ASME BPVC IX 2010 PDF

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WPS for production temper bead welding. The approximate location of beads to be deposited relative to the original base metal surface shall be identified, and the applicable parameters shall be used for the layers to be deposited as specified by the WPS.

This WPS shall describe the size of the beads to be deposited and the volts, amps, and travel speed to be used for the beads against the base metal, for each temper bead layer and for the fill and surface temper bead layers corresponding to the locations where repair welding is to be done. These shall be within the equivalent power ratio for machine or automatic welding for the respective layers given in QW In addition, each welder shall complete a proficiency demonstration.

For this dem- onstration, each welder shall deposit two or more weld beads using WPS parameters for each deposit layer. The test coupon size shall be sufficiently large to make the required weld bead passes. The minimum pass length shall be 4 in.

The heat input used by the welder shall be measured for each pass, and the size of each weld bead shall be measured for each pass, and they shall be as required by the WPS. The following essential variables shall apply for this demonstration: 1 a change from one welding procedure to another 2 a change from manual to semiautomatic welding and vice versa 3 a change in position based on a groove weld in either plate or pipe as shown in table QW The welder qualification is limited by the essential vari- ables given for each welding process.

The welding operator qualification is limited by the essential variables given in QW for each type of weld. A welder or welding operator may be qualified by volu- metric NDE of a test coupon or their initial production welding within the limitations of QW and QW or by bend tests taken from a test coupon. These paragraphs require that each manufacturer or con- tractor an assembler or an installer is to be included within this premise shall be responsible for conducting tests to qualify the performance of welders and welding operators in accordance with qualified Welding Procedure Specifica- tions, which his organization employs in the construction of weldments built in accordance with the Code.

The pur- pose of this requirement is to ensure that the manufacturer or contractor has determined that his welders and welding operators using his procedures are capable of developing the minimum requirements specified for an acceptable weldment. This responsibility cannot be delegated to another organization. It is not permissible for the manufacturer, contractor, assem- bler, or installer to have the welding performed by another organization.

It is permissible, however, to subcontract any or all of the work of preparation of test materials for weld- ing and subsequent work on the preparation of test speci- mens from the completed weldments, performance of nondestructive examination and mechanical tests, provided the manufacturer, contractor, assembler, or installer accepts full responsibility for any such work.

If in an organization effective operational control of the welder performance qualification for two or more companies of different names exists, the companies involved shall describe in the Quality Control system, the operational control of performance qualifications. In this case requali- fication of welders and welding operators within the com- panies of such an organization will not be required, provided all other requirements of Section IX are met.

When simultaneous qualifications are conducted, each participating organiza- tion shall be represented during welding of test coupons by an employee who is responsible for welder performance qualification. The welding procedure specifications WPS that are followed during simultaneous qualifications shall be com- pared by the participating organizations. The quali- fied thickness ranges for base metal and deposited weld metal need not be identical, but these thicknesses shall be adequate to permit welding of the test coupons.

Each participating organization's representative shall positively identify each welder or welding operator who is being tested. Each organizational representative shall also verify marking of the test coupon with the welder's or welding operator's identification, and marking of the top of the test coupon when the orientation must be known in order to remove test specimens.

Each organization's representative shall perform a visual examination of each completed test coupon and shall exam- ine each test specimen to determine its acceptability. Alter- natively, after visual examination, when the test coupon s are prepared and tested by an independent laboratory, that laboratory's report may be used as the basis for accepting the test results.

When the test coupon s is radiographically examined QW

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asme IX bpvc.ix.2010

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ASME BPVC IX (2010): 2011 Addendum to the 2010 Edition

WPS for production temper bead welding. The approximate location of beads to be deposited relative to the original base metal surface shall be identified, and the applicable parameters shall be used for the layers to be deposited as specified by the WPS. This WPS shall describe the size of the beads to be deposited and the volts, amps, and travel speed to be used for the beads against the base metal, for each temper bead layer and for the fill and surface temper bead layers corresponding to the locations where repair welding is to be done. These shall be within the equivalent power ratio for machine or automatic welding for the respective layers given in QW

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ASME BPVC IX (2010): Boiler and Pressure Vessel Code, Part IX, Welding and Brazing Qualifications

It also covers rules relating to the qualification and requalification of welders, brazers, and welding and brazing operators in order that they may perform welding or brazing as required by other Code Sections in the manufacture of components. Welding and brazing data cover essential and nonessential variables specific to the welding or brazing process used. Addenda will be issued in loose leaf format to facilitate insertion of replacement pages. The addenda service includes all updates issued prior to publication of the next edition in July

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