![]() Also, the letters"NDE"shall be appended to the product specification number and material grade shown on the certification. The certification, where required, shall state"Nondestructive Electric Tested" and shall indicate which of the tests was applied. Where the nondestructive electric test is performed, the lengths shall be marked with the letters"NDE". the marking of each length of pipe so furnished shall include the letters"NDE".It is the intent of this nondestructive electric test to reject pipe with imperfections the produce test signals equal to or greater than that produced by the applicable calibration standard. Where the hydrostatic test and the nondestructive electric test are omitted and the lengths marked with the letters"NH",the certification,where required,shall clearly state"Not Hydrostatically Tested", and the letters"NH" shall be appended to the product specification number and material grade shown on the certification.Īs an alternative to the hydrostatic test at the option of the manufacturer or where specified in the purchase order as an alternative or addition to the hydrostatic test, the full body of each pipe shall be tested with a nondestructive electric test. the diameter of which is eight times the outside diameter (as shown in ASME B 36.10M) of the pipe, without failure.Įach length of pipe shall be subjected to the hydrostatic test without leakage through the pipe wall.Īs a alternative to the hydrostatic test at the option of the manufacturer or where specified in the purchase order, it shall be permissible for the full body of each pipe to be tested with a nondestructive electric test. Wehn ordered for close coiling, the pipe shall stand being bent cold through 180°around a cylindrical mandrel. Hot-finished pipe need not be heat treated.When hot finished pipe is heat treated, it shall be heat treated at a temperature of 1200☏(650℃) or higher.Ĭold drawn pipe shall be heat treated after the final cold draw pass at a temperature of 1200☏(650℃) or higher.įor pipe NPS2(DN50) and under, a sufficient length of pipe shall stand being bent cold through 90°around a cylindrical mandrel, the diameter of which is twelve times the outside diameter(as shown in ASME B 36.10M) of the pipe,without developing cracks. The producer shall remove the transition material by any established procedure that positively separates the grades. When steels of different grades are sequentially strand cast, identification of the resultant transition material is required. Steel cast in ingots or strand cast is permissible. If secondary melting, using electroslag remelting or vacuum-arc remelting is subsequently employed, the heat shall be defined as all of the ingots remelted from a single primary heat. The steel shall be killed steel, with the primary meltling process being open-hearth,basic-oxygen,or electric-furnace,possibly combined with separate degassing or refining. ASTM A106 pipe is always produced by the seamless method and can be bent, coiled and flanged. ![]()
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