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Welding certificate

The welding production management and product quality of TYHI have been up to the international standards. Since 2014, the welding workshops of Crane Subco., Mining Equipment Subco. and Rolling Equipment Subco. obtained the ISO3834-2 and EN1090-2 certificates in succession.

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    TYHI Welding Certificate

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    Mining Equipment Sub-Co Welding Certificate

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    Crane Sub-Co Welding Certificate

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    Rolling Equipment Sub-Co Welding Certificate

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    Rolling Equipment Sub-Co ISO3834 Certificate

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    Crane Sub-Co ISO3834 Certificate


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