{"id":56665,"date":"2026-08-30T10:29:31","date_gmt":"2026-08-30T10:29:31","guid":{"rendered":"https:\/\/zobai.com\/?p=56665"},"modified":"2026-09-01T04:23:28","modified_gmt":"2026-09-01T04:23:28","slug":"cryogenic-safety-valve-selection-for-lng-service","status":"publish","type":"post","link":"https:\/\/zobai.com\/ar\/blog\/cryogenic-safety-valve-selection-for-lng-service\/","title":{"rendered":"\u0627\u062e\u062a\u064a\u0627\u0631 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0644\u0644\u062e\u062f\u0645\u0627\u062a \u0627\u0644\u0645\u0628\u0631\u062f\u0629 \u0644\u063a\u0627\u0632 LNG"},"content":{"rendered":"
\n

Selecting a cryogenic safety valve for LNG service should begin only after the relief basis is defined well enough to support candidate screening. If the governing relief duty or relieving phase is still unresolved, the correct selection decision is \u062a\u0639\u0644\u064a\u0642<\/strong>, \u060c \u0648\u0644\u064a\u0633 \u0646\u0648\u0639\u064b\u0627 \u0645\u0641\u062a\u0631\u0636\u064b\u0627 \u0644\u0644\u0635\u0645\u0627\u0645.<\/p>\n

\u064a\u062a\u0646\u0627\u0648\u0644 \u0647\u0630\u0627 \u0627\u0644\u062f\u0644\u064a\u0644 \u0627\u0644\u062e\u0637\u0648\u0629 \u0627\u0644\u062a\u0627\u0644\u064a\u0629: \u0641\u062d\u0635 \u0645\u0631\u0634\u062d \u0635\u0645\u0627\u0645 \u0645\u0642\u0627\u0628\u0644 \u0648\u0627\u062c\u0628 \u062a\u0646\u0641\u064a\u0633 LNG \u0645\u062d\u062f\u062f \u0645\u0633\u0628\u0642\u064b\u0627. \u0644\u0627 \u064a\u0642\u0648\u0645 \u0628\u062d\u0633\u0627\u0628 \u062d\u0645\u0648\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0623\u0648 \u062d\u062c\u0645 \u0627\u0644\u0635\u0645\u0627\u0645. \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0630\u0644\u0643\u060c \u064a\u062a\u062d\u0642\u0642 \u0645\u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0639\u0627\u0626\u0644\u0629 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0645\u0631\u0634\u062d\u060c \u0648\u0627\u0644\u0628\u0646\u0627\u0621 \u0644\u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0645\u0646\u062e\u0641\u0636\u0629\u060c \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u0645\u0642\u0639\u062f \u0648\u0627\u0644\u062a\u0633\u0631\u0628\u060c \u0648\u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062d\u0631\u0627\u0631\u064a\u060c \u0648\u0638\u0631\u0648\u0641 \u0627\u0644\u0645\u062e\u0631\u062c\u060c \u0648\u0627\u0644\u0648\u062b\u0627\u0626\u0642 \u0627\u0644\u062f\u0627\u0639\u0645\u0629 \u0645\u062a\u0648\u0627\u0641\u0642\u0629 \u0628\u0645\u0627 \u064a\u0643\u0641\u064a \u0644\u0644\u0645\u062a\u0627\u0628\u0639\u0629 \u0625\u0644\u0649 \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u0648\u0637\u0644\u0628 \u0639\u0631\u0636 \u0627\u0644\u0633\u0639\u0631.<\/p>\n

\n

\u0647\u0644 \u0623\u0646\u062a \u0645\u0633\u062a\u0639\u062f \u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646 \u0645\u0628\u0631\u062f \u0644\u062e\u062f\u0645\u0629 LNG\u061f<\/h2>\n

\u0623\u0646\u062a \u0645\u0633\u062a\u0639\u062f \u0644\u0645\u0642\u0627\u0631\u0646\u0629 \u0645\u0631\u0634\u062d\u064a \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0641\u0642\u0637 \u0639\u0646\u062f\u0645\u0627 \u064a\u0643\u0648\u0646 \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0639\u0644\u0648\u064a \u0645\u062d\u062f\u062f\u064b\u0627 \u062c\u064a\u062f\u064b\u0627 \u0628\u0645\u0627 \u064a\u0643\u0641\u064a \u0644\u0648\u0635\u0641 \u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0642\u062f\u0645 \u0625\u0644\u0649 \u0627\u0644\u0635\u0645\u0627\u0645. \u0627\u0644\u0645\u0646\u062a\u062c \u0627\u0644\u0645\u0648\u0635\u0648\u0641 \u0628\u0623\u0646\u0647 \u0645\u0646\u0627\u0633\u0628 \u0644\u062e\u062f\u0645\u0629 LNG \u0623\u0648 \u0627\u0644\u062e\u062f\u0645\u0629 \u0627\u0644\u0645\u0628\u0631\u062f\u0629 \u0644\u0627 \u064a\u0646\u0634\u0626 \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0647\u0630\u0627. \u0645\u0644\u0627\u0621\u0645\u0629 \u0627\u0644\u0645\u0646\u062a\u062c \u0648\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0646\u0638\u0627\u0645 \u0647\u0645\u0627 \u0633\u0624\u0627\u0644\u0627\u0646 \u0647\u0646\u062f\u0633\u064a\u0627\u0646 \u0645\u0631\u062a\u0628\u0637\u0627\u0646\u060c \u0644\u0643\u0646\u0647\u0645\u0627 \u0644\u064a\u0633\u0627 \u0646\u0641\u0633 \u0627\u0644\u0633\u0624\u0627\u0644.<\/p>\n

\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u062c\u0628 \u0623\u0646 \u064a\u0643\u0648\u0646 \u0645\u062d\u062f\u062f\u064b\u0627 \u0645\u0633\u0628\u0642\u064b\u0627\u061f<\/h3>\n

\u062a\u062a\u0637\u0644\u0628 \u0639\u0645\u0644\u064a\u0629 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u062a\u062d\u062f\u064a\u062f \u0648\u0627\u062c\u0628 \u062d\u0645\u0627\u064a\u0629 \u0645\u062d\u062f\u062f\u060c \u0648\u062d\u0627\u0644\u0629 \u062a\u0646\u0641\u064a\u0633 \u062d\u0627\u0643\u0645\u0629\u060c \u0648\u0648\u0627\u062c\u0628 \u062a\u0646\u0641\u064a\u0633 \u0645\u0637\u0644\u0648\u0628 \u0645\u062d\u062f\u062f \u0645\u0646 \u062a\u062d\u0644\u064a\u0644 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0623\u0648\u0644\u064a. \u064a\u064f\u062f\u062e\u0644 \u0647\u0630\u0627 \u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0625\u0644\u0649 \u0647\u0630\u0627 \u0627\u0644\u062f\u0644\u064a\u0644 \u0643\u0645\u062f\u062e\u0644\u061b \u0648\u0644\u0627 \u064a\u064f\u0639\u0627\u062f \u062d\u0633\u0627\u0628\u0647 \u0647\u0646\u0627. \u064a\u062c\u0628 \u0623\u064a\u0636\u064b\u0627 \u0623\u0646 \u064a\u0643\u0648\u0646 \u0648\u0633\u064a\u0637 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0637\u0648\u0631\u0647 \u0648\u0627\u0636\u062d\u064a\u0646 \u0628\u0645\u0627 \u064a\u0643\u0641\u064a \u0644\u062a\u062d\u062f\u064a\u062f \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u0631\u0634\u062d\u0629 \u062a\u0646\u0637\u0628\u0642 \u0639\u0644\u0649 \u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0642\u0635\u0648\u062f.<\/p>\n

\u0644\u0630\u0644\u0643 \u062a\u0633\u0623\u0644 \u0628\u0648\u0627\u0628\u0629 \u0627\u0644\u062c\u0627\u0647\u0632\u064a\u0629 \u0639\u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0646\u0627\u0636\u062c\u064b\u0627 \u0628\u0645\u0627 \u064a\u0643\u0641\u064a \u0644\u0641\u062d\u0635 \u0645\u0643\u0648\u0651\u0646. \u0648\u0647\u064a \u0644\u0627 \u062a\u0634\u0647\u062f \u0639\u0644\u0649 \u0627\u0643\u062a\u0645\u0627\u0644 \u062d\u0633\u0627\u0628 \u0627\u0644\u0645\u0642\u0627\u0633\u0627\u062a \u0623\u0648 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0646\u0638\u0627\u0645 \u0623\u0648 \u0627\u0644\u0645\u0648\u0627\u0641\u0642\u0629 \u0627\u0644\u0646\u0647\u0627\u0626\u064a\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0634\u0631\u0648\u0639.<\/p>\n

\n\n\n\n\n\n\n\n\n
\u0633\u0624\u0627\u0644 \u0627\u0644\u062c\u0627\u0647\u0632\u064a\u0629<\/th>\n\u0627\u0633\u062a\u062c\u0627\u0628\u0629 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631<\/th>\n<\/tr>\n<\/thead>\n
\u0647\u0644 \u0648\u0627\u062c\u0628 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062d\u0627\u0643\u0645 \u0645\u062d\u062f\u062f\u0627\u0646\u061f<\/td>\n\u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u0646\u0639\u0645\u060c \u062a\u0627\u0628\u0639. \u0625\u0630\u0627 \u0644\u0645 \u064a\u0643\u0646 \u0643\u0630\u0644\u0643\u060c \u062a\u0648\u0642\u0641 \u0648\u0627\u0631\u062c\u0639 \u0625\u0644\u0649 \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0623\u0648\u0644\u064a.<\/td>\n<\/tr>\n
\u0647\u0644 \u062a\u0645 \u062a\u062d\u062f\u064a\u062f \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0645\u0633\u0628\u0642\u064b\u0627 \u0645\u0646 \u0627\u0644\u062c\u0647\u0629 \u0627\u0644\u0639\u0644\u064a\u0627\u061f<\/td>\n\u0642\u0645 \u0628\u062a\u0645\u0631\u064a\u0631\u0647\u0627 \u0643\u0645\u062f\u062e\u0644 \u0644\u0644\u0627\u062e\u062a\u064a\u0627\u0631. \u0644\u0627 \u062a\u0633\u062a\u0628\u062f\u0644\u0647\u0627 \u0628\u0627\u0644\u0645\u0642\u0627\u0633 \u0627\u0644\u0627\u0633\u0645\u064a \u0644\u0644\u0635\u0645\u0627\u0645 \u0623\u0648 \u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c.<\/td>\n<\/tr>\n
\u0647\u0644 \u062a\u0645 \u062a\u062d\u062f\u064a\u062f \u0648\u0633\u064a\u0637 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u062d\u0627\u0644\u062a\u0647 \u0628\u0634\u0643\u0644 \u0643\u0627\u0641\u064d\u061f<\/td>\n\u062a\u0627\u0628\u0639 \u0641\u0642\u0637 \u0645\u0639 \u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u0631\u0634\u062d\u0629 \u0627\u0644\u062a\u064a \u064a\u062a\u0648\u0627\u0641\u0642 \u0646\u0637\u0627\u0642 \u062e\u062f\u0645\u062a\u0647\u0627 \u0645\u0639 \u062a\u0644\u0643 \u0627\u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a.<\/td>\n<\/tr>\n
\u0647\u0644 \u064a\u0639\u062a\u0645\u062f \u0627\u0644\u0637\u0644\u0628 \u0641\u0642\u0637 \u0639\u0644\u0649 \u0643\u0644\u0645\u062a\u064a \u201cLNG\u201d \u0623\u0648 \u201c\u0645\u0628\u0631\u062f\u201d\u061f<\/td>\n\u062a\u0648\u0642\u0641. \u0647\u0630\u0647 \u0627\u0644\u062a\u0633\u0645\u064a\u0627\u062a \u0644\u064a\u0633\u062a \u0623\u0633\u0627\u0633\u064b\u0627 \u0647\u0646\u062f\u0633\u064a\u064b\u0627 \u0643\u0627\u0645\u0644\u0627\u064b \u0644\u0644\u0627\u062e\u062a\u064a\u0627\u0631.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

\u0645\u0627 \u0627\u0644\u0630\u064a \u0644\u0627 \u064a\u064f\u0639\u062a\u0628\u0631 \u0623\u0633\u0627\u0633\u064b\u0627 \u0643\u0627\u0645\u0644\u0627\u064b \u0644\u0644\u0627\u062e\u062a\u064a\u0627\u0631\u061f<\/h3>\n

\u0642\u062f \u064a\u0643\u0648\u0646 \u062d\u062c\u0645 \u0627\u0644\u062a\u0648\u0635\u064a\u0644 \u0627\u0644\u0627\u0633\u0645\u064a\u060c \u0623\u0648 \u0641\u0626\u0629 \u0627\u0644\u0636\u063a\u0637\u060c \u0623\u0648 \u0627\u0633\u0645 \u0627\u0644\u0645\u0627\u062f\u0629 \u0627\u0644\u0645\u0623\u0644\u0648\u0641\u060c \u0623\u0648 \u0648\u0635\u0641 \u0627\u0644\u0645\u0646\u062a\u062c \u0627\u0644\u0645\u0628\u0631\u062f \u0627\u0644\u0639\u0627\u0645 \u0630\u0627 \u0635\u0644\u0629 \u0644\u0627\u062d\u0642\u064b\u0627\u060c \u0644\u0643\u0646 \u0644\u0627 \u0634\u064a\u0621 \u0645\u0646\u0647\u0627 \u064a\u062d\u0644 \u0645\u062d\u0644 \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u062d\u062f\u062f\u0629. \u0627\u0644\u0628\u062f\u0621 \u0628\u0647\u0630\u0647 \u0627\u0644\u062d\u0642\u0648\u0644 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0639\u0643\u0633 \u0627\u0644\u062a\u0633\u0644\u0633\u0644 \u0627\u0644\u0647\u0646\u062f\u0633\u064a: \u064a\u0628\u062f\u0623 \u0627\u0644\u0645\u0634\u062a\u0631\u064a \u0628\u0635\u0645\u0627\u0645 \u0645\u062a\u0627\u062d \u0648\u064a\u062d\u0627\u0648\u0644 \u062c\u0639\u0644 \u0627\u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u062a\u0646\u0627\u0633\u0628\u0647.<\/p>\n

\u0627\u0644\u062a\u0633\u0644\u0633\u0644 \u0627\u0644\u0635\u062d\u064a\u062d \u0647\u0648 \u0627\u0644\u0639\u0643\u0633. \u062d\u062f\u062f \u0627\u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0623\u0648\u0644\u0627\u064b\u060c \u062b\u0645 \u0627\u062e\u062a\u0628\u0631 \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u0631\u0634\u062d\u0629 \u062a\u0637\u0627\u0628\u0642\u0647\u0627.<\/p>\n<\/section>\n

\n

\u062d\u062f\u062f \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0642\u0628\u0644 \u0645\u0642\u0627\u0631\u0646\u0629 \u062a\u0635\u0645\u064a\u0645\u0627\u062a \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a<\/h2>\n

\u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0647\u064a \u0645\u062a\u063a\u064a\u0631 \u0627\u062e\u062a\u064a\u0627\u0631 \u0644\u0623\u0646 \u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u0631\u0634\u062d\u0629 \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0643\u0648\u0646 \u0645\u062d\u062f\u0648\u062f\u0629 \u0628\u0627\u0644\u062d\u0627\u0644\u0629. \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u062a\u0639\u0645\u064a\u0645 \u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u062d\u062f\u062f\u0629 \u0644\u062d\u0627\u0644\u0629 \u062a\u0646\u0641\u064a\u0633 \u0648\u0627\u062d\u062f\u0629 \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0639\u0644\u0649 \u062d\u0627\u0644\u0629 \u0623\u062e\u0631\u0649 \u0644\u0645\u062c\u0631\u062f \u0623\u0646 \u0643\u0644\u0627 \u0627\u0644\u0645\u062a\u0637\u0644\u0628\u064a\u0646 \u064a\u062a\u0636\u0645\u0646\u0627\u0646 LNG.<\/p>\n

\u0627\u0646\u0642\u0644 \u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0625\u0644\u0649 \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0645\u0631\u0634\u062d\u064a\u0646<\/h3>\n

\u064a\u062c\u0628 \u0623\u0646 \u062a\u0638\u0644 \u0634\u0627\u0634\u0629 \u0627\u0644\u0635\u0645\u0627\u0645 \u0645\u0631\u062a\u0628\u0637\u0629 \u0628\u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u062d\u062f\u062f. \u064a\u062d\u062a\u0627\u062c \u0627\u0644\u0645\u0631\u0627\u062c\u0639 \u0625\u0644\u0649 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0643\u0627\u0641\u064a\u0629 \u0644\u062a\u062d\u062f\u064a\u062f \u0648\u0633\u064a\u0637 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0637\u0648\u0631\u0647\u060c \u0648\u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0627\u0644\u0645\u062d\u062f\u062f \u0645\u0633\u0628\u0642\u064b\u0627\u060c \u0648\u0638\u0631\u0648\u0641 \u0627\u0644\u062e\u062f\u0645\u0629 \u0627\u0644\u062a\u064a \u0633\u064a\u062a\u0645 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0646\u0637\u0627\u0642 \u0627\u0644\u0645\u0631\u0634\u062d \u0627\u0644\u0645\u0648\u062b\u0642 \u0645\u0642\u0627\u0628\u0644\u0647\u0627.<\/p>\n

\n\n\n\n\n\n\n\n
\u0645\u062f\u062e\u0644\u0627\u062a \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631<\/th>\n\u0644\u0645\u0627\u0630\u0627 \u064a\u0647\u0645 \u0630\u0644\u0643 \u0641\u064a \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0645\u0631\u0634\u062d<\/th>\n\u0625\u0630\u0627 \u0644\u0645 \u064a\u062a\u0645 \u0627\u0644\u062d\u0644<\/th>\n<\/tr>\n<\/thead>\n
\u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062d\u0627\u0643\u0645<\/td>\n\u064a\u062d\u062f\u062f \u0627\u0644\u0637\u0644\u0628 \u0627\u0644\u0630\u064a \u064a\u062c\u0628 \u062a\u0642\u064a\u064a\u0645 \u0627\u0644\u0645\u0631\u0634\u062d \u0639\u0644\u0649 \u0623\u0633\u0627\u0633\u0647.<\/td>\n\u0627\u0644\u0627\u062d\u062a\u0641\u0627\u0638 \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0633\u062a\u0646\u062a\u0627\u062c \u0627\u0644\u0645\u062a\u0637\u0644\u0628 \u0645\u0646 \u0627\u0644\u0635\u0645\u0627\u0645.<\/td>\n<\/tr>\n
\u0648\u0633\u064a\u0637 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0637\u0648\u0631\u0647<\/td>\n\u064a\u062d\u062f\u062f \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u0631\u0634\u062d \u062a\u063a\u0637\u064a \u062d\u0627\u0644\u0629 \u0627\u0644\u062e\u062f\u0645\u0629 \u0627\u0644\u0641\u0639\u0644\u064a\u0629.<\/td>\n\u0627\u0644\u0627\u062d\u062a\u0641\u0627\u0638 \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u0623\u0633\u0627\u0633 \u0627\u0644\u0637\u0648\u0631 \u0627\u0644\u0645\u0641\u062a\u0631\u0636.<\/td>\n<\/tr>\n
\u0638\u0631\u0648\u0641 \u0627\u0644\u062e\u062f\u0645\u0629 \u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629<\/td>\n\u064a\u0648\u0641\u0631 \u0627\u0644\u0623\u0633\u0627\u0633 \u0644\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0628\u0646\u0627\u0621 \u0645\u0646\u062e\u0641\u0636 \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0648\u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u0623\u062e\u0631\u0649 \u0627\u0644\u062d\u0633\u0627\u0633\u0629 \u0644\u0644\u062e\u062f\u0645\u0629.<\/td>\n\u0627\u0644\u0627\u062d\u062a\u0641\u0627\u0638 \u0625\u0630\u0627 \u062a\u0639\u0630\u0631 \u0645\u0637\u0627\u0628\u0642\u0629 \u0627\u0644\u0645\u0631\u0634\u062d \u0645\u0639 \u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0642\u0635\u0648\u062f.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

\u0627\u0644\u0637\u0648\u0631 \u0647\u0648 \u062d\u062f \u0644\u0644\u0623\u062f\u0644\u0629<\/h3>\n

\u0642\u062f \u062a\u062a\u0648\u0641\u0631 \u0623\u062f\u0644\u0629 \u0644\u062a\u0635\u0645\u064a\u0645\u0627\u062a \u0645\u062e\u062a\u0644\u0641\u0629 \u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0644\u062d\u0627\u0644\u0627\u062a \u0645\u062e\u062a\u0644\u0641\u0629 \u0645\u0646 \u0627\u0644\u0645\u0627\u0626\u0639. \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0642\u0628\u0648\u0644 \u0645\u0631\u0634\u062d \u0645\u0648\u062b\u0642 \u0644\u062d\u0627\u0644\u0629 \u0648\u0627\u062d\u062f\u0629 \u0644\u062d\u0627\u0644\u0629 \u062a\u0646\u0641\u064a\u0633 \u0645\u062e\u062a\u0644\u0641\u0629 \u062f\u0648\u0646 \u062f\u0644\u064a\u0644 \u0639\u0644\u0649 \u0623\u0646 \u0627\u0644\u0646\u0637\u0627\u0642 \u0627\u0644\u0645\u0648\u062b\u0642 \u064a\u0645\u062a\u062f \u0625\u0644\u0649 \u062a\u0644\u0643 \u0627\u0644\u062d\u0627\u0644\u0629.<\/p>\n

\u0625\u0630\u0627 \u0643\u0627\u0646 \u0623\u0633\u0627\u0633 \u0645\u0631\u062d\u0644\u0629 \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u063a\u064a\u0631 \u0645\u062d\u062f\u062f\u060c \u0641\u0625\u0646 \u0627\u0644\u0625\u062c\u0631\u0627\u0621 \u0627\u0644\u0635\u062d\u064a\u062d \u0647\u0648 \u062a\u0639\u0644\u064a\u0642<\/strong>. \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0645\u0631\u062d\u0644\u0629 \u0645\u0639\u0631\u0648\u0641\u0629 \u0648\u0644\u0643\u0646 \u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u0631\u0634\u062d \u0644\u0627 \u062a\u062b\u0628\u062a \u0627\u0644\u062a\u063a\u0637\u064a\u0629\u060c \u0641\u0627\u062d\u062a\u0641\u0638 \u0628\u0627\u0644\u0645\u0631\u0634\u062d \u0642\u064a\u062f \u0627\u0644\u0627\u0646\u062a\u0638\u0627\u0631 \u0644\u062d\u064a\u0646 \u062a\u0648\u0641\u0631 \u0627\u0644\u0623\u062f\u0644\u0629. \u0625\u0630\u0627 \u062a\u0639\u0627\u0631\u0636 \u0627\u0644\u0646\u0637\u0627\u0642 \u0627\u0644\u0645\u0648\u062b\u0642 \u0644\u0644\u0645\u0631\u0634\u062d \u0645\u0639 \u0645\u0631\u062d\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u062d\u062f\u062f\u0629\u060c, \u0631\u0641\u0636<\/strong> \u0630\u0644\u0643 \u0627\u0644\u0645\u0631\u0634\u062d \u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u062d\u0627\u0644\u064a. \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0644\u0644\u0645\u0642\u0627\u0644 \u0623\u0646 \u064a\u0645\u0644\u0623 \u0623\u064a\u064b\u0627 \u0645\u0646 \u0647\u0630\u0647 \u0627\u0644\u0641\u062c\u0648\u0627\u062a \u0628\u0627\u0641\u062a\u0631\u0627\u0636 \u0645\u0646\u0627\u0633\u0628.<\/p>\n

\u0627\u0641\u0635\u0644 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0639\u0646 \u062d\u0633\u0627\u0628 \u0627\u0644\u0645\u0642\u0627\u0633\u0627\u062a<\/h3>\n

\u0644\u0627 \u064a\u062d\u062f\u062f \u0647\u0630\u0627 \u0627\u0644\u062f\u0644\u064a\u0644 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u060c \u0648\u0644\u0627 \u064a\u062d\u0633\u0628 \u0641\u062a\u062d\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641\u060c \u0648\u0644\u0627 \u064a\u0639\u064a\u062f \u0625\u0646\u062a\u0627\u062c \u062a\u062d\u0644\u064a\u0644 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0623\u0648\u0644\u064a. \u062a\u0644\u0643 \u0627\u0644\u0645\u0647\u0627\u0645 \u062a\u062d\u062f\u062f \u0627\u0644\u0637\u0644\u0628 \u0627\u0644\u0645\u0641\u0631\u0648\u0636 \u0639\u0644\u0649 \u062c\u0647\u0627\u0632 \u0627\u0644\u062a\u0646\u0641\u064a\u0633. \u064a\u0628\u062f\u0623 \u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u0645\u0631\u0634\u062d \u0628\u0630\u0644\u0643 \u0627\u0644\u0637\u0644\u0628 \u0627\u0644\u0645\u062d\u062f\u062f \u0648\u064a\u0633\u0623\u0644 \u0639\u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u062a\u0643\u0648\u064a\u0646 \u0635\u0645\u0627\u0645 \u0645\u0639\u064a\u0646 \u0645\u062f\u0639\u0648\u0645\u064b\u0627 \u0644\u0647.<\/p>\n<\/section>\n

\"\u0645\u062e\u0637\u0637
Candidate selection begins after the relief duty and relieving state are defined; unresolved inputs remain on hold.<\/figcaption><\/figure>\n
\n

\u0627\u062e\u062a\u0631 \u0639\u0627\u0626\u0644\u0629 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0635\u0645\u0627\u0645 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0627\u0644\u0648\u0627\u062c\u0628\u060c \u0648\u0644\u064a\u0633 \u0639\u0644\u0649 \u0645\u0644\u0635\u0642 LNG<\/h2>\n

\u0644\u0627 \u062a\u0648\u062c\u062f \u0642\u0627\u0639\u062f\u0629 \u0642\u0627\u0626\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0623\u062f\u0644\u0629 \u062a\u0641\u064a\u062f \u0628\u0623\u0646 \u0628\u0646\u064a\u0629 \u0635\u0645\u0627\u0645 \u0648\u0627\u062d\u062f\u0629 \u0647\u064a \u0627\u0644\u0623\u0641\u0636\u0644 \u0639\u0627\u0644\u0645\u064a\u064b\u0627 \u0644\u062e\u062f\u0645\u0629 LNG. \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0648\u062c\u062f \u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0628\u0646\u0627\u0628\u0636 \u0645\u0628\u0627\u0634\u0631\u060c \u0648\u0645\u062a\u0648\u0627\u0632\u0646\u0629\u060c \u0648\u062a\u0639\u0645\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a \u0641\u064a \u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0627\u0644\u062a\u0628\u0631\u064a\u062f \u0627\u0644\u0639\u0645\u064a\u0642. \u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u0645\u0641\u064a\u062f \u0625\u0630\u0646 \u0644\u064a\u0633 \u201c\u0623\u064a \u0646\u0648\u0639 \u0647\u0648 \u0646\u0648\u0639 LNG\u061f\u201d \u0628\u0644 \u201c\u0623\u064a \u0639\u0627\u0626\u0644\u0627\u062a \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u062a\u0638\u0644 \u0630\u0627\u062a \u0645\u0635\u062f\u0627\u0642\u064a\u0629 \u0641\u064a \u0638\u0644 \u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u062d\u062f\u062f \u0648\u0627\u0644\u0638\u0631\u0648\u0641 \u0627\u0644\u0645\u0631\u0643\u0628\u0629\u061f\u201d<\/p>\n

\u0644\u0627 \u062a\u0633\u062a\u062c\u064a\u0628 \u0627\u0644\u0628\u0646\u064a\u0627\u062a \u0628\u0634\u0643\u0644 \u0645\u062a\u0637\u0627\u0628\u0642 \u0644\u0643\u0644 \u062d\u0627\u0644\u0629 \u0646\u0638\u0627\u0645. \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0647\u0648 \u0645\u062b\u0627\u0644 \u0648\u0627\u062d\u062f: \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0624\u062b\u0631 \u0639\u0644\u0649 \u0633\u0644\u0648\u0643 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u062a\u0642\u0644\u064a\u062f\u064a \u0627\u0644\u0645\u062d\u0645\u0644 \u0628\u0646\u0627\u0628\u0636\u060c \u0628\u064a\u0646\u0645\u0627 \u0642\u062f \u062a\u062f\u064a\u0631 \u0627\u0644\u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0627\u0644\u0645\u062a\u0648\u0627\u0632\u0646\u0629 \u0623\u0648 \u0627\u0644\u062a\u064a \u062a\u0639\u0645\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a \u0647\u0630\u0627 \u0627\u0644\u062a\u0623\u062b\u064a\u0631 \u0628\u0634\u0643\u0644 \u0645\u062e\u062a\u0644\u0641 \u0641\u064a \u062a\u0635\u0645\u064a\u0645\u0627\u062a \u0645\u062d\u062f\u062f\u0629. \u0627\u0644\u0633\u0644\u0648\u0643 \u0648\u0627\u0644\u062d\u062f\u0648\u062f \u0627\u0644\u0645\u0642\u0628\u0648\u0644\u0629 \u0627\u0644\u062f\u0642\u064a\u0642\u0629 \u062a\u0638\u0644 \u062e\u0627\u0635\u0629 \u0628\u0627\u0644\u0645\u0631\u0634\u062d.<\/p>\n

\"Diagram
LNG service does not automatically point to one valve architecture; the defined duty and installed conditions determine which families remain credible candidates.<\/figcaption><\/figure>\n

\u062a\u0635\u0645\u064a\u0645\u0627\u062a \u0627\u0644\u0646\u0627\u0628\u0636 \u0627\u0644\u0645\u0628\u0627\u0634\u0631 \u062a\u0638\u0644 \u062e\u064a\u0627\u0631\u064b\u0627 \u0645\u0634\u0631\u0648\u0637\u064b\u0627<\/h3>\n

\u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0643\u0648\u0646 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062a\u0642\u0644\u064a\u062f\u064a \u0630\u0648 \u0627\u0644\u0646\u0627\u0628\u0636 \u0627\u0644\u0645\u0628\u0627\u0634\u0631 \u0645\u0631\u0634\u062d\u064b\u0627 \u0645\u0634\u0631\u0648\u0639\u064b\u0627 \u0644\u0644\u062a\u0628\u0631\u064a\u062f \u0627\u0644\u0639\u0645\u064a\u0642 \u0639\u0646\u062f\u0645\u0627 \u064a\u062a\u0637\u0627\u0628\u0642 \u0646\u0637\u0627\u0642 \u062e\u062f\u0645\u062a\u0647 \u0627\u0644\u0645\u0648\u062b\u0642 \u0645\u0639 \u0627\u0644\u0648\u0627\u062c\u0628. \u0646\u0638\u0631\u064b\u0627 \u0644\u0623\u0646 \u062a\u063a\u064a\u0631 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0624\u062b\u0631 \u0639\u0644\u0649 \u0633\u0644\u0648\u0643 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u062a\u0642\u0644\u064a\u062f\u064a \u0627\u0644\u0645\u062d\u0645\u0644 \u0628\u0646\u0627\u0628\u0636\u060c \u0644\u0627 \u064a\u0645\u0643\u0646 \u062a\u062c\u0627\u0647\u0644 \u062d\u0627\u0644\u0629 \u0627\u0644\u0645\u0635\u0628 \u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0630\u0627\u062a \u0635\u0644\u0629 \u0628\u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u0631\u0643\u0628.<\/p>\n

\u0648\u062c\u0648\u062f \u0635\u0645\u0627\u0645\u0627\u062a \u062a\u0628\u0631\u064a\u062f \u0639\u0645\u064a\u0642 \u0628\u0646\u0627\u0628\u0636 \u0645\u0628\u0627\u0634\u0631 \u064a\u062f\u062d\u0636 \u0623\u064a\u0636\u064b\u0627 \u0627\u062e\u062a\u0635\u0627\u0631\u064b\u0627 \u0634\u0627\u0626\u0639\u064b\u0627: \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a \u0644\u064a\u0633 \u0634\u0631\u0637\u064b\u0627 \u0645\u0633\u0628\u0642\u064b\u0627 \u0644\u0645\u062c\u0631\u062f \u0623\u0646 \u0627\u0644\u062e\u062f\u0645\u0629 \u0647\u064a LNG.<\/p>\n

\u0627\u0644\u062a\u0635\u0627\u0645\u064a\u0645 \u0627\u0644\u0645\u062a\u0648\u0627\u0632\u0646\u0629 \u062a\u0639\u0627\u0644\u062c \u062a\u0623\u062b\u064a\u0631\u064b\u0627 \u0645\u062d\u062f\u062f\u064b\u0627 \u0641\u064a \u0627\u0644\u0646\u0638\u0627\u0645<\/h3>\n

\u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0627\u0644\u0645\u062a\u0648\u0627\u0632\u0646\u0629 \u0644\u062a\u0642\u0644\u064a\u0644 \u0623\u0648 \u062a\u0639\u0648\u064a\u0636 \u062a\u0623\u062b\u064a\u0631 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0641\u064a \u062a\u0635\u0627\u0645\u064a\u0645 \u0645\u062d\u062f\u062f\u0629. \u0648\u0647\u0630\u0627 \u064a\u062c\u0639\u0644\u0647\u0627 \u0630\u0627\u062a \u0635\u0644\u0629 \u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0638\u0631\u0648\u0641 \u0627\u0644\u0645\u062e\u0631\u062c \u062c\u0632\u0621\u064b\u0627 \u0645\u0647\u0645\u064b\u0627 \u0645\u0646 \u0645\u0634\u0643\u0644\u0629 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631.<\/p>\n

It does not make \u201cbalanced\u201d a blanket answer. The actual behavior and limits belong to the specific candidate evidence, and a balanced mechanism does not remove the need to understand the installed discharge condition.<\/p>\n

Pilot operation is another legitimate architecture, not a universal upgrade<\/h3>\n

Pilot-operated pressure-relief devices are also used in cryogenic applications. Their operating characteristics can differ materially from conventional direct-spring designs, including how particular designs respond to back pressure.<\/p>\n

Those differences make pilot-operated designs a legitimate branch in the selection process, not a default hierarchy. Before proceeding, the reviewer still has to establish that the particular candidate covers the required relieving state, cryogenic duty, outlet condition, and project documentation requirements.<\/p>\n<\/section>\n

\n

Verify Low-Temperature Construction, Materials, Seat Requirements, and Thermal Isolation<\/h2>\n

A candidate should not be accepted as cryogenic-suitable because of one material designation, one seat type, or one visible bonnet feature. Cryogenic pressure-relief suitability is a device-level question involving the complete configuration, its low-temperature service evidence, the seat and leakage requirement, and the way the relevant assembly is documented for the cold condition.<\/p>\n

This is why generic rules such as \u201cuse stainless steel,\u201d \u201cuse a metal seat,\u201d or \u201cuse an extended bonnet\u201d are not sufficient selection logic. Real cryogenic relief-valve designs use different material families, seat arrangements, and bonnet configurations. No single feature, by itself, proves suitability for the defined LNG duty.<\/p>\n

\"Generic
Cryogenic suitability should be verified across the complete valve configuration, including materials, seat\/leakage requirements, and thermal arrangement\u2014not inferred from one feature.<\/figcaption><\/figure>\n

Verify materials against the actual low-temperature duty<\/h3>\n

The material name is only one part of the check. Low-temperature suitability has to be supported for the relevant service condition and for the pressure-containing or functionally important components to which that evidence applies.<\/p>\n

Different metallic material families are used in real cryogenic relief-valve construction, so material screening should focus on documented suitability for the defined duty rather than a universal list copied from another valve or application.<\/p>\n

Treat seat construction and leakage acceptance as separate checks<\/h3>\n

Both metal and nonmetallic seat or sealing arrangements are used in cryogenic relief devices. That evidence does not support a universal claim that one seat category is inherently correct for LNG service.<\/p>\n

Seat construction tells the reviewer what is supplied; it does not, by itself, prove that the project’s leakage or tightness requirement is met. The buyer needs a defined acceptance basis and evidence that the proposed candidate satisfies it. If the project requires a tighter leakage condition than the otherwise applicable basis, that requirement must be stated rather than assumed.<\/p>\n

A vague claim such as \u201cleak tight\u201d is therefore less useful than a documented test or acceptance basis that can be compared with the project requirement.<\/p>\n

Verify bonnet and thermal arrangement without imposing a universal geometry<\/h3>\n

Cryogenic safety valves exist with different bonnet configurations. Bonnet geometry and thermal isolation are therefore legitimate verification fields, but the evidence does not support a blanket rule that one arrangement is required for every LNG duty.<\/p>\n

The candidate review should establish what construction is actually supplied, how the manufacturer documents that configuration for the relevant cold exposure, and whether that documented scope matches the defined duty. The bonnet arrangement should not be used as a stand-alone proxy for cryogenic suitability.<\/p>\n

Review the complete cryogenic evidence package<\/h3>\n

A useful cryogenic review looks across several categories rather than searching for one decisive feature:<\/p>\n

    \n
  • materials of pressure-containing and functionally important components;<\/li>\n
  • the candidate’s documented low-temperature service scope;<\/li>\n
  • seat and sealing construction;<\/li>\n
  • the required leakage or tightness acceptance basis;<\/li>\n
  • bonnet and thermal configuration;<\/li>\n
  • the test or documentation basis used to support the claimed service.<\/li>\n<\/ul>\n

    If a decision-critical category is missing, the candidate stays on HOLD. Missing evidence should not be converted into a positive claim, but it should not automatically be treated as proof that the valve is technically unsuitable either.<\/p>\n<\/section>\n

    \n

    Check the Outlet, Back Pressure, and Discharge Interface Before Accepting the Candidate<\/h2>\n

    A valve that appears suitable from its inlet-side duty can still require further review because of conditions at its outlet. Back pressure belongs to the installed discharge system and can influence relief-valve behavior, so the candidate should not be accepted without establishing the relevant outlet condition when the design depends on it.<\/p>\n

    Distinguish the source of back pressure<\/h3>\n

    Back pressure can arise because relief flow passes through the downstream discharge path, and pressure may also already exist at the outlet because of the wider system to which the valve discharges. These are different system conditions, but both can matter to candidate selection.<\/p>\n

    The selection guide does not calculate those conditions. It establishes whether they are known well enough to compare with the candidate’s documented behavior and whether any unresolved system hydraulics must be handled elsewhere.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n
    Outlet-interface question<\/th>\nCandidate-selection implication<\/th>\n<\/tr>\n<\/thead>\n
    Is the relevant outlet condition known?<\/td>\nIf not, HOLD when candidate acceptability depends on that condition.<\/td>\n<\/tr>\n
    \u0647\u0644 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0624\u062b\u0631 \u0627\u0644\u0636\u063a\u0637 \u0641\u064a \u0627\u062a\u062c\u0627\u0647 \u0645\u062c\u0631\u0649 \u0627\u0644\u0646\u0647\u0631 \u0639\u0644\u0649 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0645\u062e\u062a\u0627\u0631\u061f<\/td>\n\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0633\u0644\u0648\u0643 \u0627\u0644\u0645\u0648\u062b\u0642 \u0644\u0644\u0645\u0631\u0634\u062d \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0641\u062a\u0631\u0627\u0636 \u062d\u062f\u0648\u062f \u0639\u0627\u0645\u0629.<\/td>\n<\/tr>\n
    \u0647\u0644 \u062d\u0627\u0644\u0629 \u0627\u0644\u0645\u062e\u0631\u062c \u0645\u0639\u0631\u0648\u0641\u0629\u060c \u0644\u0643\u0646 \u0627\u0644\u0623\u062f\u0644\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0631\u0634\u062d \u0645\u0641\u0642\u0648\u062f\u0629 \u0623\u0648 \u063a\u064a\u0631 \u0645\u0643\u062a\u0645\u0644\u0629\u061f<\/td>\n\u062a\u0648\u0642\u0641. \u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0644\u064a\u0633\u062a \u0645\u062b\u0644 \u0639\u062f\u0645 \u0627\u0644\u062a\u0637\u0627\u0628\u0642 \u0627\u0644\u0645\u0648\u062b\u0642.<\/td>\n<\/tr>\n
    \u0647\u0644 \u062a\u062a\u0639\u0627\u0631\u0636 \u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0645\u0639\u0631\u0648\u0641\u0629 \u0645\u0639 \u0627\u0644\u0646\u0637\u0627\u0642 \u0627\u0644\u0645\u0648\u062b\u0642 \u0644\u0644\u0645\u0631\u0634\u062d\u061f<\/td>\n\u0627\u0631\u0641\u0636 \u0647\u0630\u0627 \u0627\u0644\u0645\u0631\u0634\u062d \u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u062d\u0627\u0644\u064a.<\/td>\n<\/tr>\n
    \u0647\u0644 \u064a\u0639\u062a\u0645\u062f \u0627\u0644\u0642\u0628\u0648\u0644 \u0639\u0644\u0649 \u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u0627\u062a \u0645\u062a\u0631\u0627\u0628\u0637\u0629 \u063a\u064a\u0631 \u0645\u062d\u0644\u0648\u0644\u0629\u061f<\/td>\n\u0648\u062c\u0651\u0647 \u0647\u0630\u0627 \u0627\u0644\u062a\u062d\u0644\u064a\u0644 \u0625\u0644\u0649 \u0645\u0627\u0644\u0643 \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0635\u0631\u064a\u0641\/\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u062a\u0648\u0633\u064a\u0639 \u0645\u0642\u0627\u0644\u0629 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0647\u0630\u0647 \u0644\u062a\u0634\u0645\u0644 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

    \u0644\u0627 \u062a\u062d\u0648\u0651\u0644 \u0634\u0627\u0634\u0629 \u0627\u0644\u0645\u0643\u0648\u0646 \u0625\u0644\u0649 \u062d\u0633\u0627\u0628 \u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0635\u0631\u064a\u0641<\/h3>\n

    \u062a\u0646\u062a\u0645\u064a \u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u0627\u062a \u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0645\u062e\u0631\u062c \u0627\u0644\u062a\u0641\u0635\u064a\u0644\u064a\u0629 \u0648\u0627\u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u0645\u062a\u0631\u0627\u0628\u0637\u0629 \u0625\u0644\u0649 \u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0639\u0644\u0649 \u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0646\u0638\u0627\u0645. \u064a\u062c\u0628 \u0623\u0646 \u062a\u062d\u062f\u062f \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629 \u0645\u062a\u0649 \u064a\u0643\u0648\u0646 \u0647\u0630\u0627 \u0627\u0644\u062a\u062d\u0644\u064a\u0644 \u0636\u0631\u0648\u0631\u064a\u064b\u0627\u060c \u0648\u0644\u064a\u0633 \u0625\u0639\u0627\u062f\u0629 \u0625\u0646\u062a\u0627\u062c\u0647.<\/p>\n

    The escalation point is practical: if the candidate can be screened against an established outlet condition, continue the component review. If the required outlet condition itself depends on unresolved scenario-specific hydraulics, the selection remains on HOLD until that system analysis is completed.<\/p>\n

    Use HOLD and REJECT differently<\/h3>\n

    An unknown outlet condition, or a known condition for which the candidate evidence is insufficient, is normally a \u062a\u0639\u0644\u064a\u0642<\/strong>. A documented conflict between the known installed condition and the candidate’s supported operating scope is a \u0631\u0641\u0636<\/strong>.<\/p>\n

    Keeping those states separate prevents an evidence gap from being mistaken for a technical failure.<\/p>\n<\/section>\n

    \"Diagram
    A plausible candidate still needs an established outlet condition and sufficient supporting documentation; unresolved evidence stays on hold, while a documented mismatch supports rejection.<\/figcaption><\/figure>\n
    \n

    Close the Selection With Documentation, Reject\/Hold Logic, and an Evidence-Ready RFQ<\/h2>\n

    The final selection result should not be a vague statement that the valve \u201clooks suitable.\u201d Close the screen with one of three explicit states: \u0645\u062a\u0627\u0628\u0639\u0629<\/strong>, \u062a\u0639\u0644\u064a\u0642<\/strong>, or \u0631\u0641\u0636<\/strong>.<\/p>\n

    \u0645\u062a\u0627\u0628\u0639\u0629<\/strong> means the defined LNG duty and the candidate evidence are aligned well enough to continue into final engineering and RFQ review. It does not mean final approval for installation, operation, compliance, or project acceptance.<\/p>\n

    Use documentation to prove the candidate you are actually reviewing<\/h3>\n

    The evidence package should relate to the specific proposed configuration rather than to a general product family or a generic cryogenic claim. Depending on the applicable project framework, the review may need documentation addressing areas such as:<\/p>\n

      \n
    • the defined relieving duty and phase carried forward from upstream engineering;<\/li>\n
    • the candidate’s documented cryogenic service scope;<\/li>\n
    • pressure-containing and functionally important materials;<\/li>\n
    • seat and sealing construction;<\/li>\n
    • the leakage or seat-tightness acceptance basis;<\/li>\n
    • bonnet and thermal configuration;<\/li>\n
    • outlet and back-pressure applicability;<\/li>\n
    • design, manufacture, inspection, testing, or other project-required evidence where applicable;<\/li>\n
    • capacity evidence required by the governing project basis, without recalculating capacity in this selection guide.<\/li>\n<\/ul>\n

      Testing, capacity evidence, formal conformity evidence, and project approval are not interchangeable concepts. A document should be used only for the claim and scope it actually establishes.<\/p>\n

      Apply PROCEED, HOLD, and REJECT consistently<\/h3>\n
      \n\n\n\n\n\n\n\n
      \u0642\u0631\u0627\u0631<\/th>\n\u0627\u0633\u062a\u062e\u062f\u0645\u0647 \u0639\u0646\u062f\u0645\u0627<\/th>\nWhat happens next<\/th>\n<\/tr>\n<\/thead>\n
      \u0645\u062a\u0627\u0628\u0639\u0629<\/strong><\/td>\nThe upstream relief basis is defined, the duty and phase align with the candidate evidence, cryogenic construction and leakage requirements are sufficiently supported, the relevant outlet condition is established, and the decision-critical documentation is available for review.<\/td>\nContinue to final engineering and RFQ review.<\/td>\n<\/tr>\n
      \u062a\u0639\u0644\u064a\u0642<\/strong><\/td>\nA decision-critical input, candidate document, outlet condition, project requirement, or supplier-specific fact remains unresolved.<\/td>\nRequest the missing information or return the unresolved engineering item to its correct owner.<\/td>\n<\/tr>\n
      \u0631\u0641\u0636<\/strong><\/td>\nA known project requirement conflicts with the documented candidate scope.<\/td>\nRemove that candidate from the current selection path and review another supported configuration.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

      Turn unresolved fields into RFQ inputs instead of assumptions<\/h3>\n

      If the final valve has not yet been selected, the RFQ should carry forward unresolved technical fields rather than replace them with supplier assumptions. Those fields can include the defined duty and phase, cryogenic service requirement, seat\/leakage requirement, relevant outlet condition, and the documentation that the project expects the supplier to provide.<\/p>\n

      Supplier-specific facts remain supplier-specific. A buyer should not infer a material, seat configuration, low-temperature capability, back-pressure limit, test result, formal conformity status, or project acceptance simply because another valve or another manufacturer documents that feature.<\/p>\n

      Keep the final engineering boundary visible<\/h3>\n

      This selection workflow is designed to improve the quality of the candidate presented for engineering review. It does not replace the upstream relief analysis, detailed discharge-system analysis, project-specific compliance review, or final verification of the supplied valve documentation.<\/p>\n

      The most useful final question is therefore not \u201cIs this an LNG safety valve?\u201d It is:<\/p>\n

      Does the documented candidate match the defined LNG relief duty closely enough to proceed to engineering review, or is there a known mismatch or unresolved evidence gap that requires REJECT or HOLD?<\/strong><\/p>\n<\/section>\n<\/article>","protected":false},"excerpt":{"rendered":"

      Selecting a cryogenic safety valve for LNG service should begin only after the relief basis is defined well enough to support candidate screening. If the governing relief duty or relieving phase is still unresolved, the correct selection decision is HOLD, not an assumed valve type. This guide addresses the next step: screening a valve candidate…<\/p>","protected":false},"author":2,"featured_media":56696,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73],"tags":[],"class_list":["post-56665","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-valve-types-selection"],"_links":{"self":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56665","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=56665"}],"version-history":[{"count":1,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56665\/revisions"}],"predecessor-version":[{"id":56776,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56665\/revisions\/56776"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media\/56696"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media?parent=56665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/categories?post=56665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/tags?post=56665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}