【国外标准】 Standard Specification for Non-Asbestos Fiber-Cement Underdrain Pipe

This specification covers the standard for non-asbestos fiber-cement perforated and plain pipe proposed for use in the conveyance of drainage water for the subsurface drainage of highways, airports, farms, foundations, and other similar drainage work. The pipes shall be composed of a mixture of inorganic hydraulic binder or a calcium silicate binder formed by the chemical reaction of siliceous material and a calcareous material reinforced by organic or inorganic fibers. The material shall be cured and formed under pressure and shall be of laminar construction. The material shall also comply with the minimum specified crushing strength.1.1 This specification covers non-asbestos fiber-cement perforated and plain pipe intended for use in the conveyance of drainage water for the subsurface drainage of highways, airports, farms, foundations, and other similar drainage work.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, 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.