Section 1 Equipment categories
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 3 Functional Unit Types and Special Features - Chapter 19 Equipment Categories - Section 1 Equipment categories

Section 1 Equipment categories

Parent topic: Chapter 19 Equipment Categories

1.1 Drilling equipment

1.1.1 A list of usual drilling equipment with its categories is given in Table 19.1.1 Usual drilling equipment with its categories .

Table 19.1.1 Usual drilling equipment with its categories

Systems and types of equipment Category Description of equipment
1. Well protection valves with control systems    
1.1 Blow out prevention    
1.1.1 Equipment 1A Hydraulic connector for wellhead
  1A Ram preventers
  1A Annular preventers
  1B Accumulators for sub-sea stack
  1B Sub-sea fail-safe valves in choke and kill lines
  1A Clamp
  1B Test stump
1.1.2 Control equipment 1A Electrical/electronic control systems
  1A Deadman systems
  1A Autoshear system
  1A Emergency disconnect system
  1B Accumulators in control system
  1B Welded pipes and manifolds
  II Unwelded hydraulic piping
  II Flexible control hoses
  II Hydraulic hose reel
  II Hydraulic power unit including pumps and manifold
  II Control pads
  1B Acoustic transportable emergency power package
  II Control panels
1.2 Choke and kill equipment 1A Choke manifold
  1B All piping to and from choke manifold
  1B Piping for choke, kill and booster lines
  1B Flexible hoses for choke, kill and booster lines
  1B Valves in choke, kill and booster lines
  1B Unions and swivel joints
  1B Emergency circulation pump – pressure side
1.3 Diverter unit 1A Diverter house with annular valve
  1B Diverter piping
  1B Valves in diverter piping
  II Control panel
  II Hydraulic power unit including pumps and manifold
2. Marine riser with control systems 1A Hydraulic connector
  1A Ball joint and flexible joint
  1A Riser sections including joints
  1B Support ring for riser tensioning
  1A Telescopic joint
  1B Accumulators
  II Hydraulic power unit including pumps and manifold
  II Control panel
3. Heave compensation    
3.1 Tensioning system for riser and guidelines 1B Riser tensioner
  1B Guideline and podline tensioners
  1B Hydro-pneumatic accumulators
  1B Pressure vessels
  1B Piping system
  II Air compressors
  II Air dryers
  II Wire ropes for tensioning equipment
  II Sheaves for riser tension line
  II Sheaves for guideline and podline
  1B Telescopic arms for tension lines
  II Control panels
3.2 Drill string compensator 1A Compensator
  1B Hydro-pneumatic accumulators
  1B Pressure vessels
  1B Piping system including flexible hoses
  II Air compressor
  II Air dryer
  II Wire ropes
  II Sheaves
  II Control panels
4. Hoisting rotation and pipe handling    
4.1 Drilling derrick 1A Derrick and substructure
4.2 Hoisting equipment for derrick 1B Sheaves for crown block and travelling block
  1A Crown block including support beams
  1B Guide track and dolly for travelling block
  1A Travelling block
  1A Drilling hook
  1A Swivel
  1B Links
  1B Elevators
  II Drilling line and sand line
  1B Deadline anchor
  1B Drawworks including foundation
  1B Air winches for the transport of personnel
  1B Cranes in derrick
  1B Cherry picker
  1B Personal hoisting equipment
4.3 Rotary equipment 1B Rotary table including skid adopter and driving unit
  II Kelly
  II Master bushing
  II Kelly bushing
  1A Top drive
4.4 Pipe handling 1B Racking arms with or without lifting head
  II Finger board
  II Tubular chute
  II Hydraulic cathead
  II Mousehole powered
5. Miscellaneous equipment for drilling 1B Manual tongs for pipe handling
  II Power tongs for pipe handling
  II Kelly spinner
  II Power slips
  1B Elevators for lifting pipe
6. Bulk storage, drilling fluid circulation and cementing    
  1A Drilling systems controls
  1B Hydraulic control systems
  II Hydraulic power units including ring lines
6.1 Bulk storage 1B Pressurised storage vessels
  1B Piping system for pressurised bulk transport
6.2 Drilling fluid, circulation and transportation    
6.2.1 Suction and transport System II II Piping systems for mixing of drilling fluid and suction line to the drilling fluid pump
(low pressure) II Centrifugal pumps for mixing drilling fluid
6.2.2 Well circulation system 1B Drilling fluid pump – pressure side
(high pressure) 1B Pulsation dampers
  1B Piping circulation of drilling fluid in the well
  1B Standpipe manifold
  1B Rotary hose with end connections
  1B Kelly cocks
  1B Non-return valve in drill string (inside BCP)
  1B Mixing pumps
  1B Safety valves
  1B Circulation head
6.2.3 Mud return system on deck II Mud return pipe
  II Dump tank
  II Shale shaker
  II Drilling fluid tanks
  II Trip tank
  II Desander, desilter
  1B Degasser
  1B Piping from degasser to burners or to ventilation
  II Chemical mixers
  II Agitators for drilling fluid
6.2.4 Cementing II Centrifugal pumps for mixing of cement
  II Piping system for mixing cement and suction line to the cement pump
  1B Cement pump – pressure side
  1B Pulsation dampener
  1B Piping for cement pump discharge
  1B Safety valves
7. Lifting system for blow out preventer 1A Blow out preventer crane/carrier, etc.
8. Miscellaneous equipment being part of the drilling installations See Table 19.1.2 Miscellaneous equipment forming part of the drilling installation Miscellaneous pipes, flanges, valves, unions, etc.
  1B Pressure vessels and separators
  1B Heat exchangers
  1B Pumps for overhauling of wells – pressure side
  II Other pumps
  II Burners
  1A Burner boom
  See Table 19.1.2 Miscellaneous equipment forming part of the drilling installation Safety valves for above equipment
NOTES
1. The equipment list is intended as a guide only and does not necessarily cover all the equipment items found in a drilling plant facility.
2. Equipment considered to be important for safety which is not listed in the Table will be specially considered by LR and categorised.

1.2 Miscellaneous equipment

1.2.1 A list of miscellaneous equipment forming part of the drilling installation is given in Table 19.1.2 Miscellaneous equipment forming part of the drilling installation.

Table 19.1.2 Miscellaneous equipment forming part of the drilling installation

Component Conditions Category
1B II
1. Piping Thickness of wall > 25,4 mm. X  
Design temperature > 400°C X  
All welded pipes and piping systems used in Category 1A and 1B piping systems X  
Pipes other than those mentioned above and pipes in Category II systems   X
2. Flanges and couplings Standard flanges and pipe couplings   X
Non-standard flanges and pipe couplings used in Category 1A and 1B piping systems X  
Flanges and pipe couplings other than those mentioned above, and flanges and couplings for Category II piping systems   X
3. Valves Valve body welded construction with ANSI rating > 600 lbs X  
Valves designed and manufactured in accordance with recognised standards   X
4. Components of high strength material Specified yield strength > 345 N/mm2 or tensile strength > 515 N/mm2 X  

1.3 Production equipment

1.3.1 A list of usual production equipment with its categories is given in .

Table 19.1.3 Production equipment with its categories

Systems and types of equipment Category Description of equipment
1. Christmas tree and sub-sea production system 1A Christmas tree, wellhead couplings, valves and control lines
1A Production manifolds and piping
1B Template and other floor structures
1A Well safety valve
II Electrical control module
2. Riser system    
2.1 Rigid 1A Riser sections
1A Hydraulic connector unit
1A Ball and flexible joints
1A Telescopic joints
1B Support ring for tensioning system
1B Valves and actuators
II Inflection restrictors
2.2 Flexible 1A Flexible riser
1A Connectors
1B Buoyancy elements
3. Riser tensioning system 1B Riser compensator
1B Hydro-pneumatic accumulator
1B Pressure vessel
1B Pipe system
II Wire ropes
II Sheaves
1B Telescopic arm for wire ropes
II Control panel
II Air compressor with drier
4. Hoisting and handling equipment for rigid riser 1A Derrick
1A Crown block with supporting beams
1A Travelling block
1B Hook
II Wire ropes
1B Air tuggers for personnel
II Air tuggers
1B Loose equipment for riser handling
1A Crane for handling production equipment
5. Oil production/processing equipment 1B Production manifold with valves
1B Separator
1B Heat exchanger
1B Gas liquid separator/cleansers
1B Gas compressor (pressure side)
1B Dehydrators
1B Crude oil loading pumps
1B Crude oil and gas metering equipment
1B Gas liquid separator tanks
1B Glycol contactor
II Water injection pump (pressure side)
1B Glycol injection pump with equipment
1B Oil protection and process shut-down equipment
1B Valves and pipes
1A Flare system
1A Pig launcher/receiver unit
II Instrumentation and control equipment
1A Swivel for production
6. Pressure vessels (general) 1B Pressure vessels
7. Miscellaneous equipment 1A Flare booms
1B Burners
II Instrumentation components in general
8. For well overhaul and maintenance equipment, see Pt 3, Ch 19, 1.2 Miscellaneous equipment. 1B Main instrumentation components and equipment in critical systems (e.g., control panels)
NOTES
1. The equipment list is intended as a guide only and does not necessarily cover all the equipment items found in a production plant facility.
2. Equipment considered to be important for safety which is not listed in the table will be specially considered by LR and categorised.

1.4 Mechanical and electrical equipment

1.4.1 A list of mechanical and electrical equipment and its categories for units in the production, storage and offloading of liquefied gases in accordance with Part 11 is given in Table 19.1.4 Mechanical and electrical equipment and its categories for units in the production, storage and offloading of liquefied gases in accordance with Part 11.

Table 19.1.4 Mechanical and electrical equipment and its categories for units in the production, storage and offloading of liquefied gases in accordance with Part 11

Systems and types of equipment Category Description of equipment
1. Mechanical and electrical equipment certification required 1A Boil off heater
1A Boil-off gas compressor
1A Turbo Expander
1A Gas heat exchanger
1B Burner
1B Flare
1B Cold vents
1A Columns – tray or packed type
  1A Tensioning system
  1A Structural bearings
  1A Cold vent boom
  1B Offloading hose
  1A Offloading hose end valve
  1A Pig launcher/receiver
  1A Hawser strong point
  1A Heat exchanger – Shell & tube, plate, annulus, printed circuit
  1A High pressure LNG pumps for vaporiser
  1A High pressure natural gas sent out system
  1A High pressure natural gas vaporiser
  II Pneumatic line thrower
  1B Generators and motors over 100 kW
  1B Uninterruptible power supplies, including battery chargers, with rating above 100 kVA
  1A Unloading arms (rigid type) including couplings
  1A Unloading arms (scissor, cantilever or A frame type) including couplings
  1B Explosion protected equipment if not carrying a certificate from a recognised test institution
  1B Filter strainers
  1B Air dryers – regenerative type
  II All other electrical equipment
  1B Main control panels
  1A Main storage tank discharge pumps
  II Instrumentation components
  TA Interbarrier space, insulation space or tank void relief valves
  1A Gas turbines > 110 kW rating
  1A Fire water pump skids (Package)
  1A Gas compressor skid (Package)
  1A Power generation skid
  1A Steam turbines
  1A Gears, shafts and couplings > 110 kW
  1A Lifting appliances: see LR’s Code for Lifting Appliances in a Marine Environment and hoisting and handling
  1A Subsea facilities
  1A Hydraulic and pneumatic power units
  1A Flexible risers
  1A Control umbilicals
  TA Cryogenic storage tank relief valves
  1A Storage tanks over 1000 L
  1A Fired pressure vessels
  1A Subsea systems
  1A Substructure (cofferdam) heating system
  1A Pressure vessels over 7 bar design pressure or 200ºF design temperature
  1B Pumps – Rotary, positive displacement, mono
  1B Quick release mooring hooks
  1B Engines over 110 kW
  1A Fire pumps and fire pump packages
  1A Switchboards
  1A Fixed fire-fighting system
  1A Fixed fire and gas detection system
  1B Utility pumps and air compressors
  1B Valves - general
  1B Expansion joint
  TA Expansion joint in cryogenic services
  1B Non standard valves
  1B ESD valve and actuator
  TA Expansion bellows
  1A Christmas tree block and valves
  1A HPU and pneumatic panels
  1A Dynamic positioning system
  1B IGS system
  TA Cargo hoses
  1A Cargo loading instrument
  1B Chemical injection skid – pumps, vessels, measurement
  1A Piping for Class I and Class II and boiler superheaters
  1A Mooring winches and windlass
  1A Nitrogen supply for storage tank containment system
  TA Spark arrestors and vent heads, PV valves
  1A Spray/circulation/supply pumps
  TA Mooring chain
  TA Hydraulic actuator
  TA Anchor
  TA GRE piping
  TA Resins
  1B Secondary or closed loop heating system for vaporiser
  1A Slug catcher
  TA Chokes
  1A Winches and windlasses
  1A Columns – tray or packed type
  TA Communication equipment
  1A Compressor – Centrifugal, rotary, reciprocating or screw
  TA Fire and gas control panel and indicator
  TA Master Mode switch
  TA Fire hoses
  TA Anodes
1. Marine system equipment to be built under survey as in Pt 5, Ch 1, 1 General See Note  
1A Main propulsion engines including their associated gearing, flexible couplings, scavenge blowers and superchargers
1A Machinery and equipment for lowering deck structures of self-elevating units
1A Boilers supplying steam for propulsion or for services essential for the safety or the operation of the ship at sea, including superheaters, economisers, desuperheaters, steam heated steam generators and steam receivers. All other boilers having working pressures exceeding 3,4 bar (3,5 kgf/cm2), and having heating surfaces greater than 4,65 m2
  1A Auxiliary engines which are the source of power for services essential for safety or for the operation of the ship at sea
  1A Steering machinery
  1A Athwartship thrust units, their prime movers and control mechanisms
  1B All pumps necessary for the operation of main propulsion and essential machinery, e.g., boiler feed, cooling water circulating, condensate extraction, fuel oil and lubricating oil pumps
  1A All heat exchangers necessary for the operation of main propulsion and essential machinery, e.g., air, water and lubricating oil coolers, fuel oil and feed water heaters, de-aerators and condensers, evaporators and distiller units
  1A Air compressors, air receivers and other pressure vessels necessary for the operation of main propulsion and essential machinery. Any other unfired pressure vessels for which plans are required to be submitted as detailed in Pt 3, Ch 11, 1.6 Lifting lugs or padeyes
  1A Valves and other components intended for installation in pressure piping systems having working pressure exceeding 7,0 bar
  1A Alarms and control systems as detailed in Pt 6, Ch 1 Control Engineering Systems and Pt 7, Ch 1 Safety and Communication Systems
NOTES
Items marked TA are to be type approved.
1. Category for gears, shafts and couplings is to be either 1A, 1B or II, depending on the category of the prime mover associated with the unit.
2. Fire water pump (directly driven) can be considered Category 1B. Fire water lift pump (not directly driven) of proven design may be accepted by conformation of material, witness of testing and review of fabrication documentation (1B). Fire water pump packages are to be built under survey (1A).
3. For complex machinery and equipment packages, categorisation and approval procedure to be agreed with on a case by case basis, considering selection of materials, service and complexity of design and fabrication method.
4. The approval procedure to be agreed with on a case by case basis, depending on function and criticality. See relevant Rule requirements, AS 4343, EC directives, Regulatory requirements, specific purchaser requirement.
Additional Notes for classed pressure vessel requirements. See also Pt 5, Ch 10,1.6.
Plans of pressure vessels are to be submitted in triplicate for consideration where all the conditions in (a) or (b) are satisfied:

(a) The vessel contains vapours or gases, e.g., air receivers, hydrophore or similar vessels and gaseous vessels for fire-fighting, and

pV > 600

p > 1

V > 100

V = volume (litres) of gas or vapour space.

(b) The vessel contains liquefied gases, for fire-fighting or flammable liquids, and

p > 7

V > 100

V = volume (litres).

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