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AS 3992:2020


Pressure equipment — Welding and brazing qualification

Sets out requirements for the qualification of welding and brazing procedures, welders and brazers, and requirements for production weld testing other than non-destructive examination, when used in the manufacture, alteration and repair of boilers, pressure vessels, pressure piping and their components.
Published: 26/06/2020
Pages: 144
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Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope and general
1.1 Scope and application
1.1.1 Scope
1.1.2 Application
1.2 Referenced documents
1.3 Terms and definitions
1.4 Other processes
1.5 Other materials
1.6 Welding and brazing—supervision
2 Prequalified welding procedures
2.1 General
2.2 Prequalified gases
3 Qualification of welding procedures for butt, branch and fillet welds
3.1 General
3.2 Methods of qualification of welding procedure
3.3 Recording of welding procedure data
3.4 Testing of welding procedure test welds
3.5 Requalification of a welding procedure
3.6 Portability of qualified welding procedures
3.7 Welding procedure specification for new pressure equipment
3.8 Welding procedures for repair welding of new pressure equipment
3.9 Repairs, replacement or alteration to in-service pressure equipment
4 Items to be recorded for welding procedure test welds
4.1 General
4.2 Items specific to nominated welding processes
4.3 Recording of welding procedure test welds
5 Essential variables for welding procedure qualification
5.1 General
5.2 Material grouping
5.2.1 General
5.2.2 Extension of qualification
5.3 Welding energy input
5.4 Preheat and post weld heat treatment
6 Weld test pieces
6.1 Test pieces
6.1.1 When required
6.1.2 Form
6.1.3 Dimensions
6.1.4 Preparation
6.1.5 Assessment
6.2 Visual examination
6.3 Non-destructive examination of test pieces
6.4 Postweld heat treatment
6.4.1 Test piece
6.4.2 Heat treatment parameters
6.4.3 Operation
7 Mechanical testing of welds for procedure qualification
7.1 General
7.2 Test specimens
7.2.1 Types of tests and number of test specimens
7.2.2 Removal of test specimens
7.2.3 Identification of specimens
7.3 Transverse tensile test
7.3.1 Method
7.3.2 Requirements
7.4 All-weld-metal tensile test
7.4.1 Method
7.4.2 Requirements
7.5 Bend test
7.5.1 Method
7.5.2 Requirements
7.6 Charpy V-notch impact test
7.6.1 Method
7.6.2 Requirements
7.6.3 Retests
7.7 Macro examination
7.7.1 Method
7.7.2 Requirements
7.8 Weld joint hardness test
7.8.1 Method
7.8.2 Requirements
7.9 Fracture test—fillet welds
7.9.1 Method
7.9.2 Requirements
7.10 Fracture test—butt welds
7.10.1 Method
7.10.2 Requirements
7.11 Additional tests before rejection
7.11.1 Number of retests
7.11.2 Requirement
7.12 Reporting of results
8 Procedure qualification for special welds
8.1 General
8.2 Special welds not represented by a butt, branch or fillet weld
8.2.1 Build-up, buttering overlays and clad materials General Hardness traverse Acceptance criteria
8.2.2 Corrosion or heat-resistant weld metal overlay Items to be recorded for welding procedure testing Essential variables Test piece Non-destructive examination Test specimen Chemical analysis Qualification range Acceptance criteria
8.2.3 Hard surfacing (wear resistant) weld metal overlay Items to be recorded for welding procedure testing Essential variables Test piece Non-destructive examination Test specimen Chemical analysis Qualification range Acceptance criteria
8.2.4 Surfacing procedure qualification Testing Qualification range
8.3 Temper bead welding during manufacture
8.3.1 General
8.3.2 Items to be recorded for welding procedure testing
8.3.3 Essential variables
8.3.4 Test pieces
8.3.5 Non-destructive examinations
8.3.6 Test specimens
8.3.7 Mechanical test
8.3.8 Repair welding during manufacture
8.4 Weld repairs to service exposed pressure equipment
8.4.1 General
8.4.2 Repair procedure
8.4.3 Weld procedure qualification
8.5 Tube to tube plate welding
9 Welder qualification
9.1 General
9.2 Methods of qualification
9.3 Extent of approval of welder qualification
9.4 Information for welder for qualification test welds
9.5 Examination and testing of welder qualification test welds
9.5.1 Methods of examination and testing
9.5.2 Preparation and testing of specimens for destructive testing General Butt, branch and fillet welds Special welds
9.6 Recording of welder qualification tests
9.7 Retests
9.8 Renewal of welder qualification
10 Weld production tests
10.1 Production test plates
10.2 Equipment requirements of production test plates
10.3 Number of production test plates
10.3.1 For single boiler or pressure vessel
10.3.2 For multiple boilers and pressure vessels
10.4 Preparation of production test plates
10.5 Preliminary examination of test plates
10.6 Treatment of test plates
10.7 Testing of test plates
10.8 Additional tests before rejection
10.9 Records
11 Brazing qualification
11.1 General
11.2 Qualification required
11.3 Grouping of materials for brazing qualification
11.4 Grouping of brazing filler metals
11.5 Brazing flow positions
11.6 Records
12 Qualification of brazing procedure
12.1 General
12.2 Requalification of a brazing procedure
12.3 Portability of qualified brazing procedure
12.4 Prequalified brazing procedure
12.5 Items to be recorded for brazing procedure qualification test brazes
12.6 Essential variables for brazing procedure qualification
12.7 Test pieces for brazing procedure qualification
12.8 Visual examination
13 Examination and testing of brazed joints
13.1 Removal of test specimens
13.2 Transverse tensile test
13.2.1 Preparation
13.2.2 Test method
13.2.3 Requirements
13.3 Bend test
13.3.1 Preparation
13.3.2 Method
13.3.3 Requirements
13.4 Peel test
13.4.1 Preparation
13.4.2 Method
13.4.3 Requirements
13.5 Sectioning test
13.5.1 Preparation
13.5.2 Method
13.5.3 Requirements
13.6 Workmanship specimen test
13.6.1 Preparation
13.6.2 Method
13.6.3 Requirements
13.7 Retests
14 Brazer and brazing operator qualification
14.1 Methods of qualification
14.2 Essential variables for qualification of brazing personnel
14.3 Extent of approval of brazing qualification
14.4 Information to be given to brazer or brazing operator for qualification test joint
14.5 Qualification test joints and testing
14.5.1 Test joint
14.5.2 Test specimens
14.5.3 Testing, examination and acceptance requirements
14.6 Recording of brazer and brazing operator qualification tests
14.7 Retests
14.8 Renewal of brazer qualification
15 Aluminothermic welding of electrical conductors
15.1 Prequalified welding procedure
15.2 Procedure qualification
15.3 Production test
16 Thermocouple attachment joints
16.1 General
16.2 Prequalification procedures
16.3 Test joint
16.4 Procedure qualification tests
16.5 Qualification of operator
17 Welding qualification of non-metallic materials
17.1 Scope
17.2 General requirements
18 Special treatment of welds
18.1 Scope
18.2 Procedure qualification
Appendix A
Appendix B
B1 General
B2 Information to be recorded
Appendix C
C1 General
C2 Details of tests
Appendix D
Appendix E
E1 General
E2 Nickel and nickel alloys
E2.1 Preparation of surface
E2.2 Etching solutions
E2.3 Etching procedure
E3 Titanium
E3.1 Preparation of surface
E3.2 Etching solution
E3.3 Etching procedure
Appendix F
Appendix G
Appendix H
Appendix I
I1 Stainless steel
I1.1 General
I1.2 Heat tint and oxide scale
I2 Titanium
Amendment control sheet
AS 3992:2020
Amendment No. 1 (2023)
Revised text amendment
Cited references in this standard
Content history