BV NR 534: 自升式平台（Jack-ups & Liftboats）分类规则

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"BV NR 534 规则涵盖了自升式装置，如杰克船和浮吊船的分类标准，由法国船级社(Bureau Veritas, 简称BV)发布，该文件发布于2016年12月。" 【船级社】 BV NR 534 规则是关于自升式单位分类的一份重要文件，旨在为自升式装置，如杰克船（jack-ups）和浮吊船（liftboats）的建造、维护和运营提供一套全面的安全和质量标准。这份规则由法国船级社制定，该机构是一个致力于船舶及海上设施分类的社会组织，其目标是确保各种类型的海洋和陆上结构、设备及其系统的安全性与可靠性。该规则包括一系列的技术规范和指导原则，适用于各类海洋环境中的自升式装置，不论它们是连接到岸上、河床或海底，还是在海上或内陆水域运营，甚至部分位于陆地上。这些装置可能涉及潜艇、气垫船、钻井平台、各种用途的海上设施，以及相关的辅助设备，如海底井口、管道、锚腿和系泊点等。规则的主要内容可能涉及以下几个方面： 1. 设计与建造：规定了自升式装置的设计要求，包括结构强度、稳定性、疲劳评估、材料选择等，确保其在各种操作条件下的安全性能。 2. 机械与电气系统：涵盖动力系统、提升设备、推进器、电力供应和控制系统，强调可靠性和效率，同时考虑了极端环境下的操作能力。 3. 自升系统：详细规定了自升式装置的升降机制，包括桩腿的设计、检验、操作和维护，以防止在升高和降下过程中发生事故。 4. 安全与环保：关注人员安全、应急响应计划、污染预防措施，以及符合国际海事组织（IMO）和其他相关法规的要求。 5. 检验与认证：定义了BV对自升式装置进行定期检查和认证的过程，以确保持续符合规则要求。 6. 变更管理：规定了在装置生命周期内进行修改或升级时必须遵循的程序，确保变更不会降低原有的安全标准。 7. 运行与维护：提供了运行期间的指导，包括日常维护、保养计划和故障处理，以保持装置的最佳状态。通过这些规则，法国船级社旨在促进海上作业的安全性、效率和可持续性，同时为相关行业提供一个统一的评估框架，便于全球范围内理解和执行。对于船东、运营商、设计师、制造商以及监管机构而言，理解和遵守BV NR 534 规则至关重要，因为它们是保证自升式装置安全、高效和合规运营的基础。

NR 534, Sec 1

December 2016 Bureau Veritas 11

2.5.2 Unit services

The Design Criteria Statement is to list the main services for

which the unit is designed, as well as the service notation

and other notations assigned to the unit.

The nature of the unit activity is to be duly accounted for in

the application of the Offshore Rules (see [4.1.1]), as far as

classification is concerned.

2.5.3 Structural design criteria

The Design Criteria Statement is to list the necessary data

pertaining to the structural design of the unit for its different

conditions of operation, according to the provisions of

Part B, Chapter 2 of the Offshore Rules (see [4.1.1]).

2.5.4 Machinery, electrical and other system design

conditions

The Party applying for classification is to submit the neces-

sary description, diagrammatic plans and design data of all

the systems, including those used solely for the service

(drilling, lifting, etc.) performed by the unit and, where

applicable, their cross connections with the other systems.

The submitted data are to incorporate all information neces-

sary to the assessment of the unit for the purpose of the

assignment of class or for the assignment of additional class

notations.

In accordance with Pt A, Ch 1, Sec 1, [4.8.1] of the Off-

shore Rules (see [4.1.1]), the Party applying for classifica-

tion is to give an electric balance estimation for the different

conditions of operation of the unit. The specifications are to

list all the important equipment and apparatus, their rating

and the power factors, as applicable.

2.6 Design life

2.6.1 The requirements about design life, unit modification

and unit re-assessment are given in Pt A, Ch 1, Sec 1, [1.7]

of the Offshore Rules (see [4.1.1]).

2.7 Operating Manual

2.7.1 An Operating Manual, including instructions regard-

ing the safe operation of the unit and of the systems and

equipment fitted on the unit, is to be placed on board the

unit.

The Operating Manual is to be, at all times, made available

to all concerned. A copy of the Operating Manual is to be

retained ashore by the Owner of the unit or by his repre-

sentatives.

The Operating Manual is to incorporate a dedicated section

containing all the information relating to classification, par-

ticularly the environmental, loading and other design crite-

ria, as well as the classification restrictions. The Operating

Manual of a self-elevating unit is also to stipulate the

instructions related to the transit conditions, the preloading

and the emergency procedures in case of punch through.

It is the responsibility of the Party applying for classification

to prepare the contents of the Operating Manual.

2.7.2 The Operating Manual is to be submitted to the Soci-

ety for review, this review being limited to check that the

classification related material as mentioned above is con-

sistent with the data given in the Design Criteria Statement

defined in [2.5].

The minimum requirements about the content in the Oper-

ating Manual are given in [5.1.3].

3 Statutory requirements

3.1 General

3.1.1 The classification of a unit does not relieve Owners,

Designers, Builders and other Interested Parties from com-

pliance with any requirements issued by the administration

(international conventions, national laws and regulations,

and other instruments).

3.1.2 When authorized by the administration concerned,

the Society is to act on its behalf within the limits of such

authorization. In this respect, the Society is to take into

account the relevant national requirements, survey the unit,

report and issue or contribute to the issue of the corre-

sponding certificates (see Pt A, Ch 1, Sec 1, [3.1.3] of the

Offshore Rules).

3.2 Project specification

3.2.1 Prior to the design of the unit, a complete list of the

Rules, Codes and statutory requirements to be complied

with is to be established and submitted, detailing the:

• International conventions

• Flag State requirements

• Coastal State requirements

• Owner standards and procedures

• Industry standards.

3.2.2 The project specification is also to specify the list of

the Owner requested certificates.

3.3 Conflict of Rules

3.3.1 In case of conflict between the present Rule Note and

any statutory requirement as given by the Flag State or the

Coastal State, the latter ones are to take precedence over

the requirement of the present Rule Note.

3.3.2 In case of conflict between the Owner or industry

standards and the present Rule Note, the latter one is nor-

mally to take precedence.

4 Definitions

4.1 Referenced documents

4.1.1 Offshore Rules

When reference is made to the Offshore Rules, the latest

version of NR445 “Rules for the Classification of Offshore

Units” is applicable.

NR 534, Sec 1

December 2016 Bureau Veritas 13

c) Transit mode

The unit moves from one location to another within the

appropriate design limits established for such opera-

tions.

The transit mode includes short-duration field moves

between locations in close proximity and ocean transit

for which a specific preparation of the unit is generally

needed.

The unit may be self-floating or supported by a transpor-

tation unit during the ocean tow.

d) Installation mode

Period when the unit is firstly lowering legs to the sea

bed, secondly elevating hull at the required elevation

above the sea level, and then preloading the legs to the

extreme loading.

e) Retrieval mode

Period when the unit is lowering the hull and then ele-

vating legs to be ready for transit mode.

4.4 Water levels, crest elevation and water

depth

4.4.1 The reference water levels and crest elevation are

defined as follows in the present Rule Note (see Fig 1):

• mean water level (MWL): mean level between the high-

est astronomical tide (HAT) and the lowest astronomical

tide (LAT)

• astronomical tidal range: range between the highest

astronomical tide (HAT) and the lowest astronomical

tide (LAT)

• maximum still water level (SWL): level at the highest

astronomical tide (HAT) including storm surge

• crest elevation: height of wave crest above the SWL.

4.4.2 Except otherwise specified, the reference water depth

to be considered is the distance between the sea bed and

the SWL.

4.5 Configuration of a self-elevating unit in

elevated position

4.5.1 The configuration of a self-elevating unit in elevated

position is to be defined based on the site data associated

with the unit service(s) (such as geotechnical drilling, pro-

duction, workover, assistance, lifting, accommodation).

4.5.2 The configuration is defined with the following

parameters (see Fig 1):

a) Leg penetration length

The leg penetration length is the maximum leg penetra-

tion into the sea bed, including the spudcan if any.

b) Leg length reserve

The leg length reserve is the reserve above the upper

guide to avoid any soil settlement or punch through and

to provide a contingency in case the penetration

exceeds the predicted one.

c) Air gap

The air gap is defined as the distance between the

underside of the hull and the LAT.

d) Wave crest clearance

The wave crest clearance is defined as the distance

between the highest wave crest and the underside of the

hull.

4.6 Configuration of a self-elevating unit in

floating position

4.6.1 In floating position, the legs are usually elevated and

supported by the hull.

The draught of the unit is defined as the distance from the

lowest point of the hull to the waterline.

5 Documents to be submitted

5.1 General

5.1.1 The required documentation is listed in Part A, Chap-

ter 1 of the Offshore Rules.

5.1.2 The required documentation is to clearly show all the

essential features, arrangements and scantlings of the struc-

ture, machinery, boilers, auxiliaries and other equipment

covered by the classification.

5.1.3

In addition to

[5.1.1]

, the documentation is to include

the information listed in

[5.2]

for plan review purposes.

5.2 Additional information for plan review

purposes

5.2.1 Design criteria and data

The design criteria and data, as stipulated in Sec 3, include

environmental data (see Sec 4).

The data are to be as comprehensive as possible and to

clearly give evidence of all the applicable environmental

restrictions:

• maximum loading for all deck areas

• results of model basin tests, when performed

• results of wind tunnel tests, when performed

• for equipment liable to induce, when in use, significant

loads within the structure of the unit, all information on

these loads, such as:

- drilling loads

- crane loads on pedestal and on boom and hook rests

(lifting)

- other loads from lifting and handling equipment.

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