... flat tube, oval tube, fan-shaped tube, polygonal tube, single and double groove pipe, tube frame High precision welding mold 1. ... Description: a.Roller and mould, welded pipe roller, stainless steel pipe mould for round/square/shaped ... pipe, tube frame, special-shaped mould, etc.3. Specification range for round pipe: 5-325mm.4. Specification range for square pipe: ...