Section 1 Materials

Ch 2

101. General

1. These requirements are intended for single point moorings (hereinafter reffered to as "SPM") to be constructed of materials manufactured and tested in accordance with the requirements of these Chapter and where applicable, Pt 2 of "Rules for classification of Steel ships."

2. Where it is intended to use materials of different process, manufacture or of different properties, the use of such materials will be specially considered.

102. Structure

1. Materials used in the construction of the SPM buoy structure are to comply with Pt 2 of "Rules for classification of Steel ships."

2. Critical load carrying components in the mooring load path, such as hawser connection padeyes, are to be considered as primary application structure.

3. Materials used in the construction of the tower mooring structure are to be in accordance with Pt

2 of "Rules for classification of Steel ships." The use of other commercial material specifications for SPM applications will be specially considered.

103. Mooring system

1. Materials used in the construction of anchors, anchor legs, associated hardware, etc. are to comply with one of the following when applicable:

(1) Pt 2 of "Rules for Classification of Steel ships."

(2) National Standard or the Standard internationally recognized considered as equivalent by the Society (API Specifications 2F and 9A).

2. Where synthetic materials are used material specifications are to be submitted for review.

104

Cargo or product transfer systems

1. Materials used in the construction of cargo or product transfer systems are to comply with appro- priate material specifications as may be approved in connection with the application of usage.

2. The material specifications of previous 1. are to comply with National Standard or the Standard in- ternationally recognized considered as equivalent by the Society and are to specify a suitable range of established values for tensile strength, yield strength and ductility at design temperature.

3. Materials used in cargo or product transfer systems that will be exposed to hydrogen sulfide are to be selected within appropriate limits of chemical composition heat treatment and hardness to resist sulfide stress cracking.

4. Material selection is to consider the possibility of chloride stress cracking if chlorides are present in the cargo or product fluid.