What Is A Number In Asme Section Ix

Another type of grouping for filler metal or welding rod is the a number.

What is a number in asme section ix.

Ferrous metals which have specified impact test requirements have been assigned group numbers within p numbers. In most of welding process the p number f number a number pwht thickness out of specified range are essential variable. It is the construction code such as asme section viii div 1 or b31 3 etc. 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.

The document is written and maintained by volunteers chosen for their technical expertise. The table qw 442 in asme code section ix provides the list of a number. Asme section ix specifies the requirements for the qualification of welders and the welding procedure specifications. A change in the chemical composition of the weld deposit from.

There is a common misunderstanding that if you follow asme code section ix requirements to qualify and describe. To reduce the number of welding and brazing procedure qualifications required base metals have been assigned p numbers by the asme bpvc. The asme works as an accreditation body and entitles independent third parties such as verification testing and. Please note the a number in wps does not refer to the filler wire or electrode chemical composition.

Section ix of the asme bpvc. 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. What is asme section ix. The s number was removed from asme section ix in 2009.

These materials were also covered by the p number but not the converse. Asme section ix code is set of rules guidelines and requirements for welding brazing and fusing qualifications. However these numbers were assigned to those materials included for pipework to the asme b31 code for pressure piping. It is a reference code that helps for bpvc construction codes for qualifications of welder or welding operator brazer or brazing operator and fuser or fusing operator.

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. Applicable only to ferrous metals.

The a number is essential variable in most of welding process in asme code section ix. This can be found in asme bpvc section ix table qw 442. Please note the asme code section ix is only a referencing code. Please watch the video given below for more clarity on this topic.

It refers to the deposited weld metal chemical composition. A number grouping has been done on the basis of the chemical composition of the deposited weld metal.