ASTM D1838-2012a Standard Test Method for Copper Strip Corrosion by Liquefied Petroleum (LP) Gases《以液化石油气(LP)确定铜条腐蚀性的标准试验方法》.pdf
《ASTM D1838-2012a Standard Test Method for Copper Strip Corrosion by Liquefied Petroleum (LP) Gases《以液化石油气(LP)确定铜条腐蚀性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D1838-2012a Standard Test Method for Copper Strip Corrosion by Liquefied Petroleum (LP) Gases《以液化石油气(LP)确定铜条腐蚀性的标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D1838 12aStandard Test Method forCopper Strip Corrosion by Liquefied Petroleum (LP) Gases1This standard is issued under the fixed designation D1838; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revi
2、sion. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the detection of the presence ofcomponents in liquefied petroleum gases which can be corro-sive to cop
3、per.NOTE 1For an equivalent copper strip test applicable to less volatilepetroleum products, see Test Method D130.1.2 The values stated in SI units are to be regarded asstandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety co
4、ncerns, 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 limitations prior to use. For specificwarning statements, see 7.1, 10.3.1, and Annex A1.2. Referenced Doc
5、uments2.1 ASTM Standards:2D130 Test Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip TestD1265 Practice for Sampling Liquefied Petroleum (LP)Gases, Manual MethodD3700 Practice for Obtaining LPG Samples Using a Float-ing Piston Cylinder2.2 ASTM Adjuncts:ADJD0130, ASTM Coppe
6、r Strip Corrosion Standard forPetroleum33. Terminology3.1 Abbreviations:3.1.1 CAMICoated Abrasives Manufacturers Institute3.1.2 FEPAFederation of European ProducersAssociation4. Summary of Test Method4.1 A polished copper strip is immersed in approximately100 mL of the sample and exposed at a temper
7、ature of 37.8C(100F) for1hinacylinder of suitable working pressure. Atthe end of this period, the copper strip is removed and rated asone of the four classifications of the ASTM Copper StripCorrosion Standard (ADJD0130).5. Significance and Use5.1 Copper corrosion limits provide assurance that diffic
8、ul-ties will not be experienced in deterioration of the copper andcopper-alloy fittings and connections that are commonly usedin many types of utilization, storage, and transportation equip-ment.6. Apparatus6.1 Corrosion Test Cylinder, constructed of stainless steelwith an O-ring removable top closu
9、re according to the dimen-sions given in Fig. 1. Provide a flexible inert hose, such as onecomposed of aluminum or stainless steel, which permitsinverting the test cylinder as required in the procedure (seeNote 2). The whole assembly, including the corrosion testcylinder, shall be constructed to wit
10、hstand a minimum hydro-static test pressure of 6900 kPa (1000 psig). No leak shall bediscernible when tested at 3450 kPa (500 psig) with gas.NOTE 2Swivel connections with an adapter to fit a 6.4 mm (14 in.)pipe may be used.6.1.1 The assembly shall be tested for compliance with theminimum pressure ra
11、ting of 6900 kPa (1000 psig) by hydro-static testing, or alternative testing protocol acceptable to thelocal authority having jurisdiction, prior to first use. Additionaltesting can be required by the local authority having jurisdic-tion.6.1.2 The assembly shall be verified for gas tightness byleak
12、testing at a minimum of 3450 kPa (500 psig) with inert gasprior to first use, whenever pressure-containing components ofthe assembly are replaced, or otherwise on an annual basis.6.1.3 Note the presence and length (about 60 mm) of theoutage tube shown in Fig. 1, to provide adequate ullage forsafety.
13、 A safety pressure relief device may also be incorporatedinto the design of the corrosion test cylinder, if desired. If a1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.H0 on Liquefied Petroleum
14、 Gas.Current edition approved Dec. 1, 2012. Published March 2013. Originallyapproved in 1961. Last previous edition approved in 2012 as D183812. DOI:10.1520/D1838-12A.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
15、Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from ASTM International Headquarters. Order Adjunct No.ADJD0130.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, P
16、O Box C700, West Conshohocken, PA 19428-2959. United States1pressure relief device is incorporated, ensure that the materialsof its construction will not affect the test results.6.2 Water Bath, capable of being maintained at 37.8 60.5C (100 6 1F). Incorporate suitable supports to hold thetest cylind
17、er in an upright position. Make the bath deep enoughso that the entire cylinder and valves will be covered during thetest.6.3 Temperature Sensing Device (TSD)Capable of moni-toring the desired test temperature in the bath to within anaccuracy of 60.5C (1F) or better.6.4 Strip Polishing Vise, to hold
18、 the copper strip firmlywithout marring the edges. For convenient vises see TestMethod D130.7. Materials7.1 Wash SolventAny volatile, less than 5 mg/kg sulfur,hydrocarbon solvent may be used provided that it shows notarnish at all when tested for3hat50C (122F). 2,2,4-trimethylpentane (isooctane) of
19、minimum 99.75 % purity is thereferee solvent and should be used in case of dispute.(WarningExtremely flammable, see Annex A1.)7.2 Copper Strip, approximately 12.5 mm (12 in.) wide, 1.5to 3.0 mm (116 to18 in.) thick, cut approximately 75 mm (3 in.)long from smooth-surfaced, hard-temper, cold-finished
20、 copperof 99.9 + % purity; electrical bus bar stock is generallysuitable. Drill a 3.2 mm (18 in.) hole approximately 3.2 mm (18in.) from one end in the center of the strip. The strips may beused repeatedly but should be discarded if surfaces becomedeformed.7.3 Surface Preparation/Polishing Materials
21、00 grade orfiner steel wool; silicon carbide grit paper or cloth of varyingdegrees of fineness including 65-m grade (220-grit CAMI-grade or P220 FEPA-grade); also a supply of 105-m (120-gritto 150-grit CAMI-grade or P120 to P150 FEPA-grade) sizesilicon carbide grain or powder and absorbent cotton. A
22、commercial grade is suitable, but pharmaceutical grade cottonwool is most commonly available and is acceptable.7.4 ASTM Copper Strip Corrosion Standard (ADJD0130),Plaques are available.3Their care and inspection for stabilityare described in detail in Test Method D130.8. Preparation of Strips8.1 Sur
23、face PreparationRemove all surface blemishesfrom all six sides of the strip obtained from a previous analysis.One way to accomplish this is to use 00 grade or finer steelwool or silicon carbide paper or cloth of such degrees offineness as are needed to accomplish the desired resultsefficiently. Fini
24、sh with 65-m grade (220-grit CAMI-grade orP220 FEPA-grade) silicon carbide paper or cloth, removing allmarks that could have been made by other grades of paper usedpreviously. Ensure the prepared copper strip is protected fromoxidation prior to final preparation, such as by immersing thestrip in was
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