ASTM B88-16 pdf free download.Standard Specification for Seamless Copper Water Tube.
1 .1 This specification establishes the requirements for seamless copper water tube suitable for general plumbing, similar applications for the conveyance of fluids, and commonly used with solder, flared, or compression-type fittings. The type of copper water tube suitable for any particular application is determined by the internal or external fluid pressure, by the installation and service conditions, and by local requirements. Means of joining or bending are also factors which affect the selection of the type of tube to be used:
1.2 The tube shall be produced from the following coppers. and the manufacturer has the option to supply any one of them, unless otherwise specified.
15. Number of Tests and Retests
15.1 Tests:
1 5.1.1 chemical Analysis—Samples for chemical analysis shall be taken in accordance with Practice E255. Drillings. millings. and so forth shall be taken in approximately equal weight from each of the sample pieces selected in accordance with 14.1 and combined into one composite sample. The minimum weight of the composite sample that is to be divided into three equal parts shall be 150 g.
15.1.1.1 Instead of sampling in accordance with Practice E255, the manufacturer shall have the option of determining conformance to chemical composi flon as follows: Conformance shall be determined by the manufacturer by analyzing samples taken at the time the castings are poured or samples taken from the semi-finished product. If the manufacturer determines the chemical composition of the material during the course of manufacture, he shall not be required to sample and analyze the finished product. The number of samples taken for determination of chemical composition shall be as follows:
15. 1.1.2 When samples are taken at the time the castings are poured, at least one sample shall be taken for each group of castings poured simultaneously from the same source of molten metal.
15.1.1.3 When samples are taken from the semi-finished product. a sample shall be taken to represent each 10 000 lb or fraction thereof, except that not more than OflC sample shall be required per piece.
1 5.1.2 Mechanical Tests For the mechanical tests, a specimen shall be taken from each of the sample pieces selected in accordance with 14.1. The required mechanical test shall be made on each of the specimens so selected. The value for the Rockwell hardness number of each specimen shall be established by taking the arithmetical average of at least three readings.ASTM B88 pdf download.