Abstract

A method of manufacturing a double-walled elbow pipe segment, comprising the steps of: (a) providing an inner pipe member; (b) providing at least one first support member, and positioning said at least one first support member coaxially over said inner pipe member; (c) providing an outer pipe member and slidably positioning said assembled inner pipe member and said at least one first support member within said outer pipe member such that said at least one first support member is supportingly engaged with an outer surface of said inner pipe member and an inner surface of said outer pipe member, and (d) bending a pipe assembly of said inner pipe member, said at least one first support member and said outer pipe member into at least one first elbow section of a predetermined first angle and in a predetermined first direction between an upstream end portion and a downstream end portion of said pipe assembly.

IPC Classes  ?

• F16L 9/18 - Double-walled pipesMulti-channel pipes or pipe assemblies
• B21C 37/15 - Making tubes of special shapeMaking the fittings
• B21D 7/03 - Apparatus with means to keep the profile in shape
• F16L 43/00 - BendsSiphons

Abstract

A method of manufacturing a double-walled elbow pipe segment, comprising the steps of: (a) providing an inner pipe member; (b) providing at least one first support member, and positioning said at least one first support member coaxially over said inner pipe member; (c) providing an outer pipe member and slidably positioning said assembled inner pipe member and said at least one first support member within said outer pipe member such that said at least one first support member is supportingly engaged with an outer surface of said inner pipe member and an inner surface of said outer pipe member, and (d) bending a pipe assembly of said inner pipe member, said at least one first support member and said outer pipe member into at least one first elbow section of a predetermined first angle and in a predetermined first direction between an upstream end portion and a downstream end portion of said pipe assembly.

IPC Classes  ?

• B21D 7/024 - Bending rods, profiles, or tubes over a stationary forming memberBending rods, profiles, or tubes by use of a swinging forming member or abutment by a swinging forming member
• B21D 7/03 - Apparatus with means to keep the profile in shape
• B21D 9/01 - Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
• B21D 39/04 - Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders of tubes with tubesApplication of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders of tubes with rods
• B21D 51/10 - Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects
• B29C 53/08 - Bending or folding of tubes
• B29C 53/82 - Cores or mandrels
• B21C 37/15 - Making tubes of special shapeMaking the fittings
• B21D 9/07 - Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only