Biaxially oriented pipe with a thickened end portion
AssigneeSabic Global Technologies B.V.
InventorsAjay Kumar Taraiya, Ralf Kleppinger
Life of this patent
Estimating the term…
Abstract
In an aspect, a biaxially oriented pipe has a thickened end portion. The end portion has the same inner diameter as the biaxially oriented pipe and has a larger thickness than the biaxially oriented pipe. The end portion is made of the same thermoplastic polymer composition as the biaxially oriented pipe.
Claims12
A biaxially oriented pipe with a thickened end portion, wherein the thickened end portion has the same inner diameter as the biaxially oriented pipe and has a larger thickness than the biaxially oriented pipe, and wherein the thickened end portion is made of a same thermoplastic polymer composition as the biaxially oriented pipe, wherein the thickened end portion has a minimum ultimate tensile load of at least 80% of the minimum ultimate tensile load of the biaxially oriented pipe measured according to ASTM D2290.
A joined pipe comprising
- a first biaxially oriented pipe with a first thickened end portion, wherein the first thickened end portion has the same inner diameter as the first biaxially oriented pipe and has a larger thickness than the first biaxially oriented pipe, and wherein the first thickened end portion is made of a same thermoplastic polymer composition as the first biaxially oriented pipe;
- a second biaxially oriented pipe with a second thickened end portion, wherein the second thickened end portion has the same inner diameter as the second biaxially oriented pipe and has a larger thickness than the second biaxially oriented pipe, and wherein the second thickened end portion is made of a same thermoplastic polymer composition as the second biaxially oriented pipe;
- and
- a joint portion between the first biaxially oriented pipe and the second biaxially oriented pipe,
- wherein the joined pipe is obtained by joining a butt-end of the first thickened end portion of the first biaxially oriented pipe with a butt-end of the second thickened end portion of the second biaxially oriented pipe, and
- wherein the first thickened end portion has a minimum ultimate tensile load of at least 80% of the minimum ultimate tensile load of the first biaxially oriented pipe measured according to ASTM D2290.
A joined pipe comprising two biaxially oriented pipes and a joint portion between the two biaxially oriented pipes,
- wherein the two biaxially oriented pipes each have an outer diameter of 2 mm to 2000 mm and a thickness of 0.3 mm to 100 mm and are obtained by drawing a respective tube made of a thermoplastic polymer composition at an axial draw ratio of 1.1 to 5.0 and a hoop draw ratio of 1.1 to 2.0,
- wherein the joint portion is made of the same thermoplastic polymer composition as the two biaxially oriented pipes,
- wherein the two biaxially oriented pipes and the joint portion have the same inner diameter and the joint portion has a larger thickness than the biaxially oriented pipes, and
- wherein an end portion of each of the biaxially oriented pipes has a minimum ultimate tensile load of at least 80% of the minimum ultimate tensile load of each of the biaxially oriented pipes measured according to ASTM D2290.
Dependencies are inferred from the claim text.