1、 i Standard Practice Application of a Coating System to Interior Surfaces of New and Used Rail Tank Cars This NACE International standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. Its acceptance does not in any respect preclude any
2、one, whether he or she 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, by implication or othe
3、rwise, to manufacture, sell, or use in connection with any method, apparatus, or product covered by Letters Patent, or as indemnifying or protecting anyone against liability for infringement of Letters Patent. This standard represents minimum requirements and should in no way be interpreted as a res
4、triction on the use of better procedures or materials. Neither is this standard intended to apply in all cases relating to the subject. Unpredictable circumstances may negate the usefulness of this standard in specific instances. NACE International assumes no responsibility for the interpretation or
5、 use of this standard by other parties and accepts responsibility for only those official NACE International interpretations issued by NACE International in accordance with its governing procedures and policies which preclude the issuance of interpretations by individual volunteers. Users of this NA
6、CE International standard are responsible for reviewing appropriate health, safety, environmental, and regulatory documents and for determining their applicability in relation to this standard prior to its use. This NACE International standard may not necessarily address all potential health and saf
7、ety problems or environmental hazards associated with the use of materials, equipment, and/or operations detailed or referred to within this standard. Users of this NACE International standard are also responsible for establishing appropriate health, safety, and environmental protection practices, i
8、n consultation with appropriate regulatory authorities if necessary, to achieve compliance with any existing applicable regulatory requirements prior to the use of this standard. CAUTIONARY NOTICE: NACE International standards are subject to periodic review, and may be revised or withdrawn at any ti
9、me in accordance with NACE technical committee procedures. NACE International requires that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of initial publication. The user is cautioned to obtain the latest edition. Purchasers of NACE Internation
10、al standards may receive current information on all standards and other NACE International publications by contacting the NACE International FirstService Department, 1440 South Creek Drive, Houston, Texas 77084-4906 (telephone +1 281-228-6200). Revised 2008-06-20 Reaffirmed 2003-03-17 Approved April
11、 1995 NACE International 1440 South Creek Drive Houston, Texas 77084-4906 +1 281-228-6200 ISBN 1-57590-164-1 2008, NACE International NACE SP0295-2008 (formerly RP0295-2003) Item No. 21070 SP0295-2008 NACE International i _ Foreword This standard practice has been prepared for the rail car industry
12、to address the need for high-quality application of coatings to the interior surfaces of rail tank cars handling a variety of chemicals at various temperatures. Qualified inspection of the completed coating system and testing by the use of adequate, readily available instruments also are covered. Co
13、ating manufacturers, coating applicators, and those who have contracting authority for car internal coating installation should be able to use this standard to ascertain the facilities, equipment, and personnel needed to satisfy the requirements for coating systems for cars in chemical service. This
14、 standard emphasizes that corrosion and product contamination are major factors that must be considered in the design of tank cars transporting liquid commodities. In addition to adhering to the conditions set forth in this standard, these tank cars must comply with U.S. Department of Transportation
15、 (DOT)(1)Code of Federal Regulations (CFR) Title 49, Part 179,1Transport Canada (Transportation of Dangerous Goods TDG)(2)CAN/CGSB(3)43-147,2and Association of American Railroads (AAR)(4)Standard M1002.3This standard is not meant to provide a full treatise on corrosion of steel by chemicals, which i
16、s an extensive subject in its own right. Although most coatings are applied to prevent shipped product from being contaminated by a corroding tank car, DOT and AAR are attempting to resolve the issue of how much corrosion should be allowed in tank cars. One factor to consider when adding a corrosion
17、 allowance is the required life of the tank car. The extra wall thickness of a tank car that is expected to be in service for 40 to 50 years can add substantially to the tank cars weight and result in a severe reduction in carrying capacity. In cars handling corrosive liquids, adding a corrosion all
18、owance without any other form of corrosion protection is clearly not a practical solution for long-term operation. This standard was originally developed in 1995 by NACE International Task Group (TG) T-14C-6, a component of Unit Committee T-14CRail Equipment Corrosion. It was reaffirmed in 2003 by S
19、pecific Technology Group (STG) 43Land Transportation. It was revised in 2008 by Task Group 333Application of a Coating System to Interior Surfaces of New and Used Rail Tank Cars, and is issued by NACE under the auspices of STG 43. In NACE standards, the terms shall, must, should, and may are used in
20、 accordance with the definitions of these terms in the NACE Publications Style Manual. The terms shall and must are used to state a requirement, and are considered mandatory. The term should is used to state something good and is recommended, but is not considered mandatory. The term may is used to
21、state something considered optional. _ _ (1)U.S. Department of Transportation (DOT), 400 7th St. SW, Washington, DC 20590. (2)Transport Canada (TDG), 330 Sparks Street, Ottawa, ON K1A 0N5 Canada. (3)Canadian General Standards Board (CGSB), Ottawa, ON K1A 1G6 Canada. (4)Association of American Railro
22、ads (AAR), 50 F St. NW, Washington, DC 20001-1564. SP0295-2008 ii NACE International _ NACE International Standard Practice Application of a Coating System to Interior Surfaces of New and Used Rail Tank Cars Contents 1. General . 1 2. Definitions . 1 3. Areas of Responsibility . 2 4. Surface Prepara
23、tion for New Tank Cars. 3 5. Surface Preparation for Used Tank Cars 4 6. Coating System Materials . 4 7. Coating Application . 5 8. Completed Coating System 5 9. Inspection 6 10. Safety 6 References 7 Bibliography 7 Appendix A: Tank Car Coating System Inspection Report Form 8 Appendix B: Essential F
24、acilities and Equipment for Application of a Coating System to the Interior of Tank Cars . 10 _ SP0295-2008 NACE International 1 _ Section 1: General 1.1 This standard describes a procedure for the application of a coating system to the interior surfaces of new and used rail tank cars that transport
25、 various commodities. 1.2 The requirements for surface preparation, coatings, application, inspection, and quality tests for coating a tank car internally also are covered in this standard. 1.3. Liquid coatings discussed in this standard may be hazardous; therefore, basic safety precautions regardin
26、g the handling and application of these coating materials and solvents shall be used. NACE TPC 24contains more detailed information in its chapter on safety. The material safety data sheets (MSDSs) supplied by the coating manufacturer provide additional information relative to government regulations
27、. 1.4 Appendix A (nonmandatory) is an example of a suggested tank car coating system inspection report form. 1.5 Appendix B (nonmandatory) describes essential facilities and equipment for application of a coating system to the interior of tank cars. _ Section 2: Definitions Car Owner: The person or
28、firm that owns the tank car. (This person or firm may also be the contracting authority.) Coat: One layer of a coating applied to a surface in a single continuous application to form a uniform film when dry. Coating Applicator: The firm that is executing the specified work. Coating System: The compl
29、ete number and types of coats applied to a substrate in a predetermined order. (When used in a broader sense, surface preparation, pretreatments, dry film thickness, and manner of application are included.) Contracting Authority: The person or firm responsible for the approval and purchase of a comp
30、leted tank car coating system. Crater: A small, rounded depression in a coating generally resulting from foreign matter in or deposited on a wet coating film. Discontinuity: (1) An interruption in the normal physical structure or configuration of a coating such as cracks, laps, seams, inclusions, po
31、rosity, or holidays. A discontinuity may or may not affect the usefulness of the coating. (2) A condition in which the electrical path of a structure is interrupted by a device that acts as a dielectric or insulating fitting. Dry Film Thickness (DFT): The thickness of a dried film, coating, or membr
32、ane. DFT Measurement: An average of three DFT readings. DFT Reading: A single DFT gauge determination. Holiday: A discontinuity in a protective coating that exposes unprotected surface to the environment. Holiday Detector: An instrument that locates discontinuities in a coating film applied to a con
33、ductive surface. Inspection Agency: The party charged with the responsibility for inspection. Orange Peel: The dimpled appearance of a dried coating resembling the surface of an orange. Pinhole: A minute hole through a coat or coats that exposes an underlying coat or the substrate. Pit: A surface an
34、omaly. A cavity, usually round in shape, with depth equal to or greater than the diameter at the opening. Pot Life: The elapsed time within which a coating can be effectively applied after all components of the coating have been thoroughly mixed. Quality Assurance: All those planned and systematic a
35、ctions necessary to provide specified documentation and adequate confidence that the tank car coating system will perform satisfactorily in service. Quality Control: Those quality assurance actions related to the physical characteristics of the entire coating systems application as a means of provid
36、ing compliance with specified requirements. Shelf Life: The maximum length of time packaged materials (e.g., coating materials) can be stored at specified conditions and remain in usable condition. SP0295-2008 2 NACE International Surface Profile: The irregular peak and valley profile on the surface
37、 of bare metal that results from abrasive blast cleaning or power tool cleaning. _ Section 3: Areas of Responsibility 3.1 Contracting Authority 3.1.1 An inspection of the contractors facilities and equipment shall be conducted before the coating project is submitted for bids. 3.1.2 A prejob conferen
38、ce shall be held before the coating work is begun. The conference shall include representatives of the contracting authority, inspection agency, coating manufacturer, and coating applicator. The coating applicators representatives shall include the quality control supervisor and responsible shop per
39、sonnel directly involved in the coating application. 3.1.3 This standard shall be reviewed along with any other related standards and specifications at the prejob conference. Any points of misunderstanding regarding pertinent standards shall be resolved at the prejob conference. 3.1.4 Inspection for
40、ms shall be approved by the contracting authority. 3.1.5 Quality assurance shall be the responsibility of the contracting authority. 3.1.6 In order to safely and adequately prepare the surface for application of a coating system, the coating applicator shall be provided, in writing, all essential in
41、formation regarding products previously shipped in the tank car to be coated. 3.1.7 The contracting authority shall specify the surface preparation, type of coating, color, number of coats to be applied, and minimum and maximum allowable dry film thickness (DFT). 3.1.8 The contracting authority shal
42、l at a minimum retain inspection records for 10 years, or until the next coating system application to the vessel, or until ownership of the coating is relinquished, or as necessary to comply with regulations. 3.2 Coating Applicator 3.2.1 Quality control shall be the responsibility of the coating ap
43、plicator. 3.2.2 The quality control supervisor and responsible shop supervisory personnel directly involved in the surface preparation and coating application shall be present at the prejob conference scheduled by the contracting authority. 3.2.3 Authorized shop personnel and representatives of the
44、contracting authority shall have suitable access to all areas where work is in progress on subject tank cars. 3.2.4 Prior to initiation of metal repairs to the interior of the tank car, the contracting authority shall approve the repair procedures. 3.2.5 Assurance shall be given that the work is bei
45、ng performed in compliance with all applicable AAR and other applicable regulations. 3.2.6 Subject to all applicable regulations, the coating applicator is responsible for personnel safety in the handling, application, and disposal of the specified coatings. Current MSDSs for each component of a coa
46、ting system to be applied shall be made available to each person using the materials, and a copy shall be retained on file. 3.2.7 Current coating application instructions shall be available at the application site. 3.2.8 The coating applicator shall forward the completed inspection forms to the cont
47、racting authority and retain a copy on file for not less than five years, or the life of the warranty, whichever is longer, or as necessary to comply with regulations. 3.2.9 If the coating applicator is inexperienced or unfamiliar with the specified coating system, the coating applicator shall obtai
48、n technical assistance from the coating manufacturer. 3.2.10 The coating applicator shall inform both the contracting authority and the coating manufacturer when an application problem that may affect the quality of the finished coating system arises. 3.3 Coating Manufacturer 3.3.1 Technical assistance for application problems shall be provided when requested by
