ASTM A972 A972M-2000(2010) Standard Specification for Fusion Bonded Epoxy-Coated Pipe Piles《熔焊的环氧树脂涂层的管桩的标准规范》.pdf

1、Designation: A972/A972M 00 (Reapproved 2010)Standard Specification forFusion Bonded Epoxy-Coated Pipe Piles1This standard is issued under the fixed designation A972/A972M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of

2、 last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers pipe piles with protectivefusion-bonded epoxy powder coating applied by the electro-static

3、spray, flocking, or fluidized bed process.NOTE 1The coating applicator is identified throughout this specifica-tion as the manufacturer.1.2 Other organic coatings may be used provided they meetthe requirements of this specification.1.3 Requirements for the powder coating are contained inAnnex A1.1.4

4、 This specification is applicable for orders in either SIunits (as Specification A972M) or inch-pound units as Speci-fication A972. The values stated in either SI or inch-poundunits are to be regarded as standard. Within the text, theinch-pound units are shown in brackets.1.5 The following precautio

5、nary statement refers to the testmethod portion only, Section 8, of this standard: This standarddoes not purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determi

6、ne the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2A252 Specification for Welded and Seamless Steel PipePilesB117 Practice for Operating Salt Spray (Fog) ApparatusD4060 Test Method for Abrasion Resistance of OrganicCoatings by the Taber AbraserG8 Te

7、st Methods for Cathodic Disbonding of PipelineCoatingsG12 Test Method for Nondestructive Measurement of FilmThickness of Pipeline Coatings on SteelG14 Test Method for Impact Resistance of Pipeline Coat-ings (Falling Weight Test)G20 Test Method for Chemical Resistance of PipelineCoatings2.2 American

8、Petroleum Institute Specification:3API RP 5L7 Recommended Practice for Internal Fusion-Bonded Epoxy Coating of Line Pipe2.3 National Association of Corrosion Engineers Stan-dards:4TM0175 Visual Standard for Surfaces of New Steel Cen-trifugally Blast Cleaned with Steel Shot or Steel Grit(NACE No. 2)R

9、P0490 Holiday Detection of Fusion-Bonded Epoxy Exter-nal Pipeline Coatings of 250 to 750 m (10 to 30 mils)2.4 Steel Structures Painting Council Standards:5SSPC VIS 1 Visual StandardsSSPC-SP1 Surface Preparation Specification No. 1: SolventCleaningSSPC-SP10 Near White Blast Cleaning3. Ordering Inform

10、ation3.1 Orders for pipe piles under this specification mayinclude the following information:3.1.1 Specification for designation and year of issue,3.1.2 Size (pipe pile outside diameter and nominal wallthickness),3.1.3 Quantity.3.1.4 Length,3.1.5 Portions to be coated (full length or distance fromen

11、d),3.1.6 Requirements for certifications (see 4.1 and 12.1),3.1.7 Requirements for material samples (see 4.3),3.1.8 Requirements for patching material (see 4.4),3.1.9 Requirements for visual standards for surface cleaningcomparison (see 5.1),3.1.10 Requirements for test frequency (see 8.1, 8.2), and

12、3.1.11 Requirements for inspections at the manufacturingplant (see 10.1).1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is under the direct responsibility ofSubcommittee A01.09 .Current edition approved April 1, 2010. Published Aug

13、ust 2010. Originallyapproved in 1997. Last previous edition approved in 2004 as A972/A972M00(2004). DOI: 10.1520/A0972_A0972M-00R10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume inform

14、ation, refer to the standards Document Summary page onthe ASTM website.3Available from American Petroleum Institute (API), 1220 L. St., NW, Wash-ington, DC 20005-4070, http:/www.api.org.4Available from NACE International (NACE), 1440 South Creek Dr., Houston,TX 77084-4906, http:/www.nace.org.5Availa

15、ble from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor,Pittsburgh, PA 15222-4656, http:/www.sspc.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Materials and Manufacture4.1 Steel pipe piles to be coated shall

16、 meet the requirementsof Specification A252 as ordered.NOTE 2Surface conditions such as slivers, gouges, laminations, pits,and sharp edges may cause coating application difficulties and effortshould be made to hold these conditions to a minimum.4.2 The powder coating shall meet the requirements list

17、ed inAnnex A1 and shall be approved by the purchaser.4.2.1 If specified in the order, a written certification shall befurnished to the purchaser that properly identifies the suppliedpowder coating, batch designation of each batch used in theorder, quantity represented, date of manufacture, name anda

18、ddress of manufacturer, and states that the powder coating,meets the requirements of Annex A1.4.3 If specified in the order, a representative 0.2 kg 8 oz.sample from each batch of the powder coating shall be suppliedto the purchaser. The sample shall be packaged in an airtightcontainer and identifie

19、d by batch designation.4.4 Patching material shall be compatible with the powdercoating and recommended by the manufacturer of the powdercoating. If specified in the order, patching material shall besupplied to the purchaser.5. Surface Preparation5.1 Prior to blast cleaning, the surfaces of steel pi

20、pe piles tobe coated shall be precleaned, as required, in accordance withSSPC-SP1. Steel surfaces shall be cleaned by abrasive blastcleaning to near-white metal in accordance with SSPC-SP10.The cleaning media used shall produce an anchor patternprofile of 38100 m 1.54.0 mils. Either of the following

21、visual standards of comparison shall be used to define the finalsurface condition: SSPC VIS 1 or NACE TM0175. Expendedblasting media debris and dust shall be removed from blastedsurfaces prior to applying the powder coating.5.2 Prior to application of the fusion-bonded epoxy powdercoating, raised sl

22、ivers, scabs, laps, sharp edges, or seams shallbe removed using abrasive grinders. No individual area ofgrinding shall exceed 230 cm236 in.2. The total area ofgrinding shall not exceed 1 % of the total surface area.NOTE 3Pipe piles with excessive grinding should be reblasted prior tocoating to estab

23、lish a suitable anchor pattern in the ground area.6. Coating Application6.1 The powder coating shall be applied to the cleaned steelsurfaces before visible oxidation occurs, but not exceeding 3 hafter cleaning.6.2 To achieve the required coating thickness (see 7.1), thesteel shall be preheated prior

24、 to applying the powder coating inaccordance with the powder coating manufacturers writtenrecommendations. The heat source shall not leave a residue orcontaminant on the steel surfaces. If oxidation occurs, the steelshall be cooled to ambient temperature and recleaned beforeapplying the powder coati

25、ng.6.3 The powder coating shall be applied and cured inaccordance with the powder coating manufacturers writtenrecommendations.6.4 Areas of pipe piles not requiring coating to allow forwelding or other purposes shall be specified by the purchaserand shall be blocked-out during the coating applicatio

26、n.7. Requirements for Coated Pipe Piles7.1 Coating Thickness:7.1.1 The minimum coating thickness after curing on thepipe piles shall be 300 m 12 mils.7.1.2 The coating thickness shall be measured in accordancewith Test Method G12 following the instructions for calibra-tion and use recommended by the

27、 thickness gage manufacturer.7.2 Coating Continuity:7.2.1 Holiday detection shall be performed on each coatedpipe pile in accordance with NACE RP0490 or a 67.5 V directcurrent, 80-k V wet-sponge holiday detector in conjunctionwith a wetting agent.7.2.2 Holidays detected shall be patched in accordanc

28、e withthe patching material manufacturers written recommenda-tions.8. Test Frequency8.1 Measure the coating thickness on a minimum of every10thpipe pile.8.2 Test the coating continuity over the entire coated surfaceof each pipe pile.9. Permissible Coating Damage and Repair of DamagedCoating9.1 Coati

29、ng damage to pipe piles due to handling or othercauses shall be repaired in the manufacturers plant withpatching material prior to shipment.9.2 The areas of coating damage shall be prepared for theapplication of patching material by cleaning the damaged area,removing the damaged coating using grinde

30、rs or other suitablemeans, feathering the adjacent coating, and removing allremaining residue or dust.9.3 The application of the patching materials to the dam-aged areas shall be in accordance with the patching materialmanufacturers written recommendation.10. Inspection10.1 The purchasers representa

31、tive (inspector) shall beallowed entry to the area of the manufacturers plant wherework on the purchasers order is being performed during timesof operation. The manufacturer shall afford the inspector allreasonable facilities to satisfy that the material is beingfurnished in accordance with this spe

32、cification.10.2 The inspector shall be allowed to select completed pipepiles randomly for inspection and testing in the manufacturersplant. Such inspections and tests conducted by the inspectorshall not interfere unnecessarily with the manufacturers op-eration.11. Rejection11.1 Coated pipe piles rep

33、resented by test specimens that donot meet the requirements of this specification shall be re-jected. At the manufacturers option, rejected sections shall bereplaced, or may be stripped of coating, cleaned, recoated, andA972/A972M 00 (2010)2resubmitted for acceptance testing in accordance with there

34、quirements of this specification.12. Certification12.1 Upon request by the purchaser, the manufacturer shallfurnish, at the time of shipment, written certification that thecoated sections meet the requirements of this specification.13. Handling, Packaging and Shipping13.1 Coated pipe piles shall not

35、 be dropped, dragged, orhandled in any manner that will result in damage to the coating.Equipment for handling coated sections shall have paddedcontact areas.13.2 Pipe piles shall be stored off the ground on supportsthat prevent excessive deflection. Stacked pipe piles shall beisolated with suitable

36、 separators to prevent coating damage.13.3 Bundling bands for packaging and tie-down bands forshipping shall be padded or made of material that shall notdamage the coating. Pipe piles shall be supported duringshipping in a manner that prevents impact damage to thecoating and excessive deflection.14.

37、 Keywords14.1 corrosion resistance; fusion-bonded epoxy powdercoating; pipe pilesANNEX(Mandatory Information)A1. QUALIFICATION OF ORGANIC COATINGS FOR PIPE PILINGA1.1 ScopeA1.1.1 This specification covers qualification requirementsfor a barrier epoxy powder coating for protecting pipe piling.A1.2 Co

38、ating MaterialA1.2.1 The coating material shall be a 100 % solids, heatcurable, thermosetting, epoxy powder coating.A1.2.2 At the request of the purchaser, the manufacturer ofthe fusion-bonded epoxy powder coating shall be required tocertify that products used to coat pipe piling meet the require-me

39、nts of this specification.A1.3 Coating RequirementsA1.3.1 Chemical ResistanceThe chemical resistance ofthe coating shall be evaluated according to Test Method G20by immersing coated plates in each of the following: distilledwater, an aqueous solution of 3 M CaCl2, an aqueous solutionof 3 M NaOH, and

40、 a solution saturated with Ca(OH)2.Specimens without holidays and specimens with intentionalholes drilled through the coating 6 mm 14 in. in diametershall be tested. The temperature of the test solutions shall be 246 2C756 4 F. The minimum test time shall be 45 days.The coating shall not blister, so

41、ften, lose bond, or developholidays during this period. The coating surrounding theintentionally made holes shall exhibit no undercutting duringthe 45-day period.A1.3.2 Impact ResistanceThe impact resistance of thecoating shall be tested in accordance with Test Method G14using a 16 mm 58 in. diamete

42、r tup, 300 m 12 milsminimum coating thickness ona3mm18 in. thick panel at24 6 2C756 4 F. Three tests shall be performed. Theminimum acceptable value shall be 9 J 80 in.-lb. of impactwith no visible breaks in the coating.A1.3.3 Coating FlexibilityThe flexibility of the coatingshall be evaluated by be

43、nding three 16 mm 58 in. thickpanels coated with a minimum of 0.3 mm 12 mils of coatingover a mandrel at 0 6 2C326 4 F. Tests shall beperformed in accordance with 5.3.3.1 of API RP 5L7 with anacceptance criterion of 1.5 total deflection at 0 6 2 C 32 640 F. Bends shall be visually inspected; any vis

44、ible tears orcracks in the coating at bends is cause for rejection, unlesslocated with 2.5 mm 0.1 in. of the edge of the strap.Unopened stretch marks on the coating surface do not consti-tute coating failure.A1.3.4 Abrasion ResistanceThe abrasion resistance of thecoating shall be tested by a taber a

45、braser (see Test MethodD4060), or its equivalent, using four standard steel plates forthis apparatus coated to a thickness of 0.30 to 0.35 mm 12 to14 mils and CS-10 wheels with a 1-kg 2.2-lb load per wheel.The maximum allowable weight loss shall not exceed 100 mg0.0035 oz./1000 cycles. The abrasion

46、wheels shall be cleanedafter 500 cycles.A1.3.5 Salt FogThe weathering resistance of the coatingshall be tested using a salt spray cabinet following PracticeB117 for 1000 h. The coating shall not blister, and the coatingdisbondment shall not exceed 3 mm 0.12 in, as measuredfrom the edge of the scribe

47、 area.A1.3.6 Cathodic DisbondmentThe effects of electricaland electrochemical stresses on the bond of the coating to steeland on the film integrity shall be assessed in an elevatedcathodic disbondment test. Test Method G8 shall be followedexcept that flat plates coated with the proposed material sha

48、llbe used. The drilled coating defect shall be 3 mm 0.12 in. indiameter, the electrolyte solution shall be 3 % NaCl by massdissolved in distilled water, the electrolyte solution temperatureshall be 65 6 2 C 150 6 3.6 F, and the test duration shallbe 24 hours. The average coating disbondment radius o

49、f threetest panels shall not exceed 6 mm 0.24 in. as measured fromthe edge of the intentional coating defect.A972/A972M 00 (2010)3ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users 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 rev