1、Designation: D 6268 98 (Reapproved 2003)Standard Practice forHandling, Transportation, and Storage of HFC-125,Pentafluoroethane (C2HF5)1This standard is issued under the fixed designation D 6268; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers guidance and direction to suppliers,purchasers, and users in the handli
3、ng, transportation, andstorage of HFC-125, pentafluoroethane (C2HF5).1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are for informa-tion only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its
4、 use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 6231 Specification for HFC-125, Pentafluoroethane(C2HF5)2.2 CGA Standa
5、rds:3C-1 Methods for Hydrostatic Testing of Compressed GasCylindersC-4 American National Standard Method of Marking Por-table Compressed Gas Containers to Identify the MaterialContainedC-6 Standards for Visual Inspection of Steel CompressedGas CylindersP-1 Safe Handling of Compressed Gases in Contai
6、nersSB-1 Hazards of Refilling Compressed Refrigerant (Halo-genated Hydrocarbon) Gas Cylinders2.3 U.S. Government Standards:4Code of Federal Regulations (CFR) Title 49, Part 82.106Code of Federal Regulations (CFR) Title 49, Part 173, U.S.Department of Transportation (DOT) Specifications,Shippers-Gene
7、ral Requirements for Shipping and Packag-ingsCode of Federal Regulations (CFR) Title 49, Part 178, U.S.DOT Specifications for Packagings3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 containersstorage vessel for HFC-125.3.1.2 cylinderscontainers of HFC-125.3.1.3 HFC-125pentaf
8、luoroethane, a compound used toinert or suppress a fire or explosion hazard.3.1.4 insulatedplaced in an isolated situation to protectand prevent the transfer of damage.4. Significance and Use4.1 This practice provides requirements for the handling,transportation, and storage of HFC-125 encountered i
9、n distri-bution through both commercial and military channels. It isintended to insure that HFC-125 is handled, transported, andstored in such a way its physical properties are not degraded.Transport may be by various means, such as, but not limited to,highway, rail, water, and air.5. Practice5.1 Pe
10、rsonnel shall be trained in Title 49 CFR, Part 172,Subpart H, to ensure safe handling, loading, unloading, storageand transportation of material.5.2 Handling:5.2.1 Handling shall be in accordance with CGA P-1.5.2.2 Personnel who handle or store, or both, cylinders ofHFC-125 shall be trained properly
11、 to recognize and identify thecharacteristics of the product and the proper methods of safelyhandling full, partly full, and empty cylinders.5.2.3 Facility personnel must be trained in applicable Title49 CFR, Parts 173 and 178, and the CGA documents refer-enced in 2.2.5.2.4 HFC-125 handling shall be
12、 in nonsmoking, heater-free, ventilated areas to preclude product accumulation. Provi-sions shall be made to ensure that service areas limit HFC-125concentrations to not exceed 10 % for 1 min and 0.1 % for 8 h.1This practice is under the jurisdiction of ASTM Committee D26 on Haloge-nated Organic Sol
13、vents and Fire-Extinguishing Agents and is the direct responsi-bility of Subcommittee D26.09 on Halogenated Fire Extinguishants.Current edition approved May 10, 1998. Published February 1999.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serv
14、iceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from the Compressed Gas Association.4Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20036.1Copyright ASTM Internati
15、onal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2.5 Cylinders shall not be overfilled. The maximum per-mitted filling density shall be 945 kg/m3(59 lb/ft3). The liquidportion of the liquefied gases must not completely fill thecontainers internal volume at
16、any temperature up to andincluding 54C (130F). Filling density requirement are speci-fied in Title 49 CFR, 173 and Title 49 CFR, 173.305.5.2.6 Handling of materials should be done in a manner thatprevents contamination or co-mingling of materials other thanHFC-125.5.2.7 Cylinders shall be free of di
17、rt and contamination thatwould contribute to or would cause deterioration of the productduring shipment or storage. Precautions should be taken toprevent the entry of oil, water, or any other foreign matter intothe container. Unique coatings or preservatives applied prior toshipment to protect the c
18、ontainers are not considered contami-nation.5.3 Transportation:5.3.1 Transportation shall be as specified in accordance withDOT regulations of Title 49 CFR.5.3.2 Transportation shall be in suitable vehicles to precludecylinder damage by excessive mechanical vibration, shock,freezing, or deleterious
19、high temperatures throughout the entiretransport route.5.3.2.1 If cylinders are expected to be subject to unaccept-able transport conditions, the cylinders should be placed underinsulated conditions.5.3.3 Compressed gas cylinder permanent marking require-ments shall be as specified under Part 178 of
20、 Title 49 CFR andmust be maintained in legible condition as required by Part 173of Title 49 CFR. Warning labels shall be affixed to the cylindersconforming to requirements of Part 82.106 of Title 40 CFR.5.4 Storage:5.4.1 Storage shall be in accordance with CGA P-1, inqualified cylinders in accordanc
21、e with Parts 173 and 178 ofTitle 49 CFR.5.4.2 Cylinders should be stored in areas that will protectvessels from physical and environmental damage, and tamper-ing from unauthorized personnel.5.4.2.1 Facilities should be in constructed and oriented sothat safety requirements are fulfilled for storage
22、of pressurizedcylinders.5.4.3 Storage cylinders shall be fitted with pressure releasemechanisms to limit vessel pressure to not more than the ratedworking pressure of the container in use at any particular time.5.4.3.1 Periodic hydrostatic testing and re-inspection ofcylinders used for HFC-125 shall
23、 comply with Part 173.34 ofTitle 49 CFR.5.4.4 Containers shall be clearly marked and labeled toidentify whether the HFC-125 contained conforms to Specifi-cation D 6231.5.4.5 Insulation shall be placed on pallets or shoring andprovisions should be made to prevent excessive shock orthermal fluctuation
24、s to cylinders.5.4.6 Cylinders shall be stored in a manner that will preventcontamination from external sources.6. Keywords6.1 HFC-125; Pentafluoroethane; C2HF5; compressed gas;compressed liquefied gas; cylinders; explosion suppressant;fire suppressant; handling; storage; transportNOTE 1Applicable t
25、o a container fill density of 57.5 lb/ft3only.FIG. 1 Effect of Temperature on Storage Cylinder Pressure (HFC-125 Mixed with Nitrogen)D 6268 98 (2003)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. User
26、s of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every
27、five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technica
28、l committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 6268 98 (2003)3
