MIL-PRF-2863C(SH)
3.6
Detrimental materials for grade B packing.
3.6.1 Halogen concentration. The sum of high-temperature water-leachable
halogens shall not exceed 250 ppm,
or
the total halogen concentration, excluding fluoride, shall not exceed 250 ppm,
and the packing manufacturer shall certify in writing that 'the only
intentionally added halide-bearing ingredient is polytetrafluoroethylene.'
(see 4.4.2).
3.6.2 Sulfur concentration. Total sulfur concentration shall not exceed 700
ppm or water-leachable sulfur shall not exceed 250 ppm (see 4.4.2).
3.6.3 Cadmium concentration.
Total cadmium concentration shall not exceed
250 ppm (see 4.4.2).
3.6.4 Lead concentration.
Total lead concentration shall not exceed 250 ppm
(see 4.4.2).
3.6.5 Mercury. During manufacturing, fabrication, handling and packaging,
the packing shall not come into contact with mercury or mercury compounds. The
manufacturer shall certify that mercury or mercury compounds did not come into
contact with the packing or packing elements, components or coatings during
manufacture.
3.7 Simulated performance. There shall be no leakage through the packing
when tested in accordance with 4.4.3. The packing rings shall be sufficiently
compressible or malleable so that they may be freely caulked into the tube
sheet drilling and seal the pressure without impeding the movement of the tube
or cause deformation of the tube.
3.8 Workmanship. The workmanship shall meet all requirements of this
specification. The rings shall be free from voids, cracks, seams, blisters,
tears, burrs and foreign matter that may affect the use of the finished
product. The ends of metallic rings shall be finished smooth (see 4.4.4).
3.9 Toxicity. The condenser packing shall have no adverse effect on the
health of personnel when used for its intended purpose (see 6.6).
3.10 Disposal. The manufacturer shall certify that condenser packing shall
not contain any hazardous material or exhibit any hazardous characteristic as
defined under 40 CFR 261 (Code of Federal Regulations). The manufacturer shall
make every effort to adhere to this requirement. If no product which meets
this requirement can be identified, (i.e., if condenser packing does contain a
hazardous material), the manufacturer shall provide information detailing
proper disposal of the packing.
4.
VERIFICATION
4.1 Classification of inspections.
The inspection requirements specified
herein are classified as follows:
a) Qualification inspection (see 4.2).
b) Conformance inspection (see 4.3).
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