Section 17 Pressure vessels for process and drilling plant

17.1.1 All pressure vessels are to be examined at the first Annual Survey after commissioning and subsequently at each Special Survey, see Pt 1, Ch 3, 2.3 Machinery 2.3.8 and Pt 1, Ch 3, 2.3 Machinery 2.3.9.

17.2.1 At the surveys described in 17.1, all pressure vessels are to be examined internally and externally. Principal mountings, supports and attachments to pressure vessels are to be examined, see also 17.2.4.

17.2.2 Where pressure vessels are so constructed that internal inspection is prevented by normal means, agreed tests are to be carried out to the satisfaction of the Surveyor.

17.2.3 Where, due to operational requirements, it is not possible to present all pressure vessels for inspection at the first Annual Survey, a sufficient number of pressure vessels from each system is to be examined, as agreed with the Surveyor, in order to establish the extent of corrosion and general condition of the system. The Owner's proposals for the inspection of the remaining pressure vessels are to be included in the Owner's planned maintenance and inspection procedure, as required by Pt 1, Ch 3, 1.6 Planned survey programme.

17.2.4 Selected pressure safety valves are to be bench tested in accordance with the requirements of Pt 1, Ch 3, 2.5 Production and oil storage units and Pt 1, Ch 3, 2.7 Drilling units. The Surveyor is to confirm that all pressure safety valves forming part of the process and drilling plant facility are examined and bench tested within each special survey cycle.