Значение и использование

For purpose of determining compliance with the specified limits for requirements of the properties listed in the following table, an observed value or a calculated value shall be rounded as indicated in accordance with the rounding method of Practice E 29.

PropertyRounded Unit for Observed or
Calculated Value Chemical composition nearest unit in the last right-hand place of figures Tensile strength nearest ksi [nearest 5 MPa] Elongation nearest 1 % Expansion nearest 1 % Grain size nearest multiple of 0.005 mm

Реферат

This specification establishes the requirements for condenser, evaporator, and heat exchanger U-bends that are manufactured from seamless copper and copper alloy tube. The material of manufacture shall be of such quality and purity that the finished product shall have the properties and characteristics specified. The material shall conform to the chemical composition requirements specified. Tensile test, expansion test, flattening test, mercurous nitrate test or ammonia vapor test, nondestructive examination, hydrostatic test, and pneumatic test shall be made to conform to the requirements specified.

Область применения

1.1 This specification establishes the requirements for condenser, evaporator, and heat exchanger U-bend tubes that are manufactured from seamless copper and copper alloy tube.

1.2 The following safety hazard caveat pertains only to the test methods described in this specification.

1.2.1 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 to determine the applicability of regulatory limitations prior to use.

1.3 Units—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.

1.4 This specification is applicable to product 2 in. [50 mm] or less, inclusive, in diameter.

1.5 The product shall be produced from one of the following coppers or copper alloys, as specified in the ordering information:

Copper or Copper AlloyPreviously Used UNS No.Designation Type of Metal C10200 OF^Aoxygen-free without residual deoxidants C10300 ...oxygen-free, extra low phosphorus C10800 ...oxygen-free, low phosphorus C12000 DLP^Aphosphorized, low residual phosphorus C12200 DHP^Aphosphorized, high residual phosphorus C14200 DPA^Aphosphorized, arsenical C19200 ...phosphorized, 1 % iron C23000 ...red brass C44300 Type Badmiralty metal C44400 Type Cadmiralty metal C44500 Type Dadmiralty metal C60800 ...aluminum bronze C68700 Type Baluminum brass C70400 ...95-5 copper-nickel C70600 ...90-10 copper-nickel C70620 ...90-10 copper-nickel-
(modified for welding) C71000 ...80-20 copper-nickel C71500 ...70-30 copper-nickel C71520 ...70-30 copper-nickel-
(modified for welding) C72200 ...copper-nickel

^A Designations listed in Classification B 224.