2020) Total Stress Analysis on Subsea Pipeline During Installation. Case Study : Cluster I PT. PHE WMO. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
04311540000118-Undergraduate_Thesis.pdf Download (3MB) | Preview |
Abstract
Subsea pipeline or Offshore Pipeline is a way used to transport fluids in the form of oil, gas or 3 Phase fluids (fluids that containing oil, gas and water). Before the fluid can be drained from the facility to other facilities, the pipe installation stage must be carried out first. For the pipe installation itself is usually done by using a barge that has a stinger behind it. Stinger is a tool used as a helper installation of pipes by forming an overbend curve on the pipe in order to reduce the total stress on the pipe so that the pipe does not experience overstress. This final project calculates several influential variables to determine the success of an subsea pipeline installation. These variables are varied to find the most optimal variable configuration to reduce the total stress and strain during installation. Variables that are varied are depth, stinger radius of curvature and tension strength on the barge. The first stage is to do a static analysis of the data that has been determined where at this stage of analysis, the barge used for the installation is considered static and with no wave conditions. The results of the static analysis showed that the total amount of stress that occurred in the overbend critical region was 273.7 Mpa or equivalent to 76% of the SMYS pipe 8 inch API 5L grade X52. Whereas in the sagbend region was 80.7 MPa or equivalent to 22% of SMYS. Then the next step is to search for RAO of pipelay barge for further inclusion in a dynamic analysis where at this stage a 5 degree direction load is carried out by 0 °, 45 °, 90 °, 135 °, 180 °. In the results of dynamic analysis it was found that the most optimal design case is the second design case with a depth configuration of 53 meters, stinger radius of curvature of 300 meters and tension of 30 tons. This results of the design case have the smallest stress and strain values in almost every direction of loading.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 621.867 2 Pra a-1 |
| Subjects: | V Naval Science > VC Naval Maintenance > VC 270-279 Equipment of vessels, supplier,allowances,etc |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Prastowo Bagas Adiyan |
| Date Deposited: | 03 May 2024 07:44 |
| Last Modified: | 03 May 2024 07:44 |
| URI: | http://repository.its.ac.id/id/eprint/73647 |
Actions (login required)
 |
View Item |