What Is A Number In Asme Section Ix

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What is a number in asme section ix.

The asme code is the american society of mechanical engineers asme standard that regulates the design development and construction of boilers and pressure vessels. It is the construction code such as asme section viii div 1 or b31 3 etc. Please note the a number in wps does not refer to the filler wire or electrode chemical composition. The s number was removed from asme section ix in 2009.

The asme works as an accreditation body and entitles independent third parties such as verification testing and. A number grouping has been done on the basis of the chemical composition of the deposited weld metal. It refers to the deposited weld metal chemical composition. This can be found in asme bpvc section ix table qw 442.

Another type of grouping for filler metal or welding rod is the a number. The a number is essential variable in most of welding process in asme code section ix. Applicable only to ferrous metals. The document is written and maintained by volunteers chosen for their technical expertise.

A change in the chemical composition of the weld deposit from. However these numbers were assigned to those materials included for pipework to the asme b31 code for pressure piping. The a number is a calculated value based on a combination of the chemical composition of the weld filler metal which may be found in asme section ii part c and asme section ix s a number table qw 442. The table qw 442 in asme code section ix provides the list of a number.

To reduce the number of welding and brazing procedure qualifications required base metals have been assigned p numbers by the asme bpvc. Asme section ix code is set of rules guidelines and requirements for welding brazing and fusing qualifications. The table qw 422 provides material p number and group numbers. Asme section ix specifies the requirements for the qualification of welders and the welding procedure specifications.

The s number s purpose was identical to the p number. Section ix of the asme bpvc. What is asme section ix. That is determining it.

The asme code section ix is not determining of application of group numbers. The asme boiler pressure vessel code bpvc is an american society of mechanical engineers asme standard that regulates the design and construction of boilers and pressure vessels. These materials were also covered by the p number but not the converse. In most of welding process the p number f number a number pwht thickness out of specified range are essential variable.

Based on requirements of asme code section ix all essential variable nonessential variable and supplementary essential variable such as group number must be indicated in the welding procedure specification. Ferrous metals which have specified impact test requirements have been assigned group numbers within p numbers.