Page 39: of Maritime Reporter Magazine (December 1999)

Great Ships of 1999

Builder Daewoo Originally planned

Vessel name OKHA and designed as the

Vessel type FSO third vessel in a trio

Owner ICB Shipping of three conventional

Crude Oil Tankers ordered by ICB Ship- ping, Daewoo con- structed the 158,000-

TDW Okha - modifi- cation to FSO.

Although the vessel had been aimed at operating not only in tanker mode, but also in FSO, efficient design and construction had been achieved economically through ICB & SBM's operational experience.

Prior to its designation as a crude oil tanker during the first half of 1999, Okha, which was delivered on May 11, is current- ly being operated as a FSO unit at Sakhalin oil field.

The vessel houses six pairs of cargo tanks and a pair of slop tanks in three segregation and 15 ballast tanks including peak tanks, which form double skin meeting MARPOL requirements.

Accommodation stands at 36 with four tiers and a navigation bridge. Total cargo capacity is 173,300 cu. m. and ballast capac- ity is 54,560 cu. m. As a noted FSO Unit, the vessel has equip- ment consisting of a bow cargo loading station, stern cargo offloading station and turbine type of metering unit with the steel support structure and a laboratory unit. Two sets of quick release mooring hooks provide for the single point mooring with a SALM buoy and an electro-hydraulically driven deck crane of offshore type is provided on the starboard side for handling offloading goods from the supply boat, cargo hoses and Suez mooring boat. One bow loading pipe of ND 300mm is arranged from loading station at portside and connected to the manifold cross-over line in midship, and a fire safe type ESD (Emergency

Shut Down) ball valve at loading station is remotely/hydrauli- cally controlled from CCR and the wheelhouse.

Builder Hyundai Heavy Industries

Vessel name Bunga Melati

Vessel type Chemical Tanker

Owner MISC

In early July, Hyundai Heavy Indus- tries delivered a 30,000-dwt chemical tanker to Malaysia International Ship- ping Corp. (MISC). The vessel, dubbed

Bunga Melati 4, is a double bottom and double skin chemical tanker with 34 cargo tanks including 16 stainless steel tanks. Classed by LR, the vessel is a single screw diesel engine driven ship of flush decker with forecastle and poop, with bulbous bow and open water type stern. The cargo area is divided by two longitudinal corrugated bulkheads and nine transverse corru- gated bulkheads. In the cargo tank sec- tion, the vessel has a double hull with side ballast tanks and a double bottom.

The ship is designed to carry chemical cargoes type 2 and 3 as specified in the

IMO IBC Code.

The cargo tank section of the Bunga

Melati 4 comprises 34 cargo tanks including 16 stainless steel 316 LN tanks, 16 coated (phenolic epoxy 300 mic) tanks and two slop tanks, each equipped with a hydraulic motor driven centrifugal submerged cargo pump (Framo type), with a capacity of 450- 250 cu. m./hr. for cargo tanks and 190 cu. m./hr. for slop tanks.

The internal parts of the stainless steel cargo tanks have been pre-treated by a local company that specializes in marine and industrial services, a com- pany which also took care of degreas- ing, pickling and passivation for the cargo tanks.

This pipeline arrangement allows the .connection of each tank separately to either starboard or port manifold outlet.

For cargo heating and tank cleaning purposes, all cargo tanks are fitted with stainless steel heating coils and clean- ing machines.

Heating is by steam. Gas freeing of the tanks is with mechanical ventila- tors, which are installed in a fan room.

N2 gas supply system with N2 bottle is provided for the ullage space of cargo tanks to compensate for normal losses during transportation. Each cargo tank and slop tank is provided with pressure sensor type level gauge.

The ship is powered by a six-cylinder in-line low speed, two stroke marine diesel engine, a Hyundai-B&W 6S50MC, which develops an MCR of 9,600 bhp at 119.6 rpm.

Capstan

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Standards. • High Starting Loads. • Electric, air or hydraulic. • Mountings to configure to existing foundations. • Extensive range of sizes.

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December, 1999 39