Section 2 Annual Surveys – Hull and machinery requirements

2.1 General

2.1.1 Annual Surveys are to be held concurrently with statutory annual or other relevant statutory surveys, wherever practicable.

2.1.2 At Annual Surveys, the Surveyor is to examine the unit and machinery, so far as necessary and practicable, in order to be satisfied as to their general condition.

2.1.3 For ship units and other surface type units which are required by International Convention to comply with the International Safety Management Code (ISM Code - International Management Code and Revised Guidelines on Implementation of the ISM Code), the Surveyor is to review the overall effectiveness of the Code on board the unit. This is to be undertaken regardless of the organisation issuing the Safety Management Certificate (SMC).

2.1.4 For salt-water ballast tanks, other than independent double bottom tanks, where a protective coating is found to be in POOR condition, as defined inPt 1, Ch 3, 1.5 Definitions, and it has not been repaired, where a soft or semi-hard coating has been applied or where a protective coating was not applied from the time of construction, maintenance of class will be subject to the spaces in question being internally examined and gauged as necessary at Annual Surveys.

2.1.5 For independent salt-water double bottom tanks where a protective coating is found to be in POOR condition, as defined in Pt 1, Ch 3, 1.5 Definitions, and it has not been repaired, where a soft or semi-hard coating has been applied or where a protective coating was not applied from the time of construction, maintenance of class may, at the discretion of the Classification Committee, be subject to the spaces in question being examined and gauged as necessary at Annual Surveys.

2.1.6 For natural gas fuel installations see also Pt 1, Ch 3, 21.2 Survey Following Repair to Pt 1, Ch 3, 21.6 Annual Survey - Fuel Bunkering System.

2.2 Structure and equipment

2.2.1 At each Annual Survey the exposed parts of the hull structure, deck, deck-houses, superstructures and structures attached to the deck, including supports to drilling/process plant, derrick substructures, crane pedestals and other supporting structures, accessible internal spaces and the applicable parts listed under unit types, as specified in 2.2.2 to 2.2.5, are to be generally examined and the Surveyor is to be satisfied as to their efficient condition.

2.2.2 All unit types. The Surveyor is to be satisfied regarding the efficient condition of:

Hatchways, manholes and other openings in freeboard and superstructure decks or leading into buoyant spaces.
Machinery casings and covers, companionways, and deck-houses protecting openings.
Side scuttles and deadlights, and other openings in hull shell boundaries or in enclosed superstructures.
Ventilators and air pipes together with flame screens, fiddley openings, skylights, flush deck scuttles and overboard discharges from enclosed spaces. In addition, the Surveyor is to examine externally all air pipe heads installed on exposed decks.
Closing appliances for all the above, including check valves, hatch covers and doors, together with their respective securing devices, sills, coamings and supports.
Watertight bulkheads, and end bulkheads of enclosed superstructures.
Watertight doors and hatch covers in watertight boundaries, their indicators and alarms, to be examined and tested (locally and remotely), together with an examination of watertight boundary penetrations, so far as is practicable.
Freeing ports together with bars, shutters and hinges.
Windlasses and attachment of anchor racks and anchor cables.
Protection of the crew, guard-rails, life-lines, gangways and deck-houses accommodating crew.
The type, location and extent of corrosion control (i.e., coatings, cathodic protection systems, etc.), as well as its effectiveness, and repairs or renewals should be reported at each survey.

2.2.3 Column-stabilised units and tension-leg units. At the first Annual Survey subsequent to build, units are subject to examination of major structural components including NDE of critical areas, see alsoPt 1, Ch 3, 1.6 Planned survey programme and Pt 1, Ch 2, 3.5 Existing installations – Periodical Surveys. The Annual Survey is to include a complete bracing Close-up Survey, consisting of a detailed dry examination of all bracings and their structural connections to columns, pontoons and decks. The following critical regions are to be examined by approved methods of NDE:

Primary bracing shell plating, including butts and seams and welding in way of the toes of both internal and external brackets (i.e., axial gusset or diaphragm plates and stiffener ends).
Primary bracing shell plating and welding in way of changes of section, connections to main structure (e.g., columns, lower hulls, pontoons, decks, etc.) and intersections with other braces or node fabrications.
All penetrations and attachments to primary bracings including drain, vent and access holes, hydrophone mountings, together with edge reinforcements, attachments for cathodic protection (both sacrificial anodes and impressed current systems), and guard-rail mountings, eye plates or lugs, etc.
Diaphragm, bulkhead or deck plating and welding inside columns, pontoons or upper hull connection areas, in way of ends of primary bracings, local shear gussets between adjacent tube ends, and gussets, brackets of stiffeners forming a continuity of axial members from inside bracings. Also, column or deck plating and welded connections to bracings in way of internal diaphragm inside bracing.
Column connections to lower hulls, pontoons and upper hull structure, including internal supporting structure.
The structure in way of tether connections on tensionleg units.

It is important that an agreed procedure be established for the schedule of extent of examination and the proportion of NDE required at subsequent surveys, see also Pt 1, Ch 2, 3.5 Existing installations – Periodical Surveys. Specific critical regions are to be examined by approved methods of NDE. Column structure and upper hull structure where accessible above the waterline are to be generally examined.

2.2.4 Self-elevating units. At the first Annual Survey subsequent to build, units are subject to examination of major structural components, including NDE of critical areas, see alsoPt 1, Ch 3, 1.6 Planned survey programme andPt 1, Ch 2, 3.5 Existing installations – Periodical Surveys. The Surveyor is to be satisfied regarding the efficient condition of:

Jack-house structures and attachments to upper hull or platform.
Locking system.
Jacking or other elevating systems and leg guides, externally.
Legs as accessible above the waterline.
Plating and supporting structure in way of leg wells.
Drilling derrick support structure.

It is important that an agreed procedure is established for the schedule of extent of examination and the proportion of NDE required at subsequent surveys, see alsoPt 1, Ch 2, 3.5 Existing installations – Periodical Surveys. Specific critical regions to be examined by approved methods of NDE include the following:

Leg guides and hull support structure.
Leg well bulkheads below jacking tower or jack-house.
Connections between jack-house structure and main deck and underdeck supporting structure.
The jack-house roof above the jacking machinery (i.e., above the shock foundation) and in the vicinity of upper guide structure.
General inspection of bracings, gussets, chord joints and racks of the legs. Inspection of tubular or similar type legs including pin holes.
Leg connections to bottom mats or spud cans.
Drilling derrick supporting structure.

2.2.5 Ship units and other surface type units. The requirements of Pt 1, Ch 3, 2 Annual Surveys - Hull and machinery requirements of the Rules for Ships are to be complied with, as applicable. The Surveyor is to be satisfied regarding the efficient condition of:

The hull and deck structure around the drilling wells and moonpools and in the vicinity of any other structural changes in section, slots, steps, or openings in the deck or hull and the back-up structure in way of structural members or sponsons connecting the hull.

2.2.6 The Surveyor is to confirm that an approved Operations Manual and Construction Portfolio are available on board, seePt 3, Ch 1, 3 Operations manual.

2.2.7 Where applicable, the following are to be examined where accessible:

The hull and deck structure around turret openings and turret areas.
Turret bearings and seals.
Mooring arms and yokes.
Mooring arm pivots and bearings.
Process plant support stools and deck structure in way.
Swivel stack support structure.
Swivel stack bearing and seals.
Mooring hawser line and mooring arm attachments to the hull structure.
Mooring hawser to buoy.

2.2.8 The Surveyor is to confirm that, where required, an approved loading instrument, together with its operating instructions, is available on board, see Pt 1, Ch 2, 1.4 General. The operation of the loading instrument is to be verified in accordance with LR's certification procedure.

2.2.9 For disconnectable units with equipment in accordance with Pt 4, Ch 9 Anchoring and Towing Equipment, anchors, cables, windlasses and winches are to be examined so far as practicable.

2.2.10 For units fitted with positional mooring equipment in accordance with Pt 3, Ch 10 Positional Mooring Systems, an initial inspection is to be carried out following the installation of the positional mooring system, to ensure that the system has been properly installed, has not suffered damage and, through confirmation of agreed testing and maintenance procedures, that it continues to maintain the vessel in the defined safe envelope.

2.2.11 For positional mooring systems, a rota of component parts of the mooring system is to be examined at each Annual Survey. A periodic inspection program is to be developed by the Owners/Operators and submitted to LR for approval. Annual Surveys should be capable of determining as far as practicable the general condition of the mooring system, including cables, chains, fittings, fairleads, connections and equipment. The Surveyor is to be satisfied that all components and equipment remain in an acceptable condition. Particular attention is to be given to the following:

Cable or chain in contact with fairleads, etc.
Cable or chain in way of winches and stoppers (including underwater stopper if fitted).
Cable or chain in way of the splash zone.
Cable or chain anchor line tension alarms are regularly tested at agreed intervals.
Cable or chain tensions are regularly logged to confirm that agreed tensions have not been exceeded.

2.2.12 The Surveyor is to be satisfied regarding the freeboard marks on the unit's side.

2.2.13 The Surveyor is to be satisfied at each Annual Survey that no material alterations have been made to the unit, its structural arrangements, mooring system, subdivision, superstructure, fittings, and closing appliances upon which the stability approval and load line assignment is based.

2.2.14 The requirements of Pt 1, Ch 3, 3.2 Intermediate Surveys Pt 1, Ch 3, 5.3 Examination and testing, regarding the survey of water ballast spaces are also to be complied with, as applicable.

2.2.15 The Surveyor is to carry out an examination and thickness measurement of areas identified at the previous Special Survey or Intermediate Survey as having substantial corrosion, see Pt 1, Ch 3, 5 Special Survey – Hull requirements.

2.2.16 The Survey requirements for sea bed-stabilised units will be specially considered, but the requirements for column-stabilised and self-elevating units are to be complied with as applicable.

2.2.17 Survey requirements for units used for the storage of liquefied gas or chemicals will be specially considered.

2.2.18 Accessible areas on mooring buoys and mooring towers are to be generally examined.

2.3 Machinery

2.3.1 The main propulsion, essential auxiliary and emergency generators, including safety arrangements, controls and foundations, are to be generally examined. Surveyors are to confirm that Periodical Surveys of engines have been carried out as required by the Rules and that safety devices have been tested.

2.3.2 For units which are disconnectable in order to avoid hazards or extreme storm conditions, unless agreed otherwise with LR, the Surveyor is to examine and test in operation all main and auxiliary steering arrangements, including their associated equipment and control systems, and verify that log book entries have been made in accordance with statutory requirements, where applicable. For laid-up machinery, see Section 20.

2.3.3 The Surveyor is to inspect generally the machinery and boiler spaces, with particular attention being given to the propulsion system, auxiliary machinery, and any potential fire and explosion hazards. Emergency escape routes are to be checked to ensure that they are free from obstruction.

2.3.4 The means of communication between the navigating bridge and the machinery control positions are to be tested.

2.3.5 The bilge pumping systems for each watertight compartment, including bilge wells, extended spindles, selfclosing drain cocks, valves fitted with rod gearing or other remote operation, pumps and level alarms, where fitted, are to be examined and operated as far as practicable and all confirmed to be satisfactory. Any hand pumps provided are to be included.

2.3.6 Piping systems containing oil fuel, lubricating oil or other flammable liquids are to be generally examined and operated, as far as practicable, with particular attention being paid to tightness, fire precaution arrangements, flexible hoses and sounding arrangements.

2.3.7 The Surveyor is to be satisfied regarding the condition of non-metallic joints in piping systems which penetrate the hull, where both the penetration and the nonmetallic joint are below the deepest load waterline.

2.3.8 Boilers and other pressure vessels and their appurtenances, including safety devices, foundations, controls, relieving gear, high pressure and waste steam piping insulation and gauges, are to be generally examined. Surveyors are to confirm that Periodical Surveys of boilers and other pressure vessels have been carried out as required by the Rules and that the safety devices have been tested. Pressure vessels for process and drilling plant are to be examined in accordance with Pt 1, Ch 3, 17 Pressure vessels for process and drilling plant.

2.3.9 For boilers, the safety devices are to be tested and the safety valves are to be operated using the relieving devices. For exhaust gas heated economisers/boilers, the safety valves are to be tested at sea by the Chief Engineer and details recorded in the Log Book.

2.3.10 The operation and maintenance records, repair history and feed water chemistry records of boilers are to be examined.

2.3.11 Gas and crude oil burning systems are to be generally examined and safety devices tested. Surveyors are to confirm that Periodical Surveys have been carried out as required by Pt 1, Ch 3, 10 Boilers.

2.3.12 The electrical equipment and cabling forming the main and emergency electrical installations are to be generally examined under operating conditions, so far as is practicable. The satisfactory operation of the main and emergency sources of power and electrical services essential for safety in an emergency is to be verified; where the sources of power are automatically controlled, they should be tested in the automatic mode.

2.3.13 Bonding straps for the control of static electricity and earthing arrangements are to be examined, where fitted.

2.3.14 For units having UMS or CCS notation, a General Examination of automation equipment is to be carried out. Satisfactory operation of safety devices and control systems is to be verified.

2.3.15 For units fitted with a dynamic positioning system and/or a thruster-assisted positional mooring system, the control system and associated machinery items are to be generally examined and tested under operating conditions to an approved Test Schedule.

2.3.16 For units fitted with automation equipment for main propulsion, essential auxiliary and emergency machinery, a general examination of the equipment and arrangements is to be carried out. Records of changes to the hardware and software used for controlling and monitoring systems for propelling and essential auxiliary machinery since the original issue (and their identification) are to be reviewed by the attending Surveyor. Satisfactory operation of the safety devices and controls systems is to be verified.

2.3.17 For units fitted with an electronically controlled engine for main propulsion, essential auxiliary or emergency power purposes, the following is to be carried out to the satisfaction of the Surveyor:

Verification of evidence of satisfactory operation of the engine; where possible, this is to include a running test under load.
Verification of satisfactory operation of the safety devices and control, alarm and monitoring systems.
Verification that any changes to the software or control, alarm, monitoring and safety systems that affect the operation of the engine have been assessed by LR and are under configuration management control.

2.3.18 Dead unit starting arrangements for bringing machinery into operation without external aid are to be tested to the Surveyor's satisfaction.

2.3.19 Ballast control and indicating systems, along with audible and visual alarms, are to be examined and tested at both the main control station and each of the independent local control stations.

2.3.20 For self-elevating units, the jacking gear machinery and associated control system, including locking devices, are to be generally examined. A planned cycle is to be agreed with LR for the examination of critical components, i.e., pins, flexible hoses, couplings, gear reducers, etc., at each Annual Survey, supplemented where necessary by NDE, as agreed with LR.

2.3.21 Swivel stack including valves, manifolds and pipe connections are to be generally examined under working conditions, with special attention to damage due to mechanical handling, and all seals are to be checked for tightness. Suitable leakage tests may be carried out at the Surveyor’s discretion and results of the grease sampling programme provided upon request.

2.3.22 On a single point mooring installation, automatic warning alarms of load monitoring systems are to be tested.

2.4 Safety and communication systems and hazardous areas

2.4.1 The Surveyor is to be satisfied as to the efficient condition as far as practicable of the following systems, in accordance with Pt 7 SAFETY SYSTEMS, HAZARDOUS AREAS AND FIRE:

Fire and gas alarm indication and control systems.
Systems for broadcasting safety information.
Protection system against gas ingress into safe areas.
Protection system against gas escape in enclosed and semi-enclosed hazardous areas.
Emergency shut-down (ESD) systems.
Ventilation arrangements in hazardous areas around turret, swivel stack and mud processing areas are to be generally examined.
Protection system against flooding including:
1. Water detection alarm systems for watertight bracings, columns, pontoons, footings, void watertight spaces and chain lockers.
2. Bilge level detection and alarm systems on column- stabilised units and in machinery spaces on surface type units.
3. Remote operation and indication of watertight doors and hatch covers and other closing appliances.
Verification of the operation of manual and/or automatic doors.
Protection of accommodation areas against the ingress of smoke.

2.4.2 For units where flammable mixtures are or may be present, a general examination of electrical equipment located in hazardous areas and spaces is to be made, to ensure that it is suitable for the application and that the integrity of safe type electrical equipment has not been impaired due to corrosion, missing bolts, etc. Cable runs should be examined so far as can be seen for sheath and armouring defects and to ensure that means of supporting the cable are in good order. Alarms and interlocks associated with pressurised equipment or spaces are to be tested for correct operation, see also Pt 1, Ch 3, 2.2 Structure and equipment.

2.4.3 Satisfactory operation of automatic shut-down devices and alarms is to be verified.

2.4.4 Pressure vessels and safety devices are to be subject to surveys in accordance with the requirements of Pt 1, Ch 3, 10 Boilers and Pt 1, Ch 3, 17 Pressure vessels for process and drilling plant.

2.5 Production and oil storage units

2.5.1 For units with crude oil bulk storage tanks, in addition to the applicable requirements of Pt 1, Ch 3, 2.1 General, the following are to be dealt with where applicable:

Examination of oil storage tank openings including gaskets, covers, coamings and screens.
Examination of oil storage tank pressure/vacuum valves and flame screens.
Examination of flame screens on vents to all bunker, oily ballast and oily slop tanks and void spaces, so far as is practicable.
Examination of crude oil storage washing, bunker, ballast and vent piping systems, together with flame arresters and pressure/vacuum valves, as applicable above the upper deck within the oil storage tank area, including vent masts and headers.
Verification that no potential sources of ignition such as loose gear, excessive products in the bilges, excessive vapours, combustible materials, etc., are present in or near the oil storage pump-room and that access ladders are in good condition.
Examination of all pump-room bulkheads for signs of leakage or fractures, and in particular, the sealing arrangements of all penetrations in these bulkheads.
Verification that the pump-room ventilation system is operational, ducting intact, dampers operational and screens are clean.
External examination of the piping and shut-off valves of oil storage tank and oil storage pump-room fixed firefighting system.
Verification that the deck foam system and deck deluge system are in good operating condition.
Examination of the condition of all piping systems in the oil storage pump-room so far as is practicable.
Examination so far as is practicable of oil storage, ballast, bilges and stripping pumps for excessive gland seal leakage, verification of proper operation of electrical and mechanical remote operating and shutdown devices and operation of pump-room bilge system, and checking that pump foundations are intact.
Verification that installed pressure gauges on oil discharge lines and level indicator systems are operational.
Verification that at least one portable instrument for measuring flammable vapour concentrations is available, together with a sufficient set of spares and a suitable means of calibration.
Examination of any inert gas system, see 2.6.
For units greater than 15 years of age, all ballast tanks adjacent (i.e., with a common plane boundary) to a cargo tank with any means of heating are to be examined. Thickness measurement is to be carried out where considered necessary by the Surveyor. Special consideration may be given by the Surveyor to those tanks or spaces where the coatings are found in GOOD condition, as defined in 1.5, at the previous Intermediate or Special Survey.
For ballast tanks, in areas where substantial corrosion, as defined in Pt 1, Ch 3, 1.5 Definitions, has been noted, additional measurements are to be carried out in accordance with Pt 1, Ch 3 Periodical Survey Regulations of the Rules for Ships, as applicable. The survey will not be considered complete until these additional thickness measurements have been carried out.

2.5.2 Safety and communication systems and hazardous areas are to be examined in accordance with 2.4.

2.5.3 For units where the requirements of Pt 1, Ch 2, 1.4 General are applicable, the arrangements for fire protection, detection and extinction are to be examined and are to include:

Verification, so far as is practicable, that no significant changes have been made to the arrangement of structural fire protection.
Verification of the operation of manual and/or automatic doors where fitted.
Verification that fire control plans are properly posted.
Examination, so far as is possible, and testing as feasible, of the fire and/or smoke detection and alarm system(s).
Examination of fire main system, and confirmation that each fire pump, including the emergency fire pump, can be operated separately so that sufficient water can be produced to meet the greatest calculated demand in a credible emergency scenario.
Verification that fire-hoses, nozzles, applicators and spanners are in good working condition and situated at their respective locations.
Examination of fixed fire-fighting systems controls, piping, instructions and marking, checking for evidence of proper maintenance and servicing, including date of last systems tests.
Verification that all portable and semi-portable fire extinguishers are in their stowed positions, checking for evidence of proper maintenance and servicing, conducting random checks for evidence of discharges containers.
Verification, so far as is practicable, that the remote control for stopping fans and machinery and shutting off fuel supplies in machinery spaces and, where fitted, the remote controls for stopping fans in accommodation spaces and the means of cutting off power to the galley are in good working order.
Examination of the closing arrangements of ventilators, funnel annular spaces, skylights, doorways and tunnels, where applicable.
Verification that the fireman’s outfits are complete and in good condition.
Examination of the electrical installation in areas which may contain flammable gas or vapour and/or combustible dust to verify that it is in good condition and has been properly maintained.

2.5.4 For units with production and process plant in which Pt 7, Ch 3 Fire Safety applies, the arrangements for fire protection, detection and extinction are to be examined and are to include the applicable requirements of 2.5.3. In addition, the passive fire protection systems to the topsides process modules and associated plant shall be examined to verify, so far as practicable, that no significant changes have been made to the arrangement of structural fire protection.

2.5.5 In addition to the applicable requirements ofPt 1, Ch 3, 2.1 General , for units with a process plant facility having a PPF notation, the Owner is to submit to LR a planned procedure for maintenance and inspection of the process plant facility for review and agreement by LR from the Survey aspects in advance of the first survey, see Pt 1, Ch 2, 3.5 Existing installations – Periodical Surveys. A copy is to be kept on board and made available to the Surveyor. The planned surveys and procedures as agreed by LR will be subject to revision if found necessary at subsequent surveys or when required by the Surveyor.

2.5.6 The Surveyor is to be satisfied as far as is practicable as to the efficient condition of the following components to the process plant facility referred to in 2.5.5 as applicable, see also Pt 3, Ch 8 Process Plant Facility:

Major equipment and structures of the production and process plant.
Oil or gas processing system.
Production plant safety systems.
Production plant utility systems.
Relief and flare system.
Well control system.
Pressure vessels are to be subject to survey in accordance with the requirements of Pt 1, Ch 3, 17 Pressure vessels for process and drilling plant, see also 2.5.7.

2.5.7 Selected pressure safety valves are to be bench tested in accordance with a planned procedure for maintenance and inspection, see 2.5.5.

2.5.8 If the process plant facility is not classed but is certified by LR or another acceptable organisation, the survey and maintenance records of the process plant are to be made available to the Surveyor, who is to ensure that the records are up to date with no outstanding items which could affect the safety of the unit.

2.6 Inert gas systems

2.6.1 For inert gas systems, where fitted, the following are to be dealt with:

External examination of the condition of piping, including vent piping, above the upper deck in the crude oil storage tank area and overboard discharges through the shell as far as practicable, together with components for signs of corrosion or gas leakage/effluent leakage.
Verification of the proper operation of both inert gas blowers.
Checking the scrubber room ventilation system.
Checking, so far as is practicable, of the deck water seal for automatic filling and draining and checking for presence of water carry-over. Checking the operation of the non-return valve.
Testing of all remotely operated or automatically controlled valves including the flue gas isolating valve(s).
Checking the interlocking features of soot blowers.
Checking the gas pressure regulating valve automatically closes when the inert gas blowers are secured.
Checking, so far as is practicable, the following alarms and safety devices of the inert gas system, using simulated conditions where necessary:
1. High oxygen content of gas in the inert gas main.
2. Low gas pressure in the inert gas main.
3. Low pressure in the supply to the deck water seal.
4. High temperature of gas in the inert gas main.
5. Low water pressure to the scrubber.
6. Accuracy of portable and fixed oxygen measuring equipment by means of calibration gas.
Checking of the interlocking features and positive isolation for tank isolation.

2.7 Drilling units

2.7.1 In addition to the applicable requirements of Pt 1, Ch 3, 2.1 General, for units having a DRILL notation, the Owner is to submit to LR a planned procedure for maintenance and inspection of the drilling plant facility for review and agreement by LR from the survey aspect in advance of the first survey, see Pt 1, Ch 2, 3.5 Existing installations – Periodical Surveys. A copy is to be kept on board and made available to the Surveyor. The planned surveys and procedures as agreed by LR will be subject to revision if found necessary at subsequent surveys or when required by the Surveyor.

2.7.2 The Surveyor is to be satisfied as far as is practicable as to the efficient condition of the following components of the drilling plant facility referred to in 2.7.1, as applicable, see also Pt 3, Ch 7 Drilling Plant Facility:

Blow out preventer hoisting and handling equipment.
Blow out preventer, diverter and their control systems.
Choke manifold and associated valves.
Bulk storage.
Drilling fluids circulation and cementing equipment.
Drilling derrick and hoisting, rotation and pipe handling equipment.
Heave compensation equipment.
Miscellaneous drilling equipment and equipment considered as part of the drilling installation.
Well testing equipment.
Well protection valve and control systems.

2.7.3 Safety and communication systems and hazardous areas are to be examined in accordance withPt 1, Ch 3, 2.4 Safety and communication systems and hazardous areas.

2.7.4 Pressure vessels forming part of the drilling plant facility are to be subject to surveys in accordance with the requirements of Pt 1, Ch 3, 17 Pressure vessels for process and drilling plant, see also 2.7.5.

2.7.5 Selected pressure safety valves are to be bench tested in accordance with a planned procedure for maintenance and inspection, see 2.7.1.

2.7.6 If a drilling plant facility is not classed but is certified by LR or another acceptable organisation, the survey and maintenance records of the drilling plant are to be made available to the Surveyor, who is to ensure that the records are up to date with no outstanding items which could affect the safety of the unit.