For the circumferential weld joints of the shell-side cylinder in steel fixed-plate heat exchangers where non-destructive testing is not possible
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For the circumferential weld joints of the shell-side cylinder in steel fixed-plate heat exchangers where non-destructive testing is not possible, when TIG welding is used for the root pass or when gaskets in close contact with the base metal are used along the entire length of the weld joint, the weld joint coefficient φ = 0.6. May I ask whether this circumferential joint refers to the joint where the cylinder is welded to the tube sheet, or to the joint where cylinders are butted together?
This circumferential joint refers to the joint where the cylinder is welded to the tube sheet
It refers to the joint where the cylinder body is welded to the tube sheet.
If the joint between the cylinder and the tube sheet is a Class C weld, can it be referred to as a circumferential joint?
If the joint between the cylinder and the tube sheet is a Class C weld, can it be referred to as a circumferential joint?
Then can you consider this weld to be a longitudinal joint?
It should refer to the circumferential weld joint of the shell side cylinder. Generally, separate inspection requirements are specified for the weld joints between the tube sheet and the shell side.
It refers to the joint where the cylinder body is welded to the tube sheet
It refers to the joints where the cylinder body is welded to the tube sheet; the circumferential joints between cylinder bodies can be inspected, and indeed must be inspected.