A piece of 4inch welded steel pipe has a wall thickness of 1

A piece of 4-inch welded steel pipe has a wall thickness of 1/4 inch. How much allowance should be made for two slip-on flanges at the ends of the pipe? Each slip-on flange has a 3/16 inch-thick gasket? A. 7/16 inch B. 1/2 inch C. 5/8 inch D. 11/16 inch

Solution

B. 1/2 inch

Explanation:

Allowance can be determined by keeping pipe wall thickness as minimum and pipe wall thickness plus 1/4 inch as a maximum.

So, if a wall is 1/4 inch thick, then flange has to be stick out a minimum of 1/4 inch past the end of the pipe and maximum of 1/2 inch.

In this way, welders are not burning into the gasket mounting face off.