Optimal Design of Submarine Pipelines by a Genetic Algorithm with Embedded On-Bottom Stability Criteria

Table 4

Pipeline properties.

Parameter		Scenario 1	Scenario 2
Outside diameter (OD)		323.85 mm/ in	457 mm/18 in
Wall thickness		19.05 mm/ in	Depth (m)	Thickness
			0–300	17.5 mm/ in
			300–800	19.1 mm/ in
			800–1190	22.2 mm/ in
			1190–1535	25.4 mm/1 in
			1535–1800	28.6 mm/ in
Steel specific weight		77000 N/m^3
Corrosion coating			Thickness	Spec. weight (N/m^3)
	Thickness ()	76 mm/3 in	0.15 mm/0.006 in	14126.4
			0.20 mm/0.008 in	8829
	Spec. weight ()	8826 N/m^3	3.65 mm/ in	8829
			48 mm/ in	8829