If 20#GB 8163 steel pipes are ultrasonic tested one by one, how much higher will the ex-factory price be?
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This post was last edited by r02t on 2010-6-4 15:33 TSG D0001-2009 Pressure Pipeline Safety Technical Supervision Regulations - Industrial Pipeline Article 28 has regulations! ! But for special circumstances, please see Note 7: If it is a pipe that has been ultrasonic tested one by one and is not lower than the L2.5 requirements of GB/T 5777-2008 "Ultrasonic Flaw Detection Inspection Method for Seamless Steel Pipes", it is allowed to be used for pipes in A1.1(1) of this regulation with a design pressure not greater than 4.0MPA. If 20#GB 8163 steel pipes are ultrasonic tested one by one, how much higher will the ex-factory price be? If it is very high, wouldn’t it be uneconomical to use GB 8163 in the GC1 pipeline? If you think about it this way, GC1 pipes cannot be used with GB 8163 steel pipes, and you can’t use them even if you want to.
Why do pipes need to be tested one by one? Generally, they are randomly inspected before leaving the factory. If they fail twice, they will be 100% inspected.
Back on the second floor, according to the regulations of TSG D0001-2009, generally GB8163-2008 pipes cannot be used for GC1 pipes. They can only be used unless they meet the requirements in the attachment description and undergo ultrasonic testing one by one. In addition, the price after ultrasonic testing of pipes back to LZ GB8163-2008 is still cheaper than 316 and other pipes.
Is the poster overthinking it? But I have never encountered this situation so far.~~~~~
Reply to 3# jetxu When selecting process pipeline materials, you should mainly consider meeting process requirements and safety of use, rather than just focusing on price factors.