Excess and Excess Symbols

AVEVA Marine has different means to compensate for the fact that parts when manufactured cannot be cut to the nominal dimensions according to the design intent. There are many reasons for this, for example,

• Butt welding may require gaps between parts to ensure proper weld penetration. This is considered in the AVEVA Marine bevel facility

• The fact that parts shrink during welding and other heating processes must be compensated for. This is considered in the AVEVA Marine shrinkage compensation facility

• In addition there may be bad fitting caused by accumulated errors in the fabrication and assembly processes. The traditional way to get a good final fitting is to add extra material that may be partially removed in the assembly process. This added material is in AVEVA Marine called excess and compensation.

The two first types of modifications are normally made automatically by AVEVA Marine from basic rules set up by the customer. In contrast excess and compensation should always be explicitly given by the designer.

This document gives some notes on excess and compensation in AVEVA Hull. Excess may be added to both plates and profiles. However, this document concentrates on excess in plates.