S9074-AR-GIB-010/278
which are based on service, material, and thickness, do not apply to every welded joint in all classes of vessels, only those joint to which special requirements apply are included. Figure 4 illustrates typical joint orientations and placements included in Locations A, B, C, and D, as described below. 40.1.1.1 Locations A. Longitudinal weld joints within the main shell, communicating chambers, transitions in diameter, or nozzle; any weld joint within a sphere within a formed or flat head, or within the side plates of a flat sided vessel; circumferential welded joints connecting hemispherical heads to main shells, to transitions in diameter, to nozzles, or to communicating chambers. Notes: 1. Communicating chambers are defined as appurtenances to the vessel which intersect the shell or heads of a vessel and form an integral part of the pressure containing enclosure. e.g. sumps. 2. Side plates of a flat sided vessel are defined as any of the flat plates forming an integral part of the pressure containing enclosure. 40.1.1.2 Locations B. Circumferential welded joints within the main shell, communicating chambers, nozzles, or transitions in diameter including joints between the transition and a cylinder at either the large or small end; circumferential welded joints connecting formed heads other than hemispherical to main shells, to transitions in diameter to nozzles, or to communicating chambers. 40.1.1.3 Locations C. Welded joints connecting flanges, Van Stone laps, tube sheets, or flat heads to main shells, to formed heads, to transitions to diameter, to nozzles, connecting one side plate, to another side plate of a flat-sided vessel. 40.1.1.4 Locations D. Welded joints connecting communicating chambers or nozzles to main shells, to spheres, to transitions in diameter, to heads, or to flat-sided vessels, and those joints connecting nozzles to communicating chambers (for nozzles at the small end of a transition in diameter, see Locations B). 40.1.2 When butt welded joints are required elsewhere in this document for Locations B, an angle joint connecting a transition in diameter to a cylinder shall be considered as meeting this requirement provided the angle, a (see Figure 4) does not exceed 30 degrees. All requirements pertaining to the butt welded joint shall apply to the angle joint. 40.1.3 Test results shall be recorded and signed by the activity's responsible official. Records shall be identifiable to the vessel and welds they represent and shall include date of tests and bend radius. Records shall be maintained along with other documentation required herein. 40.2 Testing of Welds in Other than Class A Components. 40.2.1 Each welder and welding operator qualified for pipe shall satisfactorily complete one pipe test coupon for visual and color inspection and
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