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This specification covers non-asbestos fiber-cement conduit for use in electric-power systems and communication systems. The service is for both underground and exposed conditions. The classes of conduit shall be as follows: Class B which is intended for use encased in concrete after installation and Class B which is intended for use without concrete encasement, or for exposed services. The types of conduit shall be known as Type I and Type II corresponding to the chemical requirements specified. Type I is to be used where nonaggressive water and soil of moderate surface content are expected to come in contact with the conduit. Type II is to be used where moderately aggressive water or water and soil of high sulfate content, or both, are expected to come in contact with the conduit. Fiber-cement conduit shall be composed of an intimate mixture of an inorganic hydraulic binder or a calcium silicate binder formed by the chemical reaction of a siliceous material and a calcareous material reinforced by organic fibers, inorganic non-asbestos fibers, or both. Process aids, fillers and pigments which are compatible with fiber-reinforced cement are not prohibited from being added. All material shall be of laminar construction formed under pressure to a homogeneous structure and cured to meet the physical and chemical requirements. Mechanical properties like flexural strength and crushing strength of the conduit shall be determined.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers non-asbestos fiber-cement conduit for use in electric-power systems and communication systems. The service is for both underground and exposed conditions.
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Other StandardsNationalMotorFreight Classification Rules Available from National Motor Freight Inc., 1616 P St., NW, Washington, DC 20036.
C150 Specification for Portland Cement
C497 Test Methods for Concrete Pipe, Manhole Sections, or Tile
C500 Test Methods for Asbestos-Cement Pipe
C595 Specification for Blended Hydraulic Cements
C1154 Terminology for Non-Asbestos Fiber-Reinforced Cement Products
Military StandardMIL-STD-129 Marking for Shipment and Storage Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.
Federal StandardNo.123 Marking for Domestic Shipment (Civilian Agencies)
ISO StandardsISO3951 Sampling Procedures and Charts for Inspection by Variables for Percent Nonconforming
ICS Number Code 23.040.50 (Pipes and fittings of other materials)
UNSPSC Code 40170000(Pipe piping and pipe fittings); 30111600(Cement and lime)