Device and method for preparing heat shrinkable tape mounting system for laboratory

Abstract

The invention relates to the technical field of oil and gas pipeline anti-corrosion joint coating, in particular to a preparation device and method of a heat shrinkable tape installation system for a laboratory, and aims at solving the problems that an existing preparation mode is low in efficiency and unstable in quality. The preparation device provided by the invention comprises a transfer assembly, a preheating assembly and a heating assembly, the transferring assembly is used for transferring pipe sections. The preheating assembly is used for preheating the pipe sections. The heating assembly comprises an infrared heating unit, and the infrared heating unit is arranged on the pipe section wrapping the heat shrinkage belt in a sleeving mode and used for heating and tempering the heat shrinkage belt so that the heat shrinkage belt installation system for the laboratory can be manufactured. According to the device, parameters such as preheating temperature, primer brushing time, drying time, heating and tempering temperature and time for mounting the thermal contraction band and the like are accurately controlled by adopting a mechanical means, so that the quality and the working efficiency of a mounting system in a laboratory are improved, and support is provided for large-scale and high-quality preparation of the thermal contraction band mounting system for the laboratory; and the service quality of laboratory detection is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas pipeline anticorrosion patching, and particularly relates to a laboratory heat shrinkable tape installation system preparation device and method. BACKGROUND

[0002] The anticorrosion patching material of long-distance oil and gas pipeline mainly adopts heat shrinkable tape. According to the requirements of the national standards GB / T 51241-2017 and GB / T 23257-2017, before the anticorrosion construction of the oil and gas pipeline, the laboratory needs to be commissioned to detect the material performance of the heat shrinkable tape. When the laboratory detects and evaluates the performance of the anticorrosion material, the heat shrinkable tape needs to be installed on a steel pipe section with a pipe diameter of 114 mm and a length of 100 mm or 320 mm to form a laboratory heat shrinkable tape installation system. At present, when the laboratory prepares the laboratory heat shrinkable tape installation system, the method of manually using a torch to prepare the installation system is generally adopted, and there are problems of low preparation efficiency, inability to accurately control the heating temperature, poor reproducibility and unstable quality. SUMMARY

[0003] The present application aims to provide a laboratory heat shrinkable tape installation system preparation device and method to solve the problems of low efficiency and unstable quality of the existing preparation method.

[0004] To solve the above technical problems, the technical scheme provided by the present application is as follows:

[0005] A laboratory heat shrinkable tape installation system preparation device, the laboratory heat shrinkable tape installation system includes a pipe section and a heat shrinkable tape wrapped around the pipe section, and comprises a transfer assembly, a preheating assembly and a heating assembly;

[0006] The transfer assembly is used for transferring the pipe section, and the preheating assembly is used for preheating the pipe section.

[0007] The heating assembly comprises an infrared heating unit, the infrared heating unit is sleeved on the pipe section wrapped with the heat shrinkable tape, and is used for heating and tempering the heat shrinkable tape to prepare the laboratory heat shrinkable tape installation system.

[0008] Further, the transfer assembly comprises a vehicle frame, a first component column extending in the horizontal direction is arranged on the vehicle frame, and the first component column can be inserted into the pipe section to carry the pipe section.

[0009] Further, a pipe storage bin is arranged on the vehicle frame, and the pipe storage bin is used for storing the pipe section.

[0010] Further, the transfer assembly further comprises a castor wheel connected below the vehicle frame.

[0011] Further, the preheating assembly comprises a heating coil and a coil support, the heating coil being wound on the coil support.

[0012] Further, the preheating assembly further comprises a preheating base, the coil support being mounted on the preheating base.

[0013] The preheating base is provided with limiting blocks, two groups of the limiting blocks being arranged in a vertical direction perpendicular to an axis of the heating coil in a horizontal plane, and the two groups of the limiting blocks being located on two sides of the transfer assembly.

[0014] Further, the heating assembly further comprises a heating base, the heating base being provided with a second component column, the second component column being inserted into and bearing the pipe segment wrapped with the heat shrinkable tape.

[0015] Further, the heating assembly further comprises a pusher, the pusher comprising a telescopic push rod and a push block, the push block being connected with an extended end of the telescopic push rod, the telescopic push rod being extended to drive the push block to move, and then the push block pushes the laboratory heat shrinkable tape installation system out of the infrared heating unit.

[0016] Further, the heating assembly further comprises a control valve, the control valve being connected with the telescopic push rod for controlling extension and retraction of the telescopic push rod.

[0017] In another aspect of the present application, a laboratory heat shrinkable tape installation system preparation method is provided, which uses the laboratory heat shrinkable tape installation system preparation device described above, and comprises the following steps:

[0018] Preparation of pipe segment: after rust removal by sand blasting, the pipe segment of a pre-determined size is loaded into the transfer assembly.

[0019] Preheating of pipe segment: after the transfer assembly is moved to the preheating assembly, the preheating assembly heats the pipe segment.

[0020] Primer application: the transfer assembly is moved to move the transfer assembly carrying the pipe segment out of the preheating assembly, and then primer application is performed.

[0021] Winding of heat shrinkable tape: after the primer dries, the heat shrinkable tape is wound on the pipe segment, and the heat shrinkable tape is fixed by a fixing piece.

[0022] Heating of heat shrinkable tape: the pipe segment wrapped with the heat shrinkable tape is inserted into the infrared heating unit, and then the infrared heating unit is turned on to heat and temper the pipe segment wrapped with the heat shrinkable tape.

[0023] In summary, the technical effects that can be achieved by the present application are as follows:

[0024] The application provides a laboratory heat shrinkable tape installation system preparation device, the laboratory heat shrinkable tape installation system comprises a pipe section and a heat shrinkable tape wrapping the pipe section, and comprises a transfer assembly, a preheating assembly and a heating assembly; the transfer assembly is used for transferring the pipe section, and the preheating assembly is used for preheating the pipe section; the heating assembly comprises an infrared heating unit, the infrared heating unit is sleeved with the pipe section wrapped with the heat shrinkable tape, and is used for heating and tempering the heat shrinkable tape to manufacture the laboratory heat shrinkable tape installation system.

[0025] The laboratory heat shrinkable tape installation system preparation device provided by the application realizes control of heating and tempering of the heat shrinkable tape through the infrared heating unit, guarantees the temperature and time, controls the preheating temperature and time of the pipe section through the preheating assembly, and provides support for preheating, primer brushing and drying of the pipe section through the transfer assembly. The device adopts mechanical means to accurately control the preheating temperature, primer brushing time, drying time, heating and tempering temperature and time of the heat shrinkable tape installation, improves the quality and work efficiency of the installation system in the laboratory, provides support for mass production and high-quality preparation of the laboratory heat shrinkable tape installation system, and improves the service quality of laboratory detection. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0027] Figure 1 The structure schematic diagram of the laboratory heat shrinkable tape installation system preparation device provided by the embodiment of the application is shown in the figure.

[0028] Figure 2 The structure schematic diagram of the combination of the transfer assembly and the preheating assembly is shown in the figure.

[0029] Figure 3 The structure schematic diagram of the transfer assembly is shown in the figure.

[0030] Figure 4 The structure schematic diagram of the preheating assembly is shown in the figure.

[0031] Figure 5 The structure schematic diagram of the heating assembly is shown in the figure.

[0032] Icon: 100-transport assembly; 200-preheating assembly; 300-heating assembly; 110-frame; 120-castor; 111-first placing column; 112-pipe storage bin; 113-handle; 210-coil support; 220-preheating base; 211-mounting plate; 212-vertical plate; 221-limiting block; 222-guiding plate; 310-infrared heating unit; 320-heating base; 330-pushing device; 340-control valve; 321-second placing column; 331-telescopic pushing rod; 332-pushing block. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0035] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0036] Currently, the method of manually preparing and installing the system by using a torch is generally used when preparing a laboratory heat shrinkable tape installation system in a laboratory, and there are problems of low preparation efficiency, inability to accurately control the heating temperature, poor reproducibility, and unstable quality.

[0037] Therefore, the present application provides a laboratory heat shrinkable tape installation system preparation device. The laboratory heat shrinkable tape installation system includes a pipe segment and a heat shrinkable tape wrapping the pipe segment, and includes a transport assembly 100, a preheating assembly 200, and a heating assembly 300. The transport assembly 100 is used to transport the pipe segment, and the preheating assembly 200 is used to preheat the pipe segment. The heating assembly 300 includes an infrared heating unit 310, which is sleeved on the pipe segment wrapped with the heat shrinkable tape, and is used to heat and temper the heat shrinkable tape to prepare the laboratory heat shrinkable tape installation system.

[0038] The laboratory heat shrinkable tape installation system preparation device provided by the application realizes control of heating and tempering of the heat shrinkable tape, guarantees temperature and time, controls preheating temperature and time of the pipe section through the preheating assembly 200, and provides support for preheating, primer brushing and drying of the pipe section through the transfer assembly 100. The device adopts mechanical means to accurately control preheating temperature, primer brushing time, drying time, heating and tempering temperature and time of heat shrinkable tape installation, improves the quality and work efficiency of the installation system in the laboratory, provides support for large-batch and high-quality preparation of the laboratory heat shrinkable tape installation system, and improves the service quality of the laboratory detection.

[0039] The following will be described in detail Figures 1-5 The structure and shape of the laboratory heat shrinkable tape installation system preparation device provided by the embodiment will be described in detail:

[0040] In an optional solution of the embodiment, the transfer assembly 100 includes a frame 110 and casters 120, and the casters 120 are connected below the frame 110, as shown in Figure 2 Specifically, as shown in Figure 3 , the frame 110 is provided with a first placing column 111 extending in the horizontal direction and a pipe storage bin 112 arranged below the first placing column 111, the first placing column 111 can be inserted into the pipe section to carry the pipe section, and the pipe storage bin 112 is used for storing the pipe section; in addition, a handle 113 is arranged on the frame 110 for easy pushing.

[0041] In the embodiment, the transfer assembly 100 includes four rectangularly arranged casters 120, two of which are universal wheels and the other two are directional wheels, and the two universal wheels are close to the handle 113 for easy direction control. Further, to facilitate use, the casters 120 are all provided as brake casters to prevent displacement of the transfer assembly 100.

[0042] In an optional solution of the embodiment, the preheating assembly 200 includes a heating coil, a coil support 210 and a preheating base 220, the heating coil is wound around the coil support 210, and the coil support 210 is installed on the preheating base 220, as shown in Figure 2 Specifically, the heating coil is provided as a medium-frequency heating coil to ensure appropriate heating speed and temperature, facilitating temperature control. The coil support 210 includes a mounting plate 211 and a vertical plate 212, as shown in Figure 4 , the vertical plate 212 is vertically arranged and connected to the preheating base 220, and the two ends of the mounting plate 211 are respectively connected to the two vertical plates 212 and the mounting plates 211 are annularly and uniformly distributed. Specifically, recesses are formed on the mounting plate 211 along the length direction thereof for mounting the heating coil, so as to guarantee the pitch of the heating coil and ensure uniform heating.

[0043] In the embodiment, two heating coils are provided, and the two heating coils are coaxially arranged to ensure sufficient heating length. Correspondingly, the coil support 210 includes three vertical plates 212 and two sets of annularly distributed mounting plates 211.

[0044] In the embodiment, the preheating base 220 is composed of four rectangularly arranged vertical columns, a table top connected to the top ends of the vertical columns, and cross beams connecting the vertical columns, as shown in Figure 4 As shown, three cross beams are provided, and the three cross beams enclose a U-shaped space. Limiting blocks 221 are arranged between the two vertical columns without cross beams. That is, the preheating base 220 is provided with two sets of limiting blocks 221, and the two sets of limiting blocks 221 are arranged in the horizontal plane along the direction perpendicular to the axis of the heating coil. When the transfer assembly 100 enters the U-shaped space enclosed by the three cross beams, the two sets of limiting blocks 221 are located on both sides of the transfer assembly 100 to limit the transfer assembly 100, so as to ensure the relative position of the steel pipe on the transfer assembly 100 and the heating coil, and avoid that the axis of the steel pipe deviates from the axis of the heating coil too much, which causes uneven preheating. In the embodiment, the distance between the two sets of limiting blocks 221 is greater than or equal to the width of the vehicle frame 110.

[0045] In the embodiment, in order to ensure that the transfer assembly 100 smoothly enters the preheating assembly 200, the preheating base 220 is further provided with guide plates 222, as shown in Figure 4 As shown, the two guide plates 222 are symmetrically arranged and connected to the limiting blocks 221, respectively. The two guide plates 222 form an eight-shaped entrance to guide the transfer assembly 100 to enter, thereby improving the transfer efficiency.

[0046] In an optional scheme of the embodiment, the heating assembly 300 includes an infrared heating unit 310, a heating base 320, a push sampler 330, and a control valve 340, as shown in Figure 5 The infrared heating unit 310 is in a ring structure, and is coaxial with the pipe segment wrapped with the heat shrinkable tape during work, so as to ensure uniform heating. Specifically, the infrared heating unit 310 can be provided as an infrared radiator using electric heating.

[0047] In the embodiment, the heating base 320 is provided with second supporting columns 321, the second supporting columns 321 are inserted into the pipe segment wrapped with the heat shrinkable tape and bear the pipe segment wrapped with the heat shrinkable tape, so as to facilitate the heating of the infrared heating unit 310. The pipe segment wrapped with the heat shrinkable tape is suspended on the second supporting columns 321 by its own weight and remains stable. Specifically, the second supporting columns 321 are partially inserted into the infrared heating unit 310 to ensure that the pipe segment wrapped with the heat shrinkable tape is entirely located in the heating range of the infrared heating unit 310.

[0048] In this embodiment, the pusher 330 is used to push the heated laboratory heat shrinkable tape installation system out of the infrared heating unit 310 along the length direction of the second component column 321 to avoid the influence of residual heat. The pusher 330 includes a telescopic push rod 331 and a push block 332, the push block 332 is connected with the extension end of the telescopic push rod 331, the telescopic push rod 331 is extended to drive the push block 332 to move, and then the push block 332 pushes the laboratory heat shrinkable tape installation system out of the infrared heating unit 310. The control valve 340 is connected with the telescopic push rod 331, which is used to control the extension and retraction of the telescopic push rod 331. Specifically, the control valve 340 can be set as a hand valve or an electromagnetic valve, and the telescopic push rod 331 is set as a pneumatic cylinder. The telescopic push rod 331 can also be set as an electric push rod, but its action speed is slower than that of the pneumatic cylinder. Using the pusher 330 to push the laboratory heat shrinkable tape installation system can avoid the risk of burns caused by high temperature to the human body and the bruise injury caused by manual pushing with tools.

[0049] In addition, when using an electric push rod, two strokes can be set, one stroke is used to limit the pipe section covered with heat shrinkable tape, and the other stroke is used to push out the prepared laboratory heat shrinkable tape installation system. At the same time, two pushers 330 can also be set to set two strokes respectively, which are named as the first pusher and the second pusher. When the pipe section covered with heat shrinkable tape is loaded into the second component column 321, the first pusher is extended to limit, at this time, the pipe section covered with heat shrinkable tape abuts against the first pusher, and then the first pusher is retracted to avoid being heated by the infrared heating unit 310. When the prepared laboratory heat shrinkable tape installation system needs to be pushed out, the second pusher is extended.

[0050] In this embodiment, when the laboratory heat shrinkable tape installation system is pushed out, the transfer assembly 100 can be used for storage, that is, the first component column 111 and the second component column 321 are aligned, the laboratory heat shrinkable tape installation system slides into the first component column 111 from the second component column 321, and then the laboratory heat shrinkable tape installation system is taken away from the infrared heating unit 310 by the transfer assembly 100. At this time, the heating base 320 is provided with a corresponding opening for the frame 110 to enter, and a corresponding limiting block 221 and a guide plate are provided to ensure that the first component column 111 and the second component column 321 are aligned. In order to avoid the movement being blocked, chamfers or round corners are provided at the ends of the first component column 111 and the second component column 321 to make the pipe section pass through the splicing part of the first component column 111 and the second component column 321 smoothly.

[0051] Based on the laboratory heat shrinkable tape installation system preparation device provided in this embodiment, a laboratory heat shrinkable tape installation system preparation method is proposed, which uses the above laboratory heat shrinkable tape installation system preparation device, and includes the following steps:

[0052] Pipe segment preparation: the pre-sized pipe segments are sandblasted and placed in the transfer assembly 100. That is, the surface-treated pipe segments are placed in the pipe storage bin 112, and one pipe segment is placed on the first component column 111.

[0053] Pipe segment preheating: after the transfer assembly 100 is moved to the preheating assembly 200, the preheating assembly 200 heats the pipe segment, as shown in Figure 2 . At this time, the heating coil preheats the pipe segment on the first component column 111 at the required temperature and time.

[0054] Primer application: the transfer assembly 100 is moved so that the transfer assembly 100 carries the preheated pipe segment out of the preheating assembly 200, and then the preheated pipe segment is primed.

[0055] Hot shrink tape winding: after the primer dries, the hot shrink tape is wound around the pipe segment and fixed with a fixing piece.

[0056] Hot shrink tape heating: the pipe segment wrapped with the hot shrink tape is inserted into the infrared heating unit 310, and then the infrared heating unit 310 is turned on to heat and temper the pipe segment wrapped with the hot shrink tape according to the set temperature and time, thereby obtaining the laboratory hot shrink tape installation system.

[0057] Laboratory hot shrink tape installation system removal: the pusher 330 pushes the laboratory hot shrink tape installation system out of the infrared heating unit 310 to facilitate the preparation of the next piece.

[0058] In an alternative embodiment of the present embodiment, the laboratory hot shrink tape installation system preparation device can be provided with at least two transfer assemblies 100, one of which is used to store and preheat the pipe segment, apply primer, and wind the hot shrink tape, and the other of which is used to store the prepared laboratory hot shrink tape installation system and receive the laboratory hot shrink tape installation system pushed out by the pusher 330. In addition, the number of transfer assemblies 100 can be increased or decreased according to the process time to reduce the waiting time of the preheating assembly 200 and the heating assembly 300, thereby ensuring the preparation of the laboratory hot shrink tape installation system in large quantities and high efficiency. It should be noted that, due to the small size and volume of the parts, the handling process can rely on manual operation, which is more efficient; the pipe segment is located on the first component column 111 during preheating, primer application, and hot shrink tape winding, which facilitates operation and ensures processing quality; and the transfer assembly 100 can be stopped at the heating assembly 300 to wait for the prepared laboratory hot shrink tape installation system to be pushed out in time.

[0059] The laboratory heat shrinkable tape installation system preparation device provided by the embodiment solves the problems of low efficiency, inaccurate control of test parameters and unstable installation system quality caused by manual preparation of the laboratory heat shrinkable tape installation system, has great technical advantages in reducing labor cost, reducing operation difficulty and improving installation system quality. In addition, the laboratory heat shrinkable tape installation system preparation device provided by the embodiment can also be used for preparation of heat shrinkable sleeves.

[0060] Specifically, the laboratory heat shrinkable tape installation system preparation device provided by the embodiment can process multiple installation systems at the same time, has high preparation efficiency and reduces the influence of human factors on test results; the installation tempering method using medium-frequency preheating and infrared heating can reduce pollution, reduce energy consumption and improve the quality of the installation system; the caster 120 with a brake can ensure that the transfer assembly 100 remains stable during preheating and heating, ensuring the processing quality; the limiting block 221 is used to fix the position of the transfer assembly 100 during medium-frequency preheating, which can ensure the stability of the position of the pipe section during preheating and the controllability of the preheating temperature; the push sampler 330 can push the installation system out for cooling after the tempering time is reached, avoiding the influence of residual heat and ensuring the quality of the installation system, which provides a guarantee for the accuracy of subsequent experiments.

[0061] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A laboratory heat shrink tape installation system preparation device, the laboratory heat shrink tape installation system comprising a tube segment and a heat shrink tape that covers the tube segment, characterized by, The transport assembly (100), the preheating assembly (200) and the heating assembly (300) are included. The transport assembly (100) is used for transporting the pipe segment, and the preheating assembly (200) is used for preheating the pipe segment. The heating assembly (300) includes an infrared heating unit (310) which is sleeved on the pipe segment wrapped with the heat shrinkable tape and is used for heating and tempering the heat shrinkable tape to make the laboratory heat shrinkable tape installation system.

2. The lab heat shrink tape installation system preparation apparatus of claim 1, wherein, The transport assembly (100) includes a frame (110) provided with a first placing column (111) extending in the horizontal direction, and the first placing column (111) is inserted into the pipe segment to carry the pipe segment.

3. The lab heat shrink tape installation system preparation apparatus of claim 2, wherein, The frame (110) is provided with a pipe storage bin (112) for storing the pipe segment.

4. The lab heat shrink tape installation system preparation apparatus of claim 3, wherein, The transport assembly (100) further includes casters (120) connected to the lower portion of the frame (110).

5. The lab heat shrink tape installation system preparation apparatus of claim 1, wherein, The preheating assembly (200) includes a heating coil and a coil support (210), and the heating coil is wound on the coil support (210).

6. The lab heat shrink tape installation system preparation apparatus of claim 5, wherein, The preheating assembly (200) further includes a preheating base (220), and the coil support (210) is installed on the preheating base (220). The preheating base (220) is provided with limiting blocks (221), and two groups of the limiting blocks (221) are arranged in the horizontal plane in the direction perpendicular to the axis of the heating coil, and the two groups of the limiting blocks (221) are located on both sides of the transport assembly (100).

7. The lab heat shrink tape installation system preparation apparatus of claim 1, wherein, The heating assembly (300) further includes a heating base (320) provided with a second placing column (321), and the second placing column (321) is inserted into the pipe segment wrapped with the heat shrinkable tape to carry the pipe segment wrapped with the heat shrinkable tape.

8. The lab heat shrink tape installation system preparation apparatus of claim 7, wherein, The heating assembly (300) further includes a push sampler (330) including a telescopic push rod (331) and a push block (332), the push block (332) is connected with the extending end of the telescopic push rod (331), the telescopic push rod (331) is extended to drive the push block (332) to move, and then the push block (332) pushes the laboratory heat shrinkable tape installation system out of the infrared heating unit (310).

9. The lab heat shrink tape installation system preparation apparatus of claim 8, wherein, The heating assembly (300) further includes a control valve (340) connected with the telescopic push rod (331) for controlling the extension and retraction of the telescopic push rod (331).

10. A method for producing a laboratory heat shrinkable tape mounting system using the laboratory heat shrinkable tape mounting system production apparatus according to any one of claims 1 to 9, characterized by, The method includes the following steps: Preparation of the pipe segment: the prefabricated pipe segment is sandblasted and rusted, and then is loaded into the transport assembly (100); Preheating of the pipe segment: after the transport assembly (100) is moved to the preheating assembly (200), the preheating assembly (200) heats the pipe segment; Primer brushing: the transport assembly (100) is moved to move the transport assembly (100) carrying the pipe segment out of the preheating assembly (200), and then primer brushing is performed; Winding of the heat shrinkable tape: after the primer is dried, the heat shrinkable tape is wound on the pipe segment, and the heat shrinkable tape is fixed by the fixing sheet; Hot shrink tape heating: insert the pipe section with the wrapped hot shrink tape into the infrared heating unit (310), and then turn on the infrared heating unit (310) to heat and temper the pipe section with the wrapped hot shrink tape.

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