Section 3 Materials
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 3 Functional Unit Types and Special Features - Chapter 12 Riser Systems - Section 3 Materials

Section 3 Materials

Parent topic: Chapter 12 Riser Systems

3.1 General

3.1.1 The type and grade of materials chosen for the risers, valves and associated equipment are to be in accordance with the Rules for Materials or a recognised National or International Standard. In cases when a specification is not covered by LR’s Rules, full details of the material specification, testing documentation and all properties are to be submitted for approval.

3.1.2 Materials are to be selected in accordance with the requirements of the design in respect of carriage of the product, strength, fatigue, fracture resistance and corrosion resistance.

3.1.3 Due consideration is to be given to temperature and other environmental conditions on the performance of the material, including toughness at the minimum operating temperature, the effects of corrosion, and other forms of deterioration both in service and whilst being stored or handled.

3.1.4 Riser material for -contaminated products (sour service) is to comply with the NACE MR0175/ISO15156 - Petroleum and Natural Gas Industries – Materials for use in -containing Environments in Oil and Gas Production, see Pt 12, Ch 1 Recognised Codes and Standards

3.1.5 Steel grades for operation in areas where the design air temperature is below minus 20°C and in severe ice conditions (e.g., arctic waters), will be specially considered.

3.1.6 An approved system of corrosion control is to be fitted, where appropriate. Full details are to be submitted, see Pt 8, Ch 1 General Requirements for Corrosion Control.

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