Iranian Classification Society Rules

Section 2 Classification

201. Classification

Units built and surveyed for the classification in accordance with this Guidance or in accordance with requirements deemed to be equivalent to this Guidance by the Society will be assigned a class and registered in the Register of Ships.

202.

Class notations

The class will be distinguished by the class notations and the class notations assigned to the unit classed with the Society are to be in accordance with the requirements specified in Pt 1, Ch 1,

201. of Rules for the Classification of Steel Ships. However, the ship type notation and spe-

cial feature notation shall be assigned as followings.

(1) The following ship type notation shall be assigned according to the purpose of unit.

(A) Floating Production, Storage and Offloading Unit

(B) Floating Production and Offloading Unit

(2) The following special feature notations shall be assigned according to the type of unit.

(A) Ship Type

(B) Barge Type

(D) Spar

(E) TLP

When an existing vessel is converted to an unit, and is classed with the Society according to the requirements of this Guidance, the notation (C) shall be assigned as special feature notation. If the

existing vessel being converted is currently classed with the Society with ✠

symbol would be maintained for the converted unit.

3. At the request of the Owner, the special feature notations may be assigned as

symbol, then the ✠

followings.

(1) For units fitted with the production systems,

where the whole production

systems are in com-

pliance with Ch 11, the notation Production

may be assigned additionally. However, for units

fitted with the production

systems, even if

the production systems are not intended to be

classed, the devices related

to the safety of the production systems are to be comply with the

requirements of Ch 8 and Ch 11.

(2) Where the import and/or export systems are in compliance with the requirements of Ch 12, the notation Import and/or Export may be assigned additionally.

(3) For the unit that has a propulsion system and a means of disengaging the unit from its moor- ing and riser systems, the notation Disconnectable may be assigned additionally.

203. Maintenance of classification

1. Units classed with the Society are to be subjected to the surveys to maintain the classification and

are to be maintained in good condition in accordance with the requirements specified

Chapter.

2. Plans and particulars of any proposed alterations to the approved scantlings or arrangements

in this

of hull,

Guidance for Floating Production Units 2015 3

Ch 2 Classification and Surveys Ch 2

machinery or equipment are to be submitted for approval by the Society before the work is com- menced and such alterations are to be surveyed by the Surveyor of the Society.

204. Classification Survey during Construction

1. General

At the Classification Survey during Construction, the hull, machinery and equipment are to be ex- amined in detail in order to ascertain that they meet the relevant requirements of this Guidance.

2. Submission of plans and documents

(1) At the Classification Survey during Construction, the following plans and documents are to be submitted to the Society for approval before the work is commenced.

(A) Hull and hull equipments

(a)

Transverse section showing scantlings

(b) Longitudinal section showing scantlings

(c)

Deck construction plan(including details of well and helicopter deck)

(d) Framing

(e)

(f)

Shell expansion Final stability data

(g) Methods and locations for non-destructive testing

(h) Construction plan of watertight bulkheads and deep tanks indicating the highest position

of tank and positions of tops of overflow pipes

(i)

(j)

Construction of superstructures and deckhouses

Details of arrangement and closing devices of watertight doors and hatchways, etc.

(k) Seatings of boilers, main engines, thrust blocks, plummer blocks, dynamos and other im- portant auxiliary machinery

(l)

Construction of machinery casings

(m) Construction of cargo handling appliances and its foundation

(n) Pumping arrangements

(o) Steering gear

(p) Construction of fire protection

(q) Means of escape

(r)

(s)

(t)

Temporary mooring arrangements and towing arrangements Welding details and procedures

Details of corrosion control arrangements

(u) Documents in respect of maintenance, corrosion control and inspection

(v) Other plans and/or documents considered necessary by the Society

(B) Machinery

(a) Plans and data relevant to machinery installation specified in Pt 5, Ch 1, Sec 2 of

Rules for the Classification of Steel Ships.

(b) Electrical installations specified in Pt 6, Ch 1 of Rules for the Classification of Steel Ships, and automatic and remote control system specified in Pt 6, Ch 2 of Rules for the Classification of Steel Ships.

(c)

Fire extinguishing arrangements and inert gas system

(d) Other plans and/or documents considered necessary by the Society

For the unit with notation Production, submission of plans and documents for the pro- duction system is to in accordance with Ch 11.

(D) Import and Export systems

For the unit with notation Import and/or Export, submission of plans and documents for the import and export system is to in accordance with Ch 12.

(2) At the Classification Survey during Construction, the following plans and documents are to be submitted to the Society for reference.

(A) Specifications

(B) General arrangement

(D) Plan indicating design loadings for all decks

(E) Preliminary stability data

4 Guidance for Floating Production Units 2015

Ch 2 Classification and Surveys Ch 2

(F) Structural analysis and calculation for relevant loading conditions

(G) Resultant forces and moments from wind, waves, current, mooring and other environmental loadings taken into account in the structural analysis

(H) Calculations for significant operational loads from derrick and other equipment

(I) Lines or offsets

(J) Capacity plans and sounding tables of tanks

(K) Plans showing arrangement of watertight compartments, openings, their closing appliances, etc., necessary for calculation of stability

(L) Other plans and/or documents considered necessary by the Society

Submitted calculations are to be suitably referenced. Results from relevant model tests or dynamic response calculations may be submitted as alternatives or as substantiation for the required calculations.

3. Presence of Surveyor

(1) At the Classification Survey during Construction, the presence of the Surveyor is required at the following stages of the work in relation to hull and equipment.

(A) When the tests of the materials specified in Pt 2, Ch 1 of Rules for the Classification

of Steel Ships and the equipment specified in Pt 4 of Rules for the Classification of Steel Ships are carried out.

(B) When the tests of welding specified in Pt 2, Ch 2 of Rules for the Classification of

Steel Ships are carried out.

(D) When each block is assembled and erected.

(E) When each part of the hull is completed.

(F) When structural tests, leak test, hose tests and non-destructive tests are carried out.

(G) When

performance tests are carried out on closing appliances of openings, anchoring and

mooring equipment, cargo handling appliances, fire detection systems, etc.

(H) When each part of the fire protection construction is completed.

(I) When measurement of principal dimensions, hull deflection, etc. are carried out.

(J) When a loading instrument is installed on board.

(K) When the load line mark is marked.

(L) When the onboard tests and stability experiments are carried out.

(M) When deemed necessary by the Society.

(2) At the Classification Survey during Construction, the presence of the Surveyor is required at the following stages of the work in relation to machinery.

(A) When the tests of materials of main parts of machinery specified in Pt 2 of Rules for the

Classification of Steel Ships are carried

(B) Main parts of machinery

(a) When the tests specified in either Pt

out.

5 or Pt 6 of Rules for the Classification of

Steel Ships according to the kind of machinery are carried out.

(b) When the materials are assembled sembled for installation on board.

for construction of the parts and the parts are as-

(d) In case of welded construction, before welding is commenced and when it is completed.

(e) When the shop trials are carried out.

(D) When performance tests/onboard tests are carried out on measurement instruments, remote control devices of closing appliances, remote control devices for machinery and gears, auto- matic control devices, steering gear, mooring equipment, fire extinguishing equipments, pip- ing, etc.

(E) When deemed necessary by the Society.

4. Tests

(1) At the Classification Survey during Construction, hydrostatic tests, leak tests, hose tests and per- formance tests, etc are to be carried out in accordance with the relevant requirements of this Guidance.

(2) In the case of machinery and electrical

installations related to production systems and the pipes

and hoses installed on units during off loading, hydrostatic tests, leak tests or airtight tests are

to be carried out as specified in this

Guidance corresponding to the kind of machinery and

Guidance for Floating Production Units 2015 5

Ch 2 Classification and Surveys Ch 2

electrical installations.

(3) In case where production systems or positioning systems, etc. are installed on board units at works different from the shipbuilding yards where hull structures are constructed (including the sea areas of the site of operation), surveys necessary in order to tow the hull structures of units

to their site of operation are to be carried out. In this cases, the tests,

spections for the support structures of installations are to be carried out at sions before the final inspection at the site of operation.

(4) Equipments which cannot be surveyed at the Classification Survey during special reasons that are related to such equipment only being capable

examinations or in- suitable places/occa-

Construction due to of functioning after

start-up and commissioning are to be identified for verification at the next Annual Survey.

5. Survey for storage facilities

In case of the equipment found in storage facilities(piping systems for crude oil, crude oil pumps, venting systems, inert gas systems, etc.), tests and surveys are to be carried out in accordance with the requirements for the cargo oil systems of tankers specified in Pt 5 and Pt 7, Ch 1 of Rules for the Classification of Steel Ships as applicable.

6. Survey for production systems(if relevant notations are assigned)

Survey for production systems is to be in accordance with the requirements specified in Ch 11.

7. Survey for import and export systems(if relevant notations are assigned)

Survey for import and export systems is to be in accordance with the requirements specified in Ch 12.

8. Survey during the installation of units at their site of operation

(1) During the installation of positioning systems, the following items are to be verified and sur- veyed by the Surveyor.

(A) The components of positioning systems installation.

(B) Certificates are to be confirmed for those

manufacturer facilities.

are to be examined for abnormalities before

components which are required to be tested at is to be examined and reported on by divers or

remotely operated vehicles(ROVs) before installation to ensure that there is no obstruction.

(D) During the installation of units to their seabed mooring points, the following is to be verified.

(a) Proper locking of all connecting shackles from mooring lines to seabed mooring points,

and from mooring lines to mooring lines

(b) Sealing of all kenter shackle locking pins

(d) Whether seabed mooring points are installed in their designed position and are orientated within allowable design tolerance.

(E) Mooring lines are to be confirmed to be paid out as designed and in accordance with pre- determined procedures.

(F) After mooring systems are deployed at their site of operation, the following tests are re-

quired for each mooring line.

(a) During tests, each mooring line is to be pulled to its maximum design load determined by dynamic analysis for the intact design condition and held at that load for 30 minutes. The integrity of the entire mooring line from the seabed mooring point to the connecting end at the hull structure of the unit as well as movement of the seabed mooring point is to be verified.

(b) Notwithstanding (a) above, the test load for soft clay may be modified as deemed ap- propriate by the Society. Even in such cased, however, test loads cannot be reduced less than 80% of the maximum intact design loads.

(c) Notwithstanding (a) and (b) above, the tensioning tests of mooring lines may be waived in cases where detailed investigation reports are submitted to the Society and deemed appropriate. In such cases, however, preloading each seabed mooring point in required. The load of this preloading is not to be less than the mean intact design tension, and such that the integrity and proper alignment of mooring lines can be verified.

(G) Mooring lines are to be verified for firm and adequate connections to chain stoppers.

(H) It is to be verified that the relative position of the single point mooring center of single

6 Guidance for Floating Production Units 2015

Ch 2 Classification and Surveys Ch 2

point mooring systems to pipe line end manifolds(PLEMs) is in compliance with design specifications and tolerances.

(I) Catenary angles of mooring lines are to be measured and verified for compliance with de-

sign specifications and tolerances.

(J) During installation, it is to be verified that the risers and other supporting facilities of units are not deformed or damaged, buoyancy tanks, etc. are in their correct position, and flow lines are firmly and adequately connected.

(K) Upon completion of installation, the connection of units to their periphery facilities is to be verified for compliance with design specifications. Divers or ROVs are to be arranged as necessary for the survey of any underwater parts deemed necessary by the Surveyors.

9. Onboard tests and stability experiments

(1) During the onboard tests of units, the following items are to be verified and surveyed by the Surveyor. The results of onboard tests are to be submitted to the Society.

(A) Performance tests of positioning systems(performance tests of windlass, etc.)

(B) Performance tests of such systems that are necessary for adjusting the draught, inclination, etc. of units, like ballasting systems

malities in the condition of units are found)

(D) The accumulation tests of boilers

(E) Confirmation of safety systems(fire/gas detection systems, fire extinguishing system, emer- gency shutdown systems)

(F) Function test of communication systems

(G) Emergency procedures against oil spill, fires, etc.

(H) Confirmation of fire extinguishing system

(a) Fire pumps

(b) Fixed fire-extinguishing systems

(I) Function tests of detection and alarm systems

(a) Fire detection systems

(b) Gas detection systems

(d) Emergency shutdown systems

(J) Confirmation that all systems of the unit are functioning normally

(K) Confirmation of production systems(controlling system, emergency shutdown, etc.)

(L) Confirmation of purging capability

(M) Confirmation of flare systems

However, if the items specified above are verified by simulating installed conditions at ship- building yards, such onboard tests may be dispensed with.

(2) Stability experiments are to be carried out at suitable occasions after the completion of the main structures of units and before proceeding to the site of operation. A stability information

booklet prepared on the basis of the stability particulars determined by the results of stability experiments is to be approved by the Society and provided on board.

205. Classification Survey after Construction

1. General

At the Classification Survey after Construction, the examination of the hull, machinery and equip- ment are carried out as required for the Special Survey corresponding to the age, kind and purpose of the unit and the actual scantlings, etc. of the main parts of the unit are to be measured as necessary.

2. Submission of plans and documents

At the Classification Survey after Construction, plans and documents as may be required for the Classification Survey during Construction are to be submitted. If plans and documents cannot be obtained, facilities are to be given for the Surveyor to take the necessary information from the unit.

3. Onboard tests and stability experiments

At the Classification Survey after Construction, onboard tests and carried out in accordance with the requirements specified in 204.

stability experiments are to be

9. However, onboard tests and

Guidance for Floating Production Units 2015 7

Ch 2 Classification and Surveys Ch 2

stability experiments may be dispensed with provided that sufficient information based on previous tests is available and neither alteration nor repair affecting onboard tests and stability experiments has been made after such previous tests.

< Previous | Contents | Next >