API RP 583-2021 pdf free download
API RP 583-2021 pdf free download.Corrosion Under Insulation and Fireproofing.
3 3.1 API R ECOMMENDED P RACTICE 583 Terms, Definitions, Acronyms, and Abbreviations Terms and Definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 ablative coating A coating that is designed to dissipate heat by oxidative erosion of a heat protection layer (i.e. charring) while protecting the underlying metal substrate. 3.1.2 aerogel A homogeneous, low-density solid-state material derived from a gel, in which the liquid component of the gel has been replaced with a gas. The resulting material has a porous structure with an average pore the mean free path of air molecules at standard atmospheric pressure and temperature. 3.1.3 americium 241 Nuclear isotope that emits fast, high-energy neutron radiation; used to detect slow, thermal neutrons generated by collision with hydrogen atoms. 3.1.4 amphoteric Capable of reacting chemically either as an acid or as a base. 3.1.5 calcium silicate Insulation that is composed principally of hydrous calcium silicate and usually contains reinforcing fibers. 3.1.6 cellular glass Insulation that is composed of glass processed to form a rigid foam having a predominately closed-cell structure. 3.1.7 cementitious coating A coating that contains Portland cement as one of its components and is held onto the applied substrate by a binder; also defined as “binders, aggregates and fibers mixed with water” in API 221 8. 3.1.8 chlorosulfonated polyethelene CSPE A polymer used for nonmetallic weather jacketing. 3.1.9 cladding See “jacketing.” 3.1.10 cobalt 60 Nuclear isotope that emits gamma radiation with far greater penetrating power than iridium 1 92; used to expose radiographic film, computed radiography (CR) plates, linear diode array (LDA) and digital detector array (DDA) detectors.
3.1.11 cold piping Piping systems normally operating below the dew point. 3.1.12 comparator block A steel object such as a steel ball or block used to calculate the geometric unsharpness factor for distortion on a radiograph of a wall pipe. The geometric unsharpness factor is then used to calculate the true thickness of the pipe wall. 3.1.13 composite wrap A wrapping system composed of multiple nonmetallic fiber/polymer layers to repair corroded piping. 3.1.14 corrosion under fireproofing CUF Corrosion of piping, pressure vessels, and structural components resulting from water trapped under fireproofing. 3.1.15 corrosion under insulation CUI External corrosion of materials of construction piping, pressure vessels, and structural components resulting from water trapped under insulation; ECSCC of austenitic and duplex stainless steel under insulation is also classified as CUI damage. 3.1.16 dead-leg Section of piping or a piping system where there is no significant flow; examples include: blanked branches, lines with normally closed block valves, lines that have one end blanked, pressurized dummy support legs, stagnant control valve bypass piping, spare pump piping, level bridles, relief valve inlet and outlet header piping, pump trim bypass lines, high point vents, sample points, drains, bleeders, and instrument connections. 3.1.17 deluge system Defined in NFPA 1 5, an installation equipped with multiple open nozzles connected to a water supply by means of a deluge valve, which allows water to flow from all nozzles simultaneously. This is similar to a water spray system, but does not use directional water spray nozzles to achieve a specific water discharge and distribution. In the refining industry, the term “deluge system” is generally a system without nozzles in which all the water is applied from an open pipe. API 251 0 and API 251 0A describe such a system at the top of a vessel that allows water to run down the sides in a thin film
