API RP 652-2020 pdf download

API RP 652-2020 pdf download

API RP 652-2020 pdf download.Linings of Aboveground Petroleum Storage Tank Bottoms .
2 Normative References The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any addenda) applies. API Bulletin 939-E, Identifcation, Repair, and Mitigation of Cracking of Steel Equipment in Petroleum Refneries and Petrochemical Plants API Recommended Practice 651, Cathodic Protection of Aboveground Petroleum Storage Tanks API Standard 653, Tank Inspection, Repair, Alteration, and Reconstruction API Standard 2015, Requirements for Safe Entry and Cleaning of Petroleum Storage Tanks ASTM D4285, 1 Standard Test Method for Indicating Oil or Water in Compressed Air ASTM D4414, Standard Practice for Measurement of Wet Film Thickness by Notch Gages ASTM D4940, Standard Test Method for Conductimetric Analysis of Water Soluble Ionic Contamination of Blasting Abrasives ASTM E96, Standard Test Methods for Water Vapor Transmission of Materials ASTM G9, Standard Test Method for Water Penetration into Pipeline Coatings NACE 37519, 2 Corrosion Data Survey—Metals Section
3.3 anode The electrode of an electrolytic cell in which oxidation is the principal reaction. NOTE Electrons fow away from the anode toward the cathode in the external circuit. It is usually the electrode where corrosion occurs, and metal ions enter solution. 3.4 cathode The electrode of an electrolytic cell at which reduction is the principal reaction. Electrons fow toward the cathode in the external circuit. 3.5 cathodic protection A corrosion control system in which the metal to be protected is made to serve as a cathode, either by the deliberate establishment of a galvanic cell or by impressed current. (See anode and cathode.) 3.6 caulk Products used in order to fair or smooth surfaces, as well as seal seams and rivets in lining applications. 3.7 coating A paint or other fnish used to create a protective or decorative layer. 3.8 concentration cell An electrochemical cell, the electromotive force (EMF) of which is caused by a diference in concentration of some component in the electrolyte, or electrolytes containing diferent substances. NOTE This diference leads to the formation of discrete cathode and anode regions. 3.9 corrosion The chemical or electrochemical reaction between a material, usually a metal, and its environment that produces a deterioration of the material and its properties. 3.10 corrosion protection The minimization of corrosion using linings for exposed steel surfaces and cathodic protection or vapor corrosion inhibitors for concealed tank bottom steel plate surfaces. 3.11 cure, curing The process whereby a liquid coating becomes a hard flm. Curing is complete when the lining is ready to accept immersion in the designated service. NOTE Methods of testing cure include solvent rub and hardness testing. 3.12 dew point Temperature at which moisture will condense from vapors into a liquid state. 3.13 diferential? aeration? cell A concentration cell caused by diferences in oxygen concentration along the surface of a metal in an electrolyte. 3.14 electrochemical cell An electrochemical system consisting of an anode and a cathode in metallic contact and immersed in an electrolyte. NOTE The anode and cathode may be diferent metals or dissimilar areas on the same metal surface. 3.15 electrolyte A nonmetallic substance that carries an electric current or a substance which when dissolved in another medium, such as water, separates into ions which can carry an electric current. 3.16 epoxy Extremely tough and durable synthetic coating resins that are highly resistant to chemicals, abrasion, moisture, and in some cases, alcohols. 3.17 fberglass-reinforced? plastic FRP Resin linings, usually polyester, vinyl ester, or epoxy into which layers of fberglass are incorporated to optimize the lining’s structural capability and performance. See NACE No. 10/SSPC-PA 6. 3.18 forced curing Acceleration of curing by increasing the temperature above ambient, accompanied by forced air circulation. 3.19 fretting corrosion Deterioration at the interface between contacting surfaces as the result of corrosion and movement between the two surfaces. 3.20 holiday A discontinuity in a protective coating that exposes unprotected surface to the environment. Also refers to application defects whereby small areas are left uncoated. 3.21 lining A liquid paint applied to the interior surfaces of a vessel that develops strong adhesion to the substrate and is designed for immersion service or vapor-space service for a specifed stored product.

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