1、Designation: A972/A972M 00 (Reapproved 2015)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 Pipeline Coat-ingsG12 Test Method for Nondestructive Measurement of FilmThickness of Pipeline Coatings on Steel (Withdrawn2013)3G14 Test Method for Impact Resistance of Pipeline Coatings(Falling Weight Test)G20 Test Method for Chemical Resistance of Pipeline Coa
8、t-ings2.2 American Petroleum Institute Specification:4API RP 5L7 Recommended Practice for Internal Fusion-Bonded Epoxy Coating of Line Pipe2.3 National Association of Corrosion Engineers Stan-dards:5TM0175 Visual Standard for Surfaces of New Steel Cen-trifugally Blast Cleaned with Steel Shot or Stee
9、l Grit(NACE No. 2)RP0490 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:6SSPC VIS 1 Visual StandardsSSPC-SP1 Surface Preparation Specification No. 1: SolventCleaningSSPC-SP10 Near White Blast Cleanin
10、g3. Ordering Information3.1 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
11、 or distance fromend),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),1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is u
12、nder the direct responsibility ofSubcommittee A01.09 on Carbon Steel Tubular Products.Current edition approved Sept. 1, 2015. Published September 2015. Originallyapproved in 1997. Last previous edition approved in 2010 as A972/A972M00(2010). DOI: 10.1520/A0972_A0972M-00R15.2For referenced ASTM stand
13、ards, visit 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Av
14、ailable from American Petroleum Institute (API), 1220 L. St., NW,Washington, DC 20005-4070, http:/www.api.org.5Available from NACE International (NACE), 1440 South Creek Dr., Houston,TX 77084-4906, http:/www.nace.org.6Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor,Pitt
15、sburgh, PA 15222-4656, http:/www.sspc.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.9 Requirements for visual standards for surface cleaningcomparison (see 5.1),3.1.10 Requirements for test frequency (see 8.1, 8.2), and3.1.1
16、1 Requirements for inspections at the manufacturingplant (see 10.1).4. Materials and Manufacture4.1 Steel pipe piles to be coated shall meet the requirementsof Specification A252 as ordered.NOTE 2Surface conditions such as slivers, gouges, laminations, pits,and sharp edges may cause coating applicat
17、ion difficulties and effortshould be made to hold these conditions to a minimum.4.2 The powder coating shall meet the requirements listed 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 identi
18、fies the suppliedpowder coating, batch designation of each batch used in theorder, quantity represented, date of manufacture, name andaddress 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 ozsample from
19、each batch of the powder coating shall be suppliedto the purchaser. The sample shall be packaged in an airtightcontainer and identified 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
20、order, patching material shall besupplied to the purchaser.5. Surface Preparation5.1 Prior to blast cleaning, the surfaces of steel pipe 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 ac
21、cordance with SSPC-SP10.The cleaning media used shall produce an anchor patternprofile of 38 to 100 m 1.5 to 4.0 mils. Either of the followingvisual standards of comparison shall be used to define the finalsurface condition: SSPC VIS 1 or NACE TM0175. Expendedblasting media debris and dust shall be
22、removed from blastedsurfaces prior to applying the powder coating.5.2 Prior to application of the fusion-bonded epoxy powdercoating, raised slivers, scabs, laps, sharp edges, or seams shallbe removed using abrasive grinders. No individual area ofgrinding shall exceed 230 cm236 in.2. The total area o
23、fgrinding shall not exceed 1 % of the total surface area.NOTE 3Pipe piles with excessive grinding should be reblasted prior tocoating to establish a suitable anchor pattern in the ground area.6. Coating Application6.1 The powder coating shall be applied to the cleaned steelsurfaces before visible ox
24、idation occurs, but not exceeding 3 hafter cleaning.6.2 To achieve the required coating thickness (see 7.1), thesteel shall be preheated prior to applying the powder coating inaccordance with the powder coating manufacturers writtenrecommendations. The heat source shall not leave a residue orcontami
25、nant on the steel surfaces. If oxidation occurs, the steelshall be cooled to ambient temperature and recleaned beforeapplying the powder coating.6.3 The powder coating shall be applied and cured inaccordance with the powder coating manufacturers writtenrecommendations.6.4 Areas of pipe piles not req
26、uiring coating to allow forwelding or other purposes shall be specified by the purchaserand shall be blocked-out during the coating application.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 Th
27、e coating thickness shall be measured in accordancewith Test Method G12 following the instructions for calibra-tion and use recommended by the 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.
28、5 V directcurrent, 80-k wet-sponge holiday detector in conjunctionwith a wetting agent.7.2.2 Holidays detected shall be patched in accordance withthe patching material manufacturers written recommenda-tions.8. Test Frequency8.1 Measure the coating thickness on a minimum of every10thpipe pile.8.2 Tes
29、t the coating continuity over the entire coated surfaceof each pipe pile.9. Permissible Coating Damage and Repair of DamagedCoating9.1 Coating 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 coa
30、ting damage shall be prepared for theapplication of patching material by cleaning the damaged area,removing the damaged coating using grinders or other suitablemeans, feathering the adjacent coating, and removing allremaining residue or dust.9.3 The application of the patching materials to the dam-a
31、ged areas shall be in accordance with the patching materialmanufacturers written recommendation.10. Inspection10.1 The purchasers representative (inspector) shall beallowed entry to the area of the manufacturers plant wherework on the purchasers order is being performed during timesof operation. The
32、 manufacturer shall afford the inspector allreasonable facilities to satisfy that the material is beingfurnished in accordance with this specification.10.2 The inspector shall be allowed to select completed pipepiles randomly for inspection and testing in the manufacturersA972/A972M 00 (2015)2plant.
33、 Such inspections and tests conducted by the inspectorshall not interfere unnecessarily with the manufacturers op-eration.11. Rejection11.1 Coated pipe piles represented by test specimens that donot meet the requirements of this specification shall be re-jected. At the manufacturers option, rejected
34、 sections shall bereplaced, or may be stripped of coating, cleaned, recoated, andresubmitted for acceptance testing in accordance with therequirements of this specification.12. Certification12.1 Upon request by the purchaser, the manufacturer shallfurnish, at the time of shipment, written certificat
35、ion that thecoated sections meet the requirements of this specification.13. Handling, Packaging and Shipping13.1 Coated pipe piles shall not 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
36、.2 Pipe piles shall be stored off the ground on supportsthat prevent excessive deflection. Stacked pipe piles shall beisolated with suitable 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
37、the coating. Pipe piles shall be supported duringshipping in a manner that prevents impact damage to thecoating and excessive deflection.14. Keywords14.1 corrosion resistance; fusion-bonded epoxy powdercoating; pipe pilesANNEX(Mandatory Information)A1. QUALIFICATION OF ORGANIC COATINGS FOR PIPE PILI
38、NGA1.1 ScopeA1.1.1 This specification covers qualification requirementsfor a barrier epoxy powder coating for protecting pipe piling.A1.2 Coating 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
39、manufacturer ofthe fusion-bonded epoxy powder coating shall be required tocertify that products used to coat pipe piling meet the require-ments of this specification.A1.3 Coating RequirementsA1.3.1 Chemical ResistanceThe chemical resistance ofthe coating shall be evaluated according to Test Method G
40、20by immersing coated plates in each of the following: distilledwater, an aqueous solution of 3 M CaCl2, an aqueous solutionof 3 M NaOH, and 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 te
41、sted. 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, soften, lose bond, or developholidays during this period. The coating surrounding theintentionally made holes shall exhibit no undercutting duringthe 45-day perio
42、d.A1.3.2 Impact ResistanceThe impact resistance of thecoating shall be tested in accordance with Test Method G14using a 16 mm 58 in. diameter tup, 300 m 12 milsminimum coating thickness ona3mm18 in. thick panel at 246 2C756 4 F. Three tests shall be performed. Theminimum acceptable value shall be 9
43、J 80 in.-lb of impactwith no visible breaks in the coating.A1.3.3 Coating FlexibilityThe flexibility of the coatingshall be evaluated by bending three 16 mm 58 in. thick panelscoated with a minimum of 0.3 mm 12 mils of coating over amandrel at 0 6 2C326 4 F. Tests shall be performed inaccordance wit
44、h 5.3.3.1 of API RP 5L7 with an acceptancecriterion of 1.5 total deflection at 0 6 2C326 40 F.Bends shall be visually inspected; any visible tears or cracks inthe coating at bends is cause for rejection, unless located with2.5 mm 0.1 in. of the edge of the strap. Unopened stretchmarks on the coating
45、 surface do not constitute coating failure.A1.3.4 Abrasion ResistanceThe abrasion resistance of thecoating shall be tested by a taber abraser (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
46、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 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
47、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 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
48、 in an elevatedcathodic disbondment test. Test Method G8 shall be followedA972/A972M 00 (2015)3except that flat plates coated with the proposed material shallbe used. The drilled coating defect shall be 3 mm 0.12 in. indiameter, the electrolyte solution shall be 3 % NaCl by massdissolved in distille
49、d 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 of threetest panels shall not exceed 6 mm 0.24 in. as measured fromthe edge of the intentional coating defect.ASTM 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 an
