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ASTM D4618-92(1996)

(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

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 metalic linings.
1.3 This specification represents the minimum requirements for lining work. In cases where the manufacturer's instructions and recommendations differ from this specification, these differences must be resolved before fabrication is started.  
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.5 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
09-Dec-1996
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

Relations

Replaced By
ASTM D4618-92(2003) - Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining Application
Effective Date
10-Jan-2003

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ASTM D4618-92(1996) - Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining ApplicationASTM D4618-92(1996) - Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining Application
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ASTM D4618-92(1996) - Standard Specification for Design and Fabrication of Flue Gas Desulfurization System Components for Protective Lining Application
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4618 – 92 (Reapproved 1996)
Standard Specification for
Design and Fabrication of Flue Gas Desulfurization System
Components for Protective Lining Application
This standard is issued under the fixed designation D 4618; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope and shall be minimized.
2.1.5 Special consideration shall be given to all conditions
1.1 This specification covers the design and fabrication of
of potentially excessive strain such as unsupported bottom
metal components for Flue Gas Desulfurization (FGD) equip-
areas, oil-canning, out of roundness, sidewall-to-bottom joints,
ment, including absorbers, tanks, chimney liners, ductwork and
etc.
associated equipment that are to be lined for corrosion or
2.1.5.1 Where a component is on a concrete foundation,
abrasion resistance, or both.
grouting shall be done if necessary to correct unsupported
1.2 Limitations
bottom areas.
1.2.1 This specification is intended only to define the design
2.1.5.2 Sand fill shall not be used for bottom support unless
considerations for successful application and performance of
provisions are made to ensure that the sand cannot be lost due
protective linings for FGD system components.
to erosion.
1.2.2 It does not cover structural performance of FGD
2.2 Accessibility:
components.
2.2.1 All interior surfaces of the components shall be
1.2.3 It does not cover use of metallic linings.
designed to be readily accessible for welding, grinding, surface
1.3 This specification represents the minimum requirements
preparation, and lining application.
for lining work. In cases where the manufacturer’s instructions
2.2.2 The minimum manway size for a working entrance
and recommendations differ from this specification, these
during lining application shall be 36 in. (900 mm) in diameter
differences must be resolved before fabrication is started.
or 24 in. (600 mm) width by 36 in. (900 mm) height.
1.4 The values stated in inch-pound units are to be regarded
2.2.2.1 Closed components shall have a minimum of two
as the standard. The values given in parentheses are for
manways, one near the top and one near the bottom, preferably
information only.
located 180° apart to facilitate adequate ventilation for work-
1.5 This standard does not purport to address all of the
ers.
safety concerns, if any, associated with its use. It is the
2.2.2.2 Additional or larger openings may be required to
responsibility of the user of this standard to establish appro-
facilitate ventilation and material handling. The lining material
priate safety and health practices and determine the applica-
applicator should be consulted for specific requirements.
bility of regulatory limitations prior to use.
2.3 Shell Penetrations:
2. Design/Engineering Requirements
2.3.1 Openings such as, inlets, manholes, and outlet nozzles
shall be flush with the interior wall.
2.1 Rigidity:
2.3.1.1 Inlet nozzles may extend into vessels if incoming
2.1.1 The components shall be designed so that the interior
fluids will be detrimental to lining materials.
metal surfaces are sufficiently rigid for the intended lining
2.3.2 Any exterior or interior connection shall be flanged in
materials. Manufacturer’s recommendations for maximum
order to facilitate lining.
strains or deflection limits for the lining material shall be
2.3.3 The maximum length of flanged nozzles, 4 in. (100
followed.
mm) and greater in diameter, shall not exceed the dimensions
2.1.2 The weight of the lining system shall be considered in
in Table 1.
the structural design of the component.
2.3.3.1 Only 4 in. (100 mm) diameter and larger nozzles
2.1.3 The design shall consider the effects of pressure, wind,
shall be used for maximum reliability of the lining system.
seismic and other design loads.
2.3.3.2 As an alternative to lined nozzles, compatible pre-
2.1.4 Vibration may cause flexing or high surface strains on
fabricated, reinforced plastic, ceramic or alloy metal inserts
the lining. This is of particular concern to rigid lining materials
(sleeves) may be used if they offer superior corrosion and
abrasion protection. Lining shall overlap onto prefabricated
This specification is under the jurisdiction of ASTM Committee D33 on
liners.
Protective Coating and Lining Work for Power Generation Facilities and is the direct
responsibility of Subcommittee D33.09 on Protective Linings for FGD Systems. 2.3.3.3 If an insert is used as an alternate, the lining shall
Current edition approved Aug. 15, 1992. Published October 1992. Originally
overlap unto the insert or some other means of ensuring an
published as D 4618 – 87. Last previous edition D 4618 – 87.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 4618
TABLE 1 Maximum Length of Nozzles
Maximum Nozzle Length—
Nominal Nozzle Size,
Shell to Face of Flange,
in. (mm)
in. (mm)
4 (100) 8 (200)
6 (150) 12 (300)
8–24 (200–600) 16 (400)
26–36 (600–900) 24 (600)
Over 36 (900) any length
adequate seal should be provided.
2.3.4 Lining thickness may dictate changes in nozzle di-
mensions to achieve design flow rates.
2.4 Appurtenances Inside Components:
2.4.1 The requirements in Sections 2 and 3 apply to any
appurtenances that are being lined and installed inside a lined
component, such as agitators, anti-swirl baffles, gaging de-
vices, internal piping, ladders, and support brackets.
2.4.2 If appurtenances inside the component cannot be
lined, they shall be made of corrosion-resistant materials. If
alloys are used, the lining shall carry over the welded area onto
the alloy a minimum of 3 in. (76 mm). Some linings may
require special designs to protect the edge of the lining. If
bolted connections are used, dielectric insulation shall be
provided.
2.4.3 Heating elements shall be attached with a minimum
clearance of 6 in. (150 mm) from the surface of the lined
component. Greater clearance may be required to protect the
lining from excessive temperature conditions depending on the
temperature of the element.
2.4.4 Special precautions shall be taken in lined components
where severe abrasion/impingement damage may occur. Pre-
cautionary design measures, such as wear plates, brick liners or
FIG. 1 Weld Fabrication for Lining Application
added coating thickness, shall be considered when necessary.
2.5 Structural Reinforcement Members and Supports:
2.5.1 Structural reinforcement members (stiffeners) should 3.1.2 The degree of
...

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SCOPE
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Standard Specification for Coated Glass Mat Water-Resistant Gypsum Backing Panel

ABSTRACT
This specification covers coated glass mat water-resistant gypsum backing panel designed for use on ceilings and walls in bath and shower areas as a base for the application of ceramic or plastic tile. Coated glass mat water-resistant gypsum backing panel shall consist of a noncombustible water-resistant gypsum core, surfaced with glass mat, partially or completely embedded in the core, and with a water-resistant coating on one surface. The specimens shall be tested for flexural strength, humidified deflection, core hardness, end hardness, edge hardness, nail pull resistance, water resistance, and surface water absorption. Coated glass mat water-resistant gypsum backing panel shall have surfaces true and free of imperfections that render the panel unfit for its designed use.
SCOPE
1.1 This specification covers coated glass mat water-resistant gypsum backing panel designed for use on ceilings and walls in bath and shower areas as a base for the application of ceramic or plastic tile.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets.  
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.4 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.

  • Technical specification
    3 pages
    English language
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  • Technical specification
    3 pages
    English language
    sale 15% off