Section
19 Classification of units not built under survey
19.1 General
19.1.1 When classification is desired for a unit not built under the
supervision of LR's Surveyors, application should be made to the Classification
Committee in writing.
19.1.2 Periodical Surveys of such units, when classed, are subsequently to be
held, as in the case of units built under survey.
19.1.3 Where classification is desired for a unit which is classed by another
recognised Society, special consideration will be given to the scope of the
survey.
19.2 Hull and equipment
19.2.1 Plans showing the main scantlings and arrangements of the actual unit,
together with any proposed alterations, are to be submitted for approval. These
should comprise plans of the main hull/structure, including midship section,
longitudinal and transverse sections, columns, decks, pontoons, bracings, legs and
footings and such other plans as may be requested. If the class notation
DRILL or PPF is to be assigned in accordance with Pt 3, Ch 7 Drilling Plant Facility or Pt 3, Ch 8 Process Plant Facility respectively, plans and documentation covering the major
structures of the plant are to be submitted as may be requested.
19.2.2 If plans cannot be obtained or prepared by the Owner, facilities are to
be given for LR's Surveyor to obtain the necessary information from the unit. The
unit's Operations Manual is also to be submitted, see
Pt 3, Ch 1, 3 Operations manual.
19.2.3 Particulars of the process of manufacture, material grades and the
testing of the material of construction are to be supplied.
19.2.5 During the survey, the Surveyors are to satisfy themselves regarding the
workmanship and verify the approved scantlings and arrangements. For this purpose,
and in order to ascertain the amount of any deterioration, parts of the structure
will require to be gauged as necessary. Full particulars of the anchors, chain
cables and equipment are to be submitted. Loading instruments, where required, are
to be in accordance with the Rules, see
Pt 1, Ch 2, 1.4 General as applicable.
19.2.7 When the full survey requirements indicated in 19.2.4 and 19.2.5 cannot
be completed at one time, the Classification Committee may consider granting an
interim record for a limited period. The conditions regarding the completion of the
survey will depend on the merits of each particular case, which should be submitted
for consideration.
19.3 Machinery
19.3.1 To facilitate the survey, plans of the following items (plans of piping
are to be diagrammatic), together with the particulars of the materials used in the
construction of the boilers, air receivers and important forgings are to be
supplied:
- General pumping arrangements, including air and sounding pipes
(Builder's plan).
- Pumping arrangements at the forward and after ends of units with
crude oil bulk storage tanks and drainage of cofferdams and pump-rooms.
- General arrangement of crude oil storage piping in tanks and on
deck.
- Piping arrangements for bulk oil storage (F.P. 60°C or above,
closed-cup test).
- Bilge, ballast and fuel oil pumping arrangements in the machinery
space, including the capacities of the pumps on bilge service.
- Arrangement and dimensions of main steam pipes.
- Arrangement of fuel oil pipes and fittings at settling and service
tanks.
- Arrangement of fuel oil and gas piping in connection with oil and
gas burning installations.
- Fuel oil and bulk oil storage overflow systems, where these are
fitted.
- Arrangement of boiler feed systems.
- Fuel oil settling, service and other fuel oil tanks not forming
part of the unit's structure.
- Boilers, superheaters and economisers.
- Air receivers.
- Crank, thrust, intermediate and screw shafting.
- Clutch and reversing gear with methods of control.
- Reduction gearing.
- Propeller (including spare propeller if supplied).
- Azimuth thrusters.
- Electrical circuits.
- Hazardous areas.
- Arrangement of compressed air systems for main and auxiliary
services.
- Arrangement of lubricating oil, other flammable liquids and cooling
water systems for main and auxiliary services.
- General arrangement of crude oil storage tank vents. The plan is to
indicate the type and position of the vent outlets from any superstructure,
erection, air intake, etc. Ventilation arrangements of storage tanks and/or
ballast pump-rooms and other enclosed spaces which contain crude oil handling
equipment.
- Safety and communication systems, see Pt 3, Ch 1 General Requirements for Offshore Units.
- Jacking arrangements on self-elevating units.
19.3.2 Plans additional to those detailed in 19.3.1 are not to be submitted
unless the machinery is of a novel or special character affecting classification. If
the class notation DRILL or PPF is to be assigned in accordance with
Pt 3, Ch 7 Drilling Plant Facility or Pt 3, Ch 8 Process Plant Facility respectively, plans and documentation covering the plant are
to be submitted as may be requested.
19.3.3 Where remote and/or automatic controls are fitted to propulsion
machinery and essential auxiliaries, a description of the scheme is to be
submitted.
19.3.4 For new units and units which have been in service less than two years,
calculations of the torsional vibration characteristics of the propelling machinery
are to be submitted for consideration, as required for ships constructed under
Special Survey. For older units, the circumstances will be specially considered in
relation to their service record and type of machinery installed. Where calculations
are not submitted, the Classification Committee may require that the machinery
certificate be endorsed to this effect. When desired by the Owner, the calculations
and investigation of the torsional vibration characteristics of the machinery may be
carried out by LR upon special request.
19.3.5 The main and auxiliary machinery, feed pipes, compressed air pipes and
boilers are to be examined as required at Complete Surveys. Working pressures are to
be determined from the actual scantlings in accordance with the Rules.
19.3.7 The screwshaft is to be drawn and examined.
19.3.8 The steam pipes are to be examined and tested as required by Section
11.
19.3.9 The bilge, ballast and fuel oil pumping arrangements are to be examined
and amended, as necessary, to comply with the Rules.
19.3.10 Oil and gas burning installations are to be examined as required at
Complete Surveys and found, or modified, to comply with the requirements of the
Rules; they are also to be tested under working conditions.
19.3.13 The whole of the machinery, including essential controls, is to be
tested under working conditions to the Surveyor's satisfaction.
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