{"id":6257,"date":"2026-05-13T15:04:09","date_gmt":"2026-05-13T07:04:09","guid":{"rendered":"https:\/\/uniasen.com\/?p=6257"},"modified":"2026-05-14T17:17:53","modified_gmt":"2026-05-14T09:17:53","slug":"astm-a53-%eb%93%b1%ea%b8%89-a-%eb%8c%80-%eb%93%b1%ea%b8%89-b","status":"publish","type":"post","link":"https:\/\/uniasen.com\/ko\/blog\/astm-a53-grade-a-vs-grade-b\/","title":{"rendered":"ASTM A53 A\uae09 \ub300 B\uae09"},"content":{"rendered":"<h2>\uc18c\uac1c<\/h2>\n<p>\ud0c4\uc18c\uac15 \ud30c\uc774\ud504\uc758 \uc77c\ubc18\uc801\uc778 \uaddc\uaca9\uc740 ASTM A53\uc785\ub2c8\ub2e4. \uc774 \uaddc\uaca9\uc740 \uc8fc\ub85c \uc555\ub825 \ubc0f \uae30\uacc4\uc801 \uc6a9\ub3c4\ub85c \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4. <a href=\"https:\/\/uniasen.com\/ko\/%ed%91%9c%ec%a4%80\/astm-a53\/\">ASTM A53 \ud30c\uc774\ud504<\/a> \uc0b0\uc5c5 \ubc0f \uacf5\uacf5 \uc2dc\uc124 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \ub2e4\uc591\ud55c \uc885\ub958\uc758 \uac00\uc2a4\uc640 \uc720\uccb4\ub97c \uc548\uc804\ud558\uac8c \uc218\uc1a1\ud558\ub294 \ub370 \ud0c1\uc6d4\ud55c \uc131\ub2a5\uc744 \ubc1c\ud718\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc720\uccb4\uc640 \uac00\uc2a4\uc5d0\ub294 \uc99d\uae30, \ubb3c, \ucc9c\uc5f0\uac00\uc2a4, \uc555\ucd95 \uacf5\uae30 \ub4f1\uc774 \ud3ec\ud568\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud130\ube48\uacfc \uac19\uc740 \ub09c\ubc29 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc774\ub7ec\ud55c \ubc30\uad00\uc740 \uace0\uc628\uc758 \uc99d\uae30\ub97c \uc6b4\ubc18\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>ASTM A53 \ud45c\uc900\uc5d0 \ud3ec\ud568\ub418\ub294 \ud30c\uc774\ud504\uc5d0\ub294 \uc138 \uac00\uc9c0 \uc720\ud615\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc720\ud615\uc5d0\ub294 \uc774\uc74c\ub9e4 \uc5c6\ub294 \ud30c\uc774\ud504, \uc804\uae30 \uc800\ud56d \uc6a9\uc811 \ud30c\uc774\ud504, \uc6a9\uad11\ub85c \uc6a9\uc811 \ud30c\uc774\ud504\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4. \uc774 \ubd84\ub958 \uc911\uc5d0\uc11c \uac00\uc7a5 \uc790\uc8fc \uc9c0\uc815\ub418\ub294 \ub4f1\uae09\uc740 A\uae09\uacfc B\uae09\uc785\ub2c8\ub2e4.<\/p>\n<p>\ube44\uc6a9 \ud6a8\uc728\uc131\uc744 \uc720\uc9c0\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc801\uc808\ud55c \ub4f1\uae09\uc744 \uc120\ud0dd\ud558\ub294 \uac83\uc774 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \ub610\ud55c \uc62c\ubc14\ub978 \ub4f1\uae09\uc744 \uc120\ud0dd\ud574\uc57c \uc6b0\uc218\ud55c \uc131\ub2a5\uacfc \uc548\uc804\uc131\uc744 \ubcf4\uc7a5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub450 \ub4f1\uae09\uc740 \ud654\ud559 \uc870\uc131 \ubc0f \uc0dd\uc0b0 \uacf5\uc815\uc774 \ube44\uc2b7\ud558\uc9c0\ub9cc, \uae30\uacc4\uc801 \uac15\ub3c4\uc640 \uc6a9\ub3c4 \uc801\ud569\uc131 \uba74\uc5d0\uc11c\ub294 \ud070 \ucc28\uc774\ub97c \ubcf4\uc785\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ucc28\uc774\uc810\uc744 \uc774\ud574\ud558\uba74 \uc5d4\uc9c0\ub2c8\uc5b4\uc640 \ud504\ub85c\uc81d\ud2b8 \uad00\ub9ac\uc790\uac00 \uc815\ubcf4\uc5d0 \uc785\uac01\ud55c \uacb0\uc815\uc744 \ub0b4\ub9ac\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub429\ub2c8\ub2e4.<\/p>\n<h2>ASTM A53 \uaddc\uaca9 \uac1c\uc694 (A\uae09 \ub300 B\uae09)<\/h2>\n<p>ASTM A53 \ud45c\uc900\uc740 A\uae09 \ubc0f B\uae09\uc744 \ud3ec\ud568\ud55c \ud0c4\uc18c\uac15 \ud30c\uc774\ud504\uc5d0 \ub300\ud55c \uc694\uad6c \uc0ac\ud56d\uc744 \uaddc\uc815\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc81c\uc870\uc5c5\uccb4\ub294 \ud0c4\uc18c\uac15 \ud30c\uc774\ud504\ub97c \uc0dd\uc0b0\ud560 \ub54c \uc774\ub7ec\ud55c \uc694\uad6c \uc0ac\ud56d\uc744 \uc900\uc218\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<p>\uc774 \ud45c\uc900\uc758 \uc0ac\uc591(A\uae09 \ubc0f B\uae09 \ud3ec\ud568)\uc740 \u201c\uae30\uacc4\uc801 \ud2b9\uc131 \ubc0f \ud654\ud559 \uc131\ubd84\u201d\uc744 \uae30\uc900\uc73c\ub85c \uaddc\uc815\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc2dc\ud5d8 \uc808\ucc28\ub294 \uc774 \uc7ac\ub8cc\uc758 \ud488\uc9c8\uc744 \uac80\uc0ac\ud558\ub294 \ub370 \uc788\uc5b4 \ud575\uc2ec \ub2e8\uacc4\uc785\ub2c8\ub2e4. \uc81c\uc870 \uacf5\uc815 \ub610\ud55c ASTM A53 \uc0ac\uc591\uc744 \uaddc\uc815\ud569\ub2c8\ub2e4. \uce58\uc218 \uacf5\ucc28\ub294 \uc774 \ud30c\uc774\ud504\uc758 \u201c\uae38\uc774 \ubc0f \uc9c1\uacbd\u201d\uc744 \uaddc\uc815\ud569\ub2c8\ub2e4.<\/p>\n<h3>\uae30\uacc4\uc801 \ud2b9\uc131<\/h3>\n<p>\ub450 \ub4f1\uae09(A\uc640 B)\uc758 \uccab \ubc88\uc9f8 \ucc28\uc774\uc810\uc740 \u201c\uae30\uacc4\uc801 \uac15\ub3c4\u201d\uc785\ub2c8\ub2e4. B \ub4f1\uae09\uc740 \u201c\uc555\ub825 \ubc0f \uad6c\uc870\uc6a9\u201d \uc6a9\ub3c4\uc5d0 \ub354 \uc801\ud569\ud569\ub2c8\ub2e4.<\/p>\n<ul>\n<li>A \ub4f1\uae09\uc758 \u201c\uc778\uc7a5 \uac15\ub3c4\u201d\ub294 \ucd5c\uc18c 330 MPa\uc774\uba70, B \ub4f1\uae09\uc758 \uacbd\uc6b0 415 MPa\uc785\ub2c8\ub2e4.<\/li>\n<li>A \ub4f1\uae09\uc740 \uc751\ub825\uc774 \ub0ae\uace0 \uc555\ub825\uc774 \uc911\uac04 \uc815\ub3c4\uc778 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc6b0\uc218\ud55c \uc131\ub2a5\uc744 \ubc1c\ud718\ud569\ub2c8\ub2e4.<\/li>\n<li>A \ub4f1\uae09\uc758 \u201c\ud56d\ubcf5 \uac15\ub3c4\u201d\ub294 \ucd5c\uc18c 205 MPa\uc774\uba70, B \ub4f1\uae09\uc758 \uacbd\uc6b0 240 MPa\uc785\ub2c8\ub2e4.<\/li>\n<li>B \ub4f1\uae09\uc740 \uc911\uc7a5\ube44 \uc6b4\ubc18 \ubc0f \uace0\uc555 \uc6a9\ub3c4\uc5d0 \ub9e4\uc6b0 \uc801\ud569\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>\ud654\ud559 \uc870\uc131:<\/h3>\n<p>ASTM A53 \ub4f1\uae09 A \ubc0f B \ud30c\uc774\ud504\uc758 \u201c\ud654\ud559 \uc870\uc131\u201d\uc5d0\ub294 \uc57d\uac04\uc758 \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ucc28\uc774\ub294 \ud30c\uc774\ud504\uc758 \uae30\uacc4\uc801 \uac15\ub3c4\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4.<\/p>\n<ul>\n<li>B \ub4f1\uae09\uc740 \ud0c4\uc18c\uc640 \ub9dd\uac04\uc758 \ud568\ub7c9\uc774 \ub354 \ub192\uc2b5\ub2c8\ub2e4.<\/li>\n<li>A \ub4f1\uae09\uc758 \u201c\ud0c4\uc18c\u201d \ud568\ub7c9\uc740 0.25%\uc774\uace0, B \ub4f1\uae09\uc740 0.30%\uc785\ub2c8\ub2e4.<\/li>\n<li>A\uae09\uc758 \u201c\ub9dd\uac04\u201d \ucd5c\ub300 \ud568\ub7c9\uc740 0.95%\uc774\uba70, B\uae09\uc758 \uacbd\uc6b0 1.20%\uc785\ub2c8\ub2e4.<\/li>\n<li>A \ub4f1\uae09\uacfc B \ub4f1\uae09 \ubaa8\ub450 \u201c\uc778\u201d \ud568\ub7c9\uc774 0.05%\uc785\ub2c8\ub2e4.<\/li>\n<li>\u201c\ub450 \ub4f1\uae09 \ubaa8\ub450 \u201d\ud669\u201c \ud568\ub7c9\uc740 0.045%\uc774\uace0, \u201d\uad6c\ub9ac\u201d \ud568\ub7c9\uc740 0.40%\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>\uc81c\uc870 \ubc29\ubc95<\/h3>\n<p>\ub450 \ub4f1\uae09\uc758 \uc81c\uc870 \uacf5\uc815\uc740 \uac70\uc758 \ube44\uc2b7\ud569\ub2c8\ub2e4. ASTM A53(A\uae09 \ubc0f B\uae09) \ud30c\uc774\ud504\uc758 \uc81c\uc870 \uc720\ud615\uc73c\ub85c\ub294 S\ud615, F\ud615, E\ud615\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li>S\ud615 \ud30c\uc774\ud504\ub294 \uace0\uccb4 \ube4c\ub81b\uc73c\ub85c \uc81c\uc791\ub41c \uc774\uc74c\ub9e4 \uc5c6\ub294 \ud30c\uc774\ud504\uc785\ub2c8\ub2e4. \uc6a9\uc811 \uc774\uc74c\ub9e4\uac00 \uc5c6\uc2b5\ub2c8\ub2e4. \uc774 \uc720\ud615\uc740 \uace0\uc555 \uc6a9\ub3c4\uc5d0 \ud0c1\uc6d4\ud55c \uc131\ub2a5\uc744 \ubc1c\ud718\ud569\ub2c8\ub2e4.<\/li>\n<li>E\ud615\uc740 \uc804\uae30 \uc800\ud56d \uc6a9\uc811 \ud30c\uc774\ud504\uc785\ub2c8\ub2e4. \uc774 \ud30c\uc774\ud504\ub294 \uac15\ud310\uc744 \uc6a9\uc811\ud558\uc5ec \uc81c\uc791\ub429\ub2c8\ub2e4. \uc774 \ud30c\uc774\ud504\ub294 \uce58\uc218 \uc77c\uad00\uc131\uc774 \ubcf4\uc7a5\ub429\ub2c8\ub2e4. \ub300\ub7c9 \uc0dd\uc0b0 \uc2dc \uacbd\uc81c\uc131\uc774 \ub6f0\uc5b4\ub0a9\ub2c8\ub2e4.<\/li>\n<li>F\ud615\uc740 \uc6a9\uad11\ub85c \uc6a9\uc811 \ud30c\uc774\ud504\uc785\ub2c8\ub2e4. \uc774 \uc720\ud615\uc740 A\ub4f1\uae09\uc5d0\uc11c\ub9cc \uc81c\uacf5\ub429\ub2c8\ub2e4. \uc774 \ud30c\uc774\ud504\ub294 \uc800\uc555 \uc6a9\ub3c4\uc5d0 \ub9e4\uc6b0 \uc801\ud569\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>\uce58\uc218 \ubc94\uc704<\/h3>\n<p>ASTM A53 \ud30c\uc774\ud504\ub294 \ub2e4\uc591\ud55c \ud504\ub85c\uc81d\ud2b8 \uc694\uad6c \uc0ac\ud56d\uc5d0 \ubd80\uc751\ud560 \uc218 \uc788\ub3c4\ub85d \ud3ed\ub113\uc740 \uaddc\uaca9\uacfc \ub450\uaed8\ub85c \uc81c\uacf5\ub429\ub2c8\ub2e4. \ub450 \ub4f1\uae09 \ubaa8\ub450 \uce58\uc218 \uae30\uc900\uc774 \ub3d9\uc77c\ud558\uba70, \ub300\ubd80\ubd84\uc758 \uc6a9\ub3c4\uc5d0\uc11c \uc0c1\ud638 \ud638\ud658\uc774 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\ub450 \ub4f1\uae09 \ubaa8\ub450\uc758 \uc77c\ubc18\uc801\uc778 \ud30c\uc774\ud504 \uaddc\uaca9 \ubc94\uc704\ub294 1\/8\uc778\uce58\uc5d0\uc11c 26\uc778\uce58\uc785\ub2c8\ub2e4.<\/li>\n<li>\ud45c\uc900 \ud30c\uc774\ud504 \uc2a4\ucf00\uc904(Sch 10, 40, 80 \ub4f1)\uc740 \ud574\ub2f9 \ud30c\uc774\ud504\uc758 \ubcbd \ub450\uaed8\ub97c \uaddc\uc815\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>\uc2dc\ud5d8 \ubc0f \uac80\uc0ac<\/h3>\n<p>ASTM A53 \ud30c\uc774\ud504\ub294 \ud488\uc9c8 \ubcf4\uc99d\uc5d0 \uc788\uc5b4 \ub9e4\uc6b0 \uae4c\ub2e4\ub86d\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc758 \uc2dc\ud5d8\uc744 \ud1b5\ud574 A\uae09 \ubc0f B\uae09 \ud30c\uc774\ud504 \ubaa8\ub450 \ub9e4\uc6b0 \ub192\uc740 \ud488\uc9c8\uc744 \ubcf4\uc7a5\ubc1b\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\uc544\uc5f0 \ub3c4\uae08 \uac80\uc0ac.<\/li>\n<li>\ube44\ud30c\uad34 \uac80\uc0ac.<\/li>\n<li>\uc544\uc5f0 \ub3c4\uae08 \uac80\uc0ac.<\/li>\n<li>\uc815\uc218\uc555 \uc2dc\ud5d8.<\/li>\n<\/ul>\n<p>\uc751\uc6a9 \ubd84\uc57c (A\ub4f1\uae09 \ub300 B\ub4f1\uae09):<br \/>\nB \ub4f1\uae09\uc740 \uc911\uc694\ub3c4\uac00 \ub192\uace0 \uace0\uc555\uc778 \uc6a9\ub3c4\uc5d0 \uc0ac\uc6a9\ub418\uba70, A \ub4f1\uae09\uc740 \uc911\uc694\ub3c4\uac00 \ub0ae\uc740 \uc6a9\ub3c4\uc5d0 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. A \ub4f1\uae09\uacfc B \ub4f1\uae09 \uc911 \uc5b4\ub290 \uac83\uc744 \uc120\ud0dd\ud560\uc9c0 \uacb0\uc815\ud560 \ub54c\ub294 \ubd80\ud558 \uc694\uad6c \uc0ac\ud56d\uacfc \uc0ac\uc6a9 \uc870\uac74\uc774 \uc8fc\uc694 \uace0\ub824 \uc0ac\ud56d\uc785\ub2c8\ub2e4.<\/p>\n<ul>\n<li>ASTM A53(A\uae09)\uc740 \uc800\uc555 \ubc30\uad00 \uc2dc\uc2a4\ud15c\uc5d0 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ubc18\uba74, B\uae09 \ud30c\uc774\ud504\ub294 \uc11d\uc720 \ubc0f \uac00\uc2a4 \ud30c\uc774\ud504\ub77c\uc778\uc5d0 \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<li>A\uae09 \ud30c\uc774\ud504\ub294 \uad6c\uc870\uc6a9 \uc9c0\uc9c0\ub300\ub85c\uc11c \ub6f0\uc5b4\ub09c \uc131\ub2a5\uc744 \ubc1c\ud718\ud569\ub2c8\ub2e4. B\uae09 \ud30c\uc774\ud504\ub294 \ubcf4\uc77c\ub7ec \ubc0f \uc99d\uae30 \uc2dc\uc2a4\ud15c\uc5d0 \uc774\uc0c1\uc801\uc778 \uc120\ud0dd\uc785\ub2c8\ub2e4.<\/li>\n<li>A\uae09\uc740 \ubc30\uc218\uad00 \ubc0f \ud658\uae30\uad00\uc5d0 \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4. B\uae09\uc740 \uc0c1\uc218\ub3c4\uad00\uc5d0 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<li>A\uae09 \ud30c\uc774\ud504\uc758 \uc8fc\uc694 \uc6a9\ub3c4\ub85c\ub294 \ub09c\uac04\uacfc \uc6b8\ud0c0\ub9ac\uac00 \uc788\uc2b5\ub2c8\ub2e4. B\uae09 \ud30c\uc774\ud504\ub294 \uc18c\ubc29 \uc2dc\uc2a4\ud15c\uc5d0 \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<li>\uae30\uacc4\uc6a9 \ud504\ub808\uc784\uc6cc\ud06c \uc5ed\uc2dc A\uae09 \ud30c\uc774\ud504\ub85c \uc81c\uc791\ub429\ub2c8\ub2e4. \ud558\uc911\uc744 \uc9c0\ud0f1\ud558\ub294 \uad6c\uc870 \ubd80\uc7ac\ub294 B\uae09 \ud30c\uc774\ud504\ub85c \uc81c\uc791\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>\uc120\uc815 \uc2dc \uace0\ub824 \uc0ac\ud56d: A\ub4f1\uae09 \ub300 B\ub4f1\uae09<\/h3>\n<p>ASTM A53\uc758 A\uae09\uacfc B\uae09 \uc911\uc5d0\uc11c \uc120\ud0dd\ud560 \ub54c \uace0\ub824\ud574\uc57c \ud560 \uba87 \uac00\uc9c0 \uc694\uc18c\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\uac00\uc7a5 \uba3c\uc800 \uace0\ub824\ud574\uc57c \ud560 \uc8fc\uc694 \uc694\uc18c\ub294 \uc791\ub3d9 \uc555\ub825\uc785\ub2c8\ub2e4. \uace0\uc555 \uc6a9\ub3c4\uc758 \uacbd\uc6b0 B \ub4f1\uae09\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4.<\/li>\n<li>\uc791\ub3d9 \uc555\ub825 \ub610\ud55c \uace0\ub824\ud574\uc57c \ud560 \ub610 \ub2e4\ub978 \uc694\uc18c\uc785\ub2c8\ub2e4. B \ub4f1\uae09\uc740 \ud558\uc911 \uc9c0\uc9c0 \uc6a9\ub3c4\uc5d0\uc11c \uac15\ub3c4 \uba74\uc5d0\uc11c \uc6b0\uc704\ub97c \ubcf4\uc785\ub2c8\ub2e4.<\/li>\n<li>\uc774 \ub450 \ub4f1\uae09 \uc911\uc5d0\uc11c \uc120\ud0dd\ud560 \ub54c\ub294 \ube44\uc6a9 \uc81c\uc57d\uc744 \uc911\uc810\uc801\uc73c\ub85c \uace0\ub824\ud558\uc2ed\uc2dc\uc624. \uc911\uc694\ub3c4\uac00 \ub192\uc9c0 \uc54a\uc740 \uc6a9\ub3c4\uc758 \uacbd\uc6b0 A\ub4f1\uae09\uc774 \ube44\uc6a9 \ub300\ube44 \ud6a8\uc728\uc774 \ub354 \ub192\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li>A \ub4f1\uae09\ub9cc\uc774 \uc6a9\uad11\ub85c \uc6a9\uc811 \ud30c\uc774\ud504\uc5d0 \uc0ac\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li>\uc548\uc804\uc0c1\uc758 \uc774\uc720\ub85c \ub9ce\uc740 \uacf5\ud559 \uc0ac\uc591\uc5d0\uc11c B \ub4f1\uae09\uc774 \uc694\uad6c\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>\uc11c\ub860 \ud0c4\uc18c\uac15 \ud30c\uc774\ud504\uc758 \uc77c\ubc18\uc801\uc778 \ud45c\uc900\uc740 ASTM A53\uc785\ub2c8\ub2e4. \uc774 \ud45c\uc900\uc740 \uc555\ub825 \ubc0f \uae30\uacc4\uc801 \uc6a9\ub3c4 \ubd84\uc57c\uc5d0\uc11c \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4. ASTM A53 \ud30c\uc774\ud504\ub294 \uc0b0\uc5c5 \ubc0f \uacf5\uacf5 \uc2dc\uc124 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \ub2e4\uc591\ud55c \uc885\ub958\uc758 \uac00\uc2a4\uc640 \uc720\uccb4\ub97c \uc548\uc804\ud558\uac8c \uc218\uc1a1\ud558\ub294 \ub370 \ud0c1\uc6d4\ud55c \uc131\ub2a5\uc744 \ubc1c\ud718\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc720\uccb4\uc640 \uac00\uc2a4\uc5d0\ub294 \uc99d\uae30, \ubb3c, \ucc9c\uc5f0\uac00\uc2a4, \uc555\ucd95 \uacf5\uae30 \ub4f1\uc774 \ud3ec\ud568\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub09c\ubc29 \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294\u2026<\/p>","protected":false},"author":10,"featured_media":6276,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6257","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - 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