1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS C IEC 60079 30 2 30 2: , KS C IEC 60079 30 2:2008 2008 11 28 http:/www.kats.go.krKS C IEC 60079 30 2:2008 : ( ) ( ) ( ) : (http:/www.standard.go.kr) : : 2008 11 28 2008-0825 : : ( 02-509-729497) (http:/www.kats.go.kr). 10 5 , . KS C IEC 60079 30 2:2008 i
2、.1 1 1 2 1 3 .1 4 2 4.1 .2 4.2 2 4.3 .2 4.4 3 5 3 5.1 .3 5.2 4 5.3 4 5.4 6 5.5 .6 6 .7 6.1 .7 6.2 .8 6.3 8 6.4 9 6.5 .10 6.6 .11 6.7 .14 6.8 .16 6.9 18 6.10 18 6.11 18 6.12 18 6.13 .19 6.14 20 7 .20 7.1 .20 7.2 20 7.3 21 7.4 21 7.5 .21 7.6 21 7.7 22 KS C IEC 60079 30 2:2008 ii 8 .23 8.1 .23 8.2 23 8
3、.3 24 8.4 .29 8.5 .33 8.6 .35 8.7 .36 9 37 9.1 .37 9.2 37 9.3 38 10 38 10.1 .38 10.2 .38 10.3 .39 10.4 39 10.5 39 KS C IEC 60079 30 2:2008 30 2: , Explosive atmospheres Part 30 2: Electrical resistance trace heating Application guide for design, installation and maintenance 2007 1 IEC 60079 30 2, Ex
4、plosive atmospheres Part 30 2: Electrical resistance trace heating Application guide for design, installation and maintenance . 1 KS C IEC 60079 0 . , , . , . IEC 60079 31 1 . 2 . . ( ) . KS C IEC 60079 0: 2004, 0: KS C IEC 60079 1: 2001, 1: d KS C IEC 60079 7: 2001, 7: e KS C IEC 60079 10: 2002, 10
5、: 3 . KS C IEC 60079 30 2:2008 2 IEC 60050 4261) . 4 4.1 KS C IEC 60079 14 IEC 60079 17 . , (KS C IEC 6007910) . KS C IEC 60079 0 (1 2 ), (IIA, IIB, IIC) . , . (skid unit) , . . 4.2 . . , . . , - . / . 4.3 4.3.1 I . . . . (dead-leg) (6.13 ). 4.3.2 II 1) IEC 60050(426), (IEV) 426: KS C IEC 60079 30 2
6、:2008 3 . ( ) . 4.3.3 III . RTD , . . III . 4.4 , . 4.3 1 . 1 ? I II III = (C-) C-1 C-II C-III = (NC-) NC-1 NC-II NC-III , , , . / , . “ ” . . 5 5.1 , . . . . KS C IEC 60079 30 2:2008 4 . , , . . 5.2 . . . (expanded silica) (mineral fibre) (cellular glass) (urethane) (fibreglass) (calcium silicate)
7、Polyisocyanurate (perlite silicate) ( ) , . , . , . ( , , ) . . . 5.3 . . , . KS C IEC 60079 30 2:2008 5 , (mastic) . “S” . ( 1 ). , . . . 1 5 2 6 3 7 4 8 1 KS C IEC 60079 30 2:2008 6 5.4 . (nominal insulation thickness) . . 5.5 . . . . 2 . . KS C IEC 60079 30 2:2008 7 1 6 2 7 3 8 4 9 5 ( ) 2 6 6.1
8、. , . ( ) KS C IEC 60079 30 2:2008 8 . . , . , . . 6.2 . a) . 6.3 . b) . 6.4 . c) a) b) 6.5 . , KS C IEC 60079 30 1 . . , . 6.3 . q = kT (1) q : (W/m) T : (Tp) (Ta) ( ) k : . (W/m K). k , , . . , . (1) . =12apIn)(2DDTTKq(2) KS C IEC 60079 30 2:2008 9 q : (W/m) Tp : () Ta : () D1 : (m) D2 : (m) K : (
9、W/m K) , . o3co3223112i1112ln2ln1)(hDhDKDDKDDhDTTqap+= (3) D2 : (m), ( ) D3 : (m) K1 : ( W/m K) K2 : (W/m K) hi : (W/m2K) hco : (W/m2K) ho : (W/m2K), (50 , 5 W/m2K10 W/m2K .) . . , , . 6.4 , . . )()()(ln asccfc11afcaicTTUqhVPTTUqTTUqHt+= (4) U: o3co3223112i1112ln2ln11hDhDKDDKDDhDU+= (5) KS C IEC 600
10、79 30 2:2008 10 H: , , , . UVCPVCPVCPHc3p33c2p22c1p115.0+= (6) P1 : ( ) (kg/m3) Cp1 : (J/kg K) Vc1 : (m3/m) P2 : (kg/m3) Cp2 : (J/kg K) Vc2 : (m3/m) P3 : (kg/m3) Cp3 : (J/kg K) Vc3 : (m3/m) Ti : ( ) Tf : ( ) Ta : ( ) Tp : ( ) t : (s) U : (W/m K) H : (s) Tsc : ( ) hf : (J/kg) qc : (W/m) , , . . . , (
11、flange), , , , . . . , . 6.5 , . 10 % 25 % . . . KS C IEC 60079 30 2:2008 11 a) b) c) d) e) f) 6.6 . a) ( ). b) ( .) c) . , . . . . . 8.5.5 KS C IEC 60079 30 1 6.1 . , . , , . , KS C IEC 600790 30 1 5. . . . . , , , . , . , , . 6.6.1 . . . (MI) KS C IEC 60079 30 2:2008 12 . , . . . PTC (6.7.1 .) . PTC , . 6.6.2 , . , , (7. ) . 3 PTC . . (80 ) (32 W/m) . PTC 50