A system for producing chemicals, such as, ethylene or gasoline, at high temperature (above 1100 degrees C.) having a feedstock source. The system includes a chemical conversion portion connected with the feedstock source to receive feedstock and convert the feedstock to ethylene or gasoline. The conversion portion includes a coil array and a furnace that heats the feedstock to temperatures in excess of 1100 C. or 1200 C. or even 1250 C. or even 1300 C. or even 1400 C. A method for producing chemicals, such as ethylene or gasoline, at high temperature.

A system for producing chemicals, such as, ethylene or gasoline, at high temperature (above 1100 degrees C.) having a feedstock source. The system includes a chemical conversion portion connected with the feedstock source to receive feedstock and convert the feedstock to ethylene or gasoline. The conversion portion includes a coil array and a furnace that heats the feedstock to temperatures in excess of 1100 C. or 1200 C. or even 1250 C. or even 1300 C. or even 1400 C. A method for producing chemicals, such as ethylene or gasoline, at high temperature.

A refrigerant pipe that constitutes a refrigerant circuit of a refrigeration apparatus includes: a first pipe; and a second pipe. The first pipe includes a pipe body made of stainless steel; and a connection pipe, made of a material different from stainless steel, disposed at an end of the pipe body in a pipe axial direction. The connection pipe includes a protrusion protruding in the pipe axial direction from the end of the pipe body. The second pipe includes: a second-pipe large diameter portion, made of a material that is a same as the material of the connection pipe, disposed at an end in the pipe axial direction; a second-pipe small diameter portion having a smaller diameter than the second-pipe large diameter portion; and a step portion disposed between the second-pipe large diameter portion and the second-pipe small diameter portion.

A refrigerant pipe that constitutes a refrigerant circuit of a refrigeration apparatus includes: a first pipe; and a second pipe. The first pipe includes a pipe body made of stainless steel; and a connection pipe, made of a material different from stainless steel, disposed at an end of the pipe body in a pipe axial direction. The connection pipe includes a protrusion protruding in the pipe axial direction from the end of the pipe body. The second pipe includes: a second-pipe large diameter portion, made of a material that is a same as the material of the connection pipe, disposed at an end in the pipe axial direction; a second-pipe small diameter portion having a smaller diameter than the second-pipe large diameter portion; and a step portion disposed between the second-pipe large diameter portion and the second-pipe small diameter portion.

A refrigerant pipe that constitutes a refrigerant circuit of a refrigeration apparatus includes: a first pipe; and a second pipe. The first pipe includes: a first pipe body, made of stainless steel; and a first connection, made of a material different from stainless steel, disposed at an end of the first pipe body in a pipe axial direction of the first pipe body. The second pipe includes: a second pipe body, made of stainless steel; and a second connection, made of a material identical to the material of the first connection, disposed at an end of the second pipe body in a pipe axial direction of the second pipe body. The first connection is connected to the second connection.

A refrigerant pipe that constitutes a refrigerant circuit of a refrigeration apparatus includes: a first pipe; and a second pipe. The first pipe includes: a first pipe body, made of stainless steel; and a first connection, made of a material different from stainless steel, disposed at an end of the first pipe body in a pipe axial direction of the first pipe body. The second pipe includes: a second pipe body, made of stainless steel; and a second connection, made of a material identical to the material of the first connection, disposed at an end of the second pipe body in a pipe axial direction of the second pipe body. The first connection is connected to the second connection.

Disclosed is one box body attached to an undercarriage of a trailer, and provided with a brazing area, a gastight testing area, and a finishing area aligned with one another in this order along a first side wall of the box body. In the brazing area, a plurality of members are bonded together by brazing to produce a half-finished product. In the gastight testing area, gas-tightness of the half-finished product is tested. In the finishing area, the half-finished product is covered with a thermal insulator to completely produce a pipe component. As a result, it becomes possible to properly dispose a working area, where the pipe component is produced, in the interior space of one box body without losing workability.

Disclosed is one box body attached to an undercarriage of a trailer, and provided with a brazing area, a gastight testing area, and a finishing area aligned with one another in this order along a first side wall of the box body. In the brazing area, a plurality of members are bonded together by brazing to produce a half-finished product. In the gastight testing area, gas-tightness of the half-finished product is tested. In the finishing area, the half-finished product is covered with a thermal insulator to completely produce a pipe component. As a result, it becomes possible to properly dispose a working area, where the pipe component is produced, in the interior space of one box body without losing workability.

A suction tube for a heat exchanger system includes a first tube segment and a second tube segment. The first tube segment includes a first end and a second end, wherein the first end is configured to fluidly couple to a heat exchanger of the heat exchanger system, and wherein the second end comprises a first alignment feature. The second tube segment includes an additional first end and an additional second end, wherein the additional first end is configured to couple to the second end of the first tube segment, the additional second end is configured to extend through a tubing access panel, and the additional first end comprises a second alignment feature configured to align with the first alignment feature during assembly of the heat exchanger system to align the additional second end of the second tube segment with an opening of the tubing access panel.

A suction tube for a heat exchanger system includes a first tube segment and a second tube segment. The first tube segment includes a first end and a second end, wherein the first end is configured to fluidly couple to a heat exchanger of the heat exchanger system, and wherein the second end comprises a first alignment feature. The second tube segment includes an additional first end and an additional second end, wherein the additional first end is configured to couple to the second end of the first tube segment, the additional second end is configured to extend through a tubing access panel, and the additional first end comprises a second alignment feature configured to align with the first alignment feature during assembly of the heat exchanger system to align the additional second end of the second tube segment with an opening of the tubing access panel.