AS ISO 13916:2018 pdf free
AS ISO 13916:2018 pdf free.Welding – Measurement of preheating temperature, interpass temperature and preheat maintenance temperature
The temperature measurement shall normally be made on the surface of the workpiece facing the welder, at a distance of A= 4×t, but not more than 50 mm, from the longitudinal edge of the groove (see Figure 1). This shall apply for workpieces thickness tnot exceeding 50 mm in the weld.
When the thickness exceeds 50 mm, the required temperature shall exist in the parent metal for a distance of minimum 75 mm or as otherwise agreed in any direction from the joint preparation. Where practicable, the temperature shall be measured on the face opposite to that being heated. Otherwise,the temperature shall be confirmed on the heated face at a time after removal of the heat source related to parent metal thickness to allow for temperature equalization. Where fixed permanent heaters are in use and there is no access to the reverse face for temperature measurement, readings shall be taken on the exposed parent metal surface immediately adjacent to the weld preparation. The time allowed for the temperature equalization shall be of the order of 2 min for each 25 mm of parent metal thickness.
Interpass temperature shall be measured on the weld metal or the immediately adjacent parent metal.
Equipment used for temperature measurement should be specified in the welding procedure specifications, for example:
一temperature sensitive materials (e.g. crayons or paints) (TS);
一contact thermometer (CT);
一thermocouple (TE);
一optical or electrical devices for contactless measurement (TB).
If a test report is required, it shall refer to this document and give the following minimum information in accordance with the specification in welding procedure specification:
一 measured preheating temperature, in °C;
一measured interpass temperature, in °C;
一measured preheat maintenance temperature, in °C;
一any deviation from this document, if applicable.
Examples of designation, which should be used in test reports, are as follows.AS ISO 13916 pdf free download.
