Method for adjusting specific quality characteristics and properties of pipes by means of a pressure test
AssigneeEisen- und Metallwerke Ferndorf GmbH
InventorsSiegfried Thomalla, Franz-Josef Schmeck, Hans-Joachim de la Camp
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Abstract
The invention relates to a method for adjusting specific quality characteristics and/or properties of pipes (1) by means of a pressure test, especially for steel pipes of pipe conduits for combustible media. According to said method, in addition to the water volume required for the pressure test according to DIN EN 10208 part 2, an additional water volume (12) is filled into every single pipe (1) with the proviso that the pipe material is slightly subjected to plastic stress.
Claims5
A method for adjusting specific quality characteristics and/or properties of steel pipe by pressure testing, comprising the steps of:
- pumping water into an interior of the steel pipe;
- conducting a hydrostatic pressure test pursuant to DIN EN 10208 Part 2 using the pumped-in water;
- and
- pumping a predetermined additional volume of water into the steel pipe ongoing from the hydrostatic pressure test so that the steel pipe is slightly stressed in the plastic range.
Dependencies are inferred from the claim text.