DOSH is the acronymof the Department of Occupational Safety and Health in Malaysia. All pressurized equipment manufactured or imported for use in Malaysia shall be certified by an authorized third party inspection body as the "inspection authority" of the Department of Occupational Safety and Health for the design, manufacture and inspection process.

Domestic manufacturers can design according to relevant standards in developed countries such as ASME or BSI (the design must be signed and approved by overseas authorized inspection agencies). However, it is currently known that it is very difficult to adopt national standards. At present, the general method is to convert the drawings calculated according to the national standard into ASME code documents.

DOSH certification range:

-Pressure Vessels that design-multiplys inner diameter greater than 3000psi-inch need to apply or Malaysia DOSH certification certificate.

  1. Conduct design reviews (drawings and calculations) in accordance with DOSH approved building codes (e.g. ASME Code Volume VIII-1);

  2. Review manufacturing procedures and technical requirements, manufacturing quality control plans, etc., and establish inspection points; 

  3. Verify or inspect incoming materials; 

  4. Review welding process, process assessment record and welder assessment record; 

  5. Review of NDT procedures and personnel qualification records; 

  6. Random inspection in manufacturing process, such as weld group inspection, weld back root clearance inspection and size check etc. 

  7.Witness NDT or review NDT report / record; 

  8. Final appearance and dimension inspection, including internal and external inspection of the equipment; 

  9. Review heat treatment report (if applicable); 

  10. Witness final pressure test; 

  11. Review factory inspection records and reports; 

  12. Confirm the contents of the nameplate and the installation of the nameplate, mark and identify the item on the nameplate.