LR V.4 Hull envelope plating
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 Liquid Chemicals in Bulk, July 2022 - LR V Structural Arrangements and Scantlings - LR V.4 Hull envelope plating

LR V.4 Hull envelope plating

Parent topic: LR V Structural Arrangements and Scantlings

LR V.4.1 General

LR V.4.1.1 The requirements for hull envelope plating as given for oil tankers in Pt 4, Ch 9, 4 Hull envelope plating* are to be applied, except as provided for in this Section.

LR V.4.2 Side and bottom shell plating in way of cargo tanks

LR V.4.2.1 Additional calculations and reinforcement may be required for side and bottom plating forming part of the boundary structure of a cargo tank which is intended for:

  1. the carriage of cargoes having relative densities in excess of 1,025; or

  2. pressure/vacuum relief valve settings which exceed a positive value of 0,20 bar gauge or a negative value of 0,07 bar gauge.

LR V.4.3 Deck plating in way of cargo tanks

LR V.4.3.1 Deck plating which forms part of the boundary structure of a cargo tank is to comply with the requirements of LR V.7 Cargo tank boundaries, in addition to the relevant requirements of Pt 4, Ch 9, 4 Hull envelope plating*.

LR V.4.3.2 Where a stainless steel cargo tank boundary forms part of the upper deck, the minimum deck thickness given in Pt 4, Ch 9, 4 Hull envelope plating* may be reduced by the following amounts:

  1. Solid stainless steel: 5 per cent or 1 mm, whichever is the greater.

  2. Clad stainless steel: 5 per cent.

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