1、Designation: D 5842 04Designation: Manual of Petroleum Measurement Standards (MPMS) Chapter 8.4An American National StandardStandard Practice forSampling and Handling of Fuels for Volatility Measurement1This standard is issued under the fixed designation D 5842; the number immediately following the
2、designation indicates the year oforiginal adoption or, in the case 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. Scope*1.1 This practice covers pro
3、cedures and equipment forobtaining, mixing, and handling representative samples ofvolatile fuels for the purpose of testing for compliance with thestandards set forth for volatility related measurements appli-cable to light fuels. The applicable dry vapor pressure equiva-lent range of this practice
4、is 13 to 105 kPa (2 to 16 psia).1.2 This practice is applicable to the sampling, mixing, andhandling of reformulated fuels including those containingoxygenates.1.3 The values stated in SI units are to be regarded as thestandard except in some cases where drawings may showinch-pound measurements whic
5、h are customary for that equip-ment.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its 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 limi
6、tations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 4057 Practice for Manual Sampling of Petroleum andPetroleum Products (API MPMS Chapter 8.1)D 4177 Practice for Automatic Sampling of Petroleum andPetroleum Products (API MPMS Chapter 8.2)D 5854 Practice for Mixing and Handling of Liqu
7、idSamples of Petroleum and Petroleum Products (APIMPMS Chapter 8.3)2.2 API Standards:3MPMS Chapter 8.1Practice for Manual Sampling of Pe-troleum and Petroleum Products (ASTM Practice D 4057)MPMS Chapter 8.2Practice for Automatic Sampling ofPetroleum and Petroleum Products (ASTM PracticeD 4177)MPMS C
8、hapter 8.3Practice for Mixing and Handling ofLiquid Samples of Petroleum and Petroleum Products(ASTM Practice D 5854)3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 bottom samplea sample obtained from the materialat the bottom of the tank, container, or line at its lowest poin
9、t.3.1.1.1 DiscussionIn practice the term bottom sample hasa variety of meanings. As a result, it is recommended that theexact sampling location (for example, 15 cm 6 in. from thebottom) should be specified when using this term.3.1.2 dead legssections of pipe that, by design, do notallow for the flow
10、 of material through them.3.1.2.1 DiscussionDead legs are not suitable for obtainingrepresentative samples.3.1.3 relief linessections of pipe that lead to a pressure/vacuum relief valve.3.1.3.1 DiscussionRelief lines are not suitable for obtain-ing representative samples.3.1.4 stand pipesvertical se
11、ctions of pipe or tubing ex-tending from the gaging platform to near the bottom of tanksthat are equipped with external or internal floating roofs. Standpipes also may be found on ships and barges.3.1.4.1 DiscussionStand pipes which are not slotted orperforated will not yield representative samples.
12、 Further infor-mation on proper stand pipe design is given in 6.4.3.3.1.5 Other sample definitions are given in Practice D 4057/API MPMS Chapter 8.1.1This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts and Lubricants and the API Committee on Petroleum Measurement, and
13、isthe direct responsibility of Subcommittee D02.02/COMQ, the joint ASTM-APICommittee on Static Petroleum Measurement.Current edition approved Dec. 1, 2004. Published March 2005. Originallyapproved in 1995. Last previous edition approved in 2000 as D 5842 95 (2000).2For referenced ASTM standards, vis
14、it the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from The American Petroleum Institute (API), 1220 L. St., NW,Washington, DC 20005.1*A
15、 Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Summary of Practice4.1 It is necessary that the samples be representative of thefuel in question. The basic principle o
16、f each sampling proce-dure involves obtaining a sample in such a manner and fromsuch locations in the tank or other container that the samplewill be representative of the fuel. A summary of the samplingprocedures and their application is presented in Table 1. Eachprocedure is suitable for sampling a
17、 material under definitestorage, transportation, or container conditions. The precau-tions required to ensure the representative character of thesamples are numerous and depend upon the tank, carrier,container, or line from which the sample is being obtained, thetype and cleanliness of the sample co
18、ntainer, and the samplingprocedure that is to be used.5. Significance and Use5.1 The dry vapor pressure equivalent (DVPE) of volatilemotor fuels is regulated by federal and state air pollutioncontrol agencies. In order to meet the letter of these regula-tions, it is necessary to sample, handle, and
19、test these productsin a very precise manner.6. General Comments6.1 Sample Containers:6.1.1 Sample containers are clear or brown glass bottles,fluorinated high-density polyethylene bottles, or metal cans.The clear glass bottle is advantageous because it is easilyexamined visually for cleanliness, and
20、 also makes visualinspection of the sample for free water or solid impuritiespossible. The brown glass bottle affords some protection fromlight. The only cans acceptable are those with the seamssoldered on the exterior surface.6.1.2 Cork stoppers, or screw caps of plastic or metal, areused for glass
21、 bottles; screw caps with inserted seals only areused for cans to provide a vapor-tight closure seal. Corks mustbe of good quality, clean, and free from holes and loose bits ofcork. Never use rubber stoppers. Contact of the sample with thecork can be prevented by wrapping tin or aluminum foil around
22、the cork before forcing it into the bottle. Screw caps must beprotected by a cork disk faced with tin or aluminum foil, aninverted cone polyseal or other material that will not affectpetroleum or petroleum products. The fluorinated bottles aresupplied with polypropylene screw caps.6.1.3 Sample size
23、is dictated by the test method to be used.One litre (32 oz) bottles or cans are generally used for manualvapor pressure testing. Some vapor pressure methods mayallow a smaller sample size to be taken, such as in a 125 mL(4 oz) bottle. See Fig. 1.6.1.4 All sample containers must be absolutely clean a
24、ndfree of foreign matter. Before reusing a container, wash it withstrong soap solution, rinse it thoroughly with tap water, andfinally with distilled water. Dry completely and stopper, or cap,the container immediately.6.2 Sampling ApparatusSampling apparatus is describedin detail under each of the s
25、pecific sampling procedures. Clean,dry, and free all sampling apparatus from any substance thatmight contaminate the material. If necessary, use the cleanprocedure described in 6.4.6.3 Time and Place of Sampling:6.3.1 Storage TanksWhen loading or discharging fuels,take samples from both shipping and
26、 receiving tanks, and fromthe pipelines if required.6.3.2 Ship or Barge TanksSample each product after thevessel is loaded or just before unloading.6.3.3 Tank CarsSample the product after the car is loadedor just before unloading.NOTE 1Time, place, and other details of sampling not covered in thispr
27、actice are normally determined by contractual agreement or regulatoryrequirements.6.4 Obtaining Samples:6.4.1 Directions for sampling cannot be made explicitenough to cover all cases. Extreme care and good judgment arenecessary to ensure samples that represent the general charac-ter and average cond
28、ition of the material. Use lint-free wipingcloths to prevent contaminating samples.6.4.2 Many petroleum vapors are toxic and flammable.Avoid breathing them or igniting them from an open flame ora spark. Follow all safety precautions specific to the materialbeing sampled.6.4.3 Do not sample dead legs
29、 or relief lines. Do not samplestand pipes that are not slotted or perforated. Fig. 2 is anexample of an adequately slotted stand pipe.At a minimum, thestand pipe should have two rows of slots slightly staggered inthe vertical plane.6.4.4 Rinse or flush sample containers with product andallow it to
30、drain before drawing the sample. If the sample is tobe transferred to another container (for testing other thanDVPE), the sampling apparatus also is rinsed with some of theproduct and drained. When the sample is emptied into thiscontainer, upend the sampling apparatus into the opening of thesample c
31、ontainer.TABLE 1 Summary of Gasoline Sampling Procedures andApplicabilityType of Container Procedure ParagraphStorage tanks, ship and bargetanks, tank cars, tank trucksall-levels sampling 7.2.1.2running sample 7.2.1.2upper, middle and lowersamples7.2.1.2top sample 7.2.1.2grab sampling 7.5Storage tan
32、ks with taps tap sampling 7.2.2Pipes and lines line sampling 7.3automatic sampling 7.4time proportional 7.4.1flow proportional 7.4.2grab sampling 7.5Retail outlet and wholesalepurchaser-consumer facilitystorage tanksnozzle sampling 7.6D58420426.5 Handling Samples:6.5.1 Protect all samples of light f
33、uels from evaporation.The sampling apparatus is the sample container for vaporpressure. Keep the container tightly closed after the sample iscollected. Leaking sample containers are not suitable fortesting. Cool volatile samples to 0 to 1C (32 to 34F) afterdelivery to the laboratory and before openi
34、ng the container.Maintain at this temperature throughout transfer and handling,if at all possible.6.5.2 Never completely fill a sample container. Fill thecontainer to 70 to 80 % capacity to allow adequate room forexpansion. Subsequent testing for vapor pressure requires thislevel of container fill.6
35、.5.3 The first sample aliquot removed is for vapor pressuretesting. The remaining sample in the container is not suitablefor a vapor pressure determination but is suitable for othertesting.6.6 Shipping SamplesTo prevent loss of liquid and vaporsduring shipment, place internal seals in the metal cont
36、ainers,screw the caps down tightly and check for leakage. Observe allshipping regulations applying to the transportation of flam-mable liquids.6.7 Labeling Sample ContainersLabel the container im-mediately after a sample is obtained. Use waterproof andoilproof ink or a pencil hard enough to dent the
37、 tag, since softpencil and ordinary ink markings are subject to obliterationfrom moisture, product, smearing, and handling. Typical labelinformation includes the following information:6.7.1 Date and time (the period elapsed during continuoussampling),6.7.2 Name of the sample (location),6.7.3 Name or
38、 number and owner of the vessel, car, orcontainer,6.7.4 Brand and grade of material; and6.7.5 Reference symbol or identification number.6.7.6 Labeling should conform to all applicable federal,state, and local labeling regulations.7. Specific Sampling Procedures7.1 Sampling ProceduresThe standard sam
39、pling proce-dures described in this practice are summarized in Table 1.Alternative sampling procedures can be used if a mutuallysatisfactory agreement has been reached by the party(ies)involved and such agreement has been put in writing andsigned by authorized officials.7.2 Tank Sampling:7.2.1 Bottl
40、e SamplingThe bottle sampling procedure isapplicable for sampling fuels of 105 kPa (16 psia) ReidFIG. 1 Nozzle Extension for Nozzle Sampling with 4 oz BottleFIG. 2 Slotted Stand PipeD5842043equivalent vapor pressure or less in tank cars, tank trucks,shore tanks, ship tanks, and barge tanks.7.2.1.1 A
41、pparatusA suitable sampling bottle as shown inFig. 3 is required. Recommended diameter of the opening inthe bottle or sample thief is 19 mm (34 in.).7.2.1.2 Procedure:(a) All-levels SampleLower the weighted, stopperedbottle (see Fig. 3) as near as possible to the draw-off level, pullout the stopper
42、with a sharp jerk of the cord or chain and raisethe bottle at a rate so that it is 70 to 85 % full as it emerges fromthe liquid.(b) Running SampleLower the stoppered container (witha hole or slot in the stopper) at a uniform rate as near aspossible to the level of the bottom of the outlet connection
43、 orswing line and immediately raise the bottle to the top of thefuel at a rate of speed such that it is 70 to 85 % full whenwithdrawn from the liquid.NOTE 2Running or all-level samples are not necessarily representa-tive because the tank volume may not be proportional to the depth andbecause the ope
44、rator may not be able to raise the sampler at the requiredrate.(c) Upper, Middle, and Lower SamplesLower theweighted, stoppered bottle to the proper depths (Fig. 4)asfollows:upper sample middle of upper third of the tank contentsmiddle sample middle of the tank contentslower sample middle of the low
45、er third of the tank contentsAt the selected level, pull out the stopper with a sharp jerk ofthe cord or chain and allow the bottle to fill completely, asevidenced by the cessation of air bubbles. When full, raise thebottle, pour off a small amount (15 to 30 %), and stopperimmediately.(d) Top Sample
46、Obtain this sample (Fig. 4) in the samemanner as specified for an upper sample but at 150 mm (6 in.)below the top surface of the tank contents.(e) HandlingCap and label bottle samples immediatelyafter taking them, and deliver to the laboratory in the originalsampling bottles. Multiple samples must b
47、e tested individuallyfor vapor pressure. A composite sample is acceptable for otheranalytical tests. Inverting the sample container can aid in leakdetection. The sample may be placed in ice immediately forcooling, if practical.7.2.2 Tap SamplingThe tap sampling procedure is appli-cable for sampling
48、liquids of 105 kPa (16 psia) DVPE, or less,in tanks that are equipped with suitable sampling taps or lines.This procedure is recommended for volatile stocks in tanks ofthe breather and balloon roof type, spheroids, floating rooftanks, and so forth. The assembly for tap sampling is shown inFig. 5.7.2
49、.2.1 Apparatus:(a) Tank TapsEquip the tank with at least three samplingtaps placed equidistant throughout the tank height. A standard14 in. pipe with a suitable valve is satisfactory. A sufficientnumber of sample taps are needed on the tank to makesampling possible at various levels.(b) TubeUse a delivery tube that will not contaminate theproduct being sampled and is long enough to reach to thebottom of the sample container to allow submerged filling.(c) Tube Chiller Assembly (Optional)If a samplingchiller is used, it is a coil of tubing immersed
