How can I quickly judge from my engineering drawing whether I need to choose a welded steel chain instead of a standard roller chain?

The core judging principle is the ultimate strength and safety requirements.
Welded chains have a more robust structure and are suitable for scenarios like hoisting, towing and marine anchor chains, which demand extremely high breaking loads and have to withstand multi-directional impact forces.
If your application involves personal safety, the suspension of critical equipment (e.g., lifting heavy-duty molds), or extremely corrosive environments (e.g., offshore platforms), a welded chain is usually a more reliable choice.
Please send us your drawings, so we can further review and provide free recommendations for you.