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叠病俵彭
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1 GB/T GB/T Non-destructive testingradiographic testing of circumferential fusion-welded butt joints in metallic pipes and tubes

2 ... III % A...21 A.1 X...21 A.2 γ d...21 B...23 B B B I

3 C...25 C.1 I...25 C.2 II...25 D...27 D D E...32 E E II

4 GB/T ISO 17636:2003 T1T2T3T4 Se-75 A d B D E 1990 GB/T III

5 mm 2 GB/T GB GB/T GB GB/T GBZ GB GBZ X GB GBZ GB t nominal thickness 3.2 w penetrated thickness 3.3 b object-to-film distance 3.4 d source size 3.5 F source-to-film distance 3.6 f source-to-object distance 3.7 Do diameter 3.8 small diameter tube Do 100mm 3.9 K ratio of max.and min. penetrated thickness 1

6 , GB/T GBZ GB GB 18871GBZ117 GBZ GBZ GBZ A B A B A B, A B, A B h

9 GB/T D 0 100mm : at 8mm; bg D 0 /

10 % A 15mm 3 15mm 4 B K1.1 D A K1.2 B K1.1 D A D 0 76mm 100mm 90 D 0 76mm B T/D T/D o > GB/T T1T2T3 T4 T1 T / G min max G/ D min D=2.0 D=4.0 D=2.0 D=2.0 T T T T a mm WmmA B A B X 100kV X kV X kV T3 T2 T Yb169 w5 T T3 Tm170 w5 T X kV w50 T3 T

11 w50 T b Se75 T3 T Ir192 T3 T2 Co60 X 14MeV X 412MeV X 12MeV w100 w100 w100 w100 w100 w100 T3 T3 T2 T3 T2 T3 T2 T3 T2 w100 T2 w100 T3 T b c c 1 d 1 e a. b. 0.1mm 0.03mm c.a 0.52mm d. A 0.51mm e 3 X 150kV a A B mm X kV X kV T3 T Yb Se b a. b. 0.1mm 0.1mm 0.2mm 6.7 W X 400kV X W kV; 40kV; 30kV 7

12 6 X X X 4 W 10mm 4 X A Wmm B Tm170 W5 W5 Yb-169a 1W15 2W12 Se-75b 10W40 14W40 Ir W100 20W90 Co-60 40W200 60W150 X 1MeV4MeV 30W200 50W180 X 4MeV12MeV X 12MeV a. A 10W70B 25W55 b. A 35W X W=0.8 ( D T ) T +T X 700mm 15mAmin

13 7.5mAmin 6.8 W f A f10db 2/3 W T 2T/cos 2T/ cos B f15db 2/3 d A f A f 7 B f 8 2T T T 7 A f 9

14 8 B f f 50% f 20% JB/T B mm JB/T /4 a b F" F" mm JB/T mm E 10

15 : a 4 b mm Tmm Wmm Wmm A B A B A B C 100mm C 5mm

16 : R1R mm mm B 13mm 1.6mm B B B l0mm A 2.0D4.0 B 2.3D4.0 X A 1.5B

17 D D 0 76mm A 60% E min 10min 30s a D2.5 30cd/m 2 b D2.5 10cd/m III IV mm T mm mm

18 9 mm T T T T T mm mm /2T I 5mm mm 0 0 T T60 1 T 3 T60 20 T9 6 9T45 2 T 3 T L 12T T, 3L 6T T 14

19 1 L T 2 12T 6T 12T 3 T25mm 4mm25 mmt100mm 6mmT100mm 8mm D 0 100mm mm T <T<36 6L 2/3T 12T T36 12 T T9 6 9T30 3L 2/3T 6T T30 20 T 1 L T T 6T 12TII D 0 100mm

20 1 2 GB/T % % mm % mm % 100mm mm IV mm T

21 mm mm mm T,mm /3 T 10mm mm T T T 5mm Do100mm 19 Do 100mm Do100mm,mm mmt mm /3 T 4 6T T mm 30 2/3 T 6 3T T mm 40 17

22 , 20 Do 100mm,mm , % mm mm 3T T 100mm 100mm 30% IV mm T

23 , mm mm mm T mm T/ T 5mm 10 T 5mm 20 T 5mm mm,t

24 5 9.2 a b c d e f g h i

25 A A.1 X A.1, d A-1 A-2 A-3 A-4 d=2 1/2 a A-1 d=a 2 +b 2 1/2 A-2 d=a A-3 d=d A-4 A.1 X A.2 γ d γ d a, d 21

26 2 2 = a b A-4 d + A.2 22

27 B B.1 B.1 B.1 B.2 b15mm 15mm 1 B.1 Fe Ni Ti Al Cu - 3 #,,,,,, B

28 B

29 C C.1 I I ab C. C.1 T1- T2- T- C.1 I.1 I mm T T 1 T C.2 II C.2 C.2 25

30 C.2 II C.2 II mm h 1 h 2 h 3 h 4 h 5 h d D

31 D.1 D D 0 >100mm 100% D1 D4 ad1 K=1.1 DD2 K=1.1 cd3 K=1.2 dd4 K=1.2 D.2 : T/ D 0 D 0 /f T/ D 0 ; D 0 /f ; ; 27

32 D.1 K

33 D.2 K=1.1 29

34 D.3 K= mmD

35 D.4 K= mm D

36 E E.1 PQST E.1 t E.1 E.2 PQ ST P, Q, S, T a a = ON = OE E.1 P X M OM = h t h = a cost.e.2 L: L = PQ + ST η ο L = 2π a(1 t / 90 ) E.3 32

37 L t η = = 1 2 π a ο 90 GB/T E.4 E.2 t PQ ST 33

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