For pipes measuring 4", 6", 8", and 10", what are the dimensions of steel washers?

In the context of the NFPA 24 standards, steel washers are used to ensure proper sealing and load distribution when installing fire service mains. The dimensions of steel washers need to match the pipe diameter to maintain structural integrity and prevent leaks.

For pipes measuring 4", 6", 8", and 10", the size of the washers plays a critical role. The correct choice of 1/2 in. x 3 in. is appropriate because the inner diameter of the washer corresponds to the nominal size of the pipes, allowing it to fit snugly around the pipes without excessive gap or play. The width of the washer also provides adequate surface area for support, reducing potential stress points on the connections.

Using a washer that is too large or small could lead to improper sealing, risking water damage or failure of the fire service system. Thus, the 1/2 in. inner diameter effectively complements the dimensions of typical fire service mains within the specified range, ensuring functionality and compliance with the standards set forth by NFPA 24.