Iranian Classification Society Rules

SECTION 2 Classification

201. Character of classification

The class notations assigned to the drilling system classed with the Society are to be in accordance with Pt 1, Ch 1, 201. of Rules for the Classification of Steel Ships except that a notation "Drilling System" may be given as an additional installation notation.

202. Maintenance of classification

203.

All ships classed with the Society are, for continuation of the classification, to be subjected to the periodical and other surveys, and are to be maintained in good condition in accordance with the re- quirements of this Chapter.

When a ship classed with the Society makes an alteration or modification of such an extent as to influence to the ship's original performances, the plans have to be submitted for the Society's ap- proval before the work is commenced and the alteration work has to be supervised by the Surveyor.

Classification survey during construction

1. General

Drilling systems are to be examined in detail in Classification Survey during Construction in order to ascertain that they meet the appropriate requirements of the Annex.

2. Submission of plans and documents

(1) For drilling systems, the following plans and documents are to be submitted for the approval of the Society at classification survey during construction before the work is commenced.

(A) Entire drilling system

(a) General arrangement showing locations of all machinery, equipment, structures for drill- ing operations and locations of all control panels and stations for drilling systems.

(b) Piping & instruments diagrams associated with the drilling systems

(d) Detailed arrangements of the well test areas or location of well test equipment

(e) Escape and egress routes, including their protections, and muster stations

(f) The locations of openings (air intake, exhaust, windows, doors, etc.) for all closed spaces

(g) Ventilation arrangements

(h) HAZOP or HAZID study reports for the essential drilling systems

(i) Drawings identifying hazardous areas in accordance with Ch 7 of the Rules.

(B) Well Control Systems

(a) Blowout preventer systems

(i) Design data (description of the well control systems, design pressure and temper- ature, shutdown logic, details on hierarchy of control(primary, secondary, emergency,

Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015 15

etc.), applicable codes and standards)

(ii) Piping & instruments diagrams

(iii) Equipment technical specifications

(iv)Failure Modes and Effects Analysis, FMEA for the complete integrated drilling sys- tems

(v) All control panel arrangements for well control of BOP systems

(vi) Design of BOP stack including the followings.

- Design parameters such as design pressure and temperature, loads, maximum water depth, service conditions, etc.

- Dimensional detailed drawings and fabrication details

- Material specifications

- Individual BOP (annular and ram) details to attest appropriate BOP capability with regard to drill pipe size, tool joints, casing, wire line and combination of them

- Documentation to confirm the shear rams capability of shearing the various tubu- lars (sizes, grades, strengths, etc.) under the specified design conditions

- BOP stack assembly drawings for BOP systems showing stack configuration show- ing all equipment, structural frame details, lift points/attachments, arrangements

showing accumulators, pods, valves, piping, connectors, jumper lines, etc.

- Design details and structural analysis for BOP structural frame and lifting attach- ments

(vii) Subsea control pods drawings and associated calculations

(b) Lower marine riser package

(i) Design data (load cases and limit states for all design and operating conditions, de- sign analysis methodology, applicable codes and standards)

(ii) Equipment technical specifications

(iii)Design analysis of mechanical-load bearing components and pressure-retaining equipment

(iv) Annular BOP

(v) Connector details

(vi) LMRP structural frame

(vii) Material specifications

(i) Design data (design pressure and temperature, applicable codes and standards)

(ii) Piping & instruments diagrams

(iii) Equipment arrangement

(iv) Equipment technical specifications

(d) Diverter systems

(i) Design data (design pressure and temperature, applicable codes and standards)

(ii) Piping & instruments diagrams

(iii) Equipment arrangement

(e) Design details for auxiliary well control equipment include kelly valves, drill pipe safety valves, drill string float valves, etc.

(a) Design data (load cases and limit states for all design and operating conditions, design analysis methodology, assumptions used in the global design analysis of the marine drill- ing riser system and design analysis of its components, applicable codes and standards)

(b) Design analysis

(d) Riser and its components fabrication drawings

(e) Material specifications

(D) Drill string compensation systems

(a) Design data (Load capacity, design pressure and temperature, applicable codes and stand- ards)

(b) Piping & instruments diagrams

(E) Bulk storage, transferring and mud circulating system

(a) Design data (design pressure and temperature, design medium, applicable codes and standards)

(b) Piping & instruments diagrams

16 Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015

(d) Drawings of prime movers such as engines and motors

(f) Drawings of pumps

(F) Hoisting, lifting, pipe handling system

(a) Derrick drawings including the followings

(i) Applicable codes and standards

(ii) Derrick structure drawing

(iii) Design condition

(iv) Combined load cases and limit states for all design and operating conditions

(v) Assumptions used in the design analysis of the derrick structure and associated components

(vi) Corrosion control plans

(vii) Manufacturing specifications

(viii) Design analysis methodology for the derrick structure and associated components,

and component analyses including computer modeling and computer program

(ix) Structural analysis report

(x) General arrangement drawings

(xi) Derrick assembly drawings

(xii) Crown block assembly drawings

(xiii) Water table assembly drawings

(b) Crane drawings including the followings

(i) Applicable codes and standards

(ii) Equipment technical specifications

(iii) Load cases and limit states for all design and operating conditions

(iv) Wire rope specifications

(v) Material specifications

(vi) General arrangement

(vii) Crane capacity rating chart

(viii) Welding details and procedures

(ix) Procedures of non-destructive testing

(x) Procedures of load tests

(xi) Stress analysis and other supporting calculations

(i) Applicable codes and standards

(ii) Equipment technical specifications

(iii) Design load and temperature

(iv) Prime mover power rating

(v) Assembly drawings

(vi) Equipment drawings

(vii) Dimensional detailed drawings

(G) Well testing system

(a) Well testing system drawings including the followings

(i) Descriptions of the well testing system, and well test equipment

(ii) General arrangement

(iii) Piping & instruments diagrams

(iv) Design pressure and temperature

(v) Shutdown logic

(vi) Gas dispersion and flare/heat radiation analyses

(vii) Equipment technical specifications

(viii) Applicable codes and standards

(b) Well testing equipments drawings including the followings

used

(i) Design parameter such as design pressure, design temperature, maximum etc.

(ii) Design analysis to justify safety factor

(iii) Dimensional detailed drawings and fabrication details

(iv) Material specifications

(v) Structural design analysis for skid mounted equipment

(i) Design conditions

water depth,

(ii) Combined load cases and limit states for all design and operating conditions

(iii) Equipment list

Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015 17

(iv)Equipment technical specifications

(v) Assumptions used in the design analysis of the burner flare boom structure and as- sociated components

(vi) Applicable codes and standards

(vii) Design analysis methodology for the burner flare boom structure and associated components, and component analyses including computer modeling and computer program used

(viii) Material specifications

(ix) Arrangement drawings

(x) Structural drawings

(xi) Structural analysis report

(xii) Base plate and anchor bolt plan

(H) In addition to plans and data required by (B) to (G), following drawings are to be sub- mitted, as applicable.

(a) Electric equipment plans and data in accordance with Ch 2, 204. 2 (1) (B) (c) of the

Rules.

(b) Control system drawing including the following.

(i) Arrangement plans showing location of units controlled, instrumentation and control devices

(ii) Specifications for control and instrumentation equipment

(iii) Set points for control system components

(vi) Control system detail including the followings

- Details on hierarchy of controls: primary, secondary, emergency

- Volumetric capacity calculations for the accumulator systems, primary and secon- dary

- Reservoir, pumps and prime movers of hydraulic power unit (HPU) reservoir de- tails and arrangements

- Hydraulic, pneumatic, and electrical schematics

- Details of pressure relief system

(v) FMEA for computer-based systems

(vi)Calculations for control systems demonstrating the system's ability to react ad- equately to anticipated occurrences, including transients

(vii) Arrangements and details of control consoles/panels

(viii) Type and size of all electrical cables and wiring associated with the control sys- tems, including voltage rating, service voltage and currents

(ix) Schematic plans and logic description of hydraulic and pneumatic control systems

together with all interconnections, piping sizes and materials, including working pres- sures and relief-valve settings

(x) Description of all alarm and emergency tripping arrangements

(xi) Description of all special valves, actuators, sensors and relays

(xii) Shutdown logic and shutdown cause and effect charts

(xiii) Hydrocarbon and H2S gas detection system plans and data, including detectors, piping, set points, type of detectors, and location of alarm panels, and recalibration program for gas detectors

(i) Internal and external design pressure, minimum and maximum design temperature

(ii) Material specifications

(iii) Design analysis

(iv) Prototype testing data

(d) Documentation for piping systems including the followings

(i) Piping & instruments diagrams

(ii) Piping specifications including material specifications

(iii) Design parameters such as pressure and temperature

(iv) Pipe stress and flexibility analyses

(e) Documentation for pressure-retaining equipment including the followings

(i) Design specifications including applicable design codes and standards

(ii) Design parameters such as design pressure of internal/external, maximum and mini- mum design temperature, loads, etc.

(iii) Design calculations

(iv) Dimensional drawings and fabrication details

18 Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015

(v) Material specifications

(f) Documentation for mechanical load-bearing equipment including the followings

(i) Design specifications including applicable codes and standards

(ii) Design parameters such as loads, temperature, environmental conditions, etc.

(iii) Design analysis and calculations

(iv) Dimensional drawings and fabrication details

(v) Material specifications

(2) Plans and documents to be submitted for the approval of the Society at classification survey during construction are to comply with (3).

(3) The Society may consider manufacturer's exceptions to parts of specified codes, and standards for drilling equipment with justifications through the followings.

(A) Stress calculations/analysis

(B) Historical performance/experience data

(D) Novel features in accordance with Ch 1, 103. 3

(E) Testing

In this case, the manufacturer must provide details of the exceptions to parts or sections of rec- ognized design standards in the "Design Basis" submittal and clearly stated in detail on the

manufacturer’s declaration of conformity

3. Certification of equipment

(1) The manufactured equipment and components are to be verified for satisfactory compliance with the recognized codes and standards, and the requirements of the Annex.

(2) Equipment and components of drilling portance for safety.

systems are categorized as Table 2.1 according to im-

Table 2.1 Categorization of process equipment

Equipment(3)		Category
Equipment(3)		Category 1(1)	Category 2(2)
Well control systems
Blowout preventer systems	Accumulators	X
	Acoustic control system	X
	Autoshear system	X
	BOP stack	X
	BOP	X
	Clamps	X
	Hydraulic connector	X
	Control system/console/panel	X
	Control pods	X
	Deadman system	X
	Drilling spools	X
	Hydraulic hoses and piping	X
	Hydraulic power unit	X
	MUX cable reels	X
	Spacer spools	X
	Test stump	X
Lower marine riser package	Annular preventer	X
	Emergency disconnect system	X
	Flex/ball joint	X
	Frame	X
	Jumper hoses	X
	Riser adapter	X
	Hydraulic connector	X

Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015 19

Equipment(3)		Category
Equipment(3)		Category 1(1)	Category 2(2)
Diverter systems	Control system/console/panel	X
	Diverter house with annular sealing device	X
	Hydraulic power unit	X
	Piping system	X
	Valves	X
Choke and kill systems	Control system/console/panel	X
	Connectors	X
	Valves	X
	Manifolds	X
	Flexible hose	X
	Piping systems	X
	Kill unit	X
	Hydraulic power unit	X
Auxiliary equipments	Drill pipe safety valves	X
	Drill string float valves	X
	Non-return valve in drill string	X
Marine drilling riser systems
Marine drilling riser	Ball and flexible joints	X
	Riser sections including joints	X
	Riser tensioning unit	X
	Telescopic arms	X
Riser running equipment	Gimbal	X
	Riser running tool	X
	Riser spider	X
Riser tensioning systems	Accumulators	X
	Air/nitrogen buffer tanks	X
	Compressor		X
	Dryers		X
	Control system/console/panel	X
	Hydraulic cylinders	X
	Hydraulic power unit	X
	Nitrogen generator	X
	Piping system	X
	Pressure vessels	X
	Riser tensioners	X
	Guideline and podline tensioners	X
	Riser tensioning unit	X
	Telescopic arms	X
	Sheaves	X
	Wire ropes		X
	Riser recoil	X
Drill string compensating systems
Drill string compensators	Accumulators	X
	Compressor		X
	Dryers		X
	Compensator assembly	X
	Control system/console/panel	X
	Hydraulic cylinders	X
	Piping systems	X
	Pressure vessels	X
	Sheaves	X
	Wire ropes		X

20 Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015

Equipment(3)		Category
Equipment(3)		Category 1(1)	Category 2(2)
Bulk storage, transferring and mud circulating systems
Bulk storage and transferring systems	Bulk storage tanks	X
Bulk storage and transferring systems	Piping for transfer system	X
Mud circulating systems	Degasser	X
	Desander and Desilter		X
	Mud tanks		X
	Mud pumps	X
	Agitator		X
	Trip tanks		X
	Shale shakers		X
	Chemical mixer		X
	Circulating head	X
	Control system/console/panel	X
	Charging pump	X
	Swivel	X
	Kelly	X
	Kelly busing		X
	Kelly cock	X
	Flow control valves	X
	Internal BOP	X
	Mud booster hoses	X
	Mud booster piping	X
	Mud-gas separator	X
	Piping for circulating drilling fluid to the well	X
	Piping for mud return		X
	Pulsation dampeners	X
	Rotary hoses	X
	Safety valves at mud pump	X
	Standpipe manifold	X
Cementing systems	Cement pump	X
	Cementing manifold	X
	Flexible hoses	X
	Cement pump discharge piping	X
	Piping systems for mixing cement and suction to cement pump		X
	Pulsation dampeners	X
	Safety valves	X
Hoisting, lifting rotating and pipe handling systems
Hoisting systems	Derrick and mast	X
	Crown block including support beams	X
	Deadline anchors	X
	Drawworks	X
	Drill line spoolers		X
	Drilling line		X
	Elevators	X
	Links	X
	Power swivel	X
	Rotary swivel	X
	Sheaves for crown block and traveling block	X
	Traveling block including guide track and dolly	X
	Travel block hook	X

Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015 21

Equipment(3)		Category
Equipment(3)		Category 1(1)	Category 2(2)
Lifting systems	Base mounted winches	X
	BOP handling crane	X
	Crane type lifting equipment	X
	Manrider winches	X
	Personnel baskets	X
	Pipe racking mechanism	X
	Padeyes (permanent)	X
Pipe handling systems	Bridge crane	X
	Catwalk ramp	X
	Finger board	X
	Monkey board	X
	Guide track and dolly	X
	Horizontal to vertical equipment	X
Pipe handling systems	Manipulator arms	X
	Mechanical mousehole	X
	Fixed mousehole		X
	stabbing board	X
	Wire rope	X
	Control system/console/panel	X
	Hydraulic power unit	X
	Kelly spinner		X
	Power slips		X
	Iron roughneck/power tongs		X
Rotary systems	Rotary table	X
Well control systems
Well test system	Control system/console/panel	X
	Burner boom	X
	High pressure pumps	X
	Heat exchanger	X
	Piping systems	X
	Pressure vessels	X
	Pumps for hydrocarbon liquid	X
	Safety valves	X
Equipment other than mentioned above
Control systems	Drillers console	X
Control systems	Components of control systems	X
Piping systems	Class I piping systems and Class II piping sys- tems as defined in Pt 5, Ch 5 of Rules for the Classification of Steel Ships	X
Piping systems	Class III piping systems defined in Pt 5, Ch 5 of Rules for the Classification of Steel Ships		X

22 Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015

Equipment(3)		Category
		Category 1(1)	Category 2(2)
Pressure vessels	Class 1 pressure vessels and Class 2 pressure ves- sels as defined in Pt 5, Ch 5 of Rules for the Classification of Steel Ships	X
	Class 3 pressure vessels as defined in Pt 5, Ch 5 of Rules for the Classification of Steel Ships		X
(Note) (1) Category 1 : Equipment for which the Society certificate is required. (2) Category 2 : Equipment for which the manufacturers' certificate is accepted. (3) Equipment includes prime movers

(3) Category 1 equipment is to comply with the followings.

(A) Plans and documents are to be submitted for the approval of the Society before the work is commenced. However, equipments design-approved in accordance with Ch 4 of Guidance for Approval of Manufacturing Process and Type Approval, Etc. are not required drawing approval.

(B) Tests required in (5) are to be carried out at the plant of manufacturer.

(C) Prior to commencement of surveys, the Society is to discuss with the manufacturer at a kick off meeting the items listed as the followings.

(a)

Confirmation of the main point of contacts for the manufacturer and the Society

(b) Review the project quality plans

(c)

Review proposed manufacturing specification

(d) Review project manufacturing and delivery schedules

(e)

(f)

Review and confirm project "hold-points"

Review any proposed sub-contractor lists and qualifications

(g) Confirm specification, drawings and/or documentation associated with the manufacturing process

(D) The attending Surveyor is to perform or verify the followings.

(a)

To confirm that the facilities to manufacture, fabricate or repair drilling system and equipment have and maintain an effective quality control program effectively covering design, procurement, manufacturing and testing, and meeting the requirements of a rec- ognized standard applied to their product

(b) Welder’s qualifications

(c)

Welding procedure specifications and corresponding weld procedure qualification records

(d) To verify material certificates

(e)

(f)

To survey fit-up prior to major weldments To survey final weldments

(g) To witness, as far as deemed necessary, nondestructive examination tests of welds and to review records of nondestructive examinations.

(h) To review records of post-weld heat treatment, in particular for piping subjected to pres-

surized sour service and subject to NACE MR0175/ISO 15156 requirements

(i)

(j)

To verify dimensions are as shown on approved drawings

To check dimensional tolerances and alignment of mating surfaces

(k) To witness prototype testing of drilling equipment or components in accordance with the applicable API requirements.

(l)

To witness pressure and proof-load testing of equipment and unit as specified in the

fabrication procedures.

(m) To witness final testing and functional testing of subassemblies and completed units, as specified in the fabrication procedures.

(n) To verify all purged and pressurized systems, motor controllers, SCR banks, consoles

and instrumentation and control panels are in compliance with approved drawings.

(o) To carry out other inspections as agreed upon during prefabrication meeting

(p) To review and approval final manufacturing Data Book and issue final survey report or certificate and confirm compliance with approved drawings.

Guidance Relating to the Rules for the Classification of Mobile Offshore Drilling Units 2015 23

(E) The materials test report of the following components is to be made available to the attend- ing Surveyor during the manufacturing process. In general, materials associated with equip- ment that require Surveyor’s attendance in accordance with Table 2.1 are to have complete traceability with materials test report

(a)

Materials of pressure-retaining components

(b) All bolts and nuts for fastening

(c)

Materials of primary load-bearing parts.

(d) All piping, valves and fittings with an ANSI B16.5 Class 150 or greater.

(4) For category 2 equipment, manufacturers' certificate containing the following data is to be submitted.

(A) Equipment specification

(B) statement to confirm that their products are designed, manufactured and tested in accordance with the recognized codes and standards, and the requirements of this chapter

(D) Test record

(5) Equipment and components of drilling systems are to be tested following.

(A) Pressure tests

(a) Pressure containing piping and components are to be subject test at 1.5 times the design pressure, if not otherwise specified

in accordance with the

to a hydrostatic pressure in recognized standards.

(b) For piping and component that cannot be hydraulically tested, alternative suitable test

acceptable to the Society method may be applied.

(c)

Well control equipment is to be subjected to the following hydraulic test.

(i) Hydrostatic tests of bodies in accordance with API Spec 16A 7.5.8.6.2

(ii) Hydrostatic tests of hydraulic operating systems in accordance with API Spec 16A 7.5.8.6.3

(iii) Closed preventer tests in accordance with API Spec 16A 7.5.8.7

(iv) Hydraulic connector tests in accordance with API Spec 16A 7.5.8.7.4

(B) Load tests

(a) Lifting appliance and load bearing components are to be subject to a load test.

(b) Load tests for Lifting appliance are to comply with Pt 9, Ch 2, 205. of Rules for the Classification of Steel Ships except that manriding equipment is to comply with the following.

(i) The load test at 2 times SWL is to be carried out.

(ii) Following brake capacity tests are to be carried out.

- Static brake capacity test for all brakes operating simultaneously at 2 times SWL.(I) Base-mounted winches and other lifting appliances

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