GUIDE TO APPROVAL OF RETROFIT BALLAST WATER MANAGEMENT SYSTEM INSTALLATIONS

Transcription

1 GUIDE TO APPROVAL OF RETROFIT BALLAST WATER MANAGEMENT SYSTEM INSTALLATIONS September 2016 DNV GL Approval Ship and Offshore Environmental Protection DNV GL Headquarters, Veritasveien 1, P.O.Box 300, 1322 Høvik, Norway. Tel: DNVGL BWMS Retrofit Guidance September 2016 rev. 1

2 Page 2 of 14 CONTENTS GUIDE TO APPROVAL OF RETROFIT BALLAST WATER MANAGEMENT SYSTEM INSTALLATIONS PURPOSE INTRODUCTION APPROVAL PROCESS, RULES AND REGULATIONS DOCUMENTS REQUIRED FOR BWM CONVENTION ELECTRICAL SYSTEM CONTROL SYSTEM FIRE SAFETY STABILITY STRUCTURE CONTAINERIZED BWMS INSTALLATION ON OPEN DECK OR IN CARGO HOLD DOCUMENTATION REQUIREMENTS... 13

3 Page 3 of 14 1 PURPOSE The purpose of this guidance document is to give a procedure to follow when a DNV, GL or DNV GL classed ship is subject to a retrofit installation of a ballast water management system (BWMS). The description includes all approvals required when a BWMS will be installed on board a ship classified by DNV GL in accordance with the BWM Convention. 2 INTRODUCTION The International Convention for the Control and Management of Ships' Ballast Water and Sediments (hereafter called the Convention) was adopted in 2004 by IMO. The BWM Convention was ratified 8 September 2016 and will enter into force one year later. The BWM Convention will require compliance for all ships and offshore structures regardless of age and size. The US Coast Guard (USCG) Regulations on BWM (33 CFR part 151 & 46 CFR part 162) entered into force 21st of June All ships calling US ports must have a treatment system installed acc. to the given implementation scheme. The implementation regime as given by IMO and USCG is given on our BWM homepage The IMO implementation schedule follows the IOPP renewal survey, while USCG refers to planned dry-docking.

4 Page 4 of 14 3 APPROVAL PROCESS, RULES AND REGULATIONS The DNV GL rules entered into force 1st January 2016 and will apply for the approval. For a retrofit installation of a BWMS, the conversion unit shall be contacted (conversions.osl@dnvgl.com for DNV vessels and coordination-conversion@dnvgl.com for GL vessels). A project manager for the document approval will be assigned the project and the owner shall specify if the vessel shall be granted a certificate and/or a class notation showing compliance with the BWM Convention after the retrofit installation. A ship specific list of required documents (to be submitted by owner) will be provided according to Chapter 11 of this document. Any retrofit installation must follow the DNV GL common rule set. The rules applicable for BWM can be found in DNV GL Rules for SHIP Pt.6 Ch.7 Sec.1. The document approval will be followed by an initial survey of the BWMS installation. The following chapters describe the documents and drawings to be approved by DNV GL for each individual ship system which will be affected by the retrofit installation. A summary showing all documents subject for approval are repeated in Chapter 11. Further details can be found in the specific class rules.

5 Page 5 of 14 4 DOCUMENTS REQUIRED FOR BWM CONVENTION When installing a BWMS, the existing piping system will be modified. DNV GL shall verify that the installation is carried out in according to the BWM Convention and applicable Rules to ensure functionality of the treatment system and safety for crew, environment and the vessel. The following documents will be requested. An updated P&ID of the ballast system is required, including BWMS and sampling facilities. A detailed drawing of the sampling port following Guidelines G2 of the Convention is to be included on the P&ID. If the BWMS is connected to other systems, these PID shall also be submitted, i.e: - Control air system piping diagram - Exhaust system piping diagram - Cooling system piping diagram - Bilge system diagram - Fresh water system diagram A Ballast Water Management Plan (BWMP) shall identify how BWMS is intended to be operated on the specific vessel in order to meet the requirements of the Convention. A BWM plan template is given on our homepage - The BWMP must reflect ship specific items such as the ballast eductor mode if applicable, external bypass if fitted, use of one/two/specific BW pumps simultaneously/special modes for internal circulation or semi-submersible vessels etc. Applied methods of filtration and disinfection are to be explained. Operational limits shall be provided for the BWMS (e.g. ph, salinity, temperature, humidity, turbidity, power consumption, holding time, UV intensity).

6 Page 6 of 14 - Should an approved BWM Plan covering the exchange method (D-1) already be in place, the stamped first page of the D-1-approved BWM Plan can be included as an Annex to the new BWM Plan covering the treatment method (D-2). The new BWM Plan for D-2 must be submitted for approval and shall make reference to the existing D-1-approved plan. - The manual can make reference to the BWMS Installation and Operation Manual. However the Manual shall be submitted as separate document. Type Approval Certificate (TAC) of the BWMS, issued by or on behalf of a Flag Authority - It is required that the flag state of the ship has explicitly accepted the type approval certificate issued to the BWMS. The manufacturer of the BWMS must submit such a statement to DNVGL. An Operation Manual (approved acc. to MEPC 175[58] as part of TA) shall be adapted to the equipment installed on board. It should contain a technical description of the BWMS, operational and maintenance procedures, and backup procedures in case of equipment malfunction. A commissioning procedure to be followed on board, preferably with a DNV GL surveyor attending. The procedure shall include an installation check, calibration check of critical sensors and an alarm check. Check of integration into existing ship systems shall also be part of the commissioning. A hazard analysis needs to be submitted if the BWMS is using or producing hazardous and harmful substances for human health or the environment, for example: - Systems using active substances (as defined in Resolution MEPC.169(57), Guidelines G9) - Systems using chemical injections or neutralizing agents - Any system producing flammable, toxic or explosive gases/ liquids such as chlorine, hydrogen, ozone, oxygen, nitrogen, hydrogen peroxide, acids etc. Such a hazard analysis is a class prerequisite for DNV GL to allow the system to operate on board ships classed with DNV GL. When the BWM Convention enters into force, the following documents are required to be on board: - Ballast Water Record Book - Approved BWM Plan according to D1 and/or D2 standard - An International Ballast Water Management Certificate

7 Page 7 of 14 5 ELECTRICAL SYSTEM Installation of a BWMS affects the electrical system of the vessel. To ensure the modification is carried out in a safe manner and following DNV GL Rules, DNV GL requests documentation addressing the changes to be submitted as one package. A description of the changes in the electrical system shall be submitted. The items below shall be submitted unless found not applicable for the specific installation. Not applicable items should be justified. Updated electrical power single line diagram shall be submitted showing where changes are done in the electrical system; correct short circuit level on the switchboards should be included. If the BWMS is arranged in a separate new distribution on board, this should be certified if over 100kW (ref. DNV Rules Pt.4 Ch.8 Sec.1 Table B3 if the vessel shall have BWM-T class notation). Drawings of the switchboard modifications shall be submitted as follows: - Cable and circuit breaker rating together with nominal current and effect of all new consumers. An updated electric load balance shall be submitted as follows: - New consumers to be added. - This can be based on original load balance from new-building phase or it can be based on measurements during condition in which is relevant for the upgrade. Documentation with a conclusion should be forwarded.

8 Page 8 of 14 Making and breaking of new circuit breakers shall be considered towards relevant short circuit level. - The relation between the valid short circuit level and the breakers making/breaking capacities shall be considered for: Existing installation with a need for new short circuit calculations; making and breaker capacity for all breakers, also existing installation. If no new short circuit calculation is required; making/breaking capacities for new circuit breakers should be considered towards the valid short circuit calculation (old one). - For new short circuit calculations, it shall be evaluated and concluded with regard to: Breakers currently installed in the switchboard and new breakers introduced (making/breaking capacities). System selectivity table or diagram showing upstream breaker towards largest downstream breaker.

9 Page 9 of 14 6 CONTROL SYSTEM The control system of the BWMS will have to be connected to existing systems on the vessel. DNV GL will request the following documents to verify that the implementation of the new control system has been performed according to DNV GL Rules. Description of the interface towards the ship s existing systems shall be submitted. The description must as a minimum include: - Description of the interface towards the ship s existing systems. The document shall specify the external signals that shall be communicated between BWM system and its remote control and transfer of control. Any failure of the BWM system shall give audible and visual alarm signals in all stations from which ballast water operations are controlled. Arrangement of the alarms for bypass of the BWMS system will be checked on board by attending surveyor If the BWMS is not type approved by DNV as a minimum the following documentation must be submitted: - Environmental testing (I080) or data sheets of components.

10 Page 10 of 14 7 FIRE SAFETY If the installation requires changes to the ship arrangement, special care has to be taken to the fire safety arrangement. The following considerations shall be made regarding fire safety. If the BWMS is located in a new compartment, the structural fire safety integrity, detection, escape arrangement etc. has to be evaluated. If the BWMS is located in an existing machinery space, this will normally not influence the fire safety arrangement. DNV GL will carry out approval of fire safety for the Cargo Ship Safety Certificate and Cargo Ship Safety Equipment Certificate if authorized by the flag administration. 8 STABILITY The installation of the BWMS might have an impact on the ships stability. In order to evaluate the impact, DNV GL will request the following documentation. In case lightweight change due to the installation of a BWMS will exceed 2%: - New Trim and Stability booklet with DNV GL approved lightweight shall be submitted for approval. - It might be required to carry out an inclining test. Alternatively DNV GL may accept lightweight calculation if the attending surveyor can easily verify weight and center of gravity of all installed equipment. The light weight calculation shall then be endorsed by the attending surveyor and submitted to DNV GL. Note: For passenger vessels an inclining test will be mandatory if the lightweight change exceeds 2%. In case lightweight change due to the installation of a BWMS is less than 2%, no update of stability documents is required. However, the weight and center of gravity of the ballast water treatment system installation must be recorded onboard. An updated Watertight Integrity Plan (Damage Control Plan) shall be submitted if the installation of the BWMS will change the vessel s watertight integrity such as: - Relocation of watertight bulkheads - New openings (external/internal) - New pipe routings in the damage zone which may lead to progressive flooding in case of breached pipes, Based on this, DNV GL will evaluate if the stability (intact and damage) documents need to be reapproved.

11 Page 11 of 14 9 STRUCTURE In order to evaluate how the structure will be influenced by the installation of a BWMS, DNV GL will request documentation regarding the impact on the ship structure. If static forces are higher than 50 kn or the moment is higher than 100 knm, an updated structural drawing reflecting the new arrangement, including supporting structure and information on reaction loads, shall be submitted for approval.

12 Page 12 of CONTAINERIZED BWMS INSTALLATION ON OPEN DECK OR IN CARGO HOLD Several aspects are to be considered when installing BWMS in a container on open deck: design criteria for compartment defined as machinery space enlaced by cargo containers: strength for wave loads depending on location, fire protection, safe access, permanent use in lowest tier, over stowage Access: accident prevention regulations to be observed ladder is not accepted, instead stair (max inclination angle 60 ) with upper platform to be provided, location to be shifted to CL, one container stack would get lost Door to be secured in open position, end position stopper sliding door may be considered (smaller platform, accident prevention) Fixation: twist locks to be additionally locked in closed position Movement of container compensators for pipes are needed (movement for container if fitted with twist locks: longitudinal up to 6mm, transversal up to 13mm) Container certification: the existing CSC approval certificate of the container will be invalid by cut-outs for penetrations (ventilation, pipes, cables etc) and access door new CSC Cert can be applied for, depending on wall thickness, fire protection rating will be certified standard containers are not designed for permanent over-stowage, structural strengthening to be considered, loads to be defined by owner depending on location Fire protection: wall thickness of 1,6mm will not comply with the required A-0 standard acc. to SOLAS for boundaries between class 7 and class 10 For A-0 standard min. 5mm + stiffeners are needed if a standard container is used, equivalent fire protection (e.g. by additional fire alarm system, fire fighting system to be defined) can be finally confirmed only by flag if stowed in C/H potential fire load is external, thus: SD system and/or insulation is recommended anyway Applicable additional rules: Beside the class of the vessel additional rules, e.g. for offshore containers, may be applied as an accepted industry standard

13 Page 13 of DOCUMENTATION REQUIREMENTS All the documents required for approval of the BWMS installation with regards to the BWM Convention, Piping, Electrical, Control, Fire Safety, Stability and Structure are repeated in the list below. Item shall be submitted as three stand-alone PDFs. Ref No 1 Documentation type Piping diagram Conditions / Info. Ballast water system with modification arrangement (including sample port details). Ref G8 Guidelines Item BWMS Operation Manual Ballast Water Management Plan Type approval certificate (TAC) Statement for acceptance of the BWTS Hazard analysis Commissioning procedure Bilge system piping diagram Ventilation piping diagram Access arrangement Piping diagram General Arrangement Electrical systems Approved by the Administration. Ref G8 Guidelines Item Ship specific operational details of ballast water management. Ref Regulation B-1 From administration (not class). Ref G8 Guidelines Item 6.3 If flag state of the ship is not the same as the administration which has issued TAC. Such statement from the flag shall include acceptance of the TAC from the other administration If the BWTS is using or producing hazardous and harmful substances for human health or the environment Installation specific commissioning and calibration procedure specific to the system. Approved by the Administration in compliance with the G8 Guidelines Item If the BWTS is arranged within a new compartment Bilge system, cooling system, fuel oil etc. if modified Drawing indicating location of new installation (Treatment equipment, control system panels) 11 Description of changes Changes in the electrical system Updated electrical power single line diagram Making and breaking capacities of new circuit breakers Including: -New consumers, indicating power and nominal current -Cable size -Setting of new circuit breakers w.r.t. overcurrent and short circuit protection -Correct short circuit level on the switchboard (if existing b breakers are used this is NA) If existing b breakers are used then NA. 14 Updated electric load balance If total new load is below 100 kw than NA

14 Page 14 of 14 Ref No Documentation type Selectivity between new circuit breakers and upstream existing circuit breakers Emergency stop of new fans (if relevant) Updated EX documentation according to Pt.4 17 Ch.8 Sec.11 Control systems Interphase description (I220) Environmental testing (I080) or data sheets of components. Fire Safety Stability Structure 27 Structural fire safety integrity, detection, escape arrangement etc. Cargo Ship Safety Certificate and Cargo Ship Safety Equipment Certificate Conditions / Info. If required Required if any new fan capable supplying air or any fuel or lube oil pump will be installed Required if flammable, explosive gases will be created during process e.g hydrogen or similar Description of the interface towards the ship s existing systems. The document shall specifythe external signals that shall be communicated between BWM system and its remote control and transfer of control. Any failure of the BWM system shall give audible and visual alarm signals in all stations from which ballast water operations are controlled. Only applicable if BWTS not Type Approved by DNV Only if the BWTS is located in a new compartment Only if the BWTS is located in a new compartment and if DNV is authorized by the flag administration Lightship calculation Calculation of weights on/off with resulting new lightship particulars. This calculation shall be verified by a DNVGL surveyor (unless an inclining test is carried out). Inclining test report If the lightship calculation indicate change in weight of more than 2% or 1% (of Lpp) in LCG an inclining test, witnessed by DNV GL shall be carried out. New Trim and Stability booklet If installation of a BWTS will exceed 2% lightweight change An updated watertight integrity plan New damage stability calculations Updated structural drawing If the installation of the BWTS will change the vessel s watertight integrity If deemed necessary due to lightship or WT integrity changes. If static forces are higher than 50 kn or the moment is higher than 100 knm