ASTM C1745/C1745M-24
(Test Method)Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling Devices
Standard Test Method for Measurement of Hydraulic Characteristics of Hydrodynamic Stormwater Separators and Underground Settling Devices
SIGNIFICANCE AND USE
5.1 Each device has unique flow patterns and turbulence characteristics. In addition, each device exhibits a wide range of efficiencies as discharge, particle size, particle density, and flow viscosity (that is, water temperature) change. The testing procedure in Section 7 will help develop the parameters necessary to input into a function that describes the performance of a device under a wide range of application conditions. Specifically, this test standard produces a characteristic curve that describes the hydraulic head-discharge relationship in a hydrodynamic separator over a range of flow rates typical in system operation.
SCOPE
1.1 This test method concerns measurement of selected hydraulic characteristics of hydrodynamic separators and underground settling devices critical to their function as stormwater treatment devices.
1.2 Units tested shall be of a size commonly manufactured and available for purchase. In order to facilitate testing it is permissible to substitute alternate materials for the housing and structural components of the test units if operational components are at full size, with identical dimensions, configurations and materials specified for commercial use. Scale models are not permissible.
1.3 As each stormwater treatment device is unique in design, so are its hydraulic characteristics (flow versus head and loss coefficients). A sufficient number of accurately measured data points are needed to properly define the hydraulic characteristics of each test unit. Therefore, it is imperative that the unit setup and subsequent testing methodologies be well defined and executed to ensure accurate flow and elevation data.
1.4 The values stated in inch-pound units are to be regarded as standard, except for methods to establish and report sediment concentration and particle size. It is convention to exclusively describe sediment concentration in mg/L and particle size in mm or µm, both of which are SI units. The SI units given in parentheses are mathematical conversions, which are provided for information purposes only and are not considered standard. Reporting of test results in units other than inch-pound units shall not be regarded as non-conformance with this test method.
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
Relations
Buy Standard
Standards Content (Sample)
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: C1745/C1745M − 24
Standard Test Method for
Measurement of Hydraulic Characteristics of Hydrodynamic
1
Stormwater Separators and Underground Settling Devices
This standard is issued under the fixed designation C1745/C1745M; 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 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This test method concerns measurement of selected
ization established in the Decision on Principles for the
hydraulic characteristics of hydrodynamic separators and un-
Development of International Standards, Guides and Recom-
derground settling devices critical to their function as storm-
mendations issued by the World Trade Organization Technical
water treatment devices.
Barriers to Trade (TBT) Committee.
1.2 Units tested shall be of a size commonly manufactured
and available for purchase. In order to facilitate testing it is
2. Referenced Documents
permissible to substitute alternate materials for the housing and
2
2.1 ASTM Standards:
structural components of the test units if operational compo-
E3318 Terminology for Standards Relating to Stormwater
nents are at full size, with identical dimensions, configurations
Control Measures
and materials specified for commercial use. Scale models are
not permissible.
3. Terminology
1.3 As each stormwater treatment device is unique in
3.1 Definitions:
design, so are its hydraulic characteristics (flow versus head
3.1.1 For definitions of common technical terms used in this
and loss coefficients). A sufficient number of accurately mea-
standard, refer to Terminology E3318.
sured data points are needed to properly define the hydraulic
3.2 Definitions of Terms Specific to This Standard:
characteristics of each test unit. Therefore, it is imperative that
the unit setup and subsequent testing methodologies be well
NOTE 1—The terms and definitions related to this standard also relate to
defined and executed to ensure accurate flow and elevation
other standards currently being balloted. As such they are being balloted
data. separately in a single terminology document, Terminology E3318.
1.4 The values stated in inch-pound units are to be regarded
4. Summary of Test Method
as standard, except for methods to establish and report sedi-
4.1 This test method describes procedures and equipment
ment concentration and particle size. It is convention to
required to measure the hydraulic characteristics of hydrody-
exclusively describe sediment concentration in mg/L and
namic separators and underground settling devices used for
particle size in mm or μm, both of which are SI units. The SI
treating stormwater runoff.
units given in parentheses are mathematical conversions,
which are provided for information purposes only and are not
5. Significance and Use
considered standard. Reporting of test results in units other
than inch-pound units shall not be regarded as non-
5.1 Each device has unique flow patterns and turbulence
conformance with this test method.
characteristics. In addition, each device exhibits a wide range
of efficiencies as discharge, particle size, particle density, and
1.5 This standard does not purport to address all of the
flow viscosity (that is, water temperature) change. The testing
safety concerns, if any, associated with its use. It is the
procedure in Section 7 will help develop the parameters
responsibility of the user of this standard to establish appro-
necessary to input into a function that describes the perfor-
priate safety, health, and environmental practices and deter-
mance of a device under a wide range of application condi-
mine the applicability of regulatory limitations prior to use.
tions. Specifically, this test standard produces a characteristic
1
This test method is under the jurisdiction of ASTM Committee E64 on
Stormwater Control Measures and is the direct responsibility of Subcommittee
2
E64.01 on Lab Evaluation. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 1, 2024. Published February 2024. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2011. Last previous edition approved in 2018 as C1745/C1745M - 18. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C1745-24. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1745/C1745M − 18 C1745/C1745M − 24
Standard Test Method for
Measurement of Hydraulic Characteristics of Hydrodynamic
1
Stormwater Separators and Underground Settling Devices
This standard is issued under the fixed designation C1745/C1745M; 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
1.1 This test method concerns measurement of selected hydraulic characteristics of hydrodynamic separators and underground
settling devices critical to their function as stormwater treatment devices.
1.2 Units tested shall be of a size commonly manufactured, not a scale model.manufactured and available for purchase. In order
to facilitate testing it is permissible to substitute alternate materials for the housing and structural components of the test units if
operational components are at full size, with identical dimensions, configurations and materials specified for commercial use. Scale
models are not permissible.
1.3 As each stormwater treatment device is unique in design, so are its hydraulic characteristics (flow versus head and loss
coefficients). A sufficient number of accurately measured data points are needed to define properly define the hydraulic
characteristics of each test unit. Therefore, it is imperative that the unit setup and subsequent testing methodologies be well defined
and executed to ensure accurate flow and elevation data.
1.4 This test method addresses gravity flow operation only. It does not address performance of units operating under pressurized
conditions.
1.4 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.as standard, except for methods to establish and report sediment
concentration and particle size. It is convention to exclusively describe sediment concentration in mg/L and particle size in mm
or μm, both of which are SI units. The SI units given in parentheses are mathematical conversions, which are provided for
information purposes only and are not considered standard. Reporting of test results in units other than inch-pound units shall not
be regarded as non-conformance with this test method.
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.
1
This test method is under the jurisdiction of ASTM Committee E64 on Stormwater Control Measures and is the direct responsibility of Subcommittee E64.01 on Lab
Evaluation.
Current edition approved May 1, 2018Jan. 1, 2024. Published May 2018February 2024. Originally approved in 2011. Last previous edition approved in 20112018 as
C1745/C1745M - 11.C1745/C1745M - 18. DOI: 10.1520/C1745_C1745M-18.10.1520/C1745-24.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1745/C1745M − 24
2. Referenced Documents
2
2.1 ASTM Standards:
D3858E3318 Test Method for Open-Channel Flow Measurement of Water by Velocity-Area MethodTerminology for Standards
Relating to Stormwater Control Measures (Withdrawn 2023)
D4409 Test Method for Velocity Measurements of Water in Open Channels with Rotating Element Current Meters (Withdrawn
3
2023)
D5089 Test Method for Velocity Measurements of Water in Open Channels with Electromagnetic Current Meters (Withdrawn
3
2023)
D5242 Test Method for Open-Channel Flow Measurement of Water with Thin-Plate Weirs
D5389 Test Method for Open-Channel Flow Measurement by Acoustic Velocity Meter Systems
D5413 Test Methods for Measurement of Water Levels in Open-Water Bodies
3
D5640 Guide for Selection of
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.