What is the outside diameter of an IP pipe with a 2 inch callout?

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Multiple Choice

What is the outside diameter of an IP pipe with a 2 inch callout?

Explanation:
In IP pipe sizing, the number you see on the callout (2 inches) is the nominal size, not the actual outside diameter. For an iron pipe with a 2 inch nominal size, the outside diameter is a fixed 2.375 inches, which is 2 3/8 inches. This comes from standard pipe dimensions where each nominal size has a specific outside diameter, regardless of wall thickness. So the correct choice is 2 3/8 inches. The other measurements don’t match the standard outer diameter for a 2 inch nominal pipe.

In IP pipe sizing, the number you see on the callout (2 inches) is the nominal size, not the actual outside diameter. For an iron pipe with a 2 inch nominal size, the outside diameter is a fixed 2.375 inches, which is 2 3/8 inches. This comes from standard pipe dimensions where each nominal size has a specific outside diameter, regardless of wall thickness. So the correct choice is 2 3/8 inches. The other measurements don’t match the standard outer diameter for a 2 inch nominal pipe.

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