S9407-AB-HBK-010 Datasheet, PDF (223/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
4.6.1 Visual inspection. Convoluted tubing shall be inspected prior to application of braid to verify
that there are no gaps, cracks, breaks, or other defects in material, construction, or workmanship.
4.6.2 Dimensional inspection. Measurements shall be made on the conduit to determine
compliance with dimensional requirements. Any dimension that is not within the specified tolerance
shall be classified a defect.
4.6.3 Braid coverage. The coverage of the wire braid shall be determined by measuring at three
widely separated areas of a length of conduit. The areas measured shall be representative of the
entire braid. The diagram of figure 2 shows a typical section of braid, with a unit area having
dimensions C and D. The uncovered portion of the unit area is shown by dimensions A and B. The
percent of braid coverage shall be computed by using the formula below, and shall equal minimum of
90 percent.
Percent of braid coverage = 100(1-AB/CD)
Table IV. Quality conformance inspection.
Inspection
Visual 1/
Dimensional 1/
Watertightness 1/
Visual 2/
Dimensional 2/
Braid coverage 2/
Tightness of covering 2/
Bend radius 3/
Shielding effectiveness 3/
4/
Requirement
Paragraph
3.6, 3.9, 3.11
3.6.1
3.7.1
3.6, 3.9, 3.11
3.6.1
3.6.5
3.6.6
3.7.2
3.7.3
Test method
Paragraph
4.6.1
4.6.2
4.6.5
4.6.1
4.6.2
4.6.3
4.6.4
4.6.6
4.6.7
1/ Inspection shall be performed on each length of bare tubing, prior to application of
braid.
2/ Inspection shall be performed on each length of completed conduit, for both Type
1 and Type 2.
3/ Inspection shall be performed on one sample from each production lot.
4/ The production-lot shielding effectiveness test nee be conducted at only one
frequency. The frequency selected is optional to the supplier but shall be a
frequency between 30 and 100 Hz.
Reprinted without change
D-9