Fire extinguishing system

Patent metadata

Field	Value
Publication number	US-9962569-B2
Application number	US-201314376347-A
Country	US
Kind code	B2
Filing date	Jan 25, 2013
Priority date	Feb 5, 2012
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A fire extinguishing system including a fluid source, at least one sprinkler ( 2 ), and distribution pipes ( 3 ). The distribution pipes ( 3 ) are formed at least partially as soft-steel metal pipe having a friction loss defined according to the Hazen-Williams formula (1), with P=6.05•10 5 •L•Q 1.85 •C (−1.85) •d (−4.87) , in which P=pressure drop in the pipeline, in bar, Q=flow rate through the pipeline, in l/min, d=average inside diameter of the pipe, in mm, C=constant for the type and condition of the pipeline, and L=equivalent length of pipe sections and pipe fittings, in m. The distribution pipes ( 3 ) have an anti-corrosion coating on the inside in order to ensure a value for C in a range of 125 to 150 during commissioning of the fire extinguishing system.

First claim

The invention claimed is:

1. A fire extinguishing system for distributing an extinguishing medium, at least comprising:
means for providing the extinguishing medium,
at least one means for applying the extinguishing medium,
transport means for connecting the means for providing the extinguishing medium to the at least one means for applying the extinguishing medium,
wherein the transport means are at least partially in the form of a plurality of mild steel metal pipes connected together by a plurality of coupling connections, wherein the pipe friction loss in each of the plurality of mild steel metal pipes is defined in accordance with the Hazen-Williams formula with
P =6.05•10 5 •L•Q 1.85 •C (−1.85) •d (−4.87)

wherein:
P=pressure drop in each of the plurality of mild steel metal pipes, in bars,
Q=through-flow rate through each of the plurality of mild steel metal pipes, in l/min, d=mean inside diameter of each of the plurality of mild steel metal pipes, in mm,
C=constant for type and condition of each of the plurality of mild steel metal pipes, and
L=equivalent length of each of the plurality of mild steel metal pipes and shaped portions, in m, wherein;
each of the plurality of mild steel metal pipes has an at least inwardly disposed corrosion protection coating,
the inwardly disposed corrosion protection coating is adapted to ensure a value for C in a range of 125 to 150 when the fire extinguishing system is commissioned for use, and
the inwardly disposed coating comprises an even and non-porous polymer layer containing iron and epoxy-acrylic, the even and non-porous layer being ionically bonded to at least an inner surface of each of the plurality of mild steel metal pipes and having a thickness in a range of 15-28 μm;
and wherein each of the plurality of mild steel metal pipes has a nominal width in a range of DN 32 to DN 250.

2. A fire extinguishing system according to claim 1 , wherein the even and non-porous polymer layer provides a value for C in a range of 125 to 150 within a period of use of 5 years.

3. A fire extinguishing system according to claim 1 , wherein the even and non-porous polymer layer provides a value for C in a range of 135 to 150 upon commissioning of the fire extinguishing system.

4. A fire extinguishing system according to claim 1 , wherein the even and non-porous polymer layer provides a value for C in a range of 135 to 150 within a period of use of 5 years.

5. A fire extinguishing system according to claim 1 , wherein each of the plurality of mild steel metal pipes for forming the transport means has a nominal width in a range of DN 32 to DN 65.

6. A fire extinguishing system according to claim 1 , wherein each of the plurality of mild steel metal pipes for forming the transport means has a wall thickness in a range of 2.0 mm to 2.5 mm.

7. A fire extinguishing system according to claim 1 , wherein the extinguishing medium is a medium selected from the list including: water, foam, water-foam mixture, gas, chemical extinguishing agents.

8. A fire extinguishing system according to claim 1 , wherein the means for providing the extinguishing medium include at least one storage component for the extinguishing medium, wherein the at least one storage component is selected from the list including: open reservoir, high-level tank, intermediate tank and other supply container.

9. A fire extinguishing system according to claim 8 , wherein the at least one storage component selected from the list including: high-level tank, intermediate tank and other supply container, has an inwardly disposed corrosion protection coating of concrete and/or plastic.

10. A fire extinguishing system according to claim 1 , wherein the means for providing the extinguishing medium, selected from the list including: water and water-foam mixture, is from a single water supply.

11. A fire extinguishing system according to claim 1 , wherein the means for providing the extinguishing medium, selected from the list including: water and water-foam mixture, is from a double water supply.

12. A fire extinguishing system according to claim 1 , wherein frost protection agent is added to the extinguishing medium selected from the list including: water and water-foam mixture.

13. A fire extinguishing system according to claim 1 , wherein the plurality of coupling connections comprise a plurality of threaded coupling connections.

14. A fire extinguishing system for distributing an extinguishing medium, the system comprising a plurality of corrosion resistant pipes that maintain a C value in a range of 125-150 for at least a year after being commissioned for use, each of the plurality of corrosion resistant pipes comprising a mild steel pipe with an even and non-porous layer ionically bonded to at least an interior surface of the mild steel pipe, the even and non-porous layer containing iron and epoxy-acrylic, and having a thickness in a range of 15-28 μm; and wherein each mild steel metal pipe has a nominal width in a range of DN 32 to DN 250.

15. The fire extinguishing system for distributing an extinguishing medium of claim 14 , wherein the mild steel pipe comprises a nominal width in a range of DN 32 to DN 65.

16. The fire extinguishing system for distributing an extinguishing medium of claim 15 , wherein the mild steel metal pipe comprises a wall thickness in a range of 2.0 mm to 2.5 mm.

17. The fire extinguishing system for distributing an extinguishing medium of claim 16 , wherein the even and non-porous layer containing iron and epoxy-acrylic is bonded to an exterior surface of the mild steel pipe.

18. The fire extinguishing system for distributing an extinguishing medium of claim 15 , wherein the even and non-porous layer has a thickness in a range of 21-27 μm.

19. A method of providing a fire extinguishing system for distributing an extinguishing medium, the method comprising:
obtaining a plurality of corrosion resistant pipes having a C value in a range of 125-150, each of the plurality of corrosion resistant pipes comprising a mild steel pipe with an even and non-porous layer ionically bonded to at least an interior surface of the mild steel pipe, the even and non-porous layer containing iron and epoxy-acrylic, and having a thickness in the range of 15-28 μm; wherein the mild steel pipe comprises a nominal width in a range of DN 32 to DN 250; and
providing the plurality of corrosion resistant pipes having a C value in the range of 125-150 for use as a transport means in a fire extinguishing system.

20. The method of providing a fire extinguishing system for distributing an extinguishing medium of claim 19 , wherein the mild steel pipe comprises a nominal width in a range of DN 32 to DN 65.

21. The method of providing a fire extinguishing system for distributing an extinguishing medium of claim 20 , wherein the mild steel pipe comprises a wall thickness in a range of 2.0 mm to 2.5 mm.

22. The method of providing a fire extinguishing system for distributing an extinguishing medium of claim 19 , the even and non-porous layer containing iron and epoxy-acrylic is bonded to an exterior surface of the mild steel pipe.

23. The method of providing a fire extinguishing system for distributing an extinguishing medium of claim 19 , wherein the even and non-porous layer has a thickness in a range of 21-27 μm.

Assignees

• Minimax Gmbh & Co Kg
• Mv Pipe Tech Gmbh

Inventors

• Roenpagel Andreas
• Steinhoff Michael

Classifications

• F16L58/1054 Primary

  the coating being placed outside the pipe · CPC title

• A62C35/68 Primary

  Details, e.g. of pipes or valve systems (valves in general F16K) · CPC title

• F16L58/1009 Primary

  the coating being placed inside the pipe · CPC title

• A62C31/28

  Accessories for delivery devices, e.g. supports · CPC title

• B05D7/22

  to internal surfaces, e.g. of tubes · CPC title