M.Y. implemented its own quality assurance system in conformity with ISO 9002, and was certified in 1998. The commitment to quality engineering is however a company wide entrenched principle. This quality engineering system covers the activities of quality control, process control, alloy designing, and technical supports to fully meet customers' operational and potential requirements.

Quality Control

At M.Y., on-line and impassible controlling process are installed integrating totally with production, to assure adequate coverage of all customers needs. Specific quality assurance control points for production of petrochemical assemblies are the following:

• Check design calculation and alloy selection.
  
• Order technical review and Launching.
  
• Chemical analysis controls: by using SPETROLAB and coupons of patented alloys, more than 30 kinds of elements (including Ti, Zr, RE) can be simultaneously analyzed within 30 seconds.
  
• Room temperature mechanical characteristics control.
  
• Short time shell rupture test.
  
• 100% combined low-pressure Air test / Fluorescent penetrant testing of all tube external surface, which is one unique characteristics of M.Y. to find quickly and easily the slightest defect on the surface.
• 100% dimensional inspection of tube ends.
  
• 100% Eddy-current test of all machined tube inside surface: another characteristics, a reliable method to detect the presence of tooling grooves and internal metal intergrity.
• 100% liquid penetrant inspection of all tube weld bevels.
  
• Micro-structural control.
  
• 100% liquid penetrant of butt weld root passes and cover passes.
  
• 100% radiographic of complete tube to tube or tube to fitting butt welds.
  
• Hydrostatic test of completed assemblies.

Process Control

- All critical parameters at M.Y. facilities are controlled by real time process control devices. Variation is held to a minimum to further ensure consistent production.
- Launching Sheet and Launching Meetings are the routine in M.Y. to guarantee its accuracy, and to be understood by each operator.
- Pilot tube (castings): All new casting configuration methods undergo a special "piloting" process under the direction of the Technical Manager. Until the pilot castings are released for production, the production quantities are not commenced.
- Travelling Card: a unique recording sheet for each product travelling along with the product through whole process, with confirmation and signature of each operator. By such, the integrity of process control and traceability of products is gained.