Differences between GB/T14976 and ASME16.9
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Dear colleagues in the offshore oil industry, what is the difference between GB/T14976 and ASME16.9? What does it mean when both standards are indicated on a stainless steel pipe?
What is 16.9? ASME B16.9-2012 Factory-made forged steel butt-welded pipe fittings; GB-T 14976-2012 Stainless steel seamless pipes for fluid transport
I can’t figure it out; as mentioned on floor 3, ASME B16.9-2012 refers to the manufacturing standards for forged steel butt-welded pipe fittings produced in factories. It is a standard for manufacturing such fittings as elbows, tees, reducers, etc., and it is not a material standard – the material can be carbon steel, stainless steel, alloys, etc； GB-T 14976-2012 Stainless steel seamless tubes for fluid transport – this is a material standard for pipelines, not a manufacturing standard; manufacturing standards can include GB/T 8163, ASME B36.10/36.19, etc.
GB-T 14976-2012 stainless steel seamless tubes for fluid transport can be used as raw material for forged welded steel fittings manufactured in accordance with ASME B16.9-2012
GB/T14976 is the standard for steel pipes, while ASME16.9 is the standard for welded pipe fittings.
Isn’t GB12459-2005 the standard for welded seamless pipe fittings? Why do pipe fitting manufacturers still use the ASME16.9 standard instead of national standards?
Isn’t GB12459-2005 the standard for welded seamless pipe fittings? Why do pipe fitting manufacturers still use the ASME B16.9 standard instead of national standards?
Isn’t GB12459-2005 the standard for welded seamless pipe fittings? Why do pipe fitting manufacturers still use the ASME B16.9 standard instead of national standards?
Regarding GB/T12459-2005 for steel pipe fittings, many enterprises lack a sense of compliance in their production processes. . Mark the standard according to what the procurement standard is. . . Although the key dimensions in 12459 and 16.9 are the same, it’s possible that they represent the inventory batch of 16.9 that was produced and sent to you directly.
If both of these standards are indicated on the pipe, it is likely an error in labeling; GB/T14976 is the standard for stainless steel seamless pipes, while B16.9 is a dimensional standard for fittings in the American standard system. It should not be written that way. If it is a fitting, then there is another way to interpret it.