Quality & Certifications
ASME "S" and "U" stamps with National Board registration. Every product tested before shipment.
Certifications
Certificates
In June 2026 TMM received ASME Certificates of Authorization and National Board authorization to register.
ASME "S"
- Scope
- Manufacture and assembly of power boilers at our plant and controlled field sites
- Certificate
- 63288
- Issued
- 2026-06-17
- Expires
- 2029-06-17
ASME "U"
- Scope
- Manufacture of pressure vessels at our plant and controlled field sites (excluding impregnated graphite)
- Certificate
- 63289
- Issued
- 2026-06-17
- Expires
- 2029-06-17
National Board "NB"
- Scope
- Register boilers, pressure vessels and other pressure-retaining items
- ASME designators
- S, U
- Issued
- 2026-06-17
- Validity
- While the ASME certificates remain valid
Inspection
Manufacturing and inspection
All fabrication, assembly and testing are done in our Wuri, Taichung plant.
- Material receivingMill test certificates (MTC) checked against specifications
- Cutting and formingPlasma cutting, 1,200-ton hydraulic press
- WeldingMIG, TIG and arc welding
- NDTNon-destructive testing per code
- Hydrostatic testPressure testing of pressure parts
- Final testBoilers fire-tested in the plant before shipment
Quality Policy
Quality policy
Excellent quality. Customer trust. Customers who choose TMM again.
Since 1960 our goal has been reliable products and complete after-sales service. We keep improving through our own development work and technology from abroad. Our management principles: trust, creation, service.
Need a quote or technical advice?
Send us your application, capacity, working pressure and fuel. We will recommend a model and quote.