ASTM C12-13a

Standard Practice for Installing Vitrified Clay Pipe Lines

ABSTRACT
This practice covers the proper methods of installing vitified clay pipe lines in order to fully utilize the structural properties of such pipe. The external loads on installed vitrified clay pipe are of two general types: (I) dead loads and (2) live loads. For pipes installed in trenches at a given depth, the dead load increases as the trench width, measured at the top of the pipe, increases. Live loads that act at the ground surface are partially transmitted to the pipe. Live loads may be produced by wheel loading, construction equipment or by compactive effort. Classes of bedding and encasements for pipe in trenches are defined as Class D wherein the pipe shall be placed on a firm and unyielding trench bottom with bell holes provided, Class C wherein the pipe shall be bedded in clean coarse-grained gravels and sands, Class B wherein the pipe shall be bedded in suitable material and Class A. Trenches shall be excavated to a width that will provide adequate working space, but not more than the maximum design width. Trench walls shall not be undercut. Bell holes shall be excavated to prevent point loading of the bells or couplings of laid pipe, and to establish full-length support of the pipe barrel. Final backfill need not be compacted to develop field supporting strength of the pipe. Final backfill may require compaction to prevent settlement of the ground surface.
SCOPE
1.1 This practice covers the proper methods of installing vitrified clay pipe lines in order to fully utilize the structural properties of such pipe.  
1.2 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.  
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Nov-2013
• ICS: 23.040.01 - Pipeline components and pipelines in general
• Technical Committee: C04 - Vitrified Clay Pipe
• Drafting Committee: C04.20 - Methods of Test and Specifications

Relations

• Replaces: ASTM C12-13 - Standard Practice for Installing Vitrified Clay Pipe Lines
• Effective Date: 01-Dec-2013
• Replaced By: ASTM C12-14 - Standard Practice for Installing Vitrified Clay Pipe Lines
• Effective Date: 01-Sep-2014
• Referred By: ASTM C1091-03a(2022) - Standard Test Method for Hydrostatic Infiltration Testing of Vitrified Clay Pipe Lines
• Effective Date: 01-Dec-2013
• Referred By: ASTM C425-22 - Standard Specification for Compression Joints for Vitrified Clay Pipe and Fittings
• Effective Date: 01-Dec-2013
• Referred By: ASTM C301-18(2022) - Standard Test Methods for Vitrified Clay Pipe
• Effective Date: 01-Dec-2013
• Referred By: ASTM C828-23 - Standard Test Method for Low-Pressure Air Test of Vitrified Clay Pipe Lines
• Effective Date: 01-Dec-2013

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C12 −13a
StandardPractice for
1
Installing Vitrified Clay Pipe Lines
ThisstandardisissuedunderthefixeddesignationC12;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D2487Practice for Classification of Soils for Engineering
Purposes (Unified Soil Classification System)
1.1 This practice covers the proper methods of installing
D5821Test Method for Determining the Percentage of
vitrified clay pipe lines in order to fully utilize the structural
Fractured Particles in Coarse Aggregate
properties of such pipe.
D6103Test Method for Flow Consistency of Controlled
3
1.2 Thevaluesstatedininch-poundunitsaretoberegarded
Low Strength Material (CLSM) (Withdrawn 2013)
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
3. Terminology
and are not considered standard.
3.1 General—Terminology C896 can be used for clarifica-
1.3 This standard does not purport to address all of the
tion of terminology in this specification.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
DESIGN CONSIDERATIONS
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Supporting Strength
2. Referenced Documents 4.1 The field supporting strength of vitrified clay pipe is
2
materially affected by the methods of installation. The field
2.1 ASTM Standards:
supporting strength of a pipe is defined as its capacity to
C301Test Methods for Vitrified Clay Pipe
support dead and live loads under actual field conditions. It is
C403/C403MTest Method for Time of Setting of Concrete
dependent upon two factors: (1) the inherent strength of the
Mixtures by Penetration Resistance
pipe and (2) the bedding of the pipe.
C425SpecificationforCompressionJointsforVitrifiedClay
Pipe and Fittings
4.2 The minimum bearing strength requirement in accor-
C684Test Method for Making, Accelerated Curing, and dance with Specification C700, as determined by the 3-edge-
Testing Concrete Compression Test Specimens (With-
bearingtestofTestMethodsC301,isameasureoftheinherent
3
drawn 2012) strength of the pipe.
C700Specification for Vitrified Clay Pipe, Extra Strength,
4.3 The tests used to measure bearing strength determine
Standard Strength, and Perforated
relative pipe strengths but do not represent actual field condi-
C828Test Method for Low-Pressure Air Test of Vitrified
tions. Therefore, an adjustment called a load factor is intro-
Clay Pipe Lines
duced to convert minimum bearing strength to field supporting
C896Terminology Relating to Clay Products
strength.The magnitude of the load factor depends on how the
C1091Test Method for Hydrostatic Infiltration Testing of
pipe is bedded. The relationship is:
Vitrified Clay Pipe Lines
Fieldsupportingstrength 5minimumbearingstrength 3loadfactor
1 4.4 Afactor of safety >1.0 and ≤1.5 shall be applied to the
This practice is under the jurisdiction of ASTM Committee C04 on Vitrified
Clay Pipe and is the direct responsibility of Subcommittee C04.20 on Methods of
fieldsupportingstrengthtocalculateasafesupportingstrength.
Test and Specifications.
The relationship is:
Current edition approved Dec. 1, 2013. Published December 2013. Originally
approved in 1915. Last previous edition approved in 2013 as C12–13. DOI:
Fieldsupportingstrength
Safesupportingstrength 5
10.1520/C0012-13A.
Factorofsafety
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5. External Loads
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
5.1 The external loads on installed vitrified clay pipe are of
The last approved version of this historical standard is referenced on
www.astm.org. two general types: (1) dead loads and (2) live loads.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C12−13a
varies with soil type, degree of saturation, degree of compac-
tion and depth of cover over the pipe. Care must be used in
selection of compaction methods so that the combined dead
loadandliveloaddoesnotexceedthefieldsupportingstrength
of the pipe, or cause a change in its line or grade.
NOTE 1—For generally accepted criteria and methods for determining
loads and supporting strengths, see Gravity Sanitary Sewer Design and
Construction, Water Pollution Control Fed
...

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: C12 − 13 C12 − 13a
Standard Practice for
1
Installing Vitrified Clay Pipe Lines
This standard is issued under the fixed designation C12; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This practice covers the proper methods of installing vitrified clay pipe lines in order to fully utilize the structural properties
of such pipe.
1.2 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.
1.3 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C301 Test Methods for Vitrified Clay Pipe
C403/C403M Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance
C425 Specification for Compression Joints for Vitrified Clay Pipe and Fittings
3
C684 Test Method for Making, Accelerated Curing, and Testing Concrete Compression Test Specimens (Withdrawn 2012)
C700 Specification for Vitrified Clay Pipe, Extra Strength, Standard Strength, and Perforated
C828 Test Method for Low-Pressure Air Test of Vitrified Clay Pipe Lines
C896 Terminology Relating to Clay Products
C1091 Test Method for Hydrostatic Infiltration Testing of Vitrified Clay Pipe Lines
D2487 Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)
D5821 Test Method for Determining the Percentage of Fractured Particles in Coarse Aggregate
3
D6103 Test Method for Flow Consistency of Controlled Low Strength Material (CLSM) (Withdrawn 2013)
3. Terminology
3.1 General—Terminology C896 can be used for clarification of terminology in this specification.
DESIGN CONSIDERATIONS
4. Supporting Strength
4.1 The field supporting strength of vitrified clay pipe is materially affected by the methods of installation. The field supporting
strength of a pipe is defined as its capacity to support dead and live loads under actual field conditions. It is dependent upon two
factors: (1) the inherent strength of the pipe and (2) the bedding of the pipe.
4.2 The minimum bearing strength requirement in accordance with Specification C700, as determined by the 3-edge-bearing test
of Test Methods C301, is a measure of the inherent strength of the pipe.
1
This practice is under the jurisdiction of ASTM Committee C04 on Vitrified Clay Pipe and is the direct responsibility of Subcommittee C04.20 on Methods of Test and
Specifications.
Current edition approved March 1, 2013Dec. 1, 2013. Published April 2013December 2013. Originally approved in 1915. Last previous edition approved in 20092013
as C12 – 09.C12 – 13. DOI: 10.1520/C0012-13.10.1520/C0012-13A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C12 − 13a
FIG. 1 Terminology
FIG. 2 Class D
4.3 The tests used to measure bearing strength determine relative pipe strengths but do not represent actual field conditions.
Therefore, an adjustment called a load factor is introduced to convert minimum bearing strength to field supporting strength. The
magnitude of the load factor depends on how the pipe is bedded. The relationship is:
Field supporting strength 5minimum bearing strength 3load factor
4.4 A factor of safety >1.0 and ≤1.5 shall be applied to the field supporting strength to calculate a safe supporting strength. The
relationship is:
Field supporting strength
Safe supporting strength 5
Factor of safety
5. External Loads
5.1 The external loads on installed vitrified clay pipe are of two general types: (1) dead loads and (2) live loads.
...