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3. The technical documentation must enable the conformity of the transportable pressure equipment with the relevant requirements of Part 4 of these Regulations to be assessed and the design, manufacture and operation of the transportable pressure equipment to be understood.
The technical documentation must contain:
a general description of the equipment in question,
conceptual design and manufacturing drawings and diagrams of components, sub-assemblies, circuits etc.,
descriptions and explanations necessary for an understanding of the said drawings and diagrams and the operation of the equipment,
results of design calculations made, examinations carried out, etc.,
test reports,
appropriate details relating to the approval of the manufacturing and test procedures and of the qualifications or approvals of the staff concerned.