Abstract: In a device for optically measuring the external-thread profile of a pipe, comprising a support for the pipe to be measured and an optical measuring unit including at least one measuring device comprising a light source and a camera arranged in the optical path of the light source for recording a silhouette image of the external-thread profile, wherein the optical measuring unit is, in particular rigidly, mounted on a carrier element pivotally held about three spatial axes, the optical measuring unit comprises at least two measuring devices whose optical paths cross each other.

Abstract: In a device for optically measuring the external-thread profile of a pipe, comprising a support for the pipe to be measured and an optical measuring unit including at least one measuring device comprising a light source and a camera arranged in the optical path of the light source for recording a silhouette image of the external-thread profile, wherein the optical measuring unit is, in particular rigidly, mounted on a carrier element pivotally held about three spatial axes, the optical measuring unit comprises at least two measuring devices whose optical paths cross each other.

Abstract: The invention relates to a method and to an apparatus for producing pipes made of steel. According to the invention, within a period of time of no more than 20 seconds after the last deformation at a temperature greater than 700° C., but less than 1050° C., during passage a cooling medium is applied with elevated pressure onto the outside circumference of the pipe over a length of greater than 400 times the pipe wall thickness in a quantity which during rapid cooling provides an equivalent cooling speed of greater than 1° C./second of the pipe wall over the pipe length to a temperature in the range of 500° C. to 250° C., whereupon further cooling of the pipe down to room temperature is carried out by exposure to air.

Abstract: The invention relates to a method and to an apparatus for producing pipes made of steel. According to the invention, within a period of time of no more than 20 seconds after the last deformation at a temperature greater than 700° C., but less than 1050° C., during passage a cooling medium is applied with elevated pressure onto the outside circumference of the pipe over a length of greater than 400 times the pipe wall thickness in a quantity which during rapid cooling provides an equivalent cooling speed of greater than 1° C./second of the pipe wall over the pipe length to a temperature in the range of 500° C. to 250° C., whereupon further cooling of the pipe down to room temperature is carried out by exposure to air.