ANSI CSA NGV2:2000 pdf free download – BASIC REQUIREMENTS FOR COMPR ESSED NATURAL GAS VEHICLE (NGV) FUEL CONTA INERS
3. DEFINITIONS
Accredited Registrar. A qualicd organization accreditcd by a national or intcmational body (c.g.. the Rcgisrur Accrliation Bvard in uhe US. (RABI) as opcrating a ccrtifcation systcm (c.g. in acordancc with BS 7512. Generual Crieriu for Cnrijicution Bodies Operating Qulity Systems Cerifcution-Criteria Jor Teechnicual (uld Munagement Competence) uhal providcs third-party asscssmcnl, critficauon, and rcgistration 0f supplicrs’ quality systcms 10 applicablc sandards (i.c, the ANSUASQC Q9000 Series, Quality: Mwagenen cwd Qlulit’ Assurwnce Suwndards). The rcgiturar’s scope of accreditation is dcscribed by the accrediuing body for particular indusury soclors (C.g. Standard Industrial Classification [SIC]). The rcgistrar is thercby aubhorivcd t0 issuc acrcdilcd crilicalcs of registration 10 supplicrs in the rowognizecd industry. Autofrettage. A pressurc applicaion proccdurc, uscd in manufacturing compositc cylinders with mctal lincrs, which srains the line past is yicld point sufficicnly to cause pennancnt plastic dcformation which results in thc lincr having compressivc strcsscs and the fbers having tcnsilc stresscs al zcrO intcrnal pressurc.
Composite. A lilamenl and rsin system. Destroyed. Physicully macie ponnauncnuly unusablc. Hoop Wrapped. Rcinforvemcnt by a compositc macrial applicd in a substantially circumlfcrential paltcrm ovcr thc cylindnical porion of thc lincr so hat Uhc filamcnt docs not transmit any significant stresscs in a dircction parallcl (0 conlaincr longitudinal axis. Leakage. Rcleasc oI contents trough a dcfcct or crack (ScC“Rupturc”). For purposcs of his standard, lcakagc is auyhing in cxcess of 0.25cchour pcr litcr of watcr capacity. Liner. Inncr gas uight containcr or gas conainc 10 which the overwrap is applicd. Maximum Senvice Temperature. The maxinum tcmperaturc 10 which the containcr will bc subjealcd in nomxal scrvicc. Full Wrapped. Mhe rcinforccmcnt by a compositc malcrial applicd OVCr uhe entirc liner including the domcs. Fold. The pl:cc wherc IW0 mclal flows mecl in such a manncr as 10 crealc a sharp, visual groovc. The groovC of he fold will always bc along thc lcngth of the containcr and usually in thc domc arca. Pre-strussing. 1hc proess which puls the lincr in compression. This can be donc cither by autofrcttage or by winding a cannpusice malcrial unxdar significant contolled ucnsion. Pressure Relief Device. A prcssurc and/or tcmpcraturc activatcd device uscd to vcnt uhe containcr contents, and thcrcby prcvcnt rupturc of an NGV fucl conlaincr when subjcclod t0 a standard fire test
Autofrettage Pressure. The pressure l0 which a container is uaken wiuh the intcnt of yiclding the liner or inncr surfacc of thc container. Thc autofrettage opcration is considercd to be part of the manufacturning operation and is conducacd pnior l0 proof tcsting. Burst Pressure. The highast pressurc rcachod in a containcr during a burst test. Fill Pressure. The prcssurc attained at the aCual time of flling. Fl pressure varics according 10 the gas tenpcraturc in thc containcer, which is dependcnt on uhe flling paramclcrs and the ambicnt conditions. Th maximum ill pressurc shall not excood 125 prccnt of servicc prassurc. Hydrostatic Pressure. TMhc pressure to which a container is uaken during acccplancc tcsting. Measuremcnt of permanent volumcric expansion and total volumctric expansion are taken during this 1testing. (Scc Compressed Gas Association CGA C-I, Methods for Hydrosiatic Testing of Compressed Gas Cylinders.) Minimun Required Burst Pressure. The minimum burst pressurc which must bc met during a burst tcsl. This is thc grcatcr of 2.25 timcs the scrvicc prcssurc or the pressure nccded lo dmonsuralc raquircd strcss ratio.