Patent ID: 8019048

Claim:
A window arrangement on a pressure pipe for vulcanising or crosslinking of sheathings of electric cables, with a casing along or at the end of the pressure pipe, said casing featuring flanges on diametrically opposing sides having radially directed passages, wherein the axes of the passages are perpendicular to the longitudinal axis of the pressure pipe and are in a measurement plane for an x-ray measurement device, an x-ray source being associated to the one passage on the outer side and a receiver sensitive to X-rays to the other passage, and with upper and lower window plates that are transmissive for X-rays which are sealingly arranged in one of the passages, respectively, and are fixed in the respective passage with the aid of fastening means and which consist of a temperature-resistant material which is also resistant against etchings by chemically aggressive substances, wherein the arrangement of at least the lower window plate ( 20 ) and a temperature control of at least the lower window plate ( 20 ) are realised such that the temperature of at least the lower window plate ( 20 ) is below the dew point of the gas atmosphere in the pressure pipe ( 10 ), wherein at least the lower window plate ( 20 ) is arranged in a skewed manner, and wherein the fastening means are arranged such that they do not prevent condensate from draining off at least the lower window plate ( 20 ) into the pressure pipe ( 10 ).