Metal strip

摘要

Provided is a metal strip for a pipe with which the weight of a pipe can be reduced while maintaining the strength of a joint portion that tends to be structurally the weakest. A metal strip L is formed by rolling. The thickness of each of a head end portion 1a and a tail end portion 1b, which are longitudinal end portions 1, is greater than the thickness of an intermediate portion excluding the longitudinal end portions 1. The metal strips are connected to each other in series by welding, and a pipe is made by performing a pipe-forming operation.

主权项

1. A metal strip, comprising:
two longitudinal end portions, a longitudinal intermediate portion between the two longitudinal end portions, and two inclined portions connecting respective ones of the two longitudinal end portions to the longitudinal intermediate portion, each of the two longitudinal end portions having a thickness greater than a thickness of the longitudinal intermediate portion, each of the two inclined portions having a thickness that continuously and monotonically decreases from the respective one of the two longitudinal end portions to the longitudinal intermediate portion, the thickness of at least one of two longitudinal end portions continuously and monotonically decreases from an end surface thereof toward the inclined portion connected thereto, and a rate of change at which the thickness of the at least one of the two longitudinal end portions continuously and monotonically decreases along the longitudinal direction is smaller than a rate of change at which the thickness of the respective one of the two inclined portions decreases.