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Hydrostatic Testing <br /> Hydrostatic inspection test pressures for plain end and threaded and coupled pipe are specified. Hydrostatic pressure shall be <br /> maintained for not less than 5 seconds for all sizes of seamless and electric-resistance-weld pipe. <br /> Mechanical Tests Specified <br /> Tensile Test -- Transverse required on ERW for NPS 8 and large. Sending Test (Cold) -- STD and XS-NPS 2 and under XXS-NPS 1 <br /> 1/4 and under. <br /> Degree of Bend Diameter of <br /> Mandrel <br /> For Normal A53 90 12 x nom dia. of <br /> Uses pipe <br /> For Close Coiling 180 8 x nom dia. of <br /> pipe <br /> Flattening Test -- NPS 2 and larger STD and XS. (Not required for XXS pipe.) <br /> Lengths <br /> Standard Weight <br /> Single Random -- 16' - 22'. 5% may be jointers. If Plain Ends -- <br /> 5% may be 12' - 16'. <br />