NR 480

APPROVAL of the MANUFACTURING PROCESS of METALLIC MATERIALSRule NoteNR 480 DTM R00 EMay 200217 bis, Place des Reflets – La Défense 2 – 92400 CourbevoiePostal Address : 92077 Paris La Défense CedexMARINE DIVISION GENERAL CONDITIONSBV Mod. Ad. ME 545 h - 06/2000ARTICLE 11.1. - BUREAU VERITAS is a Society the purpose of whose Marine Division (the “Society”) is the classification (« Classification ») of any ship or ve ssel or structure of any type or part of it or system therein collectively hereinafter referred to as a “Unit” whether linked to shore, river bed or sea bed or not, whether operated or located at sea or in inland waters or partly on land, including submarines, hovercrafts, drilling rigs, offshore installations of any type and of any purpose, their related and ancillary equipment, subsea or not, such as well head and pipelines, mooring legs and mooring points or otherwise as decided by the Society.The Society:• prepares and publishes Rules for classification, Guidance Notes and otherdocuments (« Rules »);• issues Certificates, Attestations and Reports following its interventions(« Certificates »);• publishes Registers.1.2. - The Society also participates in the application of National and International Regulations or Standards, in particular by delegation from different Governments. Those activities are hereafter collectively referred to as « Certification ».1.3. - The Society can also provide services related to Classification and Certification such as ship and company safety management certification; training activities; all activities and duties incidental thereto such as documentation on any supporting means,software, instrumentation, measurements, tests and trials on board.1.4. - The interventions mentioned in 1.1., 1.2. and 1.3. are referred to as « Services ».The party and/or its representative requesting the services is hereinafter referred to as the « Client ».The Services are prepared and carried out on the assumption that the Clients are aware of the International Maritime and/or Offshore Industry (the “Industry”)practices.1.5. - The Society is neither and may not be considered as an Underwriter, Broker in ship’s sale or chartering, Expert in Unit’s valuation, Consulting Engineer, Controller, Naval Architect, Manufacturer, Shipbuilder, Repair yard, Charterer or Shipowner who are not relieved of any of their expressed or implied obligations by the interventions of the Society.ARTICLE 22.1. - Classification is the appraisement given by the Society for its Client, at a certain date, following surveys by its Surveyors along the lines specified in Articles 3 and 4hereafter on the level of compliance of a Unit to its Rules or part of them. This appraisement is represented by a class entered on the Certificates and periodically transcribed in the Society’s Register.2.2. - Certification is carried out by the Society along the same lines as set out in Articles 3 and 4 hereafter and with reference to the applicable National and International Regulations or Standards.2.3. - It is incumbent upon the Client to maintain the condition of the Unit after surveys, to present the Unit for surveys and to inform the Society without delay of circumstances which may affect the given appraisement or cause to modify its scope.2.4. - The Client is to give to the Society all access and information necessary for the performance of the requested Services.ARTICLE 33.1. - The Rules, procedures and instructions of the Society take into a ccount at the date of their preparation the state of currently available and proven technical knowledge of the Industry. They are not a code of construction neither a guide for maintenance or a safety handbook.Committees consisting of personalities from the Industry contribute to the development of those documents.3.2. - The Society only is qualified to apply its Rules and to interpret them. Any reference to them is void unless it involves the Society’s intervention.3.3. - The Services of the Society are carried out by professional Surveyors according to the Code of Ethics of the Members of the International Association of Classification Societies (IACS).3.4. - The operations of the Society in providing its Services make use of random inspections and are absolutely exclusive of any monitoring and thorough verification.ARTICLE 44.1. - The Society, acting by reference to its Rules:• reviews the construction arrangements of the Units as shown on the documentspresented by the Client;• conducts surveys at the place of their construction;• classes Units and enters their name in its Register;• surveys periodically the Units in service to note that the requirements for themaintenance of class are met.The Client is to inform the Society without delay of circumstances which may cause the date or the extent of the surveys to be changed.ARTICLE 55.1. - The Society acts as a provider of services. This cannot be construed as an obligation bearing on the Society to obtain a result or in a warranty.5.2. - The certificates issued by the Society pursuant to 5.1. here above are a statement on the level of compliance of the Unit to its Rules or to the documents of reference for the Services provided for.In particular, the Society does not engage in any work relating to the design,building, production or repair checks, neither in the operation of the Units or in their trade, neither in any advisory services, and cannot be held liable on those accounts.Its certificates cannot be construed as an implied or express warranty of safety,fitness for the purpose, seaworth iness of the Unit or of its value for sale, insurance or chartering.5.3. - The Society does not declare the acceptance or commissioning of a Unit, that being the exclusive responsibility of its owner.5.4. - The Services of the Society cannot create any obligation bearing on the Society or constitute any warranty of proper operation, beyond any representation set forth in the Rules, of any Unit, equipment or machinery, computer software of any sort or other comparable concepts that has been subject to any survey by the Society.ARTICLE 66.1. - The Society accepts no responsibility for the use of information related to its Services which was not provided for the purpose by the Society or with its assistance.6.2. - If the Services of the Society cause to the Client a damage which is proved to be the direct and reasonably foreseeable consequence of an error or omission of the Society, its liability towards the Client is limited to ten times the amount of fee paid for the Service having caused the damage. This limit is subject to a minimum of fifty thousand (50.000) French francs, and to a maximum which is the greater of five millions (5.000.000) French francs and one and a half times the above mentioned fee.The Society bears no liability for indirect or consequential loss such as e.g. loss of revenue, loss of profit, loss of production, loss relative to other contracts and indemnities for termination of other agreements.6.3. - All claims are to be presented to the Society in writing and on pain of debarment by right, within three months of the date the Services were supplied or of the date the events which are taken advantage of were first known.ARTICLE 77.1. - Requests for Services are to be in writing.7.2. - Either the Client or the Society can terminate as of right the requested Services by prior written notice according to paragraph 7.3., for convenience, and without prejudice to the provisions in Article 8 hereunder.7.3. - The notice due by the Society to the Client to exercise the possibility under 7.2.is of three calendar months and conversely, of ten banking days.7.4. - The class granted to the concerned Units and the previously issued certificates remain valid until the date of effect of the notice issued according to 7.2. hereabove subject to compliance with 2.3. hereabove and Article 8 hereunder.ARTICLE 88.1. - The Services of the Society, whether completed or not, involve the payment of fee upon receipt of the invoice and the reimbursement of the expenses incurred.8.2. - The class of a Unit may be suspended in the event of non-payment of fee after a first unfruitful notification to pay.ARTICLE 99.1. - The documents and data provided to or prepared by the Society for its Services, and the information available to the Society, are treated as confidential. However:• Clients have access to the data they have provided to the Society and to the reportsand certificates which have been prepared for them;• copy of the documents made available for the classification of the Unit can behanded over to another Classification Society Member of the International Association of Classification Societies (IACS) in case of the Unit’s transfer of class;• the data relative to the evolution of the Register, to the class suspension and to thesurvey status of the Units are passed on to IACS according to the association working rules;• technical records and history related to specific class notations may be transferred tothe new owner in case of change of ownership;• the certificates, documents and information relative to the Units classed with theSociety are passed on upon order of the flag authorities of the Unit or of a Court having jurisdiction.The documents and data are subject to a file management plan.ARTICLE 1010.1. - Any delay or shortcoming in the performance of its Services by the Society arising from an event not reasonably foreseeable by or beyond the control of the Society shall be deemed not to be a breach of contract.ARTICLE 1111.1. - The Society may designate another Surveyor at the request of the Client in case of diverging opinions during surveys.11.2. - Disagreements of a technical nature between the Client and the Society can be submitted by the Society to the advice of its Classification Committee.ARTICLE 1212.1. - Disputes over the Services carried out by delegation of Governments are assessed within the framework of the applicable agreements with the States, international Conventions and national rules.12.2. - Disputes arising out of the payment of the Society’s invoices by the Client are submitted to the Court of Nanterre, France.12.3. - Other disputes over the present General Conditions or over the Services of the Society are exclusively submitted to arbitration in London according to the London arbitration procedural rules in force. English law applies.ARTICLE 1313.1. - These General Conditions constitute the sole contractual obligations binding together the Society and the Client, to the exclusion of all other representation,statements, terms, conditions whether express or implied. They may be varied in writing by mutual agreement.13.2. - The invalidity of one or more stipulations of the present General Conditions does not affect the validity of the remaining provisions.13.3. - The definitions herein take precedence over any definitions serving the same purpose which may appear in other documents issued by the Society.May2002R ULE N OTE NR480Approval of the Manufacturing Process of Metallic MaterialsS ECTION1G ENERALS ECTION2R OLLED S TEEL P RODUCTSS ECTION3S EAMLESS P IPES AND F ITTINGSS ECTION4W ELDED P IPES AND F ITTINGSS ECTION5S TEEL F ORGINGSS ECTION6S TEEL C ASTINGSS ECTION7W ROUGHT A LUMINIUM A LLOY P RODUCTSS ECTION8E XPLOSION B ONDED A LUMINIUM/S TEEL T RANSITION J OINTS S ECTION9A NCHOR C HAIN C ABLES AND A CCESSORIES FOR S HIPSNR480Approval of the Manufacturing Process of Metallic MaterialsSection1General1General71.1 Scopeapproval1.2 Requestfor1.3 Preliminary information to be submitted1.4 Approval test program1.5 Certificationapprovalof1.6 Renewal1.7 Reconsideration of the approval1.8 Responsibilities of the manufacturerSection2Rolled Steel Products1General91.1 Scope1.2 Specific information to be submitted1.3 Documents to be submitted for changing the approval conditionssurvey1.4 Approval1.5 Position of the test samples1.6 Test specimens and testing proceduretests1.7 Other1.8 Results2Rolled products made of normal and higher strength steel for hull and otherstructural applications112.1 Scope2.2 Selection of the test product2.3 Extent of the approval tests2.4 Tests on base materialtests2.5 Weldability3Rolled products made of extra high strength steels133.1 Scope3.2 Selection of the test product3.3 Extent of the approval tests3.4 Tests on base materialtests3.5 Weldability4Rolled products for boilers and pressure vessels144.1 Scope4.2 Selection of the test product4.3 Extent of the approval tests4.4 Tests on base material4.5 Weldabilitytests2Bureau Veritas May20025Rolled products made of ferritic steels for low temperature applications165.1 Scope5.2 Selection of the test product5.3 Extent of the approval tests5.4 Tests on base materialtests5.5 Weldability6Rolled products made of stainless steel186.1 Scope6.2 Specific information to be submitted6.3 Selection of the test product6.4 Extent of the approval tests6.5 Tests on base material for austenitic grades (304L, 316L, 316LN, 317L, 317LN)6.6 Tests for austenitic-ferritic grades7Round bars for anchor chain cables207.1 Scope7.2 Selection of the test product7.3 Extent of the approval tests7.4 Tests on base material8Clad steel plates218.1 Scope8.2 Specific information to be submitted8.3 Selection of the test product8.4 Extent of the approval tests8.5 Tests on clad plate9Plates with specified through thickness properties219.1 Scope9.2 Specific information to be submitted9.3 Selection of the test product9.4 Extent of the approval tests9.5 Tests on base materialSection3Seamless Pipes and Fittings1Seamless pipes and fittings231.1 Scope1.2 Specific information to be submitted1.3 Documents to be submitted for changing the approval conditionssurvey1.4 Approval1.5 Position of the test samples1.6 Test specimens and testing procedure1.7 Selection of the test product1.8 Extent of the approval teststests1.9 ApprovalSection4Welded Pipes and Fittings1Welded pipes and fittings251.1 Scope1.2 Specific information to be submittedMay2002Bureau Veritas31.3 Documents to be submitted for changing the approval conditionssurvey1.4 Approval1.5 Position of the test samples1.6 Test specimens and testing procedure1.7 Selection of the test product1.8 Extent of the approval teststests1.9 ApprovalSection5Steel Forgings1Steel forgings271.1 Scope1.2 Specific information to be submitted for approval1.3 Approval test programSection6Steel Castings1Steel castings281.1 Scope1.2 Specific information to be submitted for approval1.3 Approval test programSection7Wrought Aluminium Alloy Products1Wrought aluminium alloy products291.1 Scope1.2 Specific information to be submitted1.3 Documents to be submitted for changing the approval conditionssurvey1.4 Approval1.5 Position of the test samples1.6 Test specimens and testing procedure1.7 Selection of the test product1.8 Extent of the approval tests1.9 Tests on base material1.10 Weldability testsSection8Explosion Bonded Aluminium/Steel Transition Joints1Explosion bonded aluminium/steel transition joints311.1 Scope1.2 Specific information to be submitted1.3 Documents to be submitted for changing the approval conditionssurvey1.4 Approval1.5 Selection of the test product1.6 Extent of the approval tests1.7 Approvalteststests1.8 Other4Bureau Veritas May2002Section9Anchor Chain Cables and Accessories for Ships1Anchor chain cables and accessories for ships331.1 Scope1.2 Specific information to be submitted1.3 Documents to be submitted for changing the approval conditionssurvey1.4 Approval1.5 Selection of the test product1.6 Extent of the approval tests1.7 Approval tests and documentationMay2002Bureau Veritas56Bureau Veritas May2002NR 480,Sec 1May 2002Bureau Veritas7SECTION 1G ENERALSymbolsA%:ElongationAISI :American Iron and Steel InstituteAr3:Temperature at which ferrite phase starts during coolingASSET test:Visual Assessment of Exfoliation Corrosion Sus-ceptibility of 5xxx Series Aluminium Alloys ASTM :American Society for Testing and Materials C EQ :Carbon equivalent CR :Controlled RollingCTOD :Crack Tip Opening Displacement CTS :Controlled Thermal Severity HAZ :Heat Affected Zone HV :Hardness VickersIIW :International Institute of Welding ISO :International Standard Organisation KV :Charpy V energy NAMLT :Nitric Acid Mass Loss TestNDT :Nil Ductility Temperature Pcm :Parameter of crack measurement R eH :Yield stress R m :Tensile strengthTM :Thermo-mechanical Rolling UNS:Unified Numbering System.1General1.1Scope1.1.1This document gives the procedure to be followed to obtain the Society’s approval for the manufacture of metallic prod-ucts in accordance with Rule Note NR471: Rules for the Classification of Steel Ships - Part D - Materials and Welding.Procedures for products and/or grades not explicitely included are subject to special examination by the Society.1.2Request for approval1.2.1The request for approval is to be submitted to the Society using the form available in Annex 1. In addition to the pre-liminary information mentioned in [1.3] as applicable, spe-cific information related to the products is to be submitted together with the request for approval.1.3Preliminary information to be submitted1.3.1Preliminary information to be submitted is to include:a)Name and site address of the manufacturer, location ofthe workshops, general indications relevant to the back-ground, dimensions of the works, total annual produc-tion of finished products for marine applications and others as deemed useful.b)Organization and quality•Organizational chart;•Total number of staff;•Organization of the quality control department;•Certification of compliance of the quality systemwith ISO 9001 or equivalent, if any;c)Manufacturing facilities•Flow chart of manufacturing process;•Manufacturing equipments and capacities;•Origin of raw materials;•Storage of raw materials and finished products;•Equipment for systematic control during manufac-turing;d)Details of inspections and quality control facilities•How are materials and components identified at thevarious manufacturing stages;•Equipment for chemical analysis, metallography,mechanical tests and relevant calibration proce-dures;•Equipment for non-destructive examinations;•List of quality control procedurese)Approval(s) already granted by other Classification Soci-eties and relevant approval test reports as deemed use-ful;1.4Approval test program1.4.1Unless otherwise agreed, the manufacturer shall sub-mit for review an approval test program.Typical approval programs for the various products are given in the relevant articles.The approval tests are in general to be witnessed by the Society’s surveyor at the manufacturer’s works. If the testing facilities are not available at the manufacturer’s works, the tests are to be carried out by recognised laboratories and witnessed by the Society’s surveyor.NR 480,Sec 18Bureau Veritas May 20021.5Certification 1.5.1Approval certificateUpon satisfactory completion of the survey, an approval certificate will be issued by the Society.1.5.2List of approval certificatesThe approval certificates issued to manufacturers are entered in a list containing the scope and the main condi-tions of approval available for consultation on the internet site “ ”.1.6Renewal of approval1.6.1The manufacturer shall apply for renewal of the approval certificate before the date of expiry. Renewal can be carried out by an audit and assessment of survey results,if satisfactory, during the period.Manufacturers who have not produced the approved prod-ucts during the period between renewals will be required to carry out approval tests or at the discretion of the Society,submit the results of production of similar products.1.7Reconsideration of the approval1.7.1During the period of validity, the approval may be reconsidered in the following cases :a)In service failures, traceable to product quality;b)Major non conformity during testing of the product ornon conformity revealed during fabrication and con-struction;c)Breakdown of the Manufacturer’s Quality System;d)Changes brought by the Manufacturer, without prelimi-nary agreement of the Society, to the extent of the approval defined at the time of the approval;1.8Responsibilities of the manufacturer1.8.1The Manufacturer is fully responsible for the quality of the finished product and ensuring compliance with the specified requirements, as checked on the specimens sub-jected to the approval tests.The routine production of approved products shall be car-ried out according to the same procedures followed for the manufacture of specimens submitted to approval tests.The manufacturer shall give prior warning to the Society of any significant modifications to the manufacturing and con-trol procedures. The Society may at its discretion, require further tests and surveys deemed necessary to extend the approval to the new manufacturing conditions.The manufacturer shall keep up-to-date records covering the manufacture and quality control of the products; the records shall contain details allowing the identification of the various productions, original materials, heat treatment and results of tests and examinations carried out. The Soci-ety’s surveyor is to have easy access to these records as deemed necessary.SECTION2R OLLED S TEEL P RODUCTS1General1.1Scope1.1.1This Section gives the scheme for the approval of the manufacturing process of rolled products made from hull structural steel grades, extra high strength steel grades, steel grades for boilers and pressure vessels, steel grades for low temperature applications, stainless steel grades and chain cable steel grades. It also applies to the approval of semi-finished products such as slabs, blooms and billets.1.2Specific information to be submitted1.2.1The following information is to be supplied by the manufacturer for all steel grades except for stainless steel grades (refer to [6]):a)Type of products (plates, sections, coils), grades of steel,range of thickness and aim material properties, as fol-lows:•Range of chemical composition and aim analyses, including grain refining, micro alloying and residualelements, for the various grades of steel; if the rangeof chemical composition depends on thickness andsupply condition, the different ranges are to be spec-ified, as appropriate;•Aim maximum carbon equivalent according to IIW formula;•Aim maximum Pcm content for higher strength grades with low carbon content C < 0,13 %;•Production statistics of the chemical composition and mechanical properties (R eH , R m , A% and KV).b)Steelmaking•Steelmaking process and capacity of furnace(s) or converter(s);•Raw material used;•Deoxidation and alloying practice;•Desulphurisation and vacuum degassing installa-tions, if any;c)Casting methods: ingot or continuous castingIn the case of continuous casting, information relevant to type of casting machine, teeming practice, methods to prevent re-oxidation, inclusions and segregation con-trol, presence of electromagnetic stirring, soft reduction, etc., is to be provided as appropriate;•Ingot or slab size and weight;•Ingot or slab treatment: scarfing and discarding pro-cedures.d)Reheating and rolling•Type of furnace and treatment parameters;•Rolling: reduction ratio of slab/bloom/billet to fin-ished product thickness, rolling and finishing tem-peratures;•Descaling treatment during rolling;•Capacity of the rolling stands.e)Heat treatment•Type of furnaces, heat treatment parameters and their relevant records;•Accuracy and calibration of temperature control devices.f)Programmed rollingFor products delivered in the controlled rolling (CR) or thermo-mechanical rolling (TM) condition, the follow-ing additional information on the programmed rolling schedules is to be given :•Description of the rolling process;•Normalizing temperature, re-crystallization temper-ature and Ar3 temperature and the methods used todetermine them;•Control standards for typical rolling parameters used for the different thickness and grades of steel (tem-perature and thickness at the beginning and at theend of the passes, interval between passes, reduc-tion ratio, temperature range and cooling speed ofaccelerated cooling, if any) and relevant method ofcontrol;•Calibration of the control equipment.g)Recommendations for working and welding in particu-lar for products delivered in the CR or TM condition•Cold and hot working recommendations if needed in addition to the normal practice used in the ship-yards and workshops;•Minimum and maximum heat input if different from the ones usually used in the shipyards and work-shops (15 - 50 kJ/cm).h)Where any part of the manufacturing process is assignedto other companies or other manufacturing plants, addi-tional information required by the Society is to be included.i)For the approval of the semi-finished products such asslabs, blooms and billets, the above information a), b) and c) is to be given.1.3Documents to be submitted for changingthe approval conditions1.3.1The manufacturer has to submit to the Society the documents required in [1.2] together with the request of changing the approval conditions, in the case of the follow-ing a) through e):a)Change of the manufacturing process (steel making,casting, rolling and heat treatment)b)Change of the maximum thickness (dimension)c)Change of the chemical composition, added element,etc.d)Subcontracting the rolling, heat treatment, etc.e)Use of the slabs, blooms and billets manufactured byother companies which are not approved.However, where the documents are duplicated by the ones at the previous approval for the same type of product, part or all of the documents may be omitted except the approval test program.1.4Approval survey1.4.1The approval tests are to be witnessed by the Sur-veyor at the manufacturer’s plant and the execution of the plant inspection in operation may be required by the Sur-veyor during the visit for the approval.If the testing facilities are not available at the works, the tests are to be carried out at recognised laboratories.1.5Position of the test samples1.5.1The test samples are to be taken, unless otherwise agreed, from the product (plate, flat, section, bar) corre-sponding to the top of the ingot, or, in the case of continu-ous casting, a random sample.The position of the samples to be taken in the length of the rolled product, and the direction of the test specimens with respect to the final direction of rolling of the material are indicated in the relevant table for the material.The position of the samples in the width of the product is to be in compliance with Pt D, Ch 2, Sec 1, [1.8] of the Rules for the Classification of Steel Ships.1.6Test specimens and testing procedure1.6.1The test specimens and testing procedures are to be in accordance with Pt D, Ch 1, Sec 2 of the Rules for the Classification of Steel Ships, unless agreed otherwise.In particular the following applies:a)Tensile test :•For plates made from hot rolled strip one additional tensile specimen is to be taken from the middle ofthe strip constituting the coil;•For plates having thickness greater than 40 mm, when the capacity of the available testing machine isinsufficient to allow the use of test specimens of fullthickness, multiple flat specimens, representing col-lectively the full thickness, can be used. Alterna-tively two round specimens with the axis located atone quarter and at mid-thickness can be taken.b)Impact test•For plates made from hot rolled strip one additional set of impact specimens is to be taken from the mid-dle of the strip constituting the coil•For plates having thickness greater than 40 mm one additional set of impact specimens is to be takenwith the axis located at mid-thickness•In addition to the determination of the energy value (Joule), the lateral expansion and the percentagecrystallinity are to be reported for each specimen. c)Chemical compositionIn general the content of the following elements is to be checked: C, Mn, Si, P, S, Ni, Cr, Mo, Al, N, Nb, V, Cu, As, Sn. Ti and, for steel manufactured from electric or open-hearth furnace, Sb and B. The material for the check analysis should be taken from the tensile test specimen.d)Sulphur printsSulphur prints are to be taken from plate edges which are perpendicular to the axis of the ingot or slab.They are to be approximately 600 mm long taken from the centre of the edge selected, i.e. on the ingot centre-line, and are to include the full plate thickness.e)Micrographic examinationThe micrographs are to be representative of the full thickness. For thick products in general at least three examinations are to be made at surface, one quarter and mid-thickness of the product.All photomicrographs are to be taken at x100 magnifi-cation and where ferrite grain size exceeds ASTM 10, additionally at x500 magnification. Where applicable, ferrite grain size should be determined for each photo-micrograph.f)Drop weight testWhen required the test is to be performed in accor-dance with ASTM E208. The NDT is to be determined and photographs of the tested specimens are to be taken and enclosed with the test report.The test results are to be in accordance, where applicable, with the requirements specified for the different steel grades in Pt D, Ch 2, Sec 1 of the Rules for the Classification of Steel Ships.。