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<strong>IGC</strong> Part 1 Annex 1A Valve Outlets for Toxic Gases DOC 97/03<br />
Gas<br />
Name Chemical<br />
(former name) Formula<br />
Dinitrogentrioxide N 2O3<br />
(Nitrogen oxide)<br />
Fluorine F 2<br />
Nitrogen Monoxide NO<br />
(Nitricoxide)<br />
Nitrogen Dioxide NO 2 or N2O4<br />
Chlorine Trifluoride ClF 3<br />
Hydrogen Cyanide HCN<br />
Chloromethane CH 3Cl<br />
(methylchloride)<br />
Cyanogene (CN) 2<br />
Diborane B 2H6<br />
Coal gas<br />
Methanethiol CH 3SH<br />
(Methylmercaptan)<br />
Carbon Monoxide CO<br />
Screw thread<br />
External<br />
Right hand<br />
13.16 13.16 16.66 18 21.7 27 20.96 20.96 21.8 21,8* 22 22.91 22.92 25.4 26 26 26.16 26.44 26.44 28.57<br />
1.337 1.338 1.338 1.5 1.814 2 1.814 1.814 1.814 1.814 1.814 1.814 1.814 3.175 1.814 3 1.814 1.814 1.814 1.814<br />
GB 1/4 BSP 3/8 BSP SI W 14 WITH GB 1/2 BSP 0.86 SI 22 GB 5/8 BSP 1 BSW 26 SI 1.03 GB 3/4 BSP 1.125<br />
1/4/8 F 19 F 19 1/2/15 F 14 BSW 14 W14 5/8/16 F 14 8 W 14 14 NGO 3/4/20 F 14 14 UNS<br />
FR SP, PT<br />
DE<br />
FI, IE<br />
UK, IE DE, PT, AT, NL,<br />
UK, CH, SE<br />
IT P)<br />
SP, FI<br />
UK, IE DE, PT, AT, NL,<br />
NO, CH, SE<br />
UK, IE<br />
UK, IE IT PT, FR, SP, UK, IE<br />
DE, AT, NO, FI,<br />
CH, NL, SE<br />
IK, IE FR, CH, AT, SE,<br />
NL, DE<br />
IT<br />
UK, IE FR<br />
**SP,PT 26.1 (1.814)<br />
* SP,PT 21,8 (21.7) 6<br />
SE<br />
IT (NF)<br />
FR<br />
IT P)<br />
(M) Mandatory<br />
(P) Prefered<br />
(NF) Not Forbidden
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