structural-integrity/verification.html

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<title>Pre-Load Verification Protocol</title>
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<h1>PRE-LOAD VERIFICATION PROTOCOL</h1>
<p><strong>DOCUMENT ID:</strong> AVS-PROC-004<br>
<strong>APPLICABILITY:</strong> CLASS III ASSEMBLIES // GRADE 8 FASTENERS</p>
<div class="failure-banner">
HALT: IF ANY STEP IN PHASE 1 FAILS VISUAL INSPECTION, ABORT ASSEMBLY. DO NOT APPLY TORQUE.
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<h2>PHASE 1: VISUAL INSPECTION</h2>
<div class="checklist">
<div class="check-item">
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<div class="check-desc">Verify 6-radial dash marking on bolt head.</div>
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<div class="check-note">Absence indicates Grade 5 or lower. Rejection mandatory.</div>
<div class="check-item">
<div class="check-box"></div>
<div class="check-desc">Inspect threads for nicks, galling, or deformation.</div>
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<div class="check-note">Damage >0.002in requires replacement.</div>
<div class="check-item">
<div class="check-box"></div>
<div class="check-desc">Confirm washer face is free of burrs.</div>
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<div class="check-note">Burrs create uneven load distribution.</div>
<div class="check-item">
<div class="check-box"></div>
<div class="check-desc">Check substrate surface for rust/paint flaking.</div>
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<div class="check-note">Clean to bare metal within 1.5x washer diameter.</div>
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</section>
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<h2>PHASE 2: LUBRICATION SEQUENCE</h2>
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<div class="check-item">
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<div class="check-desc">Apply Ni-Cr Anti-Seize to external threads only.</div>
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<div class="check-note">Do not coat under-head bearing surface.</div>
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<div class="check-box"></div>
<div class="check-desc">Rotate nut to distribute lubricant evenly.</div>
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<div class="check-note">Ensure full coverage of lead-in threads.</div>
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<div class="check-desc">Wipe excess from bolt shank.</div>
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<div class="check-note">Excess attracts contaminants.</div>
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</section>
<section>
<h2>PHASE 3: STAR-PATTERN TORQUING</h2>
<p>For multi-bolt flanges (>4 bolts), follow the star sequence. Single-pass torquing is prohibited.</p>
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<div class="check-desc"><strong>PASS 1:</strong> Seat nuts to 30% of target torque.</div>
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<div class="check-item">
<div class="check-box"></div>
<div class="check-desc"><strong>PASS 2:</strong> Advance to 60% of target torque.</div>
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<div class="check-item">
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<div class="check-desc"><strong>PASS 3:</strong> Final tighten to 100% specification.</div>
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<div class="check-note">Wait 60 seconds after Pass 3 before re-check.</div>
<div class="check-item">
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<div class="check-desc">Re-verify all bolts in reverse star sequence.</div>
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<div class="check-note">Acceptable variance: ±5% of target.</div>
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</section>
<section>
<h2>FAILURE LOG</h2>
<p>If re-verification shows variance >5%, record the following:</p>
<ul>
<li>Bolt ID (position in pattern)</li>
<li>Measured Torque vs. Target</li>
<li>Lubricant Condition (dry/wet/degraded)</li>
<li>Action Taken (Replace / Retighten / Abort)</li>
</ul>
</section>
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