→ASTM B88 Standard Specification for Seamless Copper Water Tube
The annealed (O) tube shall be capable of being expanded in accordance with Test Method B153 with an expansion of the outside diameter in the following amount:
The expanded tube shall show no cracking or rupture visible to the unaided eye.
→Flattening test: as an alternative to the expansion test for tube standard sizes 4 in. and over in the annealed condition, a section 4 in. In length shall be cut from the end of one of the lengths for a flattening test. This 4-in. Test specimen shall be flattened so that a gage set at three times the wall thickness will pass over the tube freely throughout the flattened part. The tube so tested shall develop no cracks or flaws visible to the unaided eye as a result of this test.
→ASTM B837 Standard Specification for Seamless Copper Tube for Natural Gas and Liquified Petroleum (LP) Gas Fuel Distribution System
→GB/T18033-2007 Seamless Copper Tube for Water and Gas