Gas Inerte

INDEX

General Cargo Information
Arrangement of the Valves by Each Tank
Cargo Pipeline Capacities
Cargo Pipeline Capacities

Loading Operation
Loading Plan
Setting Lines and Valves
Scupper Plugs
Inert Gas Procedures
Emergency Shutdown Procedure (Loading)
Commencement of Loading
During Loading
Topping Off
After Loading

Discharging Operation
Discharging Plan
SettingLines and Valves
Scupper Plugs
Pump Operation Instructions
Inert Gas Procedures
Emergency Shutdown Procedure (Discharging
Commencement of Discharging
During Discharging

Crude Oil Washing (Cow)

Stripping

After Discharge

Diagram of Cargo Pipeline

Bibliography

CARGO OPERATIONS

All cargo operation must be planned and documented before their execution. The details of theplans must be discussed with all personnel, both on the ship and the terminal. Some safety checklists should be made or completed prior any cargo operations they could be the following:

 Cargo Operations Safety checklist A
 Loading Safety Checklist B
 Discharge Safety Checklist C
 COW Safety Checklist D

GENERAL CARGO INFORMATION

Manifold Lines 450mm (18") 13Kg
Drop Lines450mm (18") 13Kg
Discharge Lines 450mm (18") 13Kg
Suction Lines 500mm (20") 10Kg
Main Suction Valves 500mm (20") 10Kg
Slop Suction valves 300mm (12") 10Kg
Stripping Valves 200mm (08") 10Kg
Marpol Line 200mm (08") 10Kg
Ship's Maximum Loading Rate 75600 Bbls
Cargo Pumps 3X2500 m³/h. at 1560 rpm
Stripping Pump 1X250 m³/h
Cargo Eductor 2X250 m³/h
Tank Groud Nº 1 1COT, 4COT, 7COT
Tank Groud Nº2 2COT, 5COT, 8COT
Tank Groud Nº 3 3COT, 6COT, SLOPS
HI-JETS Lift at 1400mmwg pressure & -250mmwg vaccum
P/V BREAKER Blows at 1890mmwg pressure & -630mmwg vaccum
I.G alarms: HIGH 1250mmwg, LOW 200mmwg, L.LOW 100mmwg
COW Pressure 8.5 Kg for all washing
COW MACHINES 16X80m³/h. center tanks
COW MACHINES 4X50m³/h. slop tank

COW CYCLE BOTTOM 50 -0 grade 35 min
TOP 140 - 50 grade 35 minFULL 140 - 0 grade 60 min
COW TRIM 3m -4m / PORT LIST 2 - 3 grade

ARRANGEMENT OF THE VALVES BY EACH TANK

Tank Main Valve Stripping Valve
1COT OP101 OP102
2COT OP105 OP106
3COT OP109 OP110
4COT OP111 OP112
5COT OP113 OP114
6COT OP115 OP116
7COT OP117 OP118
8COT OP110 OP120
SST OP122 ----------
PST OP123 ----------

Tank Crossover Valves Transfer Valve
3COT OP103, OP104 &OP107, OP108 ---------
ST -------------------- OT121

CARGO PIPELINE CAPACITIES

Manifold Crossovers No 1 Line 5.7 m³ 36.0 bbls
No 2 Line 5.7 m³ 36.0 bbls
No 3 Line 5.7 m³ 36.0 bbls
TOTAL 17.1 m³ 108.00 bbls
Top Lines Fwd Of
Drop V/V No 1 Line 5.3 m³ 33.0 bbls
No 2 Line 5.3 m³ 33.0 bbls
No 3 Line 5.6 m³ 35.0 bbls
TOTAL 16.2 m³ 101.0 bbls
Top Lines Aft Of
DropV/V No 1 Line 9.5 m³ 60.0 bbls
No 2 Line 9.7 m³ 61.0 bbls
No 3 Line 9.5 m³ 60.0 bbls
TOTAL 28.7 m³ 178.0 bbls
Loading Drops No 1 Line 2.6 m³ 16.0 bbls
No 2 Line 2.6 m³ 16.0 bbls
No 3 Line 2.6 m³ 16.0 bbls
TOTAL 7.8 m³ 48.0 bbls
Bottom Lines No 1 Line 35.1 m³ 221.0 bbls
No 2 Line 30.8 m³ 194.0 bbls
No 3 Line 27.0 m³ 170.0 bbls
TOTAL 92.9 m³ 585.0 bbls
Pump roomNo 1 Line 2.6m³ 16.0 bbls
No 2 Line 2.6m³ 16.0 bbls
No 3 Line 2.6m³ 16.0 bbls
TOTAL 7.8m³ 48.0 bbls
CARGO PIPELINE CAPACITIES

Pumproom Main Crossover 2.2 m³ 14.0 bbls
Pumproom Stripping Crossover 0.8 m³ 5.0 bbls
MARPOL System 3.3 m³ 21.0 bbls

LOADING OPERATION

The responsibility for safe cargo handling operations is shared between the ship and the terminal. Beforestarting to load, the responsible officer and the terminal representative must formally agree that both the tanker and the terminal are ready to do so safely.

LOADING PLAN

Deballasting must be planned and programmed around the loading operation in order to avoid exceeding specified draught, trim or list requirements, while at the same time keeping shear force and bending moments within...