When assembling a large diameter screw pipe, which type of wrench is usually used?

When assembling a large diameter screw pipe, a chain wrench is typically the most suitable tool to use. This wrench consists of a chain that wraps around the pipe and a handle that provides leverage to tighten or loosen the connections. The design of the chain wrench allows it to grip irregular shapes and large diameters effectively, preventing slippage that might occur with other types of wrenches.

Large diameter pipes can be heavy and cumbersome, making the chain wrench's ability to apply significant torque without damaging the pipe essential for proper assembly. This tool is particularly useful in plumbing and HVAC applications where large pipes are common.

In contrast, while a socket wrench is great for fasteners with standard heads, it may not fit the large diameter of pipes well. An adjustable wrench can handle various sizes but may not provide the necessary grip or leverage required for larger assemblies, which can lead to the risk of rounding the corners of the pipe fittings. A torque wrench is specifically designed to apply a specific amount of torque to fasteners but is less practical for the initial assembly of large diameter pipes, where a firm grip and leverage are paramount.