1、StandardTest MethodDetermining Corrosive Properties of Cargoesin Petroleum Product PipelinesThis NACE International standard represents a consensus of those individual members who havereviewed this document, its scope, and provisions. Its acceptance does not in any respectpreclude anyone, whether he
2、 has adopted the standard or not, from manufacturing, marketing,purchasing, or using products, processes, or procedures not in conformance with this standard.Nothing contained in this NACE International standard is to be construed as granting any right, byimplication or otherwise, to manufacture, se
3、ll, or use in connection with any method, apparatus, orproduct covered by Letters Patent, or as indemnifying or protecting anyone against liability forinfringement of Letters Patent. This standard represents minimum requirements and should in noway be interpreted as a restriction on the use of bette
4、r procedures or materials. Neither is thisstandard intended to apply in all cases relating to the subject. Unpredictable circumstances maynegate the usefulness of this standard in specific instances. NACE International assumes noresponsibility for the interpretation or use of this standard by other
5、parties and acceptsresponsibility for only those official NACE International interpretations issued by NACEInternational in accordance with its governing procedures and policies which preclude theissuance of interpretations by individual volunteers.Users of this NACE International standard are respo
6、nsible for reviewing appropriate health, safety,environmental, and regulatory documents and for determining their applicability in relation to thisstandard prior to its use. This NACE International standard may not necessarily address allpotential health and safety problems or environmental hazards
7、associated with the use ofmaterials, equipment, and/or operations detailed or referred to within this standard. Users of thisNACE International standard are also responsible for establishing appropriate health, safety, andenvironmental protection practices, in consultation with appropriate regulator
8、y authorities ifnecessary, to achieve compliance with any existing applicable regulatory requirements prior to theuse of this standard.CAUTIONARY NOTICE: NACE International standards are subject to periodic review, and may berevised or withdrawn at any time without prior notice. NACE International r
9、equires that action betaken to reaffirm, revise, or withdraw this standard no later than five years from the date of initialpublication. The user is cautioned to obtain the latest edition. Purchasers of NACE Internationalstandards may receive current information on all standards and other NACE Inter
10、nationalpublications by contacting the NACE International Membership Services Department, 1440 SouthCreek Drive, Houston, Texas 77084-4906 (telephone +1 281228-6200).Revised 2001-03-10Approved January 1972Revised 1976Reaffirmed March 1986Reaffirmed September 1993NACE International1440 South Creek Dr
11、iveHouston, TX 77084-4906+1 281/228-6200ISBN 1-57590-118-82001, NACE InternationalNACE Standard TM0172-2001Item No. 21204TM0172-2001NACE International i_ForewordInterior surfaces of petroleum product pipelines are subject to general surface corrosion caused bytraces of moisture condensed from the pr
12、oducts. Rusting can be prevented with corrosioninhibitors. Usually, the amount of protection provided to the pipeline is proportional to the inhibitorconcentration in the fuels being transported. More protection is required in a static line than in aflowing line.The purpose of this standard test met
13、hod is to provide a uniform method of testing the corrosiveproperties of petroleum product pipeline cargoes. This standard provides guidelines forperforming the test method described in ASTM(1)D 665,1modified so that it is applicable togasoline and other petroleum products, and so that it permits an
14、alysis within a single working day.This short test is particularly applicable to a batch control procedure because of the need forprompt release of cargoes and because time is limited during the working day. This standard testmethod is intended to be used by corrosion engineers, corrosion technician
15、s, corrosionconsultants, scientists, and others concerned with determining the antirust properties of gasolineand distillate fuels for transport through petroleum product pipelines.This standard was originally published in 1972 and revised in 1976 by Unit Committee T-3P onInternal Corrosion of Produ
16、ct Pipelines and Tanks. It was reaffirmed with editorial changes in1986 and 1993 by Unit Committee T-10E on Internal Corrosion of Pipelines, and revised in 2001by Task Group 042. Task Group 042 is administered by Specific Technology Group (STG) 09 onMeasurement and Monitoring Techniques and is spons
17、ored by STG 62 on Testing and MonitoringProcedures. It is issued under the auspices of STG 09 on Measurement and MonitoringTechniques.In NACE standards, the terms shall, must, should, and may are used in accordance with thedefinitions of these terms in the NACE Publications Style Manual, 4th ed., Pa
18、ragraph 7.4.1.9. Shalland must are used to state mandatory requirements. Should is used to state something consideredgood and is recommended but is not mandatory. May is used to state something consideredoptional._(1)American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, West Cons
19、hohocken, PA 19428-2959._TM0172-2001ii NACE International_NACE InternationalStandardTest MethodDetermining Corrosive Properties of Cargoesin Petroleum Product PipelinesContents1. General 12. Test Specimen Preparation . 13. Test Equipment and Apparatus 24. Testing Procedures 55. Rating of Test Specim
20、en . 56. Safety Precautions 6References 6FiguresFigure 1: Test Specimen. 1Figure 2: Testing Apparatus 3Figure 3: Test Beaker Cover. 4_TM0172-2001NACE International 1_Section 1: General1.1 This standard provides a procedure for conducting atest to determine the corrosive properties of gasoline anddis
21、tillate fuels in preparation for transport through a pipeline.Also included is information on test specimen preparation,equipment, and a system for rating the test specimens.1.2 In this test method, the surface of a cylindrical steel testspecimen is prepared and then immersed in a mixture ofthe test
22、 fuel and distilled water. The mixture is stirred and ismaintained at a prescribed temperature. The test specimenis then rated by the proportion of test surface that hascorroded. Experience has shown that if enough inhibitor ispresent to produce B+ or better results as defined in thisstandard, gener
23、al corrosion in flowing pipelines may becontrolled.1.3 This test method does not predict corrosiveness in thestanding aqueous phase, nor does it predict microbiologicalattack._Section 2: Test Specimen Preparation2.1 The test specimen should be a threaded steel rod 81.0x 12.7 mm (3.19 x 0.500 in.) (s
24、ee Figure 1), usedwith a plastic or polytetrafluoroethylene (PTFE) holder.FIGURE 1: Test SpecimenThe test specimen should be a threaded steel rod used with a plastic holder (ASTM D 665).Copyright ASTM.Reprinted with permission.2.1.1 The test specimen should be made of steelconforming to UNS(2)G10150
25、 (Grade 1015), UNSG10180 (1018), UNS G10200 (1020), or UNS G10250(1025) of ASTM A 108.22.1.2 If these steels are unavailable, other equivalentsteels may be used, provided that they aresatisfactory according to comparative tests using thistest method.2.1.3 All test specimens must be tested to establi
26、shtheir corrosion activity in comparative tests using thistest method.2.2 The test specimen, either new or from a previous test,shall be prepared as follows:2.2.1 Preliminary Grinding2.2.1.1 If the test specimen has been usedpreviously but is free from rust or otherirregularities, preliminary grindi
27、ng may be omittedand the test specimen subjected only to finalsurface preparation as prescribed in Paragraph2.2.2._(2)Metals and Alloys in the Unified Numbering System (latest revision), a joint publication of the American Society for Testing and Materials(ASTM) and the Society of Automotive Enginee
28、rs Inc. (SAE), 400 Commonwealth Drive, Warrendale, PA 15096-0001.12.7 mmDIA(0.500 in.)12.7 mm(0.500 in.)81.0 mm(3.19 in.)RADIUS 3.18 mm(0.125 in.)BREAK SHARPCORNERS30oM6XI6.4 mm (0.25 in.)RADIUS 0.41 mm(0.016 in.)TM0172-20012 NACE International2.2.1.2 If the test specimen is new or if any part ofits
29、 surface shows rust or other irregularities, itshould be cleaned with ASTM precipitationnaphtha (see ASTM D 913) or acetone to removeinhibitor, oily residues, and water. The testspecimen may be stored in a dry laboratoryatmosphere until ready to grind for use. All visibleirregularities, pits, and sc
30、ratches shall be removedfrom the surface of the test specimen by filing orgrinding with abrasive cloths.2.2.1.3 After cleaning with naphtha or acetone,the test specimen shall not be touched by hand atany stage until the test is complete. Forceps, aclean lint-free cloth, or a dry tissue may be used.2
31、.2.1.4 The test specimen should be mounted inthe chuck of the grinding and polishing apparatusand rotated at a speed of 1,700 to 1,800 rpm whilethe abrasive cloth is applied (see Paragraph3.1.7). Old cloth may be used to remove rust ormajor irregularities, but the grinding shall becompleted with a n
32、ew cloth.2.2.1.5 The final abrasion should be doneimmediately, or the test specimen should beremoved from the chuck and stored in isooctaneor in a desiccator until needed.2.2.1.6 Reused test specimens should bediscarded when the diameter is reduced to 9.53mm (0.375 in.).2.2.2 The following procedure
33、s shall be used for thefinal surface preparation of the test specimen. Finalsurface preparation should be done immediately beforethe test is to be conducted.2.2.2.1 If preliminary grinding has just beencompleted, stop the motor that rotates the testspecimen. Otherwise, remove the test specimenfrom s
34、torage, dry it with a clean lint-free cloth, andplace it in the chuck.2.2.2.2 Rub a new piece of abrasive cloth (seeParagraph 3.1.7) longitudinally over the static testspecimen until the entire surface, including therounded end, shows visible scratches.2.2.2.3 Rotate the test specimen at a speed of1
35、,700 to 1,800 rpm and abrade by wrapping theabrasive cloth halfway around the test specimen.Pull the loose ends of the cloth down with firm butgentle pressure for 1 to 2 minutes to produce auniform, finely scratched surface free fromlongitudinal scratches.2.2.2.4 To ensure that the flat shoulder of
36、thethreaded coupons (that portion of the testspecimen perpendicular to the threaded stem) isfree of corrosion products, abrade the area byholding a strip of abrasive cloth between thechuck and the shoulder while rotating the testspecimen for a brief period.2.2.2.5 Complete the final stages of prepar
37、ationwith new abrasive cloth (see Paragraph 3.1.7).2.2.2.6 Remove the test specimen from the chuckwithout directly touching it and remove any fineparticles by striking the test specimen sharply on aclean surface, wiping lightly with a clean, dry, lint-free cloth or tissue, or by brushing lightly wit
38、h acamel-hair brush.2.2.2.7 Attach the test specimen to a plasticholder and then rinse thoroughly with eithertoluene or xylene followed by acetone. All solventsused should be free of water contamination(technical or better grade). The test specimenshould then be rinsed with isooctane and placedimmed
39、iately in the hot fuel sample to be tested orplaced into a clean test tube containing isooctane.The test specimen may later be removed from thistube and allowed to drain briefly before beingplaced in the hot test fuel.2.2.2.7.1 Note: The extent of test specimenrinsing after final polishing has beene
40、xpanded to prevent residual materials fromthe polishing process from contaminating thetest specimen surface or test beaker._Section 3: Test Equipment and Apparatus3.1 The apparatus shall consist of the following:3.1.1 Temperature-measuring device: A temper-ature-measuring device shall be used.3.1.2
41、Bath: A thermostatically controlled bathcapable of maintaining a temperature in the testsample of 38 1C (100 2F) shall be used. Thebath shall have a cover with holes to accommodatethe test beakers and the temperature-measuringdevice (see Figure 2).3.1.3 Beaker: A modified, 400-mL (13.5-oz fluid),Ber
42、zelius-type glass beaker that is heat resistant anddoes not have a pour spout (see Figure 2) shall beused. It should be approximately 127 mm (5.00 in.)high when measured inside the beaker at the center ofthe base. The inside diameter should be approximately71 mm (2.8 in.). The modification consists
43、of twoTM0172-2001NACE International 3vertical baffles that are 180 degrees from each otherand protrude 10 mm (0.40 in.) into the beaker. Thebaffles should be 102 mm (4.00 in.) in length and beginabout 14 mm (0.55 in.) from the bottom of the beaker.Borosilicate glass is a satisfactory material for th
44、ebeakers.FIGURE 2: Testing ApparatusTest apparatus showing beaker, solid rod test specimen, temperature-measuring device, stirrer,and beaker cover.Note: All units are in millimeters unless otherwise specified.Copyright ASTM.Reprinted with permission.3.1.4 Cover: A flat beaker cover of glass orpolyme
45、thyl methacrylate resin shall be used (seeFigure 3). It shall be held in place by suitable means(e.g., a rim or groove). An inverted Petri dish makes asuitable cover because its sides hold the dish in a fixedposition over the beaker.3.1.4.1 Two holes should be located on anydiameter of the cover. On
46、e shall accommodate astirrer 11.66 to 12.17 mm (0.4590 to 0.4790 in.) indiameter with its center 6.1 to 6.6 mm (0.24 to0.26 in.) from the covers center. The other holeshould be on the opposite side of the coverscenter to accommodate the test specimenassembly. This assembly should be 17.6 to 18.1mm (
47、0.693 to 0.713 in.) in diameter with its center15.62 to 16.13 mm (0.6150 to 0.6350 in.) from thecenter of the cover.3.1.4.2 To accommodate a temperature-measuring device, a third hole 11.66 to 12.17 mm(0.4590 to 0.4790 in.) in diameter shall becentered 22.0 to 22.5 mm (0.865 to 0.885 in.) fromthe ce
48、nter of the cover and on a diameter at rightangles to the diameter through the other twoholes.THERMOMETERHOLE0.8 mm (0.03 in.) DIAPIN12.7 mm (0.500 in.) DIA6.1 mm (0.24 in.) DIASTIRRERTESTSPECIMENASSEMBLY70.0 mm (2.75 in.) APPROXINSIDE DIA MIDWAY0.61 mm(0.024 in.)THICK127 mm(5.00 in.)APPROX13-15 mm(0.51 0.59 in.)6.1 mm(0.24 in.)25.4 mm2 mm(0.08 i
