ASTM A862-98(R2020) pdf free download

ASTM A862-98(R2020) pdf free download.Standard Practice for Application of Asphalt Coatings to Corrugated Steel Sewer and Drainage Pipe
1. Scope
1.1 This practice covers the post coating of corrugated steel pipe and corrugated structural steel plate with asphalt materi- als. This practice is intended for shop-applied coating only. 1.2 The values stated in either inch-pound units or SI units shall be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, use each system independently ofthe other, without combining values in any way. The SI units are shown in brackets in the text for clarity, but they are the applicable values when the application is to be performed using SI units. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Classification
4.1 This practice covers three separate and distinct classifi- cations of coatings. The general conditions under which these coatings are used are described in Specification A849. 4.1.1 Classification A, Asphalt Coated —A uniform coating is applied to the interior and exterior of the product. 4.1.2 Asphalt Coated with Paved Invert : 4.1.2.1 Classification B1, Asphalt, HalfCoated with Paved Invert—Auniform coating is applied to the interior and exterior of the pipe covering at least 50 % of the circumference on the lower portion of the pipe as installed, and then a paving is applied on the lower portion of the interior of the pipe as installed (the invert) to provide a smooth flow line. 4.1.2.2 Classification B2, Asphalt, Fully Coated with Paved Invert—Auniform coating is applied to the interior and exterior of the pipe, and then a paving is applied on the lower portion of the interior of the pipe as installed (the invert) to provide a smooth flow line. 4.1.3 Classification C, Asphalt Coated and Lined—A uni- form coating is applied to the interior and exterior of the pipe, and then a lining is applied to fill the corrugations on the full interior of the pipe to provide a smooth interior. N OTE 1—This coating is sometimes referred to as any of the following: asphalt coated and lined, asphalt coated and fully paved, asphalt coated and 100 % paved, or asphalt coated smooth flow. The term “bituminous” is sometimes used instead of asphalt.
7. Procedure
7.1 Coating Application—Apply the asphalt coating by inserting the product into the bath twice; the first application results in a thin coating to achieve very good adherence, and the second achieves the coating thickness required by Specifi- cation A849. 7.1.1 Steel surfaces shall be free of dirt, grease, dust, and moisture before placement in the asphalt bath. The product shall be prepared immediately prior to the coating operation. 7.1.2 Rotate large structures in the tank to ensure that all surfaces are coated. 7.1.3 The product must remain in the tank until it achieves a minimum temperature of 375 °F [190 °C]. The specific time requirements will depend on factors unique to each operation and the product being coated. The time to reach the required temperature is dependent on the initial temperature of the product, the steel thickness, the size of the product, and the volume of the tank.