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 welded connection kit for joining first and second lined pipes together includes a coupling sleeve to connect the first and second pipes together. The coupling sleeve has a thermal break in it. The coupling sleeve includes a first coupling member that attaches to the first pipe and a second coupling member that attaches to the second pipe. The first and second coupling members attach to each other to connect the first and second pipes. A first liner lines the first pipe and includes a first flange. A second liner lines the second pipe and includes a second flange. The first and second coupling members compress the first and second flanges together to form a fluid seal.

A welded connection kit for joining first and second lined pipes together includes a coupling sleeve to connect the first and second pipes together. The coupling sleeve has a thermal break in it. The coupling sleeve includes a first coupling member that attaches to the first pipe and a second coupling member that attaches to the second pipe. The first and second coupling members attach to each other to connect the first and second pipes. A first liner lines the first pipe and includes a first flange. A second liner lines the second pipe and includes a second flange. The first and second coupling members compress the first and second flanges together to form a fluid seal.

A lockable pipeline seal, pipeline sleeve, and sealed pipeline connection for a pipeline. The pipeline seal includes a ring-shaped body having a head along a first ring end and a tail along a second ring end of the ring-shaped body, with a body portion therebetween. The ring-shaped body has an outer surface and an inner surface along its periphery. A deflection surface and abase surface are defined along the outer surface. The deflection surface is at an angle to a horizontal axis of the ring-shaped body, and a recessed grip is defined along the inner surface. The ring-shaped body is compressible such that, when the pipeline seal is installed between the pipeline sleeve and the pipeline pipe, the deflection surface is urged against the pipeline pipe and the recessed grip grippingly engages the pipeline sleeve whereby a locked seal is formed between the pipeline sleeve and the pipeline pipe.

A tubular includes a carbon steel main body defining a first flow passage. The carbon steel main body includes a first end and a second end. The carbon steel main body includes a beveled edge at the first end of the carbon steel main body. A corrosion resistant pup defines a second flow passage in-line with the first flow passage. The corrosion resistant pup includes a substantially same inner diameter and outer diameter as the carbon steel main body. The corrosion resistant pup includes a first end and a second end. The corrosion resistant pup includes a first beveled edge at the first end. The corrosion resistant pup is connected to the carbon steel main body by a weld along the beveled edge of the carbon steel main body and the beveled edge of the corrosion resistant pup.

Aspects of the present disclosure relates to methods of making a hybrid mechanically lined pipe, and apparatus thereof, such as lined pipe used for reeled pipe operations. In one implementation, a method of making a lined pipe for reeled pipe operations includes determining a minimum weld overlay length for a first pipe joint, and providing the first pipe joint. The first pipe joint includes a first end opposite of a second end, a central opening, and an inner surface. The method includes mechanically lining the inner surface of the first pipe joint with a first section of alloy. The method also includes weld overlaying a second section of alloy and a third section of alloy in the central opening and on both sides of the first section of alloy over the minimum weld overlay length to prevent excessive deformation of the mechanically bonded section during reeling operations.

A carbon steel main body defines a flow passage. The carbon steel main body includes an end. The carbon steel main body includes a beveled edge at the end. A corrosion resistant cladding is deposited along an inner surface of the carbon steel main body. The corrosion resistant cladding extends from the end to a distance into the carbon steel main body.

A metal pipe and a system of pipes, and a method of producing the same. The pipe is for conveying oil and gas. The pipe includes a metal coating in a transition region. The metal coating of the transition region obviates a subsequent coating of the inner surface of the transition region after connecting two pipes using a welding process in order to form a pipeline.

The invention relates to a method for producing a number of pipes (100) with a predetermined pipe diameter. The method includes feeding multiple pipe parts (101, 102) with the predetermined pipe diameter to a welding station (53), aligning in each case a first pipe part (101) and a second pipe part (102) coaxially with respect to one another and axially adjacent to one another, welding the pipe parts (101, 102) by means of a fully encircling weld seam (109) to form a pipe run (104), conveying the pipe run (104) to a cutting station (57) in a machine direction (A) downstream of the welding station (53), and cutting off the number of pipes (100) in a respectively designated length from the pipe run (104).

In order to reduce or remove the potential risk of heat damage in the absence of cooling jackets when joining lined pipe sections, each lined pipe section is provided with an insulatory sleeve which is disposed between the host pipe and the respective liner. The sleeves provide discrete thermal protection to the ends of the liners and, where applicable, electrofusion welds between an electrofusion fitting and the liners. The sleeves are first located in the ends of the host pipes which are then lined by drawing the liners through the host pipes via a reduction die to reduce their external diameter. The liners are then reverted towards their original dimensions resulting in a tight fitting against the internal surface of the host pipes and of the insulatory sleeves thereby compressing the insulation material.