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ASTM D4618-92(2017)

(Specification)

Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining Application

Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining Application

ABSTRACT
This specification covers the design and fabrication of metal components for flue gas desulfurization equipment, including absorber, tanks, chimney liners, ductwork, and associated equipment intended for use in protective lining applications, that are to be lined for corrosion or abrasion resistance, or both. It does not however cover the structural performance of the components and the use of metallic linings. Each of the components shall be designed in such a way that it conforms to the engineering requirements for rigidity wherein the effects of pressure, wind, seismic, and other design loads shall be considered; accessability to welding, grinding, surface preparation, and lining application; shell penetrations; appurtenances inside components such as agitators, anti-swirl baffles, gaging devices, internal piping, ladders, and support brackets; and structural reinforcement members and supports. All internal welds shall be continuous without imperfections and the degree of weld preparation prior to lining shall depend on the type of lining to be applied. Riveted joints and internal bolted joints shall not be used while lap bolted joints shall be avoided whenever possible. Intermittent or spot welding shall not be permitted as well.
SCOPE
1.1 This specification covers the design and fabrication of metal components for flue gas desulfurization (FGD) equipment, including absorbers, tanks, chimney liners, ductwork and associated equipment that are to be lined for corrosion or abrasion resistance, or both.  
1.2 Limitations:  
1.2.1 This specification is intended only to define the design considerations for successful application and performance of protective linings for FGD system components.  
1.2.2 It does not cover structural performance of FGD components.  
1.2.3 It does not cover use of metallic linings.  
1.3 This specification represents the minimum requirements for lining work. In cases in which the manufacturer's instructions and recommendations differ from this specification, these differences shall be resolved before fabrication is started.  
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.5 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 appropriate safety, health and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Aug-2017
ICS
13.040.40 - Stationary source emissions
27.100 - Power stations in general
Technical Committee
D33 - Protective Coating and Lining Work for Power Generation Facilities
Drafting Committee
D33.09 - Protective Lining for Air Quality Control Systems
Current Stage
Ref Project

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ASTM D4618-92(2017) - Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining ApplicationASTM D4618-92(2017) - Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining Application
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ASTM D4618-92(2017) - Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining Application
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D4618 −92 (Reapproved 2017)
Standard Specification for
Design and Fabrication of Flue Gas Desulfurization System
1
Components for Protective Lining Application
This standard is issued under the fixed designation D4618; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of 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. Scope 2. Design/Engineering Requirements
2.1 Rigidity:
1.1 This specification covers the design and fabrication of
metal components for flue gas desulfurization (FGD) 2.1.1 The components shall be designed so that the interior
equipment, including absorbers, tanks, chimney liners, duct- metal surfaces are sufficiently rigid for the intended lining
work and associated equipment that are to be lined for materials. Manufacturer’s recommendations for maximum
corrosion or abrasion resistance, or both. strains or deflection limits for the lining material shall be
followed.
1.2 Limitations:
2.1.2 The weight of the lining system shall be considered in
1.2.1 This specification is intended only to define the design
the structural design of the component.
considerations for successful application and performance of
2.1.3 Thedesignshallconsidertheeffectsofpressure,wind,
protective linings for FGD system components.
seismic and other design loads.
1.2.2 It does not cover structural performance of FGD
2.1.4 Vibration may cause flexing or high surface strains on
components.
the lining.This is of particular concern to rigid lining materials
1.2.3 It does not cover use of metallic linings.
and shall be minimized.
2.1.5 Special consideration shall be given to all conditions
1.3 This specification represents the minimum requirements
of potentially excessive strain such as unsupported bottom
for lining work. In cases in which the manufacturer’s instruc-
areas, oil-canning, out of roundness, sidewall-to-bottom joints,
tions and recommendations differ from this specification, these
and so forth.
differences shall be resolved before fabrication is started.
2.1.5.1 Where a component is on a concrete foundation,
1.4 The values stated in inch-pound units are to be regarded
grouting shall be done if necessary to correct unsupported
as standard. The values given in parentheses are mathematical
bottom areas.
conversions to SI units that are provided for information only
2.1.5.2 Sand fill shall not be used for bottom support unless
and are not considered standard.
provisions are made to ensure that the sand cannot be lost as a
1.5 This standard does not purport to address all of the
result of erosion.
safety concerns, if any, associated with its use. It is the
2.2 Accessibility:
responsibility of the user of this standard to establish appro-
2.2.1 All interior surfaces of the components shall be
priate safety, health and environmental practices and deter-
designed to be readily accessible for welding, grinding, surface
mine the applicability of regulatory limitations prior to use.
preparation, and lining application.
1.6 This international standard was developed in accor-
2.2.2 The minimum manway size for a working entrance
dance with internationally recognized principles on standard-
during lining application shall be 36 in. (900 mm) in diameter
ization established in the Decision on Principles for the
or 24 in. (600 mm) width by 36 in. (900 mm) height.
Development of International Standards, Guides and Recom-
2.2.2.1 Closed components shall have a minimum of two
mendations issued by the World Trade Organization Technical
manways, one near the top and one near the bottom, preferably
Barriers to Trade (TBT) Committee.
located 180° apart to facilitate adequate ventilation for work-
ers.
2.2.2.2 Additional or larger openings may be required to
1
This specification is under the jurisdiction of ASTM Committee D33 on
facilitate ventilation and material handling. The lining material
ProtectiveCoatingandLiningWorkforPowerGenerationFacilitiesandisthedirect
applicator should be consulted for specific requirements.
responsibility of Subcommittee D33.09 on Protective Lining forAir Quality Control
Systems.
2.3 Shell Penetrations:
Current edition approved Sept. 1, 2017. Published September 2017. Originally
ɛ
2.3.1 Openings such as, inlets, manholes, and outlet nozzles
approved in 1987. Last previous edition approved in 2010 as D4618 – 92 (2010) .
DOI: 10.1520/D4618-92R17. shall be flush with the interior wall.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United State
...

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5.1 This test method is applicable to the measurement of airborne asbestos in a wide range of ambient air situations and for detailed evaluation of any atmosphere for asbestos structures. Most fibers in ambient atmospheres are not asbestos, and therefore, there is a requirement for fibers to be identified. Most of the airborne asbestos fibers in ambient atmospheres have diameters below the resolution limit of the light microscope. This test method is based on transmission electron microscopy, which has adequate resolution to allow detection of small thin fibers and is currently the only technique capable of unequivocal identification of the majority of individual fibers of asbestos. Asbestos is often found, not as single fibers, but as very complex, aggregated structures, which may or may not also be aggregated with other particles. The fibers found suspended in an ambient atmosphere can often be identified unequivocally if sufficient measurement effort is expended. However, if each fiber were to be identified in this way, the analysis would become prohibitively expensive. Because of instrumental deficiencies or because of the nature of the particulate matter, some fibers cannot be positively identified as asbestos even though the measurements all indicate that they could be asbestos. Therefore, subjective factors contribute to this measurement, and consequently, a very precise definition of the procedure for identification and enumeration of asbestos fibers is required. The method defined in this test method is designed to provide a description of the nature, numerical concentration, and sizes of asbestos-containing particles found in an air sample. The test method is necessarily complex because the structures observed are frequently very complex. The method of data recording specified in the test method is designed to allow reevaluation of the structure-counting data as new applications for measurements are developed. All of the feasible specimen preparation techn...
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1.1 This test method2 is an analytical procedure using transmission electron microscopy (TEM) for the determination of the concentration of asbestos structures in ambient atmospheres and includes measurement of the dimension of structures and of the asbestos fibers found in the structures from which aspect ratios are calculated.  
1.1.1 This test method allows determination of the type(s) of asbestos fibers present.  
1.1.2 This test method cannot always discriminate between individual fibers of the asbestos and non-asbestos analogues of the same amphibole mineral.  
1.2 This test method is suitable for determination of asbestos in both ambient (outdoor) and building atmospheres.  
1.2.1 This test method is defined for polycarbonate capillary-pore filters or cellulose ester (either mixed esters of cellulose or cellulose nitrate) filters through which a known volume of air has been drawn and for blank filters.  
1.3 The upper range of concentrations that can be determined by this test method is 7000 s/mm2. The air concentration represented by this value is a function of the volume of air sampled.  
1.3.1 There is no lower limit to the dimensions of asbestos fibers that can be detected. In practice, microscopists vary in their ability to detect very small asbestos fibers. Therefore, a minimum length of 0.5 μm has been defined as the shortest fiber to be incorporated in the reported results.  
1.4 The direct analytical method cannot be used if the general particulate matter loading of the sample collection filter as analyzed exceeds approximately 10 % coverage of the collection filter by particulate matter.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 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 appropri...

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  • Standard
    33 pages
    English language
    sale 15% off