{"id":57073,"date":"2026-09-30T15:25:38","date_gmt":"2026-09-30T15:25:38","guid":{"rendered":"https:\/\/zobai.com\/?p=57073"},"modified":"2026-09-30T16:49:11","modified_gmt":"2026-09-30T16:49:11","slug":"boiler-safety-valve-set-pressure-staging-and-capacity-allocation","status":"publish","type":"post","link":"https:\/\/zobai.com\/ar\/blog\/boiler-safety-valve-set-pressure-staging-and-capacity-allocation\/","title":{"rendered":"\u062a\u0642\u0633\u064a\u0645 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0648\u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u0633\u0639\u0629 \u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0645\u0627\u0646 \u0627\u0644\u063a\u0644\u0627\u064a\u0627\u062a"},"content":{"rendered":"<style>\n.zobai-sv-page{\n  --z-primary:#0f766e;\n  --z-primary-dark:#115e59;\n  --z-accent:#16a085;\n  --z-text:#20262d;\n  --z-muted:#5f6b75;\n  --z-line:#dfe6e8;\n  --z-soft:#f2f8f6;\n  --z-warning:#fff8e7;\n  --z-radius-sm:10px;\n  --z-radius-md:16px;\n  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background:var(--z-primary);\n  color:#fff;\n  font-weight:700;\n  line-height:1.3;\n  text-align:center;\n  text-decoration:none;\n}<\/p>\n<p>.zobai-sv-page .zobai-btn:hover,\n.zobai-sv-page .zobai-btn:focus{\n  background:var(--z-primary-dark);\n  color:#fff;\n}<\/p>\n<p>.zobai-sv-page .zobai-btn:focus-visible{\n  outline:3px solid rgba(15,118,110,.32);\n  outline-offset:3px;\n}<\/p>\n<p>@media (max-width:767px){\n  .zobai-sv-page{\n    padding:0 17px;\n    font-size:16px;\n    line-height:1.68;\n  }<\/p>\n<p>  .zobai-sv-page .zobai-hero{\n    padding-top:20px;\n  }<\/p>\n<p>  .zobai-sv-page h2{\n    margin-top:42px;\n    font-size:clamp(1.45rem,7vw,1.8rem);\n  }<\/p>\n<p>  .zobai-sv-page h3{\n    margin-top:30px;\n    font-size:1.18rem;\n  }<\/p>\n<p>  .zobai-sv-page blockquote{\n    padding:14px 16px;\n  }<\/p>\n<p>  .zobai-sv-page .zobai-table-wrap table{\n    min-width:680px;\n  }<\/p>\n<p>  .zobai-sv-page .zobai-placeholder-box{\n    aspect-ratio:auto;\n    min-height:220px;\n   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\u062b\u0645 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646\u0647\u0627 \u0641\u0642\u0637 \u0628\u062c\u0645\u0639 \u0627\u0644\u0633\u0639\u0627\u062a \u0627\u0644\u0627\u0633\u0645\u064a\u0629. \u064a\u062c\u0628 \u0623\u0646 \u062a\u0628\u062f\u0623 \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0645\u0646 \u0623\u0633\u0627\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062d\u0627\u0643\u0645 \u0644\u0644\u063a\u0644\u0627\u064a\u0629 \u0648\u0648\u0627\u062c\u0628 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0628\u062e\u0627\u0631 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u060c \u062b\u0645 \u062a\u0637\u0628\u064a\u0642 \u062a\u0631\u062a\u064a\u0628 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0627\u0644\u0645\u0633\u0645\u0648\u062d \u0628\u0647 \u0648\u0627\u062d\u062a\u0633\u0627\u0628 \u0643\u0644 \u0635\u0645\u0627\u0645 \u0641\u0642\u0637 \u0639\u0644\u0649 \u0623\u0633\u0627\u0633 \u0633\u0639\u0629 \u0645\u0648\u062b\u0642\u0629 \u0623\u0648 \u0645\u0639\u062a\u0645\u062f\u0629 \u0635\u0627\u0644\u062d\u0629 \u0644\u0630\u0644\u0643 \u0627\u0644\u0635\u0645\u0627\u0645 \u0648\u0636\u063a\u0637 \u0636\u0628\u0637\u0647 \u0648\u0638\u0631\u0648\u0641 \u0627\u0644\u0628\u062e\u0627\u0631 \u0648\u0627\u0644\u0645\u0648\u0642\u0639 \u0627\u0644\u0645\u062d\u0645\u064a.<\/p>\n<p>\u0647\u0630\u0627 \u0627\u0644\u062a\u0645\u064a\u064a\u0632 \u0645\u0647\u0645 \u0644\u0623\u0646 <strong>\u062a\u0631\u062a\u064a\u0628 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0648\u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u0633\u0639\u0629 \u0645\u062a\u0631\u0627\u0628\u0637\u0627\u0646\u060c \u0644\u0643\u0646\u0647\u0645\u0627 \u064a\u0624\u062f\u064a\u0627\u0646 \u0648\u0638\u064a\u0641\u062a\u064a\u0646 \u0645\u062e\u062a\u0644\u0641\u062a\u064a\u0646<\/strong>. \u064a\u062d\u062f\u062f \u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u062c\u0632\u0621\u064b\u0627 \u0645\u0646 \u062a\u0631\u062a\u064a\u0628 \u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0636\u063a\u0637. \u0623\u0645\u0627 \u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u0633\u0639\u0629 \u0641\u064a\u062d\u062f\u062f \u0643\u064a\u0641\u064a\u0629 \u062a\u063a\u0637\u064a\u0629 \u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0641\u0639\u0644\u064a\u064b\u0627. \u0642\u0627\u0626\u0645\u0629 \u0645\u0642\u0646\u0639\u0629 \u0645\u0646 \u0636\u063a\u0648\u0637 \u0627\u0644\u0636\u0628\u0637 \u0644\u0627 \u062a\u062b\u0628\u062a \u0643\u0641\u0627\u064a\u0629 \u0627\u0644\u0633\u0639\u0629\u060c \u0648\u0627\u0644\u0645\u062c\u0645\u0648\u0639 \u0627\u0644\u062d\u0633\u0627\u0628\u064a \u0627\u0644\u0643\u0628\u064a\u0631 \u0644\u0633\u0639\u0627\u062a \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c \u0644\u0627 \u064a\u062b\u0628\u062a \u0623\u0646 \u0627\u0644\u0645\u0633\u0627\u0647\u0645\u0627\u062a \u0627\u0644\u0641\u0631\u062f\u064a\u0629 \u0635\u0627\u0644\u062d\u0629 \u0644\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0645\u0631\u0643\u0628.<\/p>\n<\/p><\/div>\n<aside class=\"zobai-callout\" aria-label=\"Safety and code boundary\">\n<p><strong>\u0627\u0644\u062d\u062f \u0627\u0644\u0647\u0646\u062f\u0633\u064a:<\/strong> \u062a\u0639\u062a\u0645\u062f \u0627\u0644\u0636\u0628\u0637\u0627\u062a \u0627\u0644\u062f\u0642\u064a\u0642\u0629 \u0648\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0633\u0639\u0629 \u0648\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u0642\u0628\u0648\u0644 \u0639\u0644\u0649 \u0625\u0635\u062f\u0627\u0631 \u0643\u0648\u062f \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647 \u0648\u0627\u0644\u0627\u062e\u062a\u0635\u0627\u0635 \u0627\u0644\u0642\u0636\u0627\u0626\u064a \u0648\u062a\u0643\u0648\u064a\u0646 \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0648\u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0645\u0635\u0646\u0639 \u0648\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0645\u0634\u0631\u0648\u0639. \u0644\u0630\u0644\u0643 \u0641\u0625\u0646 \u0627\u0644\u0637\u0631\u064a\u0642\u0629 \u0623\u062f\u0646\u0627\u0647 \u0647\u064a \u0648\u0633\u064a\u0644\u0629 \u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u062c\u062f\u0648\u0644 \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a\u2014\u0648\u0644\u064a\u0633\u062a \u0628\u062f\u064a\u0644\u0627\u064b \u0639\u0646 \u062d\u0633\u0627\u0628 \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u0646\u0647\u0627\u0626\u064a \u0644\u0644\u0645\u0634\u0631\u0648\u0639 \u0623\u0648 \u0627\u0639\u062a\u0645\u0627\u062f\u0647.<\/p>\n<\/aside>\n<section id=\"s01-boiler-pressure-capacity-basis\">\n<h2>\u0623\u0633\u0627\u0633 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0648\u0627\u0644\u0633\u0639\u0629 \u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0645\u0627\u0646 \u0627\u0644\u063a\u0644\u0627\u064a\u0629<\/h2>\n<p>\u0642\u0628\u0644 \u062a\u062e\u0635\u064a\u0635 \u0627\u0644\u0646\u0633\u0628 \u0623\u0648 \u062d\u0635\u0635 \u0627\u0644\u0633\u0639\u0629 \u0644\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u0631\u062f\u064a\u0629\u060c \u062d\u062f\u062f \u0645\u0627 \u064a\u064f\u062a\u0648\u0642\u0639 \u0645\u0646 \u0646\u0638\u0627\u0645 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0643\u0627\u0645\u0644 \u062a\u062d\u0642\u064a\u0642\u0647.<\/p>\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u063a\u0644\u0627\u064a\u0629 \u0628\u062e\u0627\u0631\u064a\u0629\u060c \u064a\u0639\u0646\u064a \u0630\u0644\u0643 \u0639\u0627\u062f\u0629\u064b \u062a\u062d\u062f\u064a\u062f \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0623\u0648 \u0642\u0633\u0645 \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0627\u0644\u0645\u062d\u0645\u064a\u060c \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645 \u0644\u0644\u062d\u0645\u0627\u064a\u0629\u060c \u0648\u0623\u0642\u0635\u0649 \u0648\u0627\u062c\u0628 \u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0628\u062e\u0627\u0631 \u064a\u062c\u0628 \u0627\u0633\u062a\u064a\u0639\u0627\u0628\u0647\u060c \u0648\u0642\u0648\u0627\u0639\u062f \u0627\u0644\u0643\u0648\u062f \u0623\u0648 \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u0627\u0644\u062a\u064a \u062a\u062d\u0643\u0645 \u0627\u0644\u062a\u0631\u062a\u064a\u0628. \u062a\u0646\u062a\u0645\u064a \u0647\u0630\u0647 \u0627\u0644\u0645\u062f\u062e\u0644\u0627\u062a \u0625\u0644\u0649 \u0623\u0639\u0644\u0649 \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0644\u0623\u0646 \u0643\u0644 \u0642\u0631\u0627\u0631 \u0644\u0627\u062d\u0642 \u064a\u0639\u062a\u0645\u062f \u0639\u0644\u064a\u0647\u0627.<\/p>\n<p>\u064a\u062c\u0628 \u0623\u064a\u0636\u064b\u0627 \u0623\u0646 \u062a\u0628\u0642\u0649 \u062d\u0642\u0648\u0644 \u0627\u0644\u0636\u063a\u0637 \u0645\u062a\u0645\u0627\u064a\u0632\u0629. \u0636\u063a\u0637 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0637\u0628\u064a\u0639\u064a \u0644\u064a\u0633 \u0646\u0641\u0633 \u0627\u0644\u0643\u0645\u064a\u0629 \u0645\u062b\u0644 \u0627\u0644\u062d\u062f \u0627\u0644\u0623\u0642\u0635\u0649 \u0644\u0636\u063a\u0637 \u0627\u0644\u0639\u0645\u0644 \u0627\u0644\u0645\u0633\u0645\u0648\u062d \u0628\u0647 \u0623\u0648 \u0623\u064a \u062d\u062f \u062a\u0635\u0645\u064a\u0645\u064a \u062d\u0627\u0643\u0645 \u0622\u062e\u0631. \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0644\u064a\u0633 \u0636\u063a\u0637 \u0627\u0644\u062a\u0646\u0641\u064a\u0633. \u0648\u0644\u0627 \u0623\u064a \u0645\u0646 \u0647\u0630\u0647 \u0627\u0644\u0636\u063a\u0648\u0637 \u0647\u0648 \u0628\u062d\u062f \u0630\u0627\u062a\u0647 \u0642\u064a\u0645\u0629 \u0633\u0639\u0629 \u062a\u0646\u0641\u064a\u0633.<\/p>\n<p>\u064a\u0646\u0637\u0628\u0642 \u0646\u0641\u0633 \u0627\u0644\u0641\u0635\u0644 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0627\u0644\u0633\u0639\u0629. \u0644\u062f\u0649 \u0627\u0644\u063a\u0644\u0627\u064a\u0629 <strong>\u0645\u0639\u062f\u0644 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0645\u0637\u0644\u0648\u0628<\/strong>. \u0644\u0643\u0644 \u0635\u0645\u0627\u0645 <strong>\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0648\u062b\u0642\u0629 \u0623\u0648 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u062a\u062d\u062a \u0638\u0631\u0648\u0641 \u0645\u062d\u062f\u062f\u0629<\/strong>. \u062a\u062a\u0645\u062b\u0644 \u0627\u0644\u0645\u0647\u0645\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u0641\u064a \u0625\u062b\u0628\u0627\u062a \u0623\u0646 \u0627\u0644\u0633\u0639\u0627\u062a \u0627\u0644\u0645\u0639\u062a\u0628\u0631\u0629 \u0628\u0634\u0643\u0644 \u0645\u0634\u0631\u0648\u0639 \u0641\u064a \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0645\u064f\u0646\u0641\u064e\u0651\u0630 \u062a\u0644\u0628\u064a \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0627\u0644\u062d\u0627\u0643\u0645\u0629.<\/p>\n<p>\u0644\u0630\u0644\u0643\u060c \u064a\u062d\u062a\u0648\u064a \u0633\u062c\u0644 \u0627\u0644\u0628\u062f\u0627\u064a\u0629 \u0627\u0644\u0645\u0641\u064a\u062f\u060c \u0643\u062d\u062f \u0623\u062f\u0646\u0649\u060c \u0639\u0644\u0649:<\/p>\n<ul>\n<li>\u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0623\u0648 \u0627\u0644\u0642\u0633\u0645 \u0627\u0644\u0645\u062d\u0645\u064a\u061b;<\/li>\n<li>\u0627\u0644\u0643\u0648\u062f \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u060c \u0648\u0627\u0644\u0637\u0628\u0639\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629\u060c \u0648\u0627\u0644\u0627\u062e\u062a\u0635\u0627\u0635 \u0627\u0644\u0642\u0636\u0627\u0626\u064a\u060c \u0623\u0648 \u0623\u0633\u0627\u0633 \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u062d\u064a\u062b\u0645\u0627 \u0643\u0627\u0646 \u0645\u0639\u0631\u0648\u0641\u064b\u0627\u061b;<\/li>\n<li>\u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062d\u0627\u0643\u0645 \u0623\u0648 MAWP\u061b;<\/li>\n<li>\u0636\u063a\u0637 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0637\u0628\u064a\u0639\u064a \u062d\u064a\u062b\u0645\u0627 \u0643\u0627\u0646 \u0630\u0627 \u0635\u0644\u0629 \u0628\u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629\u061b;<\/li>\n<li>\u0648\u0627\u062c\u0628 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0628\u062e\u0627\u0631 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0623\u0648 \u0623\u0642\u0635\u0649 \u0645\u0639\u062f\u0644 \u062a\u0648\u0644\u064a\u062f \u0628\u062e\u0627\u0631 \u0645\u0633\u062a\u062e\u062f\u0645 \u0641\u064a \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u061b;<\/li>\n<li>\u0645\u0648\u0642\u0639 \u0643\u0644 \u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646\u061b;<\/li>\n<li>\u062a\u062d\u062f\u064a\u062f \u0627\u0644\u0648\u062b\u0627\u0626\u0642 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0644\u062f\u0639\u0645 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0648\u0627\u0644\u0633\u0639\u0629 \u0644\u0643\u0644 \u0635\u0645\u0627\u0645.<\/li>\n<\/ul>\n<p>\u064a\u0645\u0646\u0639 \u0647\u0630\u0627 \u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u062e\u0637\u0623\u064b \u0634\u0627\u0626\u0639\u064b\u0627: \u0627\u0644\u0628\u062f\u0621 \u0628\u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0645\u062a\u0627\u062d\u0629 \u0641\u0639\u0644\u064a\u064b\u0627 \u0648\u0645\u062d\u0627\u0648\u0644\u0629 \u0645\u0637\u0627\u0628\u0642\u0629 \u0633\u0639\u0627\u062a\u0647\u0627 \u0645\u0646 \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c \u0645\u0639 \u0648\u0627\u062c\u0628 \u0645\u0637\u0644\u0648\u0628 \u0644\u0645 \u064a\u064f\u062d\u062f\u064e\u0651\u062f \u0628\u0648\u0636\u0648\u062d \u0628\u0639\u062f.<\/p>\n<h3>\u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0644\u064a\u0633 \u0645\u0639\u062f\u0644 \u062a\u062f\u0641\u0642 \u0627\u0644\u0628\u062e\u0627\u0631 \u0627\u0644\u0637\u0628\u064a\u0639\u064a<\/h3>\n<p>\u0642\u062f \u062a\u0642\u0636\u064a \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0645\u0639\u0638\u0645 \u0639\u0645\u0631\u0647\u0627 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\u064a \u062f\u0648\u0646 \u062d\u0627\u0644\u0629 \u062a\u0648\u0644\u064a\u062f \u0627\u0644\u0628\u062e\u0627\u0631 \u0627\u0644\u0642\u0635\u0648\u0649. \u0648\u0647\u0630\u0627 \u0644\u0627 \u064a\u062c\u0639\u0644 \u0645\u0639\u062f\u0644 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\u064a \u0627\u0644\u0639\u0627\u062f\u064a \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0644\u0642\u0627\u0626\u064a \u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f.<\/p>\n<p>\u064a\u062c\u0628 \u0623\u0646 \u062a\u064f\u0633\u062a\u0645\u062f \u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0645\u0646 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0627\u0644\u062d\u0627\u0643\u0645 \u0648\u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u0643\u0648\u062f\u064a. \u0648\u0648\u0641\u0642\u064b\u0627 \u0644\u0644\u0642\u0648\u0627\u0639\u062f \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u0627\u060c \u0642\u062f \u064a\u0631\u062a\u0628\u0637 \u0647\u0630\u0627 \u0627\u0644\u0623\u0633\u0627\u0633 \u0628\u0623\u0642\u0635\u0649 \u0642\u062f\u0631\u0629 \u0639\u0644\u0649 \u062a\u0648\u0644\u064a\u062f \u0627\u0644\u0628\u062e\u0627\u0631 \u0623\u0648 \u0627\u0644\u062a\u0628\u062e\u064a\u0631\u060c \u0623\u0648 \u0645\u062f\u062e\u0644\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0623\u0648 \u0637\u0631\u064a\u0642\u0629 \u0645\u0639\u062a\u0645\u062f\u0629 \u0623\u062e\u0631\u0649. \u0648\u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u0623\u064a \u0637\u0631\u064a\u0642\u0629 \u0628\u0645\u0641\u0631\u062f\u0647\u0627 \u0643\u0635\u064a\u063a\u0629 \u0639\u0627\u0644\u0645\u064a\u0629\u060c \u0644\u0623\u0646 \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u062d\u0627\u0643\u0645 \u0648\u0628\u0646\u0627\u0621 \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0644\u0645 \u064a\u064f\u062b\u0628\u064e\u0651\u062a\u0627 \u0644\u0643\u0644 \u0642\u0627\u0631\u0626.<\/p>\n<p>\u0627\u0644\u0642\u0627\u0639\u062f\u0629 \u0627\u0644\u0639\u0645\u0644\u064a\u0629 \u0623\u0628\u0633\u0637: <strong>\u062d\u062f\u0650\u0651\u062f \u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0623\u0648\u0644\u064b\u0627\u060c \u062b\u0645 \u0642\u0627\u0631\u0646 \u062a\u0631\u062a\u064a\u0628 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0628\u0647.<\/strong><\/p>\n<aside class=\"zobai-related-link\" aria-label=\"Related standards guide\">\n<p>\u0644\u0633\u064a\u0627\u0642 \u0623\u0648\u0633\u0639 \u062d\u0648\u0644 \u0645\u0646\u0638\u0648\u0645\u0629 \u0627\u0644\u0623\u0643\u0648\u0627\u062f\u060c \u0631\u0627\u062c\u0639 <a href=\"https:\/\/zobai.com\/ar\/standards\/asme-safety-valve-standards\/\">\u0645\u0639\u0627\u064a\u064a\u0631 \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646 ASME<\/a>.<\/p>\n<\/aside>\n<\/section>\n<section id=\"s02-set-pressure-staging\">\n<h2>\u0636\u0628\u0637 \u0636\u063a\u0648\u0637 \u0627\u0644\u0645\u0631\u0627\u062d\u0644 \u062f\u0648\u0646 \u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0641\u062a\u062d \u0643\u0625\u062b\u0628\u0627\u062a \u0644\u0644\u0633\u0639\u0629<\/h2>\n<p>\u0639\u0646\u062f\u0645\u0627 \u062a\u062d\u0645\u064a \u0639\u062f\u0629 \u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0645\u0627\u0646 \u0646\u0638\u0627\u0645 \u0627\u0644\u063a\u0644\u0627\u064a\u0629 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\u064a\u0646\u0628\u063a\u064a \u0641\u0635\u0644 \u0631\u0642\u0645 \u0627\u0644\u0633\u0639\u0629 \u0639\u0646 \u0623\u0633\u0627\u0633 \u0627\u0644\u0636\u0628\u0637 \u0648\u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0627\u0644\u0630\u064a \u064a\u062f\u0639\u0645\u0647.<\/p>\n<\/section>\n<section id=\"s03-capacity-allocation\">\n<h2>\u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u0633\u0639\u0629 \u0635\u0645\u0627\u0645\u064b\u0627 \u0628\u0635\u0645\u0627\u0645 \u0639\u0644\u0649 \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u0635\u062d\u064a\u062d<\/h2>\n<p>\u0628\u0639\u062f \u062a\u062d\u062f\u064a\u062f \u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0644\u0644\u063a\u0644\u0627\u064a\u0629 \u0648\u062a\u0631\u062a\u064a\u0628 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0627\u0644\u0645\u0633\u0645\u0648\u062d \u0628\u0647\u060c \u064a\u0645\u0643\u0646 \u0644\u0644\u0645\u0647\u0646\u062f\u0633 \u0627\u0644\u0627\u0646\u062a\u0642\u0627\u0644 \u0625\u0644\u0649 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u062e\u0635\u0635\u0629 \u0644\u0643\u0644 \u0635\u0645\u0627\u0645.<\/p>\n<p>\u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u0623\u0648\u0644 \u0644\u064a\u0633 \u201c\u0645\u0627 \u0627\u0644\u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0626\u0648\u064a\u0629 \u0627\u0644\u062a\u064a \u064a\u062c\u0628 \u0623\u0646 \u064a\u062d\u0645\u0644\u0647\u0627 \u0643\u0644 \u0635\u0645\u0627\u0645\u061f\u201d \u0628\u0644:<\/p>\n<blockquote>\n<p><strong>\u0645\u0627 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u062a\u064a \u064a\u0645\u0643\u0646 \u0644\u0647\u0630\u0627 \u0627\u0644\u0635\u0645\u0627\u0645 \u062a\u062d\u062f\u064a\u062f\u064b\u0627 \u0623\u0646 \u064a\u0633\u0627\u0647\u0645 \u0628\u0647\u0627 \u0628\u0634\u0643\u0644 \u0645\u0634\u0631\u0648\u0639 \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0645\u062d\u0645\u064a \u062a\u062d\u062f\u064a\u062f\u064b\u0627\u061f<\/strong><\/p>\n<\/blockquote>\n<p>\u064a\u062d\u062a\u0627\u062c \u0647\u0630\u0627 \u0627\u0644\u0625\u0633\u0647\u0627\u0645 \u0625\u0644\u0649 \u0623\u0633\u0627\u0633 \u0642\u0627\u0628\u0644 \u0644\u0644\u062a\u062d\u062f\u064a\u062f.<\/p>\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0645\u0627\u0646 \u0627\u0644\u0628\u062e\u0627\u0631\u060c \u064a\u0645\u0643\u0646 \u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0627\u0644\u0645\u0639\u062a\u0631\u0641 \u0628\u0647\u0627 \u0631\u0628\u0637 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0628\u0639\u0648\u0627\u0645\u0644 \u0645\u062b\u0644 \u0647\u0648\u064a\u0629 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0635\u0645\u0627\u0645\u060c \u0648\u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0627\u0644\u0645\u0639\u0644\u064e\u0651\u0645 \u0623\u0648 \u0646\u0637\u0627\u0642 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0627\u0644\u0635\u0627\u0644\u062d\u060c \u0648\u0631\u0645\u0632 \u0627\u0644\u0643\u0648\u062f\u060c \u0648\u062d\u0627\u0644\u0629 \u0627\u0644\u0628\u062e\u0627\u0631\u060c \u0648\u0645\u0633\u0627\u062d\u0629 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0641\u0639\u0644\u064a\u0629\u060c \u0648\u0623\u0633\u0627\u0633 \u0636\u063a\u0637 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645 \u0644\u0644\u0627\u0639\u062a\u0645\u0627\u062f. \u0648\u062a\u064f\u0639\u062f \u0648\u062b\u0627\u0626\u0642 National Board NB-18 \u0645\u062b\u0627\u0644\u064b\u0627 \u0645\u0641\u064a\u062f\u064b\u0627 \u0639\u0644\u0649 \u0623\u0646 \u0627\u0644\u0633\u0639\u0629 \u0644\u064a\u0633\u062a \u0642\u064a\u0645\u0629 \u0643\u062a\u0627\u0644\u0648\u062c\u064a\u0629 \u0642\u0627\u0626\u0645\u0629 \u0628\u0630\u0627\u062a\u0647\u0627: \u0641\u0645\u0646\u0647\u062c\u064a\u0629 \u0633\u0639\u0629 \u0627\u0644\u0628\u062e\u0627\u0631 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u062a\u0631\u0628\u0637 \u0627\u0644\u0633\u0639\u0629 \u0635\u0631\u0627\u062d\u0629\u064b \u0628\u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0627\u0644\u0645\u0639\u0644\u064e\u0651\u0645\u060c \u0648\u0636\u063a\u0637 \u0627\u0644\u062a\u0646\u0641\u064a\u0633\u060c \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u0643\u0648\u062f\u060c \u0648\u062d\u0627\u0644\u0629 \u0627\u0644\u0628\u062e\u0627\u0631.<\/p>\n<p>\u0648\u0647\u0630\u0627 \u064a\u0646\u0634\u0626 \u062a\u0633\u0644\u0633\u0644 \u0645\u0631\u0627\u062c\u0639\u0629 \u0645\u0647\u0645\u064b\u0627:<\/p>\n<ol>\n<li>\u062a\u062d\u062f\u064a\u062f \u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0644\u0644\u063a\u0644\u0627\u064a\u0629\u061b;<\/li>\n<li>identify each valve;<\/li>\n<li>confirm the valve&#8217;s set pressure;<\/li>\n<li>identify the applicable capacity document or certification basis;<\/li>\n<li>confirm that the documented capacity applies to the relevant steam and pressure conditions;<\/li>\n<li>determine whether that capacity is creditable in the installed location;<\/li>\n<li>only then aggregate the allowed contributions.<\/li>\n<\/ol>\n<aside class=\"zobai-related-link\" aria-label=\"Related capacity guide\">\n<p>For the broader sizing method behind required duty, flow area, and capacity evidence, review <a href=\"https:\/\/zobai.com\/ar\/blog\/safety-valve-sizing-and-certified-relieving-capacity-guide\/\">\u062d\u0633\u0627\u0628 \u0645\u0642\u0627\u0633\u0627\u062a \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646 \u0648\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629<\/a>.<\/p>\n<\/aside>\n<h3>Capacity arithmetic is not capacity proof<\/h3>\n<p>Suppose a schedule contains three valves with three capacity values. Adding the three numbers is mathematically easy. The engineering question is whether the three numbers are <strong>comparable and creditable<\/strong>.<\/p>\n<p>A valve capacity taken from a different set-pressure condition, a different certified design, or a different steam condition cannot automatically be carried into the current schedule. The same caution applies when a number comes from a broad product-family table rather than documentation for the actual valve design.<\/p>\n<p>The distinction can be summarized this way:<\/p>\n<div class=\"zobai-table-wrap\" role=\"region\" aria-label=\"Capacity evidence distinctions\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Schedule item<\/th>\n<th scope=\"col\">\u0645\u0627 \u064a\u0645\u0643\u0646\u0647 \u062a\u0623\u0633\u064a\u0633\u0647<\/th>\n<th scope=\"col\">\u0645\u0627 \u0644\u0627 \u064a\u062d\u062f\u062f\u0647 \u0628\u062d\u062f \u0630\u0627\u062a\u0647<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637<\/td>\n<td>Intended pressure setting for the valve<\/td>\n<td>\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633<\/td>\n<\/tr>\n<tr>\n<td>\u062d\u062c\u0645 \u0648\u0635\u0644\u0629 \u0627\u0644\u0645\u062f\u062e\u0644 \/ \u0627\u0644\u0645\u062e\u0631\u062c<\/td>\n<td>Physical interface identity<\/td>\n<td>Flow area or certified capacity<\/td>\n<\/tr>\n<tr>\n<td>Orifice or flow-area designation<\/td>\n<td>Part of flow-path identity where applicable<\/td>\n<td>Certified capacity under every condition<\/td>\n<\/tr>\n<tr>\n<td>\u0633\u062c\u0644 \u0645\u0639\u0627\u064a\u0631\u0629 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637<\/td>\n<td>Evidence about setting\/test status<\/td>\n<td>Required boiler duty or certified capacity<\/td>\n<\/tr>\n<tr>\n<td>Certified\/documented capacity record<\/td>\n<td>Capacity under its stated basis and conditions<\/td>\n<td>Suitability for every installation or project<\/td>\n<\/tr>\n<tr>\n<td>Arithmetic sum of several capacities<\/td>\n<td>Numerical total<\/td>\n<td>Whether all contributions may legally and technically be credited<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>That is why \u201ctwo valves at 50% each\u201d or \u201cthree valves sharing the duty equally\u201d should never be the starting assumption unless the governing design and verified valve data support that allocation.<\/p>\n<p>Unequal allocations can also be technically plausible in a multi-valve arrangement, but they should not be treated as a universal rule. The acceptable distribution depends on the governing boiler requirements and on which individual valve capacities can actually be credited.<\/p>\n<h3>Calibration and capacity certification are different evidence<\/h3>\n<p>A valve can have a valid set-pressure test record without that record proving that the valve provides the steam capacity required by the boiler.<\/p>\n<p>Set-pressure testing answers a setting or operational-test question. Capacity certification answers a flow-performance question under a defined certification basis. A complete boiler schedule often needs both kinds of evidence, but they are not interchangeable.<\/p>\n<p>This distinction becomes especially important during maintenance and replacement. Restoring a valve to the same nominal set pressure does not automatically demonstrate that a replacement valve has the same certified capacity, the same flow area, the same applicable code designator, or the same suitability for the protected location.<\/p>\n<figure class=\"zobai-figure\" data-image-status=\"complete\" data-upload-status=\"final-upload-verified\" data-image-slot=\"image-01-boiler-pressure-capacity-relationship\">\n  <img loading=\"lazy\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/boiler-safety-valve-set-pressure-capacity-allocation.webp\" alt=\"\u0627\u0644\u0639\u0644\u0627\u0642\u0629 \u0627\u0644\u0645\u0641\u0627\u0647\u064a\u0645\u064a\u0629 \u0628\u064a\u0646 \u062a\u062f\u0631\u062c \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0645\u0627\u0646 \u0627\u0644\u063a\u0644\u0627\u064a\u0627\u062a\u060c \u0648\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0648\u062b\u0642\u0629 \u0644\u0643\u0644 \u0635\u0645\u0627\u0645\u060c \u0648\u0645\u0648\u0642\u0639 \u0627\u0644\u0645\u0639\u062f\u0629 \u0627\u0644\u0645\u062d\u0645\u064a\u0629.\" title=\"Boiler Safety Valve Set Pressure Staging and Capacity Allocation - Engineering Diagram 1\" width=\"1200\" height=\"900\" class=\"wp-image-57096\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/boiler-safety-valve-set-pressure-capacity-allocation.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/boiler-safety-valve-set-pressure-capacity-allocation-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/boiler-safety-valve-set-pressure-capacity-allocation-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/boiler-safety-valve-set-pressure-capacity-allocation-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/boiler-safety-valve-set-pressure-capacity-allocation-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/boiler-safety-valve-set-pressure-capacity-allocation-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>Set-pressure staging controls opening thresholds, while documented capacity must be credited valve by valve and may depend on the protected location.<\/figcaption><\/figure>\n<\/section>\n<section id=\"s04-location-capacity-credit\">\n<h2>When Valve Location Changes What Capacity Can Be Credited<\/h2>\n<p>A second major error is to treat every safety valve physically associated with a boiler as though all capacity were available in one unrestricted pool.<\/p>\n<p>That assumption may fail when different valves protect different parts of the boiler.<\/p>\n<p>A drum-mounted valve and a valve protecting a superheater, for example, can have different pressure or capacity responsibilities under the applicable boiler rules. Some regulated boiler frameworks explicitly treat the drum and superheater separately while still relating their capacities to an overall boiler generating-capacity requirement.<\/p>\n<p>The exact allocation rule is not universal, so this article does not assign a generic drum\/superheater percentage. Instead, the engineer should ask two questions:<\/p>\n<ol>\n<li><strong>What total relieving duty must the complete boiler protection arrangement satisfy?<\/strong><\/li>\n<li><strong>Does the governing code impose a separate local protection or capacity requirement at this valve&#8217;s installed location?<\/strong><\/li>\n<\/ol>\n<p>Both questions matter.<\/p>\n<p>A total capacity sum may appear adequate while a specific protected section is inadequately covered. Conversely, a valve that provides essential local protection may be creditable toward the total requirement only under defined conditions.<\/p>\n<h3>A representative review scenario<\/h3>\n<p>Consider a boiler with two safety valves on the main pressure-containing section and another valve associated with a superheater.<\/p>\n<p>The wrong review method is:<\/p>\n<blockquote>\n<p>Add all three catalog capacities and compare the result with one boiler capacity number.<\/p>\n<\/blockquote>\n<p>The more defensible review is:<\/p>\n<ul>\n<li>\u062a\u062d\u062f\u064a\u062f \u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0644\u0644\u063a\u0644\u0627\u064a\u0629\u061b;<\/li>\n<li>identify which section each valve protects;<\/li>\n<li>verify the permitted setting relationship for those locations;<\/li>\n<li>identify the documented capacity basis for each valve;<\/li>\n<li>determine whether the governing rules allow each capacity to contribute to the overall requirement;<\/li>\n<li>verify any location-specific minimum or separate protection responsibility;<\/li>\n<li>then assess the combined schedule.<\/li>\n<\/ul>\n<p>No numerical values are needed to understand the logic. The purpose of the scenario is to show why <strong>location is an engineering variable in capacity allocation<\/strong>, not merely a line in an equipment list.<\/p>\n<p>It also explains why changing the location of a valve\u2014or replacing a valve at one location with a superficially similar device\u2014can require more than checking the flange size and set pressure.<\/p>\n<\/section>\n<section id=\"s05-valve-by-valve-verification\">\n<h2>Verify the Final Arrangement With a Valve-by-Valve Schedule<\/h2>\n<p>The final review should make the evidence visible valve by valve.<\/p>\n<p>A useful schedule does more than list tags, sizes, and set pressures. It should allow an engineer, inspector, or supplier to trace how each valve contributes to the protection basis and where a conclusion still depends on missing project data.<\/p>\n<p>A practical structure is:<\/p>\n<div class=\"zobai-table-wrap\" role=\"region\" aria-label=\"Valve-by-valve verification schedule\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Review field<\/th>\n<th scope=\"col\">What to record<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Valve ID<\/td>\n<td>Unique tag or existing-valve identifier<\/td>\n<\/tr>\n<tr>\n<td>Protected location<\/td>\n<td>Drum, superheater, or other clearly defined protected section<\/td>\n<\/tr>\n<tr>\n<td>Governing pressure basis<\/td>\n<td>MAWP or other applicable approved basis<\/td>\n<\/tr>\n<tr>\n<td>\u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637<\/td>\n<td>Proposed or existing marked setting<\/td>\n<\/tr>\n<tr>\n<td>Required \/ allocated duty<\/td>\n<td>Portion of the governing duty being checked against this valve, where the design uses an allocation<\/td>\n<\/tr>\n<tr>\n<td>Capacity source<\/td>\n<td>Certified capacity listing, manufacturer documentation, approved calculation, or other applicable basis<\/td>\n<\/tr>\n<tr>\n<td>Capacity conditions<\/td>\n<td>Relevant set pressure, relieving-pressure basis, steam condition, and design identity<\/td>\n<\/tr>\n<tr>\n<td>Credited capacity<\/td>\n<td>Capacity actually accepted for the schedule\u2014not simply a catalog maximum<\/td>\n<\/tr>\n<tr>\n<td>Local protection requirement<\/td>\n<td>Any separate requirement associated with the installed location<\/td>\n<\/tr>\n<tr>\n<td>Code \/ project basis<\/td>\n<td>Standard, jurisdiction, project specification, or design reference<\/td>\n<\/tr>\n<tr>\n<td>Supporting record<\/td>\n<td>Datasheet, certification record, nameplate information, test\/calibration record, or calculation reference<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u062d\u0627\u0644\u0629<\/td>\n<td>Verified \/ conditional \/ confirmation required<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>The value of this table is not administrative neatness. It forces the reviewer to distinguish three states:<\/p>\n<ul class=\"zobai-status-list\">\n<li><strong>Proven.<\/strong> The capacity or pressure setting has an applicable, traceable basis.<\/li>\n<li><strong>Conditional.<\/strong> The engineering relationship is understood, but final credit depends on a code edition, project rule, operating condition, or product document that still needs confirmation.<\/li>\n<li><strong>Unresolved.<\/strong> The schedule contains a nominal value, but the evidence needed to rely on it has not been identified.<\/li>\n<\/ul>\n<p>That distinction is more useful than a table in which every field is filled but the source and applicability of the numbers are unclear.<\/p>\n<h3>Recheck the whole relationship after a meaningful change<\/h3>\n<p>A boiler safety-valve schedule should not be treated as permanently valid simply because the valves remain physically installed.<\/p>\n<p>If the required steam-generating duty is increased, the required relieving capacity can change. If one valve is replaced, its design identity or documented capacity basis can change. If a set pressure changes, the pressure\/capacity relationship may need to be reconfirmed. If a valve moves to another protected location, location-specific credit can change.<\/p>\n<p>The precise regulatory consequence of each modification depends on the governing jurisdiction and project requirements. But from an engineering-review standpoint, any change that alters a basis on which the existing schedule credits protection should trigger a check of that basis.<\/p>\n<p>For a replacement valve, do not reduce the comparison to \u201csame connection and same set pressure.\u201d A defensible review may also need to compare:<\/p>\n<ul>\n<li>valve design or certified design identity;<\/li>\n<li>set-pressure range;<\/li>\n<li>documented steam capacity;<\/li>\n<li>applicable capacity\/certification basis;<\/li>\n<li>flow-area or orifice identity where relevant;<\/li>\n<li>protected location;<\/li>\n<li>installation and back-pressure conditions where they affect applicability;<\/li>\n<li>code, project, and documentation requirements.<\/li>\n<\/ul>\n<p>Matching only one or two nominal fields is identification evidence\u2014not proof of full interchangeability.<\/p>\n<\/section>\n<section id=\"s06-protection-schedule-conclusion\">\n<h2>From a Staged Valve List to a Defensible Protection Schedule<\/h2>\n<p>Set-pressure staging and capacity allocation should end in one coordinated engineering record.<\/p>\n<p>The pressure side of that record answers: <strong>Are the valve settings permitted for this boiler and pressure basis?<\/strong><\/p>\n<p>The capacity side answers: <strong>Does each credited valve capacity have an applicable technical basis, and does the permitted combination satisfy the required relieving duty?<\/strong><\/p>\n<p>The location check answers: <strong>Is the capacity available where the governing protection requirement needs it?<\/strong><\/p>\n<p>The documentation check answers: <strong>Can each important value be traced to the code, calculation, certification record, manufacturer document, or test record that actually supports it?<\/strong><\/p>\n<p>When those questions are answered together, a multi-valve schedule becomes more than a list of set points and capacities. It becomes a reviewable protection argument.<\/p>\n<p>If any of those bases are still unknown, they should remain visible as confirmation items rather than being replaced by a generic percentage or assumed catalog value.<\/p>\n<h3>Prepare the data before requesting an engineering review<\/h3>\n<p>For a project-specific review, provide the boiler type and protected sections, applicable code or jurisdiction if known, MAWP or other governing pressure basis, normal operating pressure, required steam-relieving duty or calculation basis, each valve location and set pressure, and the documentation supporting each valve&#8217;s capacity.<\/p>\n<p>For an existing installation or replacement, also provide the available valve nameplate, datasheet, certification\/capacity records, and information about any boiler-duty or configuration change.<\/p>\n<p>The objective is not to choose a valve from the article alone. It is to give the responsible engineer and valve supplier enough information to determine whether the proposed settings and capacities form one coherent, defensible protection arrangement.<\/p>\n<\/section>\n<aside class=\"zobai-cta\" aria-label=\"\u0645\u0631\u0627\u062c\u0639\u0629 \u0647\u0646\u062f\u0633\u064a\u0629\">\n    <strong>Review Your Boiler Safety-Valve Schedule<\/strong><\/p>\n<p>Send the boiler type and protected sections, governing pressure basis, required steam-relieving duty, valve locations and set pressures, and the available capacity documentation. ZOBAI can use those inputs to review the safety-valve requirement and identify what still needs project or product confirmation.<\/p>\n<p>    <a class=\"zobai-btn\" href=\"https:\/\/zobai.com\/ar\/ask-an-engineer\/\">\u0627\u0633\u0623\u0644 \u0645\u0647\u0646\u062f\u0633 \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646<\/a><br \/>\n  <\/aside>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>\u0631\u0627\u062c\u0639 \u0643\u064a\u0641\u064a\u0629 \u062a\u0631\u062a\u064a\u0628 \u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0645\u0627\u0646 \u0627\u0644\u063a\u0644\u0627\u064a\u0629 \u0627\u0644\u0645\u062a\u0639\u062f\u062f\u0629 \u062d\u0633\u0628 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0648\u0643\u064a\u0641 \u062a\u0624\u062b\u0631 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0648\u062b\u0642\u0629 \u0648\u0627\u0644\u0645\u0648\u0642\u0639 \u0627\u0644\u0645\u062d\u0645\u064a \u0648\u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u062a\u062d\u0642\u0642 \u0641\u064a \u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u0633\u0639\u0629.<\/p>","protected":false},"author":2,"featured_media":57096,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74],"tags":[],"class_list":["post-57073","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sizing-performance-engineering"],"_links":{"self":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/57073","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/comments?post=57073"}],"version-history":[{"count":3,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/57073\/revisions"}],"predecessor-version":[{"id":57124,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/57073\/revisions\/57124"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media\/57096"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media?parent=57073"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/categories?post=57073"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/tags?post=57073"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}