Analisis Tegangan dan Optimasi Ketebalan Insulasi Pipa Outlet Indirect Heater Menuju FWKO Tank pada Oil Plant Semberah Sangata Field

  • Elisa Dewanti Politeknik Perkapalan Negeri Surabaya
  • Heroe Poernomo Politeknik Perkapalan Negeri Surabaya
  • Pekik Mahardhika Politeknik Perkapalan Negeri Surabaya
Keywords: economical, heatloss, insulation, pipe support, stress analysis


The project construction of Oil Plant Semberah- Sangatta Field,built as a new facility to
replace the previous leased facility. There is a line design PL-123-A013-4” that flows fluid from
indirect heater to Wash (FWKO) Tank with a high operating temperature of 217.4 F. This line doesn’t
have insulation, so it is necessary to add insulation for maintain fluid temperature. In addition, this
pipe has an uneconomical pipe support design. Optimal insulation was selected based on the low heat
loss value, the temperature reduction ratio not more than 15% from design temperature, stress value
was safe below the allowable stress limit based on ASME B31.3 and total cost was affordable. Based
on these calculations, from nine variations, 25 mm thick Rockwool was chosen. The heat loss value for
this material is 786.90 Watt, and the temperature decrease is 1.468%. Stress value due to sustained,
thermal and occasional load of pipes with rockwool insulation of 25 mm in the entire segment is below
the allowable stress limit. From an economical point of view, this material is quite affordable with a
total cost of Rp. 4,345,500. Next, the design of steel structure pipe support is selected. Of the three
design variations based on economic analysis, the most affordable is the third design, namely the UBold
type pipe support installed on a T-post model steel structure with WH-beam 150x75 material with
a total cost of Rp. 3,072,040