MIL-STD-2042-2B(SH)
NOTE: Keep BOF tube couplers and the ends of BOF tubes clean and free of contaminants.
NOTE: BOF tube couplers may be cleaned using distilled water and blown dry with air. Do not clean or soak BOF tube couplers in alcohol or other cleaning agents. BOF tube couplers can be permanently damaged by exposure to alcohol and cleaning agents.
NOTE: Previously used BOF tube couplers may not adequately seal to BOF
tubes. When installing BOF cabling, always use new BOF tube couplers.
CAUTION: Do not disengage mated BOF tube couplers. Disengaging utilized BOF tube couplers may damage/break the optical fibers contained within the BOF tubes.
Step 1 - Verify that the procedures of Method 2G1 or Method 2H1 of this standard practice have been completed for all BOF cables entering the tube routing box.
Step 2 - Open the tube routing box cover and visually examine the BOF tubes for cuts or kinks before continuing.
Step 3 - CAUTION: Do not exceed a bend diameter of 13 cm (5 in) for the BOF
tubes. BOF tubes may collapse at diameters less than 13 cm (5 in).
Choose a BOF cable and route BOF tube number one to the nearest side of the box. Route the BOF tube along the side and mark the tube 100 to 150 mm (4 to 6 in) from the far corner of the box. Successively route and mark each BOF tube within the BOF cable (staggering each tube approximately 44 mm (1.7 in) shorter than the previous tube is recommended). Using the tube cutter, cut each tube at the mark. Visually verify that the end of the tube is cut perpendicular to the
tube length. Clean the end of each BOF tube with a wipe dampened with alcohol and blow dry as necessary.
NOTE: Small BOF tube bend diameters may not allow 12 and 18-fiber BOF bundles to be blown through the tube routing box. Maximize BOF tube bend diameters to the maximum extent practicable.
NOTE: BOF tube bend diameters less than 18 in will negatively impact the blowing distances achievable for 12 and 18-fiber BOF bundles.
Step 4 - CAUTION: Do not overheat the BOF tubes. Prolonged exposure of the BOF tubes to temperatures above 160oC (320oF) may damage them. Discontinue heating of the sleeve and allow the BOF tubes to cool before reheating if the tubes show any signs of bubbling or swelling.
Slide the heat shrink tubing with the tube identification onto each BOF tube of the BOF cable approximately 100 mm (4 in) from the tube end. Holding the heat gun approximately 100 mm (4 in) away from each BOF tube, shrink the shrink tubing.
Step 5 - Form the BOF tubes into a flat group and route the group along the side of the box as follows (see figure 2I1-1):
2I1-2 METHOD 2I1
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