A ducting system includes an elongate duct section or length and formed flange connectors at each end of the duct. Both the duct section and the flange connectors are elliptical in cross section, defined by a major axis and a minor axis. The elliptical cross section has the advantage of reducing the overall height of the duct system along minor axis, as well as defining a rigid structure due to there being no flat surface about the circumference of the duct, while also capable of transporting a significant volume of air relative to a circular duct system of the same size perimeter.

A sealed airflow system suitable for use with a sample shaker assembly. The sealed airflow system includes at least one component which accommodates movement of the sample shaker assembly while maintaining an air tight assembly between components of the sealed air flow system. A compliant sliding seal compensates for movement of the sample shaker assembly with regard to an air intake side of the sealed airflow control system. Additionally, a flexible conduit provides an air tight passage between an outlet of the sealed airflow control system and an exhaust port. The flexible conduit compensates for movement of the sample shaker assembly in a manner that does not permit unwanted airflow into or out of sealed airflow control system.

The present invention provides a transfer line exchanger which is optimized for one or more objective functions of interest such as pressure drop, erosion rate, fouling, coke deposition and operating costs. The transfer line exchanger is designed by computer modeling a transfer line exchanger in which the cross section of flow path is substantially circular and modeling the operation of the transfer line under industrial conditions to validate the model design and its operation. Then iteratively the model design is deformed and the operation of the deformed part is modeled and compared to values obtained with other deformed models until the value of the objective function is optimized (e.g. at an extreme) or the change in the objective function is approaching zero.

A forming device which expands a metal pipe material to form a metal pipe having a pipe portion and a flange portion includes a hardness lowering portion which lowers a hardness of the flange portion to be lower than a hardness of the pipe portion.

Helically reinforced, flexible tubing or hose is formed from continuously extruded thermoplastic material helically circumferentially wound at a wrapping station around an array of bearing-supported rods that are concurrently but individually turned and are adjustably canted relative to an imaginary center axis. The tubing or hose being formed has a continuous reinforcing rib helically wound therearound and continuously integrally connected thereto. The resulting tubing or hose may be transversely severed at intervals along its length to provide discrete lengths of hose that are annealed while axially compressed to relieve stress.

A guiding pipe for a water sprayer, and the water sprayer has a handle with an intake end configured to connect to a water source and another end connected a spray head through a guiding pipe. The guiding pipe has a spiral main tube provided with a respective circular connecting section at each end, and the circular connecting sections are respectively connected to the handle and the spray head.

A drill pipe has a tubular body with a first end, a second end, an outer wall and an inner wall. A first connection end is connected to the first end of the tubular body and a second connection end is connected with the second end of the tubular body. The first connection end and the second connection end have an inner wall and an outer wall, the outer wall is substantially cylindrical in shape and the inner wall defines a central cavity. The first connection end and the second connection end are sized to allow for mating with a corresponding drill pipe. The outer wall of the tubular body is substantially cylindrical in shape. The inner wall of the tubular body defines a central cavity that is in fluid communication with the central cavity of the first connection end and the second connection end. The inner wall has at least one land and at least one groove. The at least one groove has at least one twist along the length of the tubular body.

A flexible hose assembly includes a length of tubular hose formed from a spiral-wrapped layer of polymer material. A helical stiffener is disposed on an outer surface of the tubular hose. The helical stiffener comprises an elastomer material that is configured to bond or adhere to the polymer material of the tubular hose.

A multilayer composite containing the following layers: I. a first layer (layer I) of a moulding compound containing at least 40 wt. % of the following components: 1) 60 to 99 parts by wt. of a copolyamide based on hexamethylenediamine, terephthalic acid and an aliphatic dicarboxylic acid having 8 to 19 carbon atoms and 2) 40 to 1 parts by wt. of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; and II. a second layer (layer II) of a moulding compound containing at least 60 wt. % of fluoropolymer, has a high heat distortion temperature, a very good impact resistance, a high elongation at break and good layer adhesion.

A multilayer composite containing the following layers: I. a first layer (layer I) of a moulding compound containing at least 40 wt. % of the following components: 1) 60 to 99 parts by wt. of a copolyamide based on hexamethylenediamine, terephthalic acid and an aliphatic dicarboxylic acid having 8 to 19 carbon atoms and 2) 40 to 1 parts by wt. of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; and II. a second layer (layer II) of a moulding compound containing at least 60 wt. % of fluoropolymer, has a high heat distortion temperature, a very good impact resistance, a high elongation at break and good layer adhesion.