초록 ▼

A field assembled gas riser includes an adapter having plural inner grooves that receive the outer surface of a plastic gas line as it is plastically deformed by axial insertion of a stiffener into the gas line. The gas line is terminated at a desired location, the adapter slid over the terminated e

A field assembled gas riser includes an adapter having plural inner grooves that receive the outer surface of a plastic gas line as it is plastically deformed by axial insertion of a stiffener into the gas line. The gas line is terminated at a desired location, the adapter slid over the terminated end, and a stiffener manually inserted into the gas line. Continued axial advancement of the stiffener acts as a mandrel to plastically deform the gas line into the grooves and provide a secure, sealed arrangement.

대표청구항 ▼

A field assembled riser comprising: a plastic tubular gas line having an inner diameter, a preselected wall thickness, a preselected outer diameter, and a terminal end; a generally cylindrical stiffener having a reduced diameter at a first end freely received in the gas line, a shoulder at a second

A field assembled riser comprising: a plastic tubular gas line having an inner diameter, a preselected wall thickness, a preselected outer diameter, and a terminal end; a generally cylindrical stiffener having a reduced diameter at a first end freely received in the gas line, a shoulder at a second end having an enlarged diameter substantially greater than the inner diameter of the gas line to prevent further insertion of the stiffener therein, and a series of spaced lands disposed between the first and second ends of the stiffener; and an adapter received over the gas line adjacent the terminal end thereof, the adapter having a series of axially spaced, circumferential grooves defined along an inner diameter of the adapter, the grooves being interconnected by shoulders that extend radially inward from the grooves and are dimensioned for free sliding receipt over the outer diameter of the gas line, the adapter further including a series of stepped counterbores along the inner diameter between one end of the adapter and the grooves and shoulders, the counterbores having a diameter greater than the shoulders to cooperate with the stiffener to preliminarily hold the gas line between the stiffener and adapter as the stiffener is advanced axially further into the adapter and the outer diameter of the gas line is plastically deformed into the grooves of the adapter.