ANNEX I
ESSENTIAL SAFETY REQUIREMENTS
1. MATERIALS
1.1. Pressurised parts
1.1.1. Steel vessels
1.1.2. Aluminium vessels
1.2. Welding materials
1.3. Accessories contributing to the strength of the vessel
1.4. Non-pressurised parts
2. VESSEL DESIGN
2.1. Wall thickness
2.1.1. Calculation method
2.1.2. Experimental method
3. MANUFACTURING PROCESSES
3.1. Preparation of the component parts
3.2. Welds on pressurised parts
4. PUTTING INTO SERVICE OF THE VESSELS