Management of Change (MOC)

Example of a Non-Standard Tank Cleaning Procedure

This Procedure has been issued providing guidance for a Non-Standard Tank Cleaning Operation and can be used also in case a cargo tank to be cleaned after a New Chemical Cargo (new to the company) not listed or available in Miracle.

This procedure shall NOT be used for similar or subsequent tank cleaning operations. A permanent procedure might be issued in such case accordingly.

Review Product Characteristics and Physical Properties

Product Name

Technical Name :

Commercial Name :

Shipper :

The Product characteristic and relevant data to be taken from the shippers SDS. If the same is not available a generic SDS and the information from the Miracle Tank Cleaning Guide might be used. Other Sources like the Chris Code, USCG Compatibility Chart and other industry information can be used for evaluation as well.

Y	N	NA	General Information
			The Cargo is an Annex I product
			Cargo listed in IBC code chapter 17 or 18
			If No, Cargo listed in the MEPC2/Circ. X
			SDS available
			Cargo in the COF
			Listed as Pollution Category “X” in the IBC code or MEPC.2 Cirx.X
			Coating resistant to the cargo
			Sampling equipment compatible with the cargo (Restricted or Closed)
			Filling limits according to stability booklet can be complied with
			FOSFA cargo
			Listed in FOSFA as banned prior cargo?
Y	N	NA	Cargo Hazard Information
			Flammable
			Toxic (according to IBC Chapter 17 column “k”)
			Carcinogenic (if Benzene content is > 0,5%)
			Corrosive
			Self-Reactive
			Reactive with / to Oxygen
			Reactive with Water
			Reactive with other cargoes (according to USCG CFR 46)
			High Viscosity Cargo
			High Density cargo
			Solidifying (heated) Cargo
			Static Accumulator
Y	N	NA	Pollution Hazards
			Floater
			Sinker
			Evaporator
			Dissolver (dissolves in Water)
Cargo properties
Density
Water Solubility
Melting Point
Boiling Point
Vapour Pressure
Viscosity
Flashpoint
LEL
UEL
Odour Limit

Hazards of the Cleaner / tank cleaning agent involved (see Cleaner SDS)
Cleaner	Hazard

Risk Assessment

Assessment of Potential Risk

Potential Hazards and Likelihood, taking industry data into consideration (see also guidance here).

Below is the outcome of the Risk Assessment.

P= People, E= Environment, A= Asset, R= Reputation

Y	NA	Hazard	Comment	P	E	A	R
		Flammable Chemical
		Toxic Chemical
		Self-reactive chemical
		Water reactive chemical
		Reactive chemical
		Solidifying cargo
		High Viscosity Cargo
		Hazard of Cleaner
		Other (please specify)

Risk Assessment Actual Risk

All existing procedures and existing technical barriers to be taken into consideration. If the Risk assessment will not result in ALARP additional Procedures might be written or additional technical barriers to be implemented.

Risk Mitigation

	Procedure and / or Technical Barriers
1
2
3
4

Actual Risk

Y	NA	Hazard	ALARP?	P	E	A	R
		Flammable Chemical
		Toxic Chemical
		Self-reactive chemical
		Water reactive chemical
		Reactive chemical
		Solidifying cargo
		High Viscosity Cargo
		Hazard of Cleaner
		Other (please specify)

ALARP As Low As Reasonably Practicable

Health and Safety

Cargo and Cleaner Hazards to Health:
Include relevant Company procedure

Required PPE:
Include relevant Company procedure
The PPE Matrix in the Miracle Tank Cleaning Guide might be used for assistance if not contrary to the company PPE Matrix.

Safety and Cargo (including Slop Tank) Reaction:
Include relevant Company procedure

Emergency Response:
Refer to the information in the SDS and the ERI card.

Approval Non-Standard Tank Cleaning Procedure

Date this procedure is in force _____________

DPA: Name____________________ Signature _____________

HSEQ Manager: Name____________________ Signature _____________

Date this procedure is void (after this voyage) _____________

Below is an example of a Non Standard Cleaning Procedure:

Example of a Non Standard Cleaning Procedure

SPECIFIC CLEANING PROCEDURE AFTER PREVIOUS CARGO LUBOIL BEFORE LOADING SODIUM CHLORATE SOLUTION	Done
First cleaning step (pre-cleaning)
Each tank to be butterworthed for 1,5 hours (4 tanks simultaneously) with hot seawater (Temperature = 70 to 80°C).
During cleaning following points to be observed:
Both sides of the respective manifold lines to be flushed
3 to 5 times under sufficient pressure ( 3-5 bar)
The drop lines to be cleaned 3 to 5 times by recirculation under sufficient pressure (3-5 bar).
The stripping lines to be flushed 3 to 5 times under sufficient pressure (3-5 bar).
All dead ends, drains and low points in the line systems to be flushed 3 to 5 times under sufficient pressure (3-5 bar).
Each Side of the manifold collecting line/main line (if in use) to be flushed 3 to 5 times under sufficient pressure (3-5 bar)
In order to clean the valves seats and to build up the required pressure, all valves in the line system including manifold collecting line/main line to be moved 3 to 5 times during cleaning.
Additional superstrip lines and vapour lock pipes (if installed) to be flushed 3 to 5 times under sufficient pressure (3-5 bar).
Second step (recirculation cleaning)
After the a.m. pre-cleaning 10m³ of fresh water/sea water and 2 pails of the CTC-Cleaner-VLC (40ltr) to be filled into one of the tanks to be cleaned or a service tank (see attached description of above cleaner).
Tanks and lines to be washed with the solution by recirculation
(to guarantee the proper cleaning of the complete line system the connection to the butterworth system to be carried out at the manifold collecting line /
main line). The cleaning temperature during the recirculation to be 60-70°C
During the recirculation cleaning following points to be observed:
Both sides of the respective manifold lines to be flushed 3 to 5 times under sufficient pressure ( 3-5 bar).
The drop lines to be cleaned 3 to 5 times by recirculation under sufficient pressure (3-5 bar).
The stripping lines to be flushed 3 to 5 times under sufficient pressure (3-5 bar).
All dead ends, drains and low points in the line systems to be flushed 3 to 5 times under sufficient pressure (3-5bar).
Each Side of the manifold collecting line/main line to be flushed 3 to 5 times under sufficient pressure (3-5 bar).
In order to clean the valves seats all valves in the line system including manifold collecting line/main line to be moved 3 to 5 times during flushing.
Additional superstrip lines and vapour lock pipes if installed to be flushed 3 to 5 times under sufficient pressure (3-5 bar).
Pump cofferdams (Framo) to be flushed with a solution of the CTC-Cleaner- VLC and purged.
During a.m. cleaning the vapour lines (vent stacks) and vapour return lines (if applicable) to be flushed and steamed. The cleaning solution (10m³) to be renewed after cleaning of 2-4 tanks.
Third step (fresh water rinse)
All tanks and lines to be flushed for 30 minutes with hot fresh water.
Fourth step (steaming)
All tanks and lines to be steamed for 1 hour.
Final step: Check of cleaning result
After a.m. cleaning procedure the line system to be dried by blowing with compressed air.
All connections (flanges) in the line system and critical points (dead ends) to be opened and checked for cleanliness.
After ejecting, mopping and drying the cleanliness of the tanks to be verified by a wall wash with Methanol (hydrocarbon test)