NI-2301

N-2301 REV. A ENGLISH OCT / 95

PROPERTY OF PETROBRAS 26 pages

ELABORATION OF TECHNICALDOCUMENTS FOR WELDING

Procedure

CONTEC This standard replaces and cancels the previous revision.

Comissão de NormasTécnicas nn Indication of clause, item, table or figure,which has its contents been altered

with respect to the previous revision.

The Responsible CONTEC Subcommittee provides guidance on theinterpretation of this Standard when questions arise regarding its contents.The Department of PETROBRAS that uses this Standard is the responsiblefor adopting and applying the clauses thereof.

SC - 26Welding

Mandatory Requirement: a provision established as being the mostadequate and which shall be used strictly in accordance with this Standard.If a decision is taken not to follow the requirement ("non-conformity" to thisStandard) it shall be based on well-founded economic and managementreasons, and be approved and registered by the Department of PETROBRASthat uses this Standard. It is characterized by the verb forms "shall", "it isnecessary...", "is required to...", "it is required that...", "is to...", "has to...","only ... is permitted", and other equivalent expressions having animperative nature.

Recommended Practice (nonmandatory) a provision that may be adoptedunder the conditions of this Standard, but which admits (and draws attentionto) the possibility of there being a more adequate alternative (not written inthis Standard) to the particular application. The alternative adopted shall beapproved and registered by the Department of PETROBRAS that uses thisStandard. It is characterized by the verbal form "should" and equivalentexpressions such as "it is recommended that..." and "ought to..." (verbs of anonmandatory nature). It is indicated by the expression: [RecommendedPractice].

Copies of the registered "non-conformities" to this Standard that maycontribute to the improvement thereof shall be submitted to the ResponsibleCONTEC Subcommittee.

Proposed revisions to this Standard shall be submitted to the ResponsibleCONTEC Subcommittee, indicating the alphanumeric identification andrevision of the Standard, the clause(s) to be revised, the proposed text, andtechnical/economic justification for revision. The proposals are evaluatedduring the work for alteration of this Standard.

Foreword

PETROBRAS technical standards are prepared by Working Groups – GTs(consisting of PETROBRAS specialists and PETROBRAS Subsidiaries specialists), are commented by LocalRepresentatives (representatives of the Industrial Units, Engineering Projects, Technical Divisions andPETROBRAS Subsidiaries), are approved by Responsible Subcommittees SCs (consisting of specialistsbelonging to the same speciality, representing the various PETROBRAS Departments and PETROBRASSubsidiaries), and approved by CONTEC General Assembly (consisting of representatives of theSuperintendencies of the PETROBRAS Departments and PETROBRAS Subsidiaries that use PETROBRAStechnical standards). A PETROBRAS technical standard is subjected to a revision at any time by theResponsible Subcommittee and must be reviewed every five years and if not revised, either revalidate orcancelled. PETROBRAS technical standards are prepared in accordance with standard PETROBRAS N1.For complete information about PETROBRAS standards see PETROBRAS Technical Standards Catalog.

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PREFACE

This Standard is the English version (issued in SEP/98) of Standard PETROBRAS N-2301REV. A OCT/95.

1 SCOPE

1.1 The standard establishes the required conditions for the elaboration of technicaldocuments to be used in planning, execution, control, recording, and certification of weldingoperations.

n 1.2 The standard is applicable to welding operations used in the fabrication, construction,assembly, or maintenance of equipment.

2 COMPLEMENTARY DOCUMENTS

The following documents are referenced in the text and contain valid rules for this Standard.

Decreto Lei nº 240 de 28 de fevereiro de 1967;Decreto Lei nº 62292 de 22 de fevereiro de 1968;Decreto Lei nº 81621de 03 maio de 1978;PETROBRAS N-133 -Welding;PETROBRAS N-381 - Technical Drawings and Other General Documents

Execution;PETROBRAS N-1438 - Soldagem;PETROBRAS N-1672 - Formulário para Documentos Técnicos em Geral forPETROBRAS N-1738 - Descontinuidades em Juntas Soldadas, Fundidas,

Forjadas e Laminadas;PETROBRAS N-1852 - Fabricação e Montagem de Estruturas Marítimas Fixas de

Aço;FBTS - 001 - Inspeção de Soldagem - Qualificação de Pessoal;API Std 1104 - Standard for Welding Pipe Lines and Related Facilities,

1994;ASME Boiler and Pressure Vessel Code - Section IX Edition, 1992;AWS D 1.1-92 - Structural Welding Code - Steel.

3 DEFINITIONS

The definitions contained in PETROBRAS N-1438 standard are adopted for the purposes ofthe present standard.









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4 GENERAL CONDITIONS

n 4.1 The standard shall be used together with the design standard, fabrication and assembly ofequipment and materials; prevailing the last ones in conflict cases.

4.2 Each document specified in this standard shall be elaborated when required inPETROBRAS N-133 standard or in the design, fabrication and equipment assembly standardsor in other contract documents.

4.3 All forms shall be elaborated in accordance with PETROBRAS N-1672 standard.

4.4 All metrological units shall be those legal in Brazil (see Brazilian Metrological Law in 2.1).When the nature of the subject matter indicates that the use of British (f.p.s.) units may beappropriate, said units shall be placed between parentheses, immediately following thecorresponding Brazilian legal unit.

4.5 All documents shall be filed in a fire-proof place, removed from inflammable products andprotected from rain and moisture.

n 4.6 All documents shall be approved by a welding inspector certified in accordance withFBTS-N-001 standard.

5 SPECIFIC CONDITIONS

nn 5.1 Documentation for Planning of Welding.

The document shown here, when required in accordance with item 4.2 of this standard, have tobe elaboreted according to the text bellow and approved before the welding.

5.1.1 The Welding Plan shall contain at least:

a) cover page, citing:- title of document;- equipment or material identifications;- identification of the fabrication or construction and assembly standard;- index of presented documents;

b) list of joints to be welded (LJS), elaboreted according to the ANNEX A of thisstandard;

c) applicable welding procedures (EPS), including those for repair work, elaboretedin accordance with ANNEX B of this standard;




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d) welding procedure qualification records submitted (RQPS), elaborated inaccordance with ANNEX C of this standard;

e) welder and welding operator certificates, elaborated in accordance withANNEX D of this standard.

5.1.2 The welding procedure qualification plan shall contain at least:

a) cover page, citing:- title of the document;- equipment identification;- identification of the qualification standard;- index of the presented documents.

b) list of the test pieces to be welded, citing:- identification code of the test piece;- welding procedure specification code;- welding processes;- specification of parent metal, diameter (if applicable), and thickness of each

member of joint;- type of joint;- type of chamfer;- welding position;

c) non-destructive testing plan, in a table form, listing the test pieces and the non-destructive tests applicable before and after welding and the heat treatment (whenrequired);

d) mechanical and macrographic testing plan, containing:- drawings of test pieces, indicating rolling direction, the location of the test

specimens with their respective identificationd;- table listing test specimens, mechanical tests to be performed, and standards

applicable to performance the tests, preparation of test specimens, andacceptance criteria.

5.1.3 The plan for welder and welding operator certification shall be elaborated in a similarway with the same minimum contents of the welding procedure qualification plan cited in item5.1.2 of this standard, in addition to criteria on disqualification and training.

5.1.4 The production testing plan shall contain at least:

a) cover page, listing:- title of the document;- equipment identification;- identification of fabrication or construction and assembly standard;- index of the presented documents;

b) list of the production tests to be executed, in a table form, listining;- welding procedures;- length of the weld foreseen for each welding procedure;


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- phase of fabrication, construction or assembly of the equipment in which eachpiece has be welded;

c) list of test pieces to be welded, elaboreted in accordance with item 5.1.2 b) of thisstandard;

d) non-destructive testing plan, elaboreted in accordance with item 5.1.2 c) of thisstandard;

e) mechanical and macrographic testing plan, elaboreted in accordance with item5.1.2 d) of this standard.

5.2 Documentation for Welding Execution and Control

The documents shown here, when required according to item 4.2 of this standard, have to beelaboreted and approved to be used in the welding execution and control and shall be availableto welders, operators, supervisors, and welding inspectors.

5.2.1 The instruction of execution and inspection of welding shall be elaborated in accordancewith ANNEX E of this standard.

5.2.2 The list of the qualified welders and operators shall be elaborated in accordance withANNEX F of this standard.

5.2.3 The performance control of the welders and welding operator shall be elaborated inaccordance with ANNEX G of this standard.

5.3 Documentation for Welding Records

Whenever required under item 4.2 supra, the documents cited herein shall be elaborated foruse as welding execution records.

5.3.1 The welding record report shall be elaborated in accordance with ANNEX H of thisstandard.

5.3.2 The heat treatment record report shall be elaborated in accordance with ANNEX I ofthis standard.

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/ANNEX A


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ANNEX A - INSTRUCTIONS FOR THE ELABORATION OF THE

JOINTS LIST TO BE WELDED (LJS)


1.1 A LJS shall be elaborated for each drawing fabrication and/or construction and assembly.

1.2 On one single drawing, those joints having the same characteristics defined in item 2.1below shall be listed only once.


The LJS shall contain, at least, the following information:

a) identification of reference drawing;b) identification of parent metal, diameter (if applicable), and thickness of each

member of joint;c) type of joint;d) type of chamfer;e) welding position;f) possibility of root access;g) identification of applicable welding procedure.

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/ANNEX B


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ANNEX B - INSTRUCTIONS FOR THE ELABORATION OF

THE WELDING PROCEDURE (EPS)

nn 1 GENERAL CONDITIONS

1.1 The EPS shall be elaborated based on design, equipment fabrication, consumable, andparent metal specifications and in accordance with the experience of whoever performs thewelding, observing the requirements set out in PETROBRAS standard N-133. After weldingthe test piece, welding parameter ranges shall be revised so that the values effectively used arecompatible with the tolerances permitted in the applicable qualification standards.

nn 2 SPECIFIC CONDITIONS

The EPS shall contain, at least, all information mentioned in the applicable qualificationstandards, in addition to:

a) identification of qualification standard;b) sketch of joint and chamfer;c) sketch of sequence of passes;d) trademark of consumables.

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/ANNEX C



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ANNEX C - INSTRUCTIONS FOR THE ELABORATION OF

THE WELDING PROCEDURE QUALIFICATION RECORDS (RQPS)

AND PRODUCTION TESTING RECORDS (RETP)


1.1 Whenever applicable, the following documents shall be annexed to the RQPS and RETP:

a) welding records report, elaborated in accordance with ANNEX H hereto, in thecase of RQPS;

b) heat treatment records report, elaborated in accordance with ANNEX I hereto;c) records report on non-destructive test results, elaborated in accordance with

applicable standards;d) mechanical and macrographic testing plan, elaborated in accordance with item

5.1.2 d) of the present standard;e) records report on machanical and metallographic test results, elaborated in

accordance with items 2.2 through 2.7 hereto;f) quality certificate for the consumables and parent metals, in the case of RQPS.

nn 2 SPECIFIC CONDITIONS

2.1 The RQPS and RETP shall contain, at least, the following information:

a) identification of the welding procedure;b) identification of the production test in the case of RETP;c) list of annexed documents and the their identifications;d) identification of applicable qualification standards, in the case of RQPS, or of

equipament fabrication or assembly standards, in the case of RETP.

2.2 The records report on tension test results shall contain at least the following information:

a) entity responsible for the test;b) identification of testing standard;c) identification (serial number) of test machine;d) identification, date of issue and name of the entity that issued the gauging

certificate for the test machine;e) identification of the standard for preparation of test specimens;f) identification of test piece and specimens;g) type and dimension of test specimens;h) identification of standard for evaluation of results;i) location of fracture;j) specified and measured tensile strenght;


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k) elongation (when applicable);l) final report.

2.3 The records report on the bending test results shall contain at least the followinginformation:

a) entity responsible for the test;b) identification of testing standard;c) type of test;d) diameter of plunger and distance between the support rollers on the test device;e) identification of the standard for preparation of test specimens;f) identification of the test piece and specimens;g) type and dimensions of test specimens;h) identification of standard for evaluation of results;i) bending angle;j) identification and dimensions of detected discontinuities;k) final report.

n 2.4 The records report on the impact test results shall contain at least the followinginformation:

a) entity responsible for the test;b) identification of testing standard;c) identification (serial number) of the test machine and thermometer used;d) identification of the designer of the used profile;e) identification, date of issue, and name of the entity that issued the gauging

certificate for the test machine and thermometer used;f) test temperature;g) identification of the standard for preparation of test specimens;h) identification of the test piece and specimens;i) type and dimensions of test specimens;j) orientation of test specimen in relation to rolling direction, when applicable;k) location of notch;l) identification of standard for evaluating of results;m) absorbed energy and/or lateral expansion and/or percentage of fragile fracture,

whichever is applicable, with specified and obtained values;n) final report.

2.5 The records report on macrographic test results shall contain at least the followinginformation:

a) entity responsible for the test;b) identification of standard for preparation of test specimens;c) identification of the test piece and specimens;d) macrophotograph of test specimens, indicating magnification used;e) reagent used;f) identification of standard for evaluation of results;


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g) sizing of the reinforcement of the fillet weld legs and the effective and realthroats.

h) magnification used for visual inspection;i) identification and dimensions of detected discontinuities;j) final report.

2.6 The records report on hardness test results shall contain at least the following information:

a) entity responsible for the test;b) identification of testing standard and type of hardness;c) identification (serial number) of test machine and standard sample used for

gauging the machine;d) identification, date of issue, and name of entity that issued the gauging certificate

for the test machine and for the standard sample used;e) identification of test piece and specimens;f) sketch of test specimen with indication of different weld zones and location of

spots of hardness profile;g) specified and measured hardness values;h) identification of standard for evaluation of results;i) final report.

2.7 The records report on the nick-break test results shall contain at least the followinginformation:

a) entity responsible for the test;b) identification of testing standard;c) identification of standard for preparation of test specimens;d) identification of the test piece and specimens;e) dimensions of the test specimens;f) identification of standard for evaluation of results;g) identification and dimensions of detected discontinuities;h) final report.

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/ANNEX D


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nn ANNEX D - INSTRUCTIONS FOR THE ELABORATION OF THE

WELDER AND WELDING OPERATOR CERTIFICATES (CQS)


The CQS shall be issued for each approved test of a welder or welding operator.


2.1 The CQS shall contain at least:

a) name of welder or welding operator;b) identification code (seal) of welder or welding operator;c) identification of applicable qualification standards;d) identification of welding procedure used;e) welding process;f) all essential variables, with values effectively used in qualification and qualified

strengths;g) types of tests and examinations performed;h) identification and type of test specimens used;i) results of tests and examinations performed, for each test specimens;j) identification, date of issue, and name of institution issuing the records reports on

tests and examinations performed;

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/ANNEX E


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ANNEX E - INSTRUCTIONS FOR THE ELABORATION OF THE WELDING

EXECUTION AND INSPECTION INSTRUCTIONS (IEIS)


1.1 Welding parameters in the IEIS shall be based on the values specified in the qualifiedwelding procedure and on the tolerances permitted in applicable qualification standards.

1.2 The IEIS shall be detailed for each joint to be welded. However, when the quantity ofweldments is so high that individualization is impracticable or unsuitable, identical joints maybe grouped. In any case, the individual joint shall be traceable to its applicable weldingprocedure.


2.1 The IEIS shall contain at least:

2.1.1 Drawing and identification of the equipment to be welded, indicating location of jointsto be welded.

2.1.2 Individual identification of joint or group of joints to be welded, as described in item 1.2supra.

2.1.3 Specific information on welding execution and inspection for joint or group of joints;that is:

a) identification of welding procedure;b) sketch of chamfer;c) specification of parent metal, diameter (if applicable), and thickness of each

member of joint;d) sketch of joint build-up sequence;e) welding parameters, cited for each weld pass; that is:

- welding process;- classification, trademark, and diameter of welding electrodes, wires, or rods;- type and intensity of current;- polarity, voltage, and speed (if applicable);- classification and trademark of flow (if applicable);- type and flow rate of purge and shielding gases (if applicable);


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- deposition technique, if applicable, rectilinear or oscillant and indication ofminimun or maximum value for width of pass;

- position and progression of welding (if applicable);f) initial and interpass cleaning method;g) gouging technique (if applicable);h) pre-heating temperature;i) interpass temperature;j) post-heating time and temperature (if applicable);k) indication of whether or not postweld heat treatment is required and identification

of execution procedure (if applicable);l) type, extension, and those activities responsible for the execution and monitoring

of non-destructive and other applicable tests, as well as definition of points ofretention (before or after root pass, at each layer, before or after postweld heattreatment).

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/ANNEX F


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ANNEX F - INSTRUCTIONS FOR THE ELABORATION OF THE LIST OF

CERTIFIED WELDERS AND WELDING OPERATORS (RSQ)


1.1 A RSQ shall be issued for each applicable qualification standard.

1.2 Each certification of a certain welder or welding operator shall be transcribed separatelyon the RSQ.


The RSQ shall contain at least:

a) identification of the qualification standard;b) name and identification code (seal) of the certified welder or welding operator;c) number of the welder or welding operator certificate;d) all essential applicable variables, with qualified ranges.

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/ANNEX G


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ANNEX G - INSTRUCTIONS FOR THE ELABORATION OF THE WELDER AND

WELDING OPERATOR PERFORMANCE CONTROL SHEETS (CDS)


1.1 A CDS shall be issued at time intervals that comply with the criteria in equipment designor fabrication and assembly standards or in contract documents.

1.2 Two separate control sheets shall be drawn up, one for radiographs and another forultra-sound.


The CDS shall contain at least:

a) welder or welding operator identification code;b) total number or radiographs taken or total length inspected during a certain

period, as applicable;c) total number of failed radiographs or sum of flawed lengths during a certain

period, as applicable;d) percentage of flaws, calculated by dividing the figure cited in item (c) supra by

the figure cited in item (b) and then multiplying by 100 (one hundred);e) accumulated amounts for items (b), (c), and (d) supra, through the date of issue

of the CDS;f) accumulated amount for item (d) in the previous CDS.

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/ANNEX H


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ANNEX H - INSTRUCTIONS FOR DRAWING UP THE

WELDING RECORD REPORTS (RRS)


A RRS is applicable to the welding of test pieces, as required in item 1.1 a) of ANNEX C ofthe present standard, and in the fabrication, assembly, and maintenance of equipment, whenrequired under items 4.2 and 5.3 of the present standard.


The RRS shall contain at least the following information:

a) identification of equipment or test piece;b) identification of joint;c) weld repair number, if applicable;d) identification of welding procedure;e) specification of parent metal, batch, diameter (if applicable), and thickness of each

member of the joint;f) identification of the welding execution and inspection instruction, if applicable;g) identification (serial number) of ammeter, voltmeter, and contact thermocouple;h) identification, date of issue, and name of the entity issuing the gauging certificate

for the ammeter, voltmeter, and contact thermocouple;i) name and seal of welders and/or welding operators executing welding;j) all information specified in the corresponding welding procedure, with the values

effectively used during welding itself, cited according to joint build-up sequence.

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/ANNEX I


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ANNEX I - INSTRUCTIONS FOR THE ELABORATION OF THE POSTWELD

HEAT TREATMENT RECORD REPORTS (RRTT)


The RRTT is applicable to the recording of postweld heat treatments of test pieces, as requiredunder item 1.1 b) of ANNEX C of the present standard, and in the fabrication, assembly, andmaintenance of equipment, when required under items 4.2 and 5.3 of the present standard.


The RRTT shall contain at least the following information:

a) type of postweld heat treatment executed;b) identification of applicable heat treatment procedure;c) identification of applicable execution standard;d) execution parameters; that is:

- initial and final control temperatures;- minimum and maximum heating rates;- minimum and maximum treatment temperatures;- minimum and maximum treatment times;- minimum and maximum cooling rates;- maximum temperature difference between thermocouples;

e) identification of equipment or test piece;f) identification (serial number) of temperature recorder used;g) identification, date of issue, and name of the entity issuing gauging certificates for

the temperature recorded and thermocouples used;h) indication of execution method; that is:

- oven heat treatment;- local heat treatment.

i) indication of means of heating used; that is:- fuel oil;- gas;- electrical resistance.

j) sketch of oven (if applicable), indicating location of equipment inside, of jetburners, and of electrical equipment inside, of jet burners, and of electricalresistances as well as the overlap regions whenever the equipment is not fullyinside the oven;

k) sketch of the welding joint, indicating location and distribution of electricalresistances and width of heat-affected zone, whenever local heat treatment isperformed;

l) type, quantity, and identification (number and color on graph) of thermocouplesused;

m) method for attaching thermocouples to part;


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n) sketch of equipment or test piece, indicating identification, location, and relativedistance between thermocouples;

o) record of test piece temperature versus time (time x temperature graph), withidentification of thermocouples used;

p) final technical statement, concluding whether the heat treatment was executed inaccordance with the applicable procedure and standards.

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NI-2301

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