Standards regulate the requirements for products and processes; they take into account the state of the art and ensure everyone's safety. Standards are regularly reviewed in technical committees and updated according to current findings. BUTTING supports these processes with its expert knowledge. June 2021 was that time once again. The revised edition of standard DIN EN 10217-7:2021-06 was published and includes substantial changes. This standard is of great importance to BUTTING and its customers because we manufacture many hundreds of thousands of metres of pipe for them every year.
Part 7 of DIN EN ISO 10217 contains the technical delivery conditions for welded pipes with a circular cross-section made from austenitic and austenitic-ferritic steels designed for pressure stresses and for corrosive media at room temperature, low temperatures and increased temperatures.
They are used as pressurised components in plant and power plant construction. Examples of use include the food and chemical industry.
Thomas Knöfel, Head of Quality Management, attended the standardization board on our behalf and explains that "the latest update includes various minor changes and deletions." He has summarised the most important points for us. Explicit reference is made to fact that the options for order details have changed. Until now, Option 13 in the 2015 edition referred to an optional test for intergranular corrosion. In future, Option 13 in the 2021 edition provides for a free choice of the leak test.
The standard includes a far-reaching revision in terms of delivery conditions. Section 7 specifies the manufacturing process and the types of delivery condition. The update includes the delivery condition "pickled version" for welded pipes. Thomas Knöfel explains: "Pickling is still the most widely used and best technique for making the surface of stainless steels resistant to corrosion after processing. Chemical agents during pickling remove foreign impurities or oxides. It was our aim to integrate this process into the standard."
In the subsection "Location and preparation of samples and test pieces for mechanical testing" there is the following addition: In future, for pipes welded from sheet metal with an outside diameter of >= 600 mm, the samples may be taken from a test piece on the sheet metal that corresponds to the conditions of the finished pipe.
Thomas Knöfel is pleased with the amendments. "As a member of the standardization board, my primary goal is to ensure that customers receive products that meet their quality requirements on the basis of this standard. To that end, I put BUTTING's many years of experience to good use."
If you have any questions about the new standard, please get in touch with your contact at BUTTING. Working together to achieve Progress by Tradition.
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