船体制造公差

TECHNIQUE OF FLOOR PULLING-IN

1 Scope

The preparation, operator, technical requirement, workmanship procedure, and inspection of floor pulling-in technique are specified in the technical.

The technical applies to fitting of non-watertight floor of cargo ship and oil tank over 100k DWT constructed in Planar Panel Center with inner bottom or shell as base for bottom blocks, and with shell or longitudinal bulkhead as base for side blocks.

2 Preparation before Operation

2.1 Be aware of the assembly procedure and technical requirements of involved blocks;

2.2 Check code and accuracy of pieces；

2.3 Check status of Machines and tools。

3 Operator

3.1 The operator is to be trained and to pass the exam before operation.

3.2 The operator is to be familiar with the standard, and comply with technical discipline and site safe rules.

4 Technical requirement

4.1 Cutting and fabrication of Longitudinal

4.1.1 Free edge of flange and end surface of both flange and web should be grinded after cutting.

4.1.2 Perpendicularity errorδ2(as figure 1.)between web and flange should be less than ±1.5mm during fitting-up.

4.1.3 Center line error b(as figure 1.)between web and flange should be less than ±1.5mm during fitting-up.

4.1.4 Distortion should be corrected by fire fairing after welding.

4.1.5 T-bar tolerance：unevenness of flange is ±1.0mm per 2m，perpendicularity tolerance is±1.5mm; edge straightness is ±1.0mm per 2m，and ±1.5mm for whole piece.

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