1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS B 6942LNG Ni KS B 6942： 2007(2012 ) 2007 10 30 http:/www.kats.go.krKS B 6942： 2007 : ( ) ( ) () ( ) ： ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ：2007 10 30 ：2012 12 3 2012-0666 ： ： ( 02-509-7274) (http:/www.kats.go.kr). 10 5 , . KS B 6942： 2007 i 1 1 2 1
2、 3 .1 4 1 4.1 .1 4.2 2 4.3 3 5 3 5.1 LNG .3 5.2 3 5.3 3 5.4 .4 5.5 .4 5.6 5 6 .6 6.1 .6 6.2 .6 7 7 7.1 .7 7.2 9 % Ni 7 7.3 .8 7.4 .8 8 , .8 8.1 .8 8.2 .9 8.3 9 8.4 .9 8.5 .10 8.6 10 8.7 .10 8.8 10 8.9 10 9 10 9.1 (plate edge preparation)10 9.2 (rolling and pressing).11 10 11 KS B 6942： 2007 ii 10.1
3、11 10.2 .11 10.3 .11 10.4 12 10.5 .12 11 .13 11.1 .13 11.2 13 11.3 .13 11.4 .14 12 14 12.1 .14 12.2 .15 12.3 .15 12.4 .16 12.5 .16 .17 KS B 6942： 2007 (2012 ) LNG Ni Standard for Ni steel inner tank 1 9 % Ni ( “ ” .) , , , . (shell plate), (annular plate), (bottom plate) (insulation) . 2 . . ( ) . K
4、S B 6941, LNG KS B 6944, LNG API A370： 2007, Standard test methods and definitions for mechanical testing of steel products API 620： 1996, Design and Construction of large, Welded, Low Pressure Storage Tanks/Appendix Q low-pressure storage tanks for liquefied hydrocarbon gases AWS A5.11： 2005, Speci
5、fication for Nickel and Nickel Alloy welding electrodes for shielded metal arc welding AWS A5.14： 2005, Specification for Nickel and Nickel Alloy bare welding electrodes and rods BS 7777： 1993, Flat-bottomed, vertical, cylindrical storage tanks for low temperature service Part 2：Specification for th
6、e design and construction of single, double and full containment metal tanks for the storage of liquefied gas at temperatures down to 165 3 KS B 6941 . 4 4.1 1 . KS B 6942： 2007 2 1 A333 Grade 8bA522 A353aB444(UNS N06625), Gr.1 A334 Grade 8b A553, Type 1aB444(UNS N06625), Gr.2 a ASTM A353 A553 (heat
7、 treatment) . (nozzle neck) (reinforcement) rt (cm) . r (cm), t (cm) . (allowable stress) . b . 4.2 9 % Ni 4.2.1 4.2.2 (impact test) . 4.2.1 . a) (transverse) . b) V 196 ( 320 ) . ASTM A370 . c) V 2 . d) 3 ASTM A353 A553 0.38 mm (0.015 in) (lateral expansion) . e) ASTM A353 A553 . 4.2.2 . a) (heat-t
8、reatment lot) 3 . (heat-treatment lot) (ingot) . b) V 196 . c) V (longitudinal Charpy V-notch impact values) 2 . d) 3 , ASTM A353 A553 0.38 mm(0.015 in) . e) ASTM 353 A553 . 4.2.3 , . a) (lot) . b) V A333(8 ) A334 (8 ) 196 . c) V 2 . KS B 6942： 2007 3 d) 3 . ASTM A522, A333(8 ) A334(8 ) 0.38 mm(0.01
9、5 in) . e) ASTM A522, A333(8 ) A334(8 ) . 2 V (mm) a(J) b(J) a(J) b(J) 1010.00 27.1 21.7 33.9 27.1 107.50 20.3 16.3 25.8 21.7 106.67 17.6 13.6 23.1 17.6 105.00 13.6 10.8 17.6 13.6 103.33 9.5 6.8 10.8 9.5 102.50 6.8 5.4 8.1 6.8 a3 . b 3 . 4.3 ASTM A353, A553 . ASTM A6 . 5 5.1 LNG LNG LNG . 0.47 . 5.2
10、 165 . , . . 5.3 5.3.1 4.1 (maximum allowable design stress) . 5.3.2 3 (bolting steel) 1/3 2/3 . (allowable test stress) 11.1.3 . (weld filler metal) (specified minimum) , 7.1 . KS B 6942： 2007 4 3 MPa ASTM A353 689.48 517.11 aa A553, Type 1 689.48 586.48 aaA333, Grade 8 689.48 689.48 aaA334, Grade
11、8 689.48 517.11 aaB444(UNS N06625), Gr.1 827.37 413.69 275.79b372.32b B444(UNS N06625), Gr.2 689.48 275.79 206.84b248.21b A522 689.48 517.11 aaa 7.1 5.3.2 . 655 MPa , 361.97 MPa . 689.48 MPa, 399.90 MPa . bA353, A553 (opening reinforcement) .5.3.3 85 % 50 % . 5.3.4 (shell uplift) , . 5.3.5 API 620 A
12、ppendix Q 3.3.4 . 5.4 , . CStsTt += t ： (mm) T ： PRc(kPa mm) P ： LNG (kPa) Rc ： (mm) Sts ： (kPa) C ： (mm) 5.5 5.5.1 (lap-welded joint) 600 mm(24 in) , 50 mm(2 in) (butt-welded) . KS B 6942： 2007 5 (Lmin) . )(3.215minGHtLb= (mm) tb： (mm) H ： (m) G ： LNG 5.5.2 4 . 5.5.3 , (regular polygonal) . . 4 (fi
13、rst shell course) akPa mm 130.00 151.68 172.37 193.05 213.74 234.42 19.05 6.40 6.40 6.40 7.14 8.73 10.32 19.05 25.40 6.40 6.40 7.14 8.73 11.11 13.49 25.40 31.75 6.40 6.40 8.73 11.11 13.49 16.69 31.75 38.10 7.14 10.32 13.49 16.69 19.84 a . (concrete ringwall) . . (50D)(HG) t . D (m) H (m) G t (mm) 5.
14、5.4 . 5.5.5 300 mm(12 in) . 5.5.6 3 300 mm (12 in) . 5.5.7 (specified corrosion allowance) 4.8 mm (3/16 in) . 5.6 5.6.1 (stiffening ring) (roundness) . (stiffener) 5.6.2KS B 6942： 2007 6 5.6.5 . 5.6.2 “4. ” . (web) (intermittent weld) . 5.6.3 19 mm(3/4 in) (rat hole) ( 1 ). 5.6.4 (pass) . 50 mm(2 in
15、) ( 1 ), 50 mm(2 in) . 50 mm(2 in) . (crater) . 5.6.5 (moment of inertia) . . . . . . (5.6 )5.6.4 (shell)50mm50mm 1 ( ) 6 6.1 (liquid head), (static insulation pressure), . 6.2 (5.6 ) (shell) KS B 6942： 2007 7 5 . . 5 (m) (mm) 18.3 4.8 18.3 42.7 6.4 42.7 67.1 7.9 67.1 9.5 7 (covered electrode) 9 % (
16、bare-wire electrode) AWS A5.11 AWS A5.14 . 7.1 (the minimum ultimate tensile strength) API 620 4.7 . , (filler metal) . 3 5.3.1 AWS A5.11 9 2 . 0.2 % (0.2 % Offset Method) . 7.2 9 % Ni 9 % Ni , 7.2.1 7.2.5 . 7.2.1 V (duplicate test plate) . 7.2.2 . . 1.6 mm(1/16 in) . 7.2.3 . . , . 7.2.4 4.2 . 7.2.5
17、 4.2.2 c) d) . (erratic impact value) . KS B 6942： 2007 8 7.3 . a) . b) AWS . c) (interpass temperature) . 7.4 7.4.1 . 7.4.2 7.4.3 . 7.4.4 . (the heats) . 7.4.2 . . 7.4.3 . . t 2 t t/2 . 15.9 mm(5/8 in) . 15.9 mm(5/8 in) . t 2 t . 7.4.4 . . . 7.4.5 7.2.1 7.2.5 . 7.4.6 , . , 6 . . 8 , 8.1 8.1.1 . a)
18、b) c) . . d) (insert plates) e) KS B 6942： 2007 9 8.1.2 . a) . b) 9 % (mill scale) . , (slag) . c) (slip-on) . 8.1.3 (weld neck flange) , (manway neck), . . 8.2 8.2.1 . 8.2.2 API 620 8 . 8.3 8.3.1 25.4 mm(1 in) 300 mm(12 in) 8.3.2 8.3.4 . 8.3.2 , 10 300 mm(12 in) . , ( ) 90 . 8.3.3 300 mm(12 in) . 8.3.4 300 mm(12 in) . 8.4 . a) b) ( ) c) . 12.7 mm(1/2 in) . d) , , ( LNG KS B 6942： 2007 10 .) e) ( ) . 8.5 8.5.1 . 8.5.2 , , , . , , . 8.6 9 %
