GOST 31448-2012 Steel pipes with defensive covering for main gas and oil pipelines Specifications《带防护性遮盖物的气体和石油主管道钢管 规格》.pdf

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3、5 . . - 12.3.01687 . . -. 17.2.3.0278 . . 41177 . 42775 . 869674 . - 1069280 , . , -, , 1126280 . 1164573 . -1 314482012 20140101 1351868 . 1419296 1514078 . 1633777 . 1729978 . 1829972 . -, 2029585 . 2581283 . -1) 2849890 . . 314472012 , . - , 1 , - . - (), () . , , , , .3 3.1 , .3.2 , 1. : 530 , 1

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5、 - * IV 60 C1141420 50 803- (3) () , - , -1141420 60 604- (2) () - 114820 50 605- (3) () 1141420 10 806- (3) () 1141420 20 807- (3) () , - , -1141420 20 1108- (2) () - 114820 10 1109 () () 114820 20 80* 1. , , , , .4 4.1 , 4.1.1 114 1420 , ().4.1.2 - . , , , , . - .3 3144820124.1.3 , -, ( ) , .4.1.4 Fe+2 30 /2. . () .4.1.5 (-) 50 C 70 C.4.1.6 . - Sa 2 1/2, Rz 4080 . . 100 .4.1.7 . 100 2 , 4.1.6.4.1.8 2 80 % 3 80 %. .4.1.9 () , .4.1.10 - .4.2 4.2.1 , , - .4.2.2 , .4.2.3 :- ,- ,- ,- .4.3 4.3.1 :- ; - : 60 , 20 . ;- ; : 150 , 200 ;- .4.3.2 :-

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