JPH04503936A - Flexible double containment piping system for underground storage tanks - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Flexible for underground storage tanks Double containment piping system Technical field The present invention provides an improved underground tank for storing hydrocarbon fuels, etc. Regarding underground piping systems.

Background technology As a result of a study conducted by the American Environmental Protection Agency, approximately two-thirds of underground storage tank leaks are caused by It was determined that the problem was caused by a break in the underground piping system, rather than by the problem itself. concrete Unions, elbows, and fittings that connect two straight sections of pipe to each other. connections, connections with underground equipment, and corroded steel pipes.

Also, due to high groundwater table or movement of the ground on which the tank is installed, Structures within the pipe system may be damaged. This can be caused by cracks or the entire structure. This is especially true in the case of rigid fiberglass, which is subject to physical damage.

Disclosure of invention The present invention provides a pump outlet bottle that is preferably located on top of an underground fluid storage tank. flow from the port to the inlet boat of a fluid distribution system, such as those used in gas stations. It provides a piping system for transporting the body.

The present invention is a double-walled flexible piping system particularly suitable for underground tanks storing hydrocarbon fuels. system.

The purpose of this invention is to ensure that hazardous fluids such as hydrocarbons are stored in underground storage tank piping systems. The aim is to prevent or reduce the accidental leakage of substances into the environment.

Overall, the system consists of a primary body made of flexible material having an inlet end and an outlet end. a tube, a secondary tube of flexible material substantially surrounding the secondary tube, and an outlet port of the pump. Pump fittings removably connected to the pump fittings and removably connected to the inlet boat of the fluid distribution device a joined distributor fitting, and two second fittings. second pong The pump fitting removably fixes the pump end of the secondary pipe to the outer piping adapter of the pump fitting. do. The second distributor fitting connects the distributor end of the secondary pipe to the outside of the distributor fitting. Detachably fixed to the pipe adapter.

The pump arm has an inner tube communicating with the outlet port of the pump and an outer tube concentric with the inner tube. Equipped with a side piping adapter. The distributor fitting connects the fluid distributor inlet port and It includes a communicating inner tube and an outer piping adapter concentric with the inner tube. −Next The inlet end of the tube is removably secured to the inlet tube of the pump fitting, while the outlet end of the tube is separated. It is removably fixed to the inner pipe of the distribution device joint.

The second bomb-body fitting is adapted to engage the outer piping adapter of the pump fitting. a first male fitting adapted to mate with the distributor end of the secondary tube; Equipped with a male fitting.

According to the present invention, the secondary pipe, the secondary pipe, the bomb one-body joint, and the second pump one-body joint , the annular volume defined by the distributor fitting and the second distributor fitting is - It acts to contain the fluid in the event of a leak.

The primary advantage of the present invention is that the containment chamber, dispensing device or manifold pan; If provided, the tank can be removed by simply working in the connecting pan, optionally. Installation does not require excavating or digging up the ground at the site (piping cannot be replaced). This is the point.

A further advantage is that the tank can be installed without excavating or digging up the ground at the site. The piping is easily accessible from the ground for testing the structure.

An advantage of some embodiments of the invention is that a simple underground piping system requires only two connecting fittings. The point is that it can be connected.

Another embodiment of the invention provides for additional fittings such as for example that the piping can form an rYJ fitting. including using. A means is provided for confining the fluid within the containment volume.

A feature of the present invention is that when a pipe leakage occurs, the leakage substantially completely contained within the pace or tube containment chamber and exposed to the surrounding environment. The goal is to prevent it from being discharged.

A further feature of preferred embodiments of the invention is that the cell is located between the walls of two concentric tubes. The sensor provides a way to detect a leak from the primary pipe, e.g. to sound an alarm. Is Rukoto.

A further feature of the preferred embodiment is that - from the secondary tube to the annular space between the primary tube and the secondary tube; Any leakage into the environment can be evacuated into a containment chamber that contaminates the environment. It can be removed without staining.

A further feature of another embodiment is to prevent leakage into the annular space between the secondary tube and the secondary tube. Removed by suction at the connection point of the above-ground distribution device, without polluting the environment. This means that it can be easily removed.

Another embodiment of the invention provides a collection pump in which fluid from a containment area is continuously drained. It is intended to provide a

An embodiment of the invention which allows a particularly advantageous assembly and disassembly is: It involves cooperation between an ionet type quick release joint and a bellows. The base Rose retracts to access quick-removal fitting to allow inner tube replacement It is something. The bellows, when retracted, seals the containment piping concentrically with the secondary pipe. Sealably connected to provide an annular containment volume around the quick release fitting.

Brief description of the drawing FIG. 1 shows an installation of an underground fuel storage tank equipped with a piping system according to the invention. Elevation section of Figure 2 shows the piping system of Figure 1, which shows the connection between the flexible tube and the pump body in more detail. Elevated cross-sectional view of part of the stem, 3 is a cross-sectional view taken along line 3-3 of FIG. 2; FIG. 4 is a cross-sectional view of the flexible tube and fuel distribution system; 1 is an elevational sectional view of a portion of the piping system in FIG. 1 showing further details of the connection state with the Figure 5 shows connections between flexible piping/manifolds and other underground storage tank systems. Schematic elevation of the minute; 6 and 7 each show in more detail some of the components schematically shown in FIG. 5. Elevation sectional view, Figure 8 shows in detail the connection between the flexible tube and the pump body, which roughly corresponds to Figure 2. FIG. 9 is an elevational view, partially in section, of one end of another embodiment of the present invention. A partial cutaway of the other end of the alternative embodiment shown in FIG. 8 showing details of the connection with the distribution device. Figure 10 shows the arrangement approximately as shown in Figure 9, but with a non-connected configuration. Perspective view of the quick release coupling used in the embodiment shown in FIGS. 8 and 9 in the configuration shown in FIG. FIG. 11 shows an embodiment of the invention employing a connecting chamber between the tank and the dispensing device. Elevation of the example; Figure 12 adopts the connection chamber shown in Figure 11, but each underground tank is connected FIG. 13 is an elevational view of an embodiment of the invention connected to a pair of dispensing devices via a chamber; The figure is an elevational view showing further details of one embodiment of the invention employing a connection chamber; Containment pipes drain into containment chambers and connection chambers that vent to atmosphere. Elevation showing, Figure 14 shows Figure 8 where the gap space between the product pipe and the containment pipe maintains a vacuum. and the elevational view of FIG. 13, No. 1, showing an alternative embodiment such as that shown in FIG. Figure 5 shows that the interstitial space is evacuated to the tank through piping within the containment chamber, and this The elevation views in Figures 13 and 14 and Figure 16 show a pair of an elevation view showing more detail of the piping of the manifold containment pan above the equipment group; Figure 17 shows that the containment chamber, connection chamber and manifold pan are each exposed to gravity. The first example shows another embodiment of the present invention, which is connected via piping to a collection reservoir supplied by 1 elevation view, FIG. 18 is an elevation view of FIG. 12 of the embodiment shown in FIG. 17.

Examples of the invention Figure 1 shows access to pump 37 and underground piping 19.22 connected to the pump. A single unit at ground level 28 with a conventional containment chamber 12 for 1 shows a conventional underground fuel tank 13 with a walkway 14; The underground tank 13 is By opening the passenger passage 14 and transporting fuel to the tank 13 through the filling pipe 16, is filled with fuel.

Fuel is transferred from the underground tank 13 through the inlet pipe 83 through the primary pipe 22 to the fuel distribution system. A pump 37 is provided for pumping the fuel to the hand 39 and providing input to the fuel distribution system 35. Ru. The fuel distribution device 35 can be a conventional gas pump at a gas station. Ru. According to the invention, the secondary pipe 19 covers the fire pipe 22 and prevents leakage from the fire pipe 22. contain the fuel that is

To enter the containment chamber 12, the manhole cover 14 must be removed and the base exposing the gas recovery pipe 11 and the filling pipe 16, which are then removed from ground level 28. You can.

As shown in FIG. 2, the compression fittings 17.18 for the secondary pipe 19 and the fire pipe 22 are , which makes it accessible from the containment chamber 12. Pressure for secondary pipe 19 Remove the compression fitting 17, then attach the male threaded joint 20 to the female tap piping adapter 15. Remove the male fitting 20 from the pump body and adapter, and This exposes the compression fitting 18 connecting the inner tube 12 to the adapter 23.

The compression fitting 18 can now be removed; - the fire tube 22 and the secondary tube 1; 9 can be removed from the piping adapter and pump body 37. Similarly, -fire The other ends of the pipe 22 and the secondary pipe 19 are removed from the distributor fitting 39 at the road surface level 28. remove.

The inner fire pipe 22 is now "raised" from the ground level 28 to the outside of the outer secondary pipe 19. ” or can be pulled upwards. - Fire tube 22 and secondary tube 19 are sealed At each end below ground level at the interconnection surface with the chamber 12, and at the fuel distribution device. Access is possible at both ends of the joint 39 at road level 28. tube 19 ．． 22 is flexible, so the pipe is transported to the site where the tank is installed and installed at the site. It can be cut to the desired length.

The piping adapter 23 has an outer diameter of 50.8 m and is connected to the outlet pump body 12 underground. This is a custom made forged or cast fitting with an internal diameter of 2 inches. distribution The device coupling 39 is connected to the distribution device inlet boat and extends from the conventional through-hole Arai. This is the corresponding fitting. The inner diameter is preferably 50.83 mm (2 inches). A new flexible fire tube 22 fits onto the plumbing adapter 23. Compression fitting 18 is one fire Tighten the pipe 22 and securely fix it to the piping adapter 23. Inside the piping adapter 23 The length of the side tube is typically the diameter of the two tubes. Instead of the compression fitting 18, a general Additional hose clamps, straps or other connections may also be used.

The male fitting 20 is a steel tube with an outer diameter of 101.6 mm (4 inches) and a male thread. Ru. The fitting threads onto the outer plumbing adapter 15 at one threaded end 25. flexibility The secondary pipe 19 is preferably a hose pipe with an inner diameter of 101.6 mm (4 inches). Yes. The protection tube slides over the free end of the male fitting 20. The compression fitting 17 is the secondary pipe 19 Tighten and securely secure it to the male joint 20.

After the installation of the flexible piping system, the outer secondary pipe 19 will be buried underground. It is considered flexible. The outer tube 19 functions as a guide for the fire tube 22 and has a sliding can then enter the fire tube 22 or retreat from the fire tube.

The piping adapter 23 has a male thread 25 that screws into the pump body 37 (pump has a standard male fitting, a standard fitting for connecting the pipe adapter. hands are required). Screw the piping adapter 23 into the outlet boat of the pump body 37. At this time, the piping adapter 23 is fixed and generally cannot be removed.

The entrance of the secondary pipe 19 where the secondary pipe 19 enters the containment chamber 12 is By connecting to the sleeve 21, which is an integral part of the bar 12, the protective cover 24 can be Use and seal.

If the inner fire tube 22 leaks, such leakage will occur between the primary fire tube 22 and the secondary tube 19. Contained within the annular space 27, leaking into the containment chamber 12 and - It will not leak out. Connection between tube 22 and pump body 30 or two compression connections If a leak occurs in any of the components or 18, the presence of the protective cover 24 will prevent the leak from being contained It is contained within the containment chamber 12 and does not overflow into the surrounding soil. Applicable The protective cover 24 also prevents leakage from the fill tube 16 from leaking from the containment chamber 12 into the soil. prevent the

The annular space 27 between the coaxial primary tube 22 and the secondary tube 19 By placing one or more sensors 29 in the annular space 27 between , the inner tube 19 can be tested for leakage.

A manifold connection 67 is optionally provided as shown in FIG. (not shown). The connector connects to the manifold through the fitting. An inner-fire tube coaxially surrounded by a secondary containment tube 79 extending from the continuation section 67 82. The above fitting connects the pump 67 and the pipe that extends to the distribution device 35. 19.22.

Installation is the method To install the system shown in FIG. is installed in the basement, and then the flexible inner fire tube 22 is installed in front of it from ground level 28. Insert it into the row-side pipe 19 installed in the column. Ends below ground of two concentric tubes 19.22 The containment area is accessible by removing the manhole cover 14. Mechanically connected within chamber 12 . Ends above ground of two concentric tubes 19.22 is mechanically connected to the inside of containment pan 138 below fuel distribution system 35. It will be done.

Therefore, in the pipe there are connections in the containment chamber 1.2 and in the containment pan. There are only two mechanical connections, the connection at 138. According to the present invention For example, there is a possibility of leakage from underground pipes, and it is impossible to visually inspect from above ground. The presence of mechanical pipe connections that cannot be made is minimized.

It employs many underground connections and replaces traditional plumbing that is buried and inaccessible. It is necessary to compare with the system.

To reach these connections, many piping systems must be excavated and tested for leaks. I have to put it out.

Furthermore, if a leak occurs at the connection between the underground pipe 22 and the containment chamber 12; , the fitting 18 snaps open and replaces the inner tube 22 with a condenser at ground level 28. New underground pipes can be used without disturbing the cleat slab. . In this way, underground piping can be replaced without going underground.

In FIG. 2, if a leak occurs in the fire tube 22, the liquid is contained in the secondary tube state is maintained. FIG. 4 shows the pumping of the primary tube 122 and secondary tube 119 at one end. adapter 125 at the other end within the underground storage tank distribution equipment piping system 100. A similar gas distribution station with another embodiment that secures to the distributor fitting 139 of The lines are shown schematically.

As shown in FIG. 4, the fluid 150 leaking from the distribution device 135 is 28 and drips downward into a containment pan 138 where it collects at the bottom thereof; - an annular space 127 between the secondary or product tube 122 and the secondary or containment tube 119; from the space to the bottom 126 of the containment chamber 112 by gravity. be discharged.

Leakage from primary tube 122 similarly flows into secondary tube 119 and into containment chamber 11. Move to the bottom 126 of 2.

A fitting that secures the primary tube 122 to the secondary tube 119 at the bottom of the distribution device 135.135 is connected to the bottom of the distributor fitting 139, which conventionally has a threaded opening. This succession The hand is generally similar to the fitting at the other end of the dual piping system within containment chamber 112. Ru. This secondary or containment tube 119 projects from containment pan 138 at one end. while directly connected at the other end to a sleeve protruding from the containment chamber 112. . This connection method can be applied in the field with strap tightening and clamping tools. A stainless steel strap or band 157 can be used. Apart from this In the embodiments shown in FIGS. 2 and 4, the monitoring device 129 is connected to a leak collection channel. installed in the chamber 36 or 136 without undesirable release of fluid into the environment. , can make any necessary repairs. In both of the embodiments described above: - the fire tube 22 or 1; 22 can be replaced from the ground.

of the primary tube 22 or 122 and the secondary tube 19.119 in the two embodiments described above. The material is similar to traditional "hose" construction, i.e. suitable for gasoline use. Reinforced rubber or plastic material.

While the gasoline supply hose has a short life on the ground, the 1st rI! J, Figures 2 and 2 As shown in Figure 4, underground in the dark (i.e., out of bright sunlight) and stationary. When used under conditions, its lifespan is significantly longer. In such cases, exposure to sunlight There is no deterioration of the pipe material due to the pipe material being removed, and the pipe material is not deteriorated due to the frequent movement of conventional above-ground pipes. There is no deterioration of the tubing material due to wear and tension. Under such circumstances, Figure 1 , the expected service life of the underground piping system shown in Figures 2 and 4 is similar to that of the conventional above-ground piping system. The average expected lifespan of a stem is about 4 years, while it can last more than 10 years.

Furthermore, in the case of very long pipes between the fuel storage tank and the fuel supply system, repeater seals are required. A containment chamber 312 can be placed in the piping. placement containment chamber 212, - primary and secondary piping system 222.219, and fuel distribution device 235 It is shown schematically in FIG. Length of the primary and secondary piping system delivered to the work site If the distance is shorter than the distance between piping containment chamber 312 and fuel distribution device 235, or multiple fuel storage tanks, requiring the use of interconnects in the piping. If necessary, a repeater containment chamber must be required.

As shown in Figure 5, an inlet extending downwardly toward the bottom of the storage tank (not shown) Pump 337 with mouth tube 383 is within underground containment chamber 312 . -fire Tube 382 extends from containment chamber 312 toward dispensing device 235 . deer However, the chain pipe is not long enough to extend to the distribution device 235 and the fitting 3 in the pipe There is a termination at 84. The inner pipe joint 384 communicates with the first fire pipe 382 at one side. , communicates with another fire tube 222 on the opposite side, and connects these to provide continuous fluid flow. form a passage. Clamp 357 secures tube 382.222 to fitting 384.

Leakage from any connection between the pipe fitting and pipe 382 or pipe 222 is contained. It is held within chamber 212.

If tube 382 leaks and requires replacement, the pump 337 and distributor 235 It is possible to do this without replacing the entire piping between, and therefore the tube 222.

Example of bellows 8, 9, 14 and 16 allow particularly advantageous assembly and disassembly. 2 shows another embodiment of the present invention. In this embodiment, - the fire tube 522 is The bayonet type quick disconnect fitting 575 shown in more detail in Figure 10 Connected to stationary components such as bomb 537. The secondary piping is a pair of bellows e.g. polypropylene or other plastic material held in place by lamp 557. It is secured to the stationary component by a bellows 590 of tick or metal.

If either clamp 557 is loosened, the bellows 590 will be retracted and quick removal will occur. access to the fitting 575.

As shown in FIG. and can be coupled to fluid distribution device 535. The base of the connector 575 is a square block. Communication with conventional gasoline distribution device Senai 510 attached to racket 511 The elbow adapter 524 is fixed to the elbow adapter 524.

As shown in FIG. 10, the quick attachment fitting 575 has a nozzle portion 575a, A base portion 575b. The base portion 575b is connected to an aperture that communicates with the pump 537. It is desirable to have a threaded neck 576 that engages the adapter 523. Noz The tube portion 575a is adapted to be inserted into the fire tube 522 and clamped by the clamp 558. It is desirable to have a male portion 577 that can be secured to the fire tube. child By rotating these portions 575a and 575b in the direction shown by arrow 601, They are designed to be interlockable in a bayonet style. These parts are in opposite directions by rotating the parts 575a, 575b to free and separate them. It can be removed.

manifold system FIGS. 11, 12 and 16 show further details of the system shown in FIG. 5 as a whole. An example of improvement is shown. This means that several sets of distribution devices 635 are each installed. This is useful for a gas station having a plurality of concrete groups 785.

“In this embodiment, the tank 713, which is preferably of double wall structure, It has a containment chamber 712 at the top of the manway 762, with a fill tube 711 and pump A pool inlet tube 783 extends through the chamber. The pump 737 is a fire tube 782 The chain is connected to the chain via coupling means 718, which may be of any type described above. It communicates with the pump. A secondary containment tube 779 surrounds the fire tube 782. these Tubes 779, 782 extend to connection chamber 612. - Passes through to fire tube 782. from the connection chamber 612 to the lower part of the set of distribution devices 635 to the manifold. It communicates with the fire tube 622 which extends to the pan 638. Also, manifold pan 638 A secondary pipe 619, which extends up to 100 m, surrounds the fire pipe 622.

As shown in FIG. 12, coupling means 784 can include a T-fitting, which As a result, the pipes 619a and 619b are connected to the top of the concrete group 785 as before. and extends to a manifold pan 638 installed in the manifold pan 638.

FIG. 16 shows a portion of the system of FIG. 12 in more detail. The figure also shows different types of bread. position 660, and any interconnections 650 that may be employed if necessary. It shows another passage for.

As shown in FIG. Similarly, the secondary pipe 619 extends from the connecting channel 612 to the manifold. Tilt upward to hold pan 638. Within connection chamber 612, fitting 784 The upper end 728 of the tube 779 is located below the lower end 730 of the tube 619, and All leakage into the secondary pipe is discharged.

As shown in more detail in FIG. 16, a manifold containment pan 638 is provided for each set of products. Preferably, it is located below the distribution device. These are the distribution of each product on group 785. provides a means for interconnecting devices. using adapter plate (not shown) , a product dispensing device is mounted on containment pan 638. A wide variety of product dispensing equipment are available and in use, standard dimensions for mounting on the group and no shape. To ensure sufficient space for on-site maintenance, Attach each type of distribution device to the top of the group using the appropriate adapter plate.

Connections between pans 638 may be made by canopy footings or by canopy footings for new facilities. When converting existing equipment, it can be done using rUJ-shaped piping 650.

Separately, the manifold pan is equipped with a gasketed cup to keep rainwater out. and can be placed at locations along group 785, such as location 660.

Figure 13 shows an example of the system shown in Figures 11 and 12. , in this case the annular space between containment tube 779 and product tube 782 is It communicates with the environment within chamber 712 and connection chamber 612 . In this example In this case, a quick release fitting 775 of the type described above is used without a bellows.

Hole 750a allows leakage fluid filling containment tube 779 to drain into connection chamber 612. hole 750b allows such fluid to flow into containment chamber 712. Allow to drain downward.

liquid-responsive and connected to the product supply pump alarm (not shown) or control device. Leakage can be monitored by monitors 766 and 767.

Another embodiment is shown in FIG. 14, in which a product tube 782 and a containment tube 779 The interstitial space 827 is partially maintained in a vacuum state. As a result of releasing fluid, the The vacuum within interstitial space 827 is lost. As a result, the vacuum switch 873 causes an alarm. Activate the device to generate sound and/or stop the product feed pump.

Bellows 890, generally described above, is connected to component 875a within containment chamber 712. , 875b. Also, in the connection chamber 612 The corresponding joint 876 is surrounded by a bellows 891. Each bellows It communicates with adapter fitting 823 or 824, respectively, in the manner described above. plumbing When installing, apply a vacuum to the gap space 827 using a conventional vacuum pump, As a result, containment tube 779 is sealed.

FIG. 15 shows a system for discharging vapor from containment chamber 812 to tank 713. An embodiment is shown in which means are provided for this purpose. Vases released from gasoline during dispensing vapor is created in the tank by dispensing gasoline or by forced suction. suction into the bulk storage tank 713 through the interstitial space 927 due to the displacement caused by the Been back.

A joint 994 communicating with the gap space 927 is provided. The wall of joint 994 is A orifice 995 is formed and the collected vapor or leaked fluid passes through the orifice. into double elbow 996 and directs the containment chamber toward tank 713. orifice 9 extending from bar 812 in the direction indicated by arrow 998 to manway 714; It has reached 97.

liquid collection reservoir FIGS. 18 and 19 show an example of the system shown in FIGS. 11 and 12. is illustrated, where the drain pipe 810 is slanted downward toward a collection reservoir 850. 712 extending from each containment chamber 712. This allows the entire system to be A single location is provided for removing product or water. The liquid collecting reservoir 850 has a smaller diameter. Containment area 712.612,6 by double containment biaxial flexible piping 38.

In this manner, the drain tubes 820 extend downwardly from each connection chamber 612 to the collection sump 850. Tilting and elongating. Similarly, each manifold pan 638 has a collection of exhaust pipes 830. It extends to a liquid reservoir 850. Due to the presence of drain pipes and collection reservoirs, each chamber and There is no fluid to accumulate and therefore any overflows or leaks in the system are eliminated. Leakage can be collected in a collection sump.

It is clear that the objects of the invention are achieved by the above disclosure. However, the basis It should be understood that many variations on the present invention are possible, some of which are described above. As stated above. The above and its variations are within the spirit and scope of the above invention. These should be construed with reference to the following claims.

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Claims (8)

[Claims] 1. A piping system that conveys fluid from the outlet port of a pump to the inlet port of a fluid distribution device. and then a. A pump fitting removably coupled to an outlet port of a pump, the pump fitting being removably coupled to an outlet port of the pump; an inner tube communicating with the outlet port and an outer piping adapter concentric with the inner tube. pump fitting, b. A distributor coupling removably coupled to an inlet port of a fluid distributor, the coupling comprising: an inner tube communicating with the inlet port of the fluid distribution device and an outer tube concentric with said inner tube. a distributor fitting comprising an adapter; c. A primary tube of flexible material having an inlet end and an outlet end, the inlet end is removably secured to the inner tube of the pump fitting, and said outlet end is connected to the inner tube of the distributor fitting. a primary tube removably secured to the tube; d. Consists of a flexible material that substantially surrounds the primary tube. a secondary pipe having a pump end and a distributor end; e. A second pipe removably secures the pump end of the secondary pipe to the pump's outer piping adapter. A pump fitting adapted to fit an outer piping adapter of the pump fitting. a second end having a first end and a second end adaptable to the pump end of the second tube; pump fitting and f. Removably secure the distributor end of the secondary pipe to the outer piping adapter of the distributor fitting. a second distributor fitting that is compatible with an outer piping adapter of the distributor fitting; a first end adapted to accommodate the distributor end of the secondary tube; and a second end adapted to accommodate the distributor end of the secondary tube. a second distributor fitting comprising; g. A containment chamber removably formed around the pump, the containment chamber being removably formed around the pump. Contains a mechanical connection of the primary tube to the outlet section, thereby allowing the primary tube to Secondary pipe, pump fitting, second pump fitting, distributor fitting and second distributor fitting The patchy volume defined by the a containment chamber adapted to provide means for tube system. 2. A continuous flexible piping system according to claim 1, comprising a primary pipe or leakage fluid at the pump end or distributor end into a containment chamber connected to the piping. A piping system characterized in that it can be discharged into a tank. 3. A continuous flexible piping system according to claim 1, comprising: leakage to a sensor placed within the annular space defined by the primary and secondary pipes. A piping system characterized by being made more detectable. 4. A continuous flexible piping system according to claim 1, comprising: leakage can be removed by suction at the above-ground distribution device connection. A piping system characterized by: 5. A continuous flexible piping system as claimed in claim 1, comprising: Leaking fluid or fittings at the pump end or distributor end may cause tank distributor installations. existing equipment through the containment chamber without excavation or excavation at the site. A piping system characterized in that it can be attached to. 6. A continuous flexible piping system according to claim 1, wherein the secondary pipe is into a sleeve projecting from the containment van at one end and into a containment chamber at the other end. A piping system characterized by a direct connection. 7. A continuous flexible piping system according to claim 2, comprising a pump coupling. A piping system further comprising a connecting chamber intermediate the and the distributor fitting. Tem. 8. A continuous flexible piping system according to claim 7, comprising: a collection basin; and means for conveying overflow fluid from the containment chamber to a collection basin. and piping systems.