Причина отмены Two methods of classifying long-term strength are included: (1) based on cyclic loads for use in those liquid-handling applications where the effects of pumping by duplex or triplex pumps or other cyclic pressure loads dictate the performance requirements of the piping, and (2) based on the steady (static) loads such as would be required for gas service applications.

Formerly under the jurisdiction of Committee D20 on Plastics, this standard was withdrawn in August 2017. This standard is being withdrawn without replacement due to its limited use by industry.

Реферат

This classification covers machine-made "fiberglass" (glass-fiber-reinforced thermosetting-resin) pressure pipes. Both glass-fiber-reinforced thermosetting-resin pipes (RTRP) and glass-fiber-reinforced polymer mortar pipes (RPMP) are fiberglass pipes. Classifications are made on the basis of the method of manufacture (type), the raw materials in the body used in construction (grade), the liner material (class), and the test performance of the product type under long-term cyclic pressure strength or long-term static pressure strength. Classifying long-term strength are based on two methods as follows: cyclic loads for use in those liquid-handling applications where the effects of pumping by duplex or triplex pumps or other cyclic pressure loads dictate the performance requirements of the piping; and steady (static) loads such as would be required for gas service applications.

Область применения

1.1 This classification covers machine-made “fiberglass” (glass-fiber-reinforced thermosetting-resin) pressure pipe. Methods of classification, requirements, test methods and the method of marking are included. Both glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are fiberglass pipes.

Note 1—For the purposes of this standard, polymer does not include natural polymers.

1.2 This classification is based on the method of manufacture, the type of materials used in construction, and the test performance of the product type. It is not based on dimensions or raw material specifications.

1.3 Two methods of classifying long-term strength are included: (1) based on cyclic loads for use in those liquid-handling applications where the effects of pumping by duplex or triplex pumps or other cyclic pressure loads dictate the performance requirements of the piping, and (2) based on the steady (static) loads such as would be required for gas service applications.

1.4 The values stated in inch-pound units are to regarded as the standard. The values in parentheses are provided for information only.

1.5 The following precautionary caveat pertains only to the test method portion, Section 7, of this classification. 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.

Note 2—There is no known ISO equivalent to this standard.