ShipRight Notice 1A for

Transcription

1 ShipRight Notice 1A for Linked Supporting Services Planned Maintenance and Condition Monitoring, March 2013 The status of this ShipRight procedure is amended as shown and is now to be read in conjunction with this and prior Notices. Any corrigenda included in the Notice are effective immediately. Issue date: August 2015 Amendments to Effective date Section 6 August 2015 This Notice revokes Notice 1. Please refer to the amendment indicated by a change bar on page 2 of this document. Working together for a safer world

2 Lloyd s Register is a trading name of Lloyd s Register Group Limited and its subsidiaries. For further details please see Lloyd's Register Group Limited, its subsidiaries and affiliates and their respective officers, employees or agents are, individually and collectively, referred to in this clause as Lloyd's Register. Lloyd's Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Lloyd's Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.

3 MACHINERY PLANNED MAINTENANCE AND CONDITION MONITORING, March 2013 Machinery Planned Maintenance and Condition Monitoring Section 6 Screwshaft Condition Monitoring 6.1 Introduction These procedures define the parameters to be measured, frequency of measurement and methods for recording and evaluating data in order to determine the physical and operational condition of the screwshaft and associated bearings. Where all condition monitoring data is found to be acceptable and the Lloyd s Register Surveyors are in all other respects satisfied that the procedures have been properly followed, then the screwshaft need not be withdrawn from the stern bearing at the normal fiveyearly survey, dependent on propeller connection type. 6.2 Applicability Screwshaft Condition Monitoring can only be applied to oil lubricated screwshafts fitted with an approved oil sealing gland which is capable of being replaced without withdrawal of the screwshaft. The stern bearing may be lined with a metallic or non-metallic, composite material. The stern bearing is to have a facility for the measurement of bearing wear down and two temperature sensors or other approved arrangements are to be fitted. Regular analysis of the lubricating oil to trend the amount of bearing surface wear particles in the oil and to monitor the basic oil condition is required. Care is needed when analysing the lubricating oil from bearings lined with a metallic or non-metallic composite material. Screwshaft Condition Monitoring (SCM) may be applied to oil lubricated screwshafts, and water lubricated screwshafts which meet the requirements given in this document. 6.3 Details required for approval Oil lubricated screwshafts Details of the oil sealing gland. Details of the arrangements for taking bearing weardown measurements. It is to be confirmed that there is a system on board the ship for recording the following: Lubricating oil analysis carried out at regular intervals not exceeding six months. Each analysis is to include the following minimum parameters: (i) water content; (ii) bearing material, metal particles content and external contaminants; (iii) oil ageing (resistance to oxidation). The oil samples are to be taken under service conditions and are to be representative of the oil within the sterntube. A written procedure for the sampling of screwshaft lubricating systems should be kept with the analysis records and should be available for inspection by the Lloyd s Register Surveyor. See Annex B for guidance on lubricating oil sampling procedures and the interpretation of lubricating oil analysis results. Sterntube lubricating oil consumption. Sterntube bearing temperature (two temperature sensors or other approved arrangements). Sterntube bearing wear down. SCM may be applied to oil lubricated screwshafts fitted with an approved oil sealing gland which is capable of being replaced without withdrawal of the screwshaft or removal of the propeller. The stern bearing is to have a facility for the measurement of bearing weardown and the temperature of the sterntube bearings. Regular analysis of the lubricating oil to trend the amount of bearing surface wear particles in the oil and to monitor the basic oil condition is required. Temperature measurement records and oil analysis are to be available for review by attending Surveyors. Any trends indicating a change in the condition of the bearing are to be further investigated Details required for approval Details of the following arrangements are required for SCM scheme approval: Details of the oil sealing gland; Details of the arrangements for taking bearing weardown measurements; Details of the sterntube bearing temperature measurement and recording arrangements; Details of the arrangements for taking representative oil samples from the stern tube under service conditions. Each analysis is to include the following minimum parameters: (i) water content; (ii) chloride content; (iii) bearing material and metal particles content; (iv) oil ageing (resistance to oxidation), minimum testing to include viscosity and Total Acid Number (TAN) Scheme operating requirements 1

4 MACHINERY PLANNED MAINTENANCE AND CONDITION MONITORING, March 2013 The following records are to be maintained by the Chief Engineer and presented to the LR Surveyor at intervals not exceeding each Annual Survey, unless otherwise stated: Bearing temperature records; Oil consumption records; Oil analysis results. See Annex B for guidance on lubricating oil sampling procedures and the interpretation of lubricating oil analysis results. 6.4 Roles and responsibilities Water lubricated screwshafts Operator The Operator should make a formal request to Lloyd s Register for assignment of the ShipRight SCM descriptive note, submitting the information detailed in 4.3. For existing ships, a full tailshaft survey is normally required so that the initial condition of the shaft and bearing can be assessed. Where an application for an existing ship is received prior to the tailshaft survey, a memorandum noting that the descriptive note has been applied for and that the requirements are to be verified at the next tailshaft survey, will be added to the ship s survey record. SCM may be applied to open and closed water lubricated screwshafts fitted with an approved sealing gland which is capable of being replaced without withdrawal of the screwshaft or removal of the propeller. The shaft is to either be constructed of corrosion-resistant material or protected with a corrosion-resistant protective liner or coating approved by Lloyd s Register. Where a protective liner or coating is used, this is to meet the requirements of Lloyd s Register Rules and Regulations for the Classification of Ships (hereinafter referred to as the Rules for Ships), Pt 5, Chapter 6,6.3.9, and a means of assessing the condition of this liner is to be submitted and approved. Glands are to be capable of being replaced without withdrawal of the screwshaft. Regular analysis of the lubricating water to trend the amount of bearing surface wear particles in the system and to monitor the basic condition of the water is required. Records covering filter/ separator maintenance are to be available for review by attending Surveyors. Any trends indicating a change in the condition of the bearing are to be further investigated. Alternative arrangements are subject to special consideration Details required for approval Details of the following arrangements are required for SCM scheme approval: Details of the method of monitoring and recording variations in the flow of lubricating water using two independent sensors; Details of the method of monitoring and recording variations in transmitted shaft power; Details of an approved method of stern bush wear monitoring; A defined/stated weardown allowance which includes: (i) The absolute maximum weardown limit; (ii) The limit at which inspection and maintenance is required. Detailed alignment analysis which demonstrates that the system will operate satisfactorily between the defined weardown limits; For open loop systems, the details of the required standard of lubricating water filtration; For open loop systems, the details of the filters or separators required to achieve the water filtration requirements; Details of the turbidity and sediment measuring arrangements for open loop systems; Details of the arrangements for taking representative water samples from closed cycle systems for analysis. Each analysis is to include as a minimum: (i) Chloride content; (ii) Bearing material and metallic particle content. Details of the shaft starting/clutch engagement block to inhibit starting of the shaft until lubricating water flow has been established; Details of the approved alternative extractive and sampling and testing procedure, if this is required Scheme operating requirements The following records are to be maintained by the Chief Engineer and presented to the LR Surveyor at intervals not exceeding each Annual Survey, unless otherwise stated: Cleaning and replacement of water filters and separators; Turbidity and sediment measurement records; Records from the approved extractive sampling and testing procedure; For closed cycle water systems, water analysis records at intervals not exceeding six months; Records of any variations in the lubricating water flow rate and shaft power transmission. 6.5 Roles and responsibilities Operator The Operator should make a formal request to Lloyd s Register for assignment of the ShipRight SCM descriptive note, submitting the information detailed in 6.3/6.4. For existing ships, a full tailshaft survey is normally required so that the initial condition of the shaft and bearing can be assessed. Where an application for an existing ship is received prior to the tailshaft survey, a memorandum noting that the SCM descriptive note has been applied for and that the requirements are to be verified at the next tailshaft survey, will be added to the ship s survey record. 2

5 MACHINERY PLANNED MAINTENANCE AND CONDITION MONITORING, March 2013 Lloyd s Register Office The information will be reviewed and if acceptable the ShipRight SCM descriptive note will be assigned if requested. Chief Engineer The Chief Engineer should ensure that records of the condition parameters defined in the scheme operating requirements and are maintained on board. Lloyd s Register s Surveyors The condition records are to be inspected and audited annually by Lloyd s Register Surveyors, normally at the time of the Annual Survey. 3

6 Lloyd s Register Group Limited 2015 Published by Lloyd s Register Group Limited Registered office (Reg. no ) 71 Fenchurch Street, London, EC3M 4BS United Kingdom