Naylor Lockseam Spiralweld Pipe is formed from strip which is lockseamed over an internal mandrel. Naylor Lockseam Spiralweld Pipe provides greater overall strength than other steel pipe of the same wall thickness under crushing loads, compression, collapse, and beam load at supports. Naylor Lockseam Spiralweld Pipe is available in diameters from 4” up to 30” with wall thicknesses up to .164”.