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About Leading Top Union

A Suzhou-based engineering and manufacturing service provider serving EPC and OEM projects at home and abroad through supply-chain coordination and quality inspection.

Who We Are

Leading Top Union (Suzhou Leading Top Union Technology Co., Ltd.), founded in 2026, is an engineering and manufacturing service provider based in Suzhou, China. Our founder brings 17 years of industry experience (personal track record — active in steel fabrication and mechanical machining since 2008), and on that foundation we have built a collaborative network spanning steel procurement, structural fabrication and precision machining.

We serve customers directly rather than owning large production equipment. Every manufacturing task is carried out by a certified partner factory, with full-process quality control executed by our own inspectors against an inspection procedure — giving projects mature production capacity together with a single point of contact and one consistent quality standard.

Core Business

Steel Fabrication

Beams, columns, platforms, supports and stair structures, fabricated and welded to drawing.

CNC Precision Machining

CNC turning, milling and drilling for equipment parts and machined components.

Steel Supply

Procurement of common carbon and stainless steel grades, profiles and plate.

How We Work

Vacuum Equipment Fabrication Support

In addition to the three business lines above, we produce build-to-print parts for vacuum equipment OEMs and system integrators: vacuum chambers, flanges and fittings, and leak-test jigs. See vacuum equipment fabrication.

Who We Serve

EPC contractors, OEM manufacturers and project owners who need dependable structural steel or machining capacity. Whether you have a complete drawing package or only an initial requirement, we are happy to start with a conversation.

Note: all certifications referred to on this site (such as EN 1090 EXC3, ISO 3834-2, DNV and ISO 9001) are held by the respective certified partner factories. To verify certificates, please mention it in your inquiry and we will supply the partner factory's qualification documents together with our quotation.