1. Material: Carbon steel or ductile iron acc. To customers request.

2. Process:
. Raw parts realised by Chinese lost wax process or by Close die forgings acc. To drawings.
. Machining including NPT threads realised by NC lathe.

3. QC involved:
. Chemical composition by OBLF spectrumeter,
. Microstructure tester after heat treatment.
. Crack by MR detector.
. Dimension can de controlled by Hexagon CMM.
. Air pressure testing can be added if necessary

4. Reports supplied:
. 3.1B material certificate
. Dimension reports for AQL quantity