IN-PROCESS INSPECTION

TM 5-5420-279-23

IN-PROCESS INSPECTION

General

Minimum required in-process inspections are identified throughout this repair section. Additional

inspections may be established by the contractor/depot as necessary. These inspections fall into

one of three groups as follows:

(1)

Quality of welds.

(2)

Specified component dimensions after welding.

(3)

Specified component dimensions after machining.

(4)

The component dimensions will be checked using standard measuring equipment to

drawing requirements.

Inspection of Welds

Before commencement of welding the joint must be inspected to confirm correct form and

dimensions of weld preparation and to ensure it has been cleaned satisfactorily by degreasing

and wire brushing.

The following items should be checked after the completion of all welding and again after any

repair welding:

(1)

Cleaning and dressing: When dressing of the weld face is required, ensure that

overheating of the joint due to the dressing action, dressing marks and an uneven finish

are avoided. In the case of fillet welds and butt welds that are to be dressed flush, ensure

that the joint merges smoothly with the parent metal without under-flushing.

(2)

Penetration and root examination (fig. 3-1): In the case of butt welds made from one

side only, check that over the whole of the joint the penetration and any root concavity, or

shrinkage grooves are within the limits specified in the acceptance criteria, using

appropriate measuring devices and optical or other aids if necessary from the access point

of view.

Figure 3-1 Root defects

Appendix K Page 11