Tài liệu này cung cấp chỉ dẫn về tiêu chuẩn chất lượng cấu trúc vỏ tàu trong khi đóng mới và sửa chữa, không áp dụng đối với các loại tàu đặc biệt như tàu chở khí đốt, tàu đóng từ các các loại thép đặc biệt…
PART A – SHIPBUILDING AND REPAIR QUALITY STANDARDS FOR NEW CONSTRUCTION
CONTENTS:
1. Scope
2. General requirements for new construction
3. Qualification of personnel and procedures
3.1 Qualification of welders
3.2 Approval of welding procedures
3.3 Qualification of NDE operators
4. Materials
4.1 Materials for structural members
4.2 Under thickness tolerances
4.3 Surface conditions
5. Cutting
5.1 Gas cutting
5.2 Plasma arc cutting
5.3 Laser beam cutting
6. Fabrication and fairness
6.1 Flange longitudinals and flange brackets
6.2 Built-up sections
6.3 Corrugated bulkheads
6.4 Pillars, brackets and stiffeners
6.5 Maximum heating temperature on surface for line heating
6.6 Block assembly
6.7 Special sub-assembly
6.8 Shape
6.9 Fairness of plating between frames
6.10 Fairness of plating with frames
7. Alignment
8. Welding
8.1 Typical butt weld plate edge preparation (manual welding)
8.2 Typical fillet weld plate edge preparation (manual welding)
8.3 Typical butt and fillet weld profile (manual welding)
8.4 Lap, plug and slot welding
8.5 Distance between welds
8.6 Automatic welding
9. Repair
9.1 Typical misalignment repair
9.2 Typical butt weld plate edge preparation repair (manual welding)
9.3 Typical fillet weld plate edge preparation repair (manual welding)
9.4 Typical fillet and butt weld profile repair (manual welding)
9.5 Distance between welds repair
9.6 Erroneous hole repair
9.7 Repair by insert plate
9.8 Weld surface repair
PART B -SHIPBUILDING AND REPAIR QUALITY STANDARD FOR EXISTING SHIPS
CONTENTS:
1. Scope
2. General requirements to repairs and repairers
3. Qualification of personnel
3.1 Qualification of welders
3.2 Qualification of welding procedures
3.3 Qualification of NDE operators
4. Materials
4.1 General requirements to materials
4.2 Equivalency of material grades
5. General requirements to welding
5.1 Correlation of welding consumables to hull structural steels
5.2 General requirements to preheating and drying out
5.3 Dry welding on hull plating below the waterline of vessels afloat
6. Repair quality standard
6.1 Welding, general
6.2 Renewal of plates
6.3 Doubler on plates
6.4 Renewal of internals/stiffeners
6.5 Renewal of internals/stiffeners – transitions inverted angles/bulb profiles
6.6 Termination of straps
6.7 Welding of pitting corrosion
6.8 Welding repairs of cracks
6.9 Grinding of shallow cracks
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