초록 ▼

A liquefiable gas pressure cylinder and method for making the same with the cylinder including a cylindrical shell, and heads fusion welded at opposites ends of the shell. The side ends where the heads are joined to the shell are crimped radially inward to each end to form chimes. The welds are 100%

A liquefiable gas pressure cylinder and method for making the same with the cylinder including a cylindrical shell, and heads fusion welded at opposites ends of the shell. The side ends where the heads are joined to the shell are crimped radially inward to each end to form chimes. The welds are 100% radiographed and heat treated. The heads are dished to have a domed center portion which has a profile and thickness so that the domed center portions will reverse before any other part of the cylinder is stressed beyond a yield limit for such part.

대표청구항 ▼

1. Method of making a liquefiable gas pressure cylinder comprising the steps of:forming a cylindrical shell including a cylinder body and end portions; forming two heads, each head having a domed center portion and a flanged periphery, said flanged periphery having a cylinder portion surrounding the

1. Method of making a liquefiable gas pressure cylinder comprising the steps of:forming a cylindrical shell including a cylinder body and end portions; forming two heads, each head having a domed center portion and a flanged periphery, said flanged periphery having a cylinder portion surrounding the domed center portion and a radially extending edge portion, an outer diameter of the cylinder portion being equal to an internal diameter of said shell; press-fitting said two heads at opposite ends of said shell with said domed center portion extending axially inwardly, and said cylinder portion being fitted into said end portions of said shell; fusion welding said end portions and said flanged periphery together; and cold forming said end portions and said flanged periphery radially inwardly.