At the raw material stage the same is checked visually for any kind of surface defects such as cracks, seams, overlapping, pitting, as well as dimensionally. A chemical & physical test is carried out before selecting the Raw material. After acceptance of raw material a control number is issued and this is punched/marked on whole of the Raw material is to be use.
In Manufacturing Of Fittings, Flanges, etc. At the time of cutting, The control number is transferred on each cut pieces and the same is transferred after every operation of forging or forming in case of Invisibility of the same. After each forging or Forming process the material is checked visually for surface crack.
Here treatment is carried out after final forging or forming as required by the code. After final forging or heat treatment a batch number is assigned to a lot and this batch number is stamped on each Pipes, Tubes, fittings, Flanges, Etc. and on the temperature chart which is automatically generated by temp. recorder coupled with the heating furnace. Time of final forging/forming & date is also mentioned on the chart.