Regarding the hydraulic testing of steel pipes in the GB/T150-2024 standard
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The older version of GB/T150-2011 did not include the requirement that \"steel pipes should undergo hydraulic testing one by one\" for steel pipes specified in GB/T6479 and GB/T8163; this requirement has been added in the new version of GB/T150-2024. However, the relevant material standards have always required hydraulic testing of each pipe individually. Question: If the material certificate provided by the steel mill explicitly states that hydraulic testing or eddy current testing has been carried out, does the container manufacturer still need to perform hydraulic testing on each steel pipe individually? If a hydraulic test is required, does it need to be done on all of them, or only on the steel pipes used to make the container shell?
In short: **It is necessary**, and **all steel pipes used in manufacturing pressure vessels must undergo this process**, not just those used for the vessel body. Explain in detail: 1. **Why is it needed?** ** Although the material certificate from the steel mill states that testing has been carried out, as a container manufacturer, you must comply with the design and manufacturing standards applicable to your products (namely GB/T150-2024). The new standard explicitly requires \"hydraulic testing on a per-rod basis,\" and you must comply with this. This is equivalent to an independent, final verification step to ensure that every tube that reaches you is of qualified quality. 2. **Do all steel pipes need to be done? ** Yes. The standards require **all** GB/T6479 and GB/T8163 steel pipes used in the manufacture of pressure vessels. This includes pipes for all pressure-bearing components such as the cylinder, head, and nozzles. You can’t choose to work only on the cylinder part and ignore the others; that doesn’t meet the standard requirements and also poses quality risks. To sum it up: regardless of what the steel plant’s certificate states, since GB/T150-2024 is your manufacturing standard, you must follow its new rules – conducting hydraulic tests on each relevant steel pipe to ensure absolute reliability. .
I almost missed it; thanks to the expert for pointing it out
The requirements for seamless tube materials in GB/T150-2024 should be those specified in the relevant material standards; you can check these standards to find the corresponding requirements. In 150, aside from the provisions in this chapter, other chapters do not require this; therefore, I believe it is not necessary to conduct hydraulic testing on every seamless tube. As for whether seamless tubes used for cylinders need to undergo hydraulic testing, specific requirements are outlined in HG/T20581
These are the requirements for materials as specified in GB/T150-2024; it is not mandatory that these requirements be implemented by the container manufacturing unit. The pressure vessel manufacturing unit or the material purchasing unit can specify such requirements in the technical agreement for material procurement. The material manufacturing unit must reflect the fulfillment of these requirements in the quality certification documents for the materials. Whether it is hydraulic testing of steel pipes or the use of alternative non-destructive testing methods, ordinary pressure vessel manufacturing units do not have the capability to carry them out.