ISO 11970:2016
Specification and qualification of welding procedures for production welding of steel castings
ISO 11970:2016 specifies how a welding procedure specification (WPS) for production welding of steel castings is qualified.
It defines the conditions for the execution of welding procedure qualification tests and the limits of validity of a qualified welding procedure for all practical welding operations within the range of essential variables.
Tests are intended to be carried out in accordance with this International Standard unless additional tests are specified by the purchaser or by agreement between the contracting parties.
ISO 11970:2016 applies to the arc welding of steel castings. The principles of this International Standard can be applied to other fusion welding processes subject to agreement between the contracting parties.
In the case of specific service, material or manufacturing conditions, tests more comprehensive than those specified by this International Standard can be specified by the purchaser, in order to gain more information, e.g. longitudinal weld tensile tests, bend tests, chemical analyses, ferrite determination in austenitic stainless steels, elongation, Charpy "V" impact tests, and radiography.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Preliminary welding procedure specification (pWPS)
5 Welding procedure qualification
6 Test piece
6.1 General
6.2 Shape and dimensions of test piece
6.3 Welding of sample
7 Examination and testing
7.1 Extent of testing
7.2 Location and cutting of test specimens
7.3 Non-destructive testing
7.4 Destructive test
7.4.1 Transverse (to weld groove) tensile test
7.4.2 Macro-examination
7.4.3 Micro-examination
7.4.4 Impact test
7.4.5 Hardness test
7.5 Qualification and retesting
7.6 Welder qualification
8 Range of qualification
8.1 General
8.2 Related to the manufacturer
8.3 Related to the material
8.3.1 Parent metal — Grouping system for cast steel grades
8.3.2 Parent metal thickness (range of qualification)
8.4 Common to all welding procedures
8.4.1 Welding process
8.4.2 Welding positions
8.4.3 Type of joint
8.4.4 Filler metal
8.4.5 Type of current
8.4.6 Heat input
8.4.7 Preheat temperature
8.4.8 Interpass temperature
8.4.9 Post-weld heat treatment
8.5 Specific to process
8.5.1 Processes 111 [manual metal arc welding (metal arc welding with covered electrode); shielded metal arc welding] and 114 (self-shielded tubular-cored arc welding).
8.5.2 Process 121 (submerged arc welding with one wire electrode)
8.5.3 Processes 131 (metal-arc inert gas welding; MIG welding; gas metal arc welding), 135 (metal active gas welding; MAG welding; gas metal arc welding), 136 (tubular cored metal arc welding with active gas shield; flux cored arc welding) and 138 (MAG we
8.5.4 Process 141 (Tungsten inert gas welding; TIG welding; gas tungsten arc welding)
9 Welding procedure qualification record (WPQR)
Annex A (informative) Record form (WPQR) welding procedure qualification — Test certificate
Annex B (normative) Details of weld test
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Preliminary welding procedure specification (pWPS)
5 Welding procedure qualification
6 Test piece
6.1 General
6.2 Shape and dimensions of test piece
6.3 Welding of sample
7 Examination and testing
7.1 Extent of testing
7.2 Location and cutting of test specimens
7.3 Non-destructive testing
7.4 Destructive test
7.4.1 Transverse (to weld groove) tensile test
7.4.2 Macro-examination
7.4.3 Micro-examination
7.4.4 Impact test
7.4.5 Hardness test
7.5 Qualification and retesting
7.6 Welder qualification
8 Range of qualification
8.1 General
8.2 Related to the manufacturer
8.3 Related to the material
8.3.1 Parent metal — Grouping system for cast steel grades
8.3.2 Parent metal thickness (range of qualification)
8.4 Common to all welding procedures
8.4.1 Welding process
8.4.2 Welding positions
8.4.3 Type of joint
8.4.4 Filler metal
8.4.5 Type of current
8.4.6 Heat input
8.4.7 Preheat temperature
8.4.8 Interpass temperature
8.4.9 Post-weld heat treatment
8.5 Specific to process
8.5.1 Processes 111 [manual metal arc welding (metal arc welding with covered electrode); shielded metal arc welding] and 114 (self-shielded tubular-cored arc welding).
8.5.2 Process 121 (submerged arc welding with one wire electrode)
8.5.3 Processes 131 (metal-arc inert gas welding; MIG welding; gas metal arc welding), 135 (metal active gas welding; MAG welding; gas metal arc welding), 136 (tubular cored metal arc welding with active gas shield; flux cored arc welding) and 138 (MAG we
8.5.4 Process 141 (Tungsten inert gas welding; TIG welding; gas tungsten arc welding)
9 Welding procedure qualification record (WPQR)
Annex A (informative) Record form (WPQR) welding procedure qualification — Test certificate
Annex B (normative) Details of weld test
Bibliography