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  <!-- Rank #1: Homepage, P-T Saturation Calculator & Master NIST 41-Point Table -->
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    <lastmod>2026-11-02</lastmod>
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    <priority>1.0</priority>
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  <!-- Automotive AC Operating Pressures (SAE J639) -->
  <url>
    <loc>https://r134apressurechart.com/automotive</loc>
    <lastmod>2026-11-02</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- Calibrated On-Screen Edge Ruler & Fitting Sizer -->
  <url>
    <loc>https://r134apressurechart.com/ruler</loc>
    <lastmod>2026-11-02</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- AC Manifold Gauge Diagnostic Triage -->
  <url>
    <loc>https://r134apressurechart.com/diagnostics</loc>
    <lastmod>2026-11-02</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- Thermodynamic Superheat & Subcooling Calculators -->
  <url>
    <loc>https://r134apressurechart.com/superheat-subcooling</loc>
    <lastmod>2026-11-02</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Master FAQ Knowledgebase (34 Technical Doubts) -->
  <url>
    <loc>https://r134apressurechart.com/faqs</loc>
    <lastmod>2026-11-02</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
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  <!-- Client-Side Privacy Policy & Disclaimers -->
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    <loc>https://r134apressurechart.com/privacy-policy</loc>
    <lastmod>2026-11-02</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.3</priority>
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