The DongCheng HD071112 12-Inch (300mm) Heavy-Duty Pipe Wrench is built for demanding plumbing, industrial maintenance, and high-torque mechanical piping tasks. Designed with an extended 300mm leverage handle and a mobile jaw drop-forged from high-grade carbon steel, this wrench accommodates pipe diameters up to 40mm.

Featuring deep-cut, induction-hardened serrated jaws, it bites into steel, iron, and galvanized pipes to prevent slipping under maximum rotational force. The wrench undergoes an inactivate surface treatment to defend against rust and workplace moisture. Reinforced with a high-shear solid rivet and a heavy-duty knurled adjustment ring, it is a durable tool for professional plumbers, gasfitters, and maintenance technicians.

Key Features

• Drop-Forged Carbon Steel Mobile Jaw: Heavy hook jaw forged from premium carbon steel withstands high turning torque without flexing.
• 40mm Max Clamping Diameter: Wide-throat jaw accommodates water pipes, gas lines, and mechanical unions up to 40mm.
• High-Leverage 12" (300mm) Handle: Extended I-beam handle multiplies user torque to loosen tight, seized fittings with minimal exertion.
• Inactivate Anti-Corrosion Treatment: Specialized surface coating provides chemical and moisture resistance to prevent rust.
• Heavy Solid Rivet Pivot: Reinforced solid rivet assembly maintains jaw tracking and alignment under heavy mechanical loads.

Applications

• Industrial pipe fitting, commercial plumbing, and main water pipeline repairs
• Tightening and loosening heavy threaded galvanized, black iron, and steel pipes
• Gas pipe installation, valve assembly, and hydraulic system maintenance
• Heavy equipment servicing, pump overhauls, and boiler room infrastructure
• Fabrication workshops and site construction utility tasks

Technical Specifications

Size/Model-wise Table