LR III.4 Additional Class notation
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Construction and Classification of Ships for the Carriage of Liquefied Gases in Bulk, July 2022 - LR III Classification, Class Notations and Descriptive Notes - LR III.4 Additional Class notation

LR III.4 Additional Class notation

  LR III.4.1 The class notation APBU (maximum duration in days) will be assigned when the notation (design) vapour pressure allows the cargo to warm up during the duration of the voyage with the purpose of containing the boil-off gas (BOG) within the cargo tanks during normal operations. The insulation and the allowable maximum vapour pressure will be considered when determining the maximum voyage length at the ambient design temperatures stated in Ch 7,7.2. The given duration of voyage is to have a suitable margin, for the operating time and temperatures involved, which is to be acceptable to the Administration, see Ch 7,7.5. The design vapour pressure will be no greater than permitted by the definitions of containment systems in Ch 4, 4.1.2. Compliance with paragraphs LR 7.2-01, LR 15.1-03, and LR 18.1-02 is required.

Parent topic: LR III Classification, Class Notations and Descriptive Notes
Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications 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 Clasifications 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.