ANSI CSA NGV2:2000 pdf free.BASIC REQUIREMENTS FOR COMPR ESSED NATURAL GAS VEHICLE (NGV) FUEL CONTAINERS.
Ultraviolet Resistance of Extemnal Coatings. Procctive coatings rquirvd to mcc soction 18.4 (Environmcntal Tcst) shall be cvalualcd for resistance to ulraviolat ellxcts using a minimum 1000 hours cxposurc in acordance with ASTM G53, Standard Practice for Operating LighI- (ud Wuler-Exposure Apparalus (Fluorescent UV-Condensation Type) for Exposure 0[ Nonmetallic Muterials. There shall bec n0) cvidencc of blistering, CTacking, dhalking or soltcning. Fibers. Stuructural rcinfiorcing filanent matcrial typcs shall be glass fiber, aramid fber or carbon fiber. If carbon fibcr rinforcmcnt is uscd, uhe dcsign shall incorporalc mcans to prevcnt galvanic corrosion of mcallic componcnts of thc fucl containct. Resins. Thc malcrial for imprcgnation may be thcrmoscting or thermoplastic resin. Examples of suitablc matrix matcrials are cpoxy, mdificd cpoxy, polycsta and vinylcstcr thcrmoscting plastics, and polyethylenc and polyamide thcrmoplastic matcrial. Rcsin system materials shall be tcsicd on a samplc tcst pancl, represcntalive of the conpxsitc oVerwTap, in accordancc with ASTM D2344, Standard Test Method for Appurent Interluninctr Slheur Stnength of Purullel Filxer Composites by Shorl-Bean Methou. Following a 24 hour walcr boil, 山colipAsitc shaUI hiave a nininum shcar surcngth of 13.8 MP:a (2(X) psi). Nonmetallic Liners (Type NGV2-4). 1hc nonmctallic lincr macnial shall bc compatible with the scrvicc conditions spccificd in Sccion 4. Thc solicning tcmpcralurc shall bc at lcast 90°C (194°F), and the meluing tcmpcraturc at least 100C (212°F)， whcn cstcd in accordancc with the mcuhod dcscribcd in ISO 306, Determinalion of Vical Softening Temperature, or using an altcmauivc mchod. The tcnsilc yicld strcngth and uluimalc clongation sh:all be dclcmincud in accordancc wiuh ASTM D)638, Stundard Test Method for Tensile Properties of Plcstics.Acceplablc malcnials incude siocl alloys, stainless stccl aloys, nickcl alloys, and aluminum alloys. Stccl and stainlcss siccl alloys must mcct thc raquircmcnls o[ soction 6.2.3. Aluminun alloys must mccl thc raquircments of sctions 6.2.5 {Sustaincd Load Cracking (SLC) Test for Aluminum] and 6.2.6 (Corosion Tests for Aluminum). Austcnitic stainless stccls shall bc tcstcd for rcsistancc to chlonidc surcss corrosion crackiag.ANSI CSA NGV2 pdf download.