ASME IX Overview
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​​Key ASME code Sections for general welding of pressure vessels
Section II Materials Part A Ferrous Materials Specifications
Section II Materials Part C Specifications for Welding Rods, Electrodes, and Filler Metals
Section V Non-destructive Examination
Section VIII Rules for Construction of Pressure Vessels Division 1
Section IX Welding, Brazing, and Fusing Qualifications
Structure of ASME IX (Welding)
Part QG General Requirements
Part QW Welding
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Article I – Welding General Requirements
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Article II – Welding Procedure (Process) Qualifications
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This is the welding process, not the welder. Each process has a table detailing the EV, NEV & SEV for the welding process.
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Article III – Welding Performance (Person) Qualifications
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These are the requirements for the welder. Each process has a table detailing the EV, NEV & SEV for the welder.
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Article IV – Welding Data
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This section lays out the requirements for the variables detailed in the tables in articles II & III. There are also details of material P numbers and Consumables F numbers.
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Notes
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EV
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QG-105.1 Essential Variables (Procedure) - These are variables that are considered to affect the mechanical properties, and if a weld goes outside the variable's range, the procedure must be requalified.
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EV - QG-105.2 Essential Variables (Performance) – These are variables that will affect the ability of the person to produce a sound weld
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NEV
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QG-105.4 Nonessential Variables. These are variables that are considered not to affect the mechanical properties of the joint. The variables shall be recorded or considered to be recorded on the WPS.
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SEV
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QG-105.3 Supplementary essential variables are variables where a change will affect the toughness (impact) properties of the joint, heat-affected zone, or base material. When toughness (impact) does not apply, then these variables are not applicable
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QG-106 Organizational Responsibility (Personnel Performing Supervisory Activities)
WEC can help with this section
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​The ASME IX requires manufacturers to have designated responsible personnel performing 'supervisory activities' for welding. This relates to witnessing PQRs, writing WPSs and witnessing welder tests, etc.
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They should have or be
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Designated by the organization with responsibility for certifying qualification documents
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Have a satisfactory level of competence in accordance with the organization's quality program. As a minimum, they shall be qualified by education, experience, or training in the following areas:
(1) knowledge of the requirements of this Section for the qualification of procedures and/or joining personnel
(2) knowledge of the organization's quality program
(3) the scope, complexity, or special nature of the activities to which oversight is to be provided
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Have a record, maintained by the organization, containing objective evidence of the qualifications, training, or experience.
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WEC have over 18 years’ experience witnessing PQRs, writing WPSs and witnessing welders' tests. WEC can provide an ASME-specific CV detailing their experience, which should be acceptable to your ASME inspectors.
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If you want to discuss any aspects of WPQRs or you want more information about setting the best range, please contact WEC using the Contact page
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If you want to discuss any aspects of PQRs or you want more information about setting the best range, please contact WEC using the Contact page