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Table 0. Seawater Properties



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FW Piping Material Comparison
Table 0. Seawater Properties
Parameter Value Units Fluid
Seawater
-
Density
1023
Kg/m3
Viscosity
0.837
cP
Temperature
32
ºC
Bulk Modulus
2.2
GPa
Vapour Pressure
0.03
bara

Since qualitative values are intangibles, the values are converted into numbers for further analysis. The summary of the data collected for qualitative values from the project are presented in Table 4.
Table 4. Summary of Qualitative Value for Material Candidates
Material
Candidates
Seawater
Corrosion
Performance
Availability
(Critical material
status)
Ease
manufacturing &
installation
GRE
5 5
2
Cu-ni
5 3
3
Titanium
5 2
2
SDSS
5 5
4
6 Mob

Open International Journal of Informatics (OIJI) Vol. 7 Special Issue (2019)
185
2.3 Phase III – Data Analysis
The method selected for data analysing the weight factor calculation is analytic hierarchy process (AHP) which is a theory of measurement which derives the ratio scales from both discrete and continuous paired comparisons [10]. In AHP, to model a problem of the hierarchy or a network structure to represent that problem, a pairwise comparison is established in relation to the structure. AHP provides away to make complex decisions in the most general structures encountered in real-life by deriving at the priorities for all factors and synthesising them for an overall outcome which includes quantitative and qualitative values [11]. The scale of relative importance is identified by using Table 5.
Table 5. Fundamental Scale [10]

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