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ASTM C1847-21

(Specification)

Standard Specification for Direct Buried Pre-Insulated and Jacketed Polyurethane Bonded Low Temperature Hot Water Piping Systems

Standard Specification for Direct Buried Pre-Insulated and Jacketed Polyurethane Bonded Low Temperature Hot Water Piping Systems

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1.1 This specification covers direct buried underground pre-insulated, hot water piping systems with an upper temperature limit of 250 °F (121 °C) used to convey pressurized fluids for district heating. In the pre-insulated pipe industry and in this standard, this temperature range is called “low temperature hot water”.  
1.2 This specification shall not be used for low-pressure steam systems, steam trap discharge or pressurized condensate systems, since there is a high risk of exceeding the upper temperature limits. Pumped condensate return lines that are vented to atmosphere are considered to be low temperature hot water and are acceptable for this application.  
1.3 This specification covers only piping systems insulated and jacketed with bonded polyurethane (PUR) rigid foam. A piping system consists of both straight sections of pre-insulated piping as well as pre-insulated fittings and field closures of the insulation system, and all materials required to ensure a water tight insulation system which will preclude water from entering the insulation from the surrounding soil. This specification does not encompass insulating or jacketing materials, or insulation methods, which do not produce factory, pre-fabricated, insulated and jacketed units for assembly at the field site.  
1.4 The insulated piping systems covered by this specification do not possess an air gap between the carrier pipe and the insulation nor between the insulation and jacket. For straight pipe sections of the piping systems covered by this specification, these three components are bonded together.  
1.5 The carrier piping that is part of the insulated piping system covered by this specification shall be designed, fabricated, and tested to the requirements of ANSI/ASME B31.1 (Power Piping).  
1.6 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered to be the standard.  
1.7 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.  
1.8 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
30-Apr-2021
ICS
23.040.07 - Pipeline and its parts for district heat
Technical Committee
C16 - Thermal Insulation
Drafting Committee
C16.40 - Insulation Systems
Current Stage
Ref Project

Relations

Refers
ASTM D1622-20 - Standard Test Method for Apparent Density of Rigid Cellular Plastics
Effective Date
15-Jul-2020

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ASTM C1847-21 - Standard Specification for Direct Buried Pre-Insulated and Jacketed Polyurethane Bonded Low Temperature Hot Water Piping SystemsASTM C1847-21 - Standard Specification for Direct Buried Pre-Insulated and Jacketed Polyurethane Bonded Low Temperature Hot Water Piping Systems
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ASTM C1847-21 - Standard Specification for Direct Buried Pre-Insulated and Jacketed Polyurethane Bonded Low Temperature Hot Water Piping Systems
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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:C1847 −21
Standard Specification for
Direct Buried Pre-Insulated and Jacketed Polyurethane
1
Bonded Low Temperature Hot Water Piping Systems
This standard is issued under the fixed designation C1847; 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 cal conversions to SI units that are provided for information
only and are not considered to be the standard.
1.1 This specification covers direct buried underground
1.7 This standard does not purport to address all of the
pre-insulated, hot water piping systems with an upper tempera-
safety concerns, if any, associated with its use. It is the
ture limit of 250 °F (121 °C) used to convey pressurized fluids
responsibility of the user of this standard to establish appro-
for district heating. In the pre-insulated pipe industry and in
priate safety, health, and environmental practices and deter-
thisstandard,thistemperaturerangeiscalled“lowtemperature
mine the applicability of regulatory limitations prior to use.
hot water”.
1.8 This international standard was developed in accor-
1.2 This specification shall not be used for low-pressure
dance with internationally recognized principles on standard-
steam systems, steam trap discharge or pressurized condensate
ization established in the Decision on Principles for the
systems, since there is a high risk of exceeding the upper
Development of International Standards, Guides and Recom-
temperature limits. Pumped condensate return lines that are
mendations issued by the World Trade Organization Technical
vented to atmosphere are considered to be low temperature hot
Barriers to Trade (TBT) Committee.
water and are acceptable for this application.
1.3 This specification covers only piping systems insulated
2. Referenced Documents
and jacketed with bonded polyurethane (PUR) rigid foam. A
2
2.1 ASTM Standards:
pipingsystemconsistsofbothstraightsectionsofpre-insulated
A53/A53M Specification for Pipe, Steel, Black and Hot-
piping as well as pre-insulated fittings and field closures of the
Dipped, Zinc-Coated, Welded and Seamless
insulation system, and all materials required to ensure a water
A105/A105M Specification for Carbon Steel Forgings for
tightinsulationsystemwhichwillprecludewaterfromentering
Piping Applications
the insulation from the surrounding soil. This specification
A106/A106M Specification for Seamless Carbon Steel Pipe
does not encompass insulating or jacketing materials, or
for High-Temperature Service
insulation methods, which do not produce factory, pre-
A234/A234M Specification for Piping Fittings of Wrought
fabricated,insulatedandjacketedunitsforassemblyatthefield
Carbon Steel and Alloy Steel for Moderate and High
site.
Temperature Service
1.4 The insulated piping systems covered by this specifica-
A312/A312M Specification for Seamless, Welded, and
tion do not possess an air gap between the carrier pipe and the
Heavily Cold Worked Austenitic Stainless Steel Pipes
insulation nor between the insulation and jacket. For straight
A403/A403M SpecificationforWroughtAusteniticStainless
pipe sections of the piping systems covered by this
Steel Piping Fittings
specification, these three components are bonded together.
B88 Specification for Seamless Copper Water Tube
C168 Terminology Relating to Thermal Insulation
1.5 The carrier piping that is part of the insulated piping
C335 Test Method for Steady-State Heat Transfer Properties
system covered by this specification shall be designed,
of Pipe Insulation
fabricated, and tested to the requirements of ANSI/ASME
C518 Test Method for Steady-State Thermal Transmission
B31.1 (Power Piping).
Properties by Means of the Heat Flow Meter Apparatus
1.6 The values stated in inch-pound units are to be regarded
C1409 Guide for Measuring and Estimating Quantities of
asthestandard.Thevaluesgiveninparenthesesaremathemati-
Insulated Piping and Components
1
This specification is under the jurisdiction of ASTM Committee C16 on
2
Thermal Insulation and is the direct responsibility of Subcommittee C16.40 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Insulation Systems. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2021. Published June 2021. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
C1847-21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohoc
...

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SIGNIFICANCE AND USE
4.1 Regulatory Requirements—The USA Code of Federal Regulations (10CFR Part 50, Appendix H) requires the implementation of a reactor vessel materials surveillance program for all operating LWRs. Other countries have similar regulations. The purpose of the program is to (1) monitor changes in the fracture toughness properties of ferritic materials in the reactor vessel beltline6 resulting from exposure to neutron irradiation and the thermal environment, and (2) make use of the data obtained from surveillance programs to determine the conditions under which the vessel can be operated with adequate margins of safety throughout its service life. Practice E185, derived mechanical property data, and (r, θ, z) physics-dosimetry data (derived from the calculations and reactor cavity and surveillance capsule measurements (1) using physics-dosimetry standards) can be used together with information in Guide E900 and Refs. 4, 11-18 to provide a relation between property degradation and neutron exposure, commonly called a “trend curve.” To obtain this trend curve at all points in the pressure vessel wall requires that the selected trend curve be used together with the appropriate (r, θ, z) neutron field information derived by use of this guide to accomplish the necessary interpolations and extrapolations in space and time.  
4.2 Neutron Field Characterization—The tasks required to satisfy the second part of the objective of 4.1 are complex and are summarized in Practice E853. In doing this, it is necessary to describe the neutron field at selected (r, θ, z) points within the pressure vessel wall. The description can be either time dependent or time averaged over the reactor service period of interest. This description can best be obtained by combining neutron transport calculations with plant measurements such as reactor cavity (ex-vessel) and surveillance capsule or RPV cladding (in-vessel) measurements, benchmark irradiations of dosimeter sensor materials, and knowledge of th...
SCOPE
1.1 This guide establishes the means and frequency of monitoring the neutron exposure of the LWR reactor pressure vessel throughout its operating life.  
1.2 The physics-dosimetry relationships determined from this guide may be used to estimate reactor pressure vessel damage through the application of Practice E693 and Guide E900, using fast neutron fluence (E > 1.0 MeV and E > 0.1 MeV), displacements per atom (dpa), or damage-function-correlated exposure parameters as independent exposure variables. Supporting the application of these standards are the E853, E944, E1005, and E1018 standards, identified in 2.1.  
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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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.

  • Guide
    12 pages
    English language
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  • Guide
    12 pages
    English language
    sale 15% off