Summary of fire testing sites | The knowledge points of the foam fire extinguishing system and the test point summary-Three Education Education

The official textbook of “Fire Safety Technology Practice” and “Comprehensive Capability of Fire Safety Technology” in the 2021 version of this year

The foam fire extinguishing system has made great changes,

The main reason is that the “Design Specifications for Foam Fire Extermination System” GB50151-2010 and “Bubble Fire Differential System Construction and Acceptance Regulations” GB50281-2006 merger

Revised and launched the new “Technical Standards for Foam Fire Exercising System”.

Compared with the original specifications and the “Specifications for the Construction and Acceptance of Foam Fire Extermination System” GB50281-2006, this standard mainly has the following changes:

Variety

(1) Integrate the original specifications and the “Construction and Acceptance Regulations of the Foam Fire Extermination System” GB50281-2006,

And renamed

“Technical Standards for Foam Fire Extermination System”;

(2)

increased

The air foam system is not suitable for low -boiled flammable liquid storage tanks with a boiling point below 45 ° C. The storage temperature is higher than 100 ° C. The relevant terms of the fixed system should not be set;

(3) In terms of the selection and requirements of foam solution, foam proportional mixture (device), foam generator, foam fire pump and other products and equipment

Major modification and deleted

Related term;

(4)

adjusted

The supply intensity and continuous supply time of the vertical storage tank bubble mixed liquid,

And delete

The relevant regulations of the foaming port of the outer floating top storage tank are set on the floating tray;

(5)

deleted

Originally specified in Section 5.2 “Oil Tart Fixed Mid -Foam Fire Fire Fire System”, and integrates its section 5.1 “full flooding with local application system and mobile system” and “high multiplication foam fire extinguishing system” Adjust;

(6) The design of the bubble spray system that protects the transformer is larger

Revise

It

(7) In the power source of the foam fire water pump

The setting of the spare diesel engine pump set and the design requirements of the selection, performance and smoke exhaust pipes of its diesel engine;

(8)

Original Appendix A “Water -soluble liquid bubble mixed liquid supply intensity test method”;

(9) The construction acceptance part is with the design part

, Make a corresponding change, at the same time

Bubble-water spraying system, foam spray system, etc. of construction, debugging, and acceptance of construction;

(10)

Delete or modify

The provisions that do not meet the current national policies;

(11)

The specific acceptance requirements of each system component have modified the qualified assessment standard of the system acceptance.

Knowledge point 1: System composition and classification

(1) Divide according to the jet method

(1) Jets on the liquid

The spray system on the liquid refers to the fire extinguishing system sprayed from the liquid surface into the protected storage tank from the liquid surface. Compared with liquid spraying systems, this system has the advantages of foaming that is not vulnerable to oil, and can use cheap ordinary protein foam. It has three applications: fixed, semi -fixed and mobile.

(2) Sub -jet system

The liquid spraying system refers to the fire extinguishing system sprayed from the liquid surface into the protected storage tank from the liquid surface. After the foam is injected with the lower part of the liquid burning layer, it rises to the surface of the liquid and spreads away to form a foam layer of fire extinguishing system. The system is usually designed to fixed and semi -fixed.

Change: Cancel the semi -liquid subordinate jet system

(2) System composition

The foam fire extinguishing system is generally used by foam liquid storage tanks, foam fire pumps, foam pumps, foam proportional mixtures (devices), foam generated devices,

Pressure container,

Fire detection and start -up control device, control valve and pipeline system components.

Change: Added pressure container

Knowledge point 2: System selection

(1) Basic requirements of the system selection

(1) The low multiplication foam fire extinguishing system should be selected in the storage area of ​​the liquid storage tank area.

(2) The choice of fixed, semi -fixed or mobile foam fire extinguishing system in the storage area of ​​Class A, B, C, and C, should comply with the current relevant national standards.

And the storage temperature greater than 100 ° C is not suitable for a fixed system.

(3) The choice of full flooding, local application and mobile medium multiples, and high multiplication foam fire extinguishing systems should be based on the overall layout of the protective area, the degree of fire of fire, the types of fire, and the conditions of rescue conditions. OK after comparison.

(4) The selection of the foam fire extinguishing system in the tank area shall meet the following requirements:

① Fixed top storage tanks of non -water -soluble A, B, C, and C liquid. When the liquid is used to spray or the conditions are appropriate, the liquid spraying system can be used.

② Water -soluble A, B, C liquid and other fixed top storage tanks of A, B, and C, which have a destructive effect on ordinary foam, should be selected with liquid spraying system.

③ The outer floating top and inner floating top storage tank should be selected.

④ The non -water -soluble liquid outer floating top storage tank, inner floating top storage tank, fixed top storage tank with a diameter of 18m, and water -soluble A, B, and C -liquid vertical storage tank shall not be used as the main fire extinguishing facilities.

⑤ A fixed top storage tank with a height greater than 7m or more than 9m, and foam guns must not be used as the main fire extinguishing facilities.

Change one: delete

The foam fire extinguishing system in the original oil tank should be fixed,

Increase

High -temperature combustible liquid storage tanks with a storage temperature greater than 100 ° C should not be set to set a fixed system.

Change 2: Delete

The multiples of the foam fire extinguishing system in the oil tank should use the liquid jet system.

Change three: delete

Related descriptions related to the spraying system of the semi -liquid.

(2) System applicable place

(1) The full flooding system can be used in the following places:

① Close space.

② There is a place where fixed walls or other fence facilities that prevent the loss of foam.

③ Small closed space places and small places with fixed fences or other fence facilities that prevent foam loss or other fence facilities should be set.

(2) The local application system of the high multiplier bubble can be used in the following venues:

① Class A fire and Class B fireproof venue that is not completely closed around.

② Line or storage tank coffin area of ​​natural gas liquefaction stations and receiving stations.

(3)

The local application system for medium multiples can be used for flowing type B fireproof places with a fixed position area of ​​not more than 100 square meters.

(4) The mobile system can be used in the following places:

① It is difficult to determine or it is difficult to approach the fire.

② When a fire occurs, it is necessary to discharge, cool down, or eliminate the closed space of harmful gases.

③ The medium multiple foam system can also be used for flammable liquid flowing fires with an area of ​​not more than 100 square meters.

(5) Foam-water spraying system can be used in the following venues:

① indoor places with non -water -soluble liquid leakage fires.

② Water -soluble liquid indoor places with no more than 25L/㎡ or more than 25L/㎡ but buffer.

(6) Foam spray system can be used in the following venues:

① Oil -immersed power transformer at the independent substation.

② Non -water -soluble liquid indoor places with an area of ​​not more than 200 square meters.

Change one: The integrated section of the high multiplier and the mid -multiplier full flooding system.

Change 2: The integrated section of the mobile high multiplier and the medium foam system.

Knowledge point 3: The relevant specifications of the foam fire extinguishing system change

(1) Basic requirements

(3) Storage area of ​​the fixed foam fire extinguishing system,

When the foam fire truck at the neighboring fire station was unable to reach the scene within 5 minutes,

The foam fire hydrant should be distributed evenly outside the fire bank, and the spacing of the foam fire hydrant should not be greater than 60m. The function of foam fire hydrants is to connect the foam gun to save the fire in the tank area.

(4) When the foam mixing liquid flow of the fixed foam foam fire extinguishing system is greater than or equal to L00L/S, the system pump, proportional hybrid device and control valves on their pipelines, and the trunk control valve shall have remote control Function.

The control execution of the “Petrochemical Enterprise Design Fire Standards” (GB 50160-12, 2018), “Petroleum and Natural Gas Engineering Design Fire Fire Standards” (GB50183-2004), “Petroleum Reserve Design Specifications” Regulations of GB50737-2011).

Change part:

① Increase: When the bubble fire truck near the fire station cannot reach the scene within 5 minutes,

② Increase: Control and implementation of the “Petrochemical Enterprise Design Fire Standards” (GB 50160-128, 2018), “Petroleum and Natural Gas Engineering Design Fire Fire Specification” (GB50183-2004) Regulations of the Specifications (GB50737-2011).

(2) Fixed top storage tank

The protection area of ​​the fixed top storage tank shall be calculated according to the cross -section area of ​​the tank. The supply intensity and continuous supply time of the bubble hybrid fluid shall meet the following requirements:

(1) The spray foam fire extinguishing system on the non-water-soluble liquid storage liquid, the supply strength and continuous supply time of the bubble mixed solution should not be less than the provisions of Table 3-8-1.

Table 3-8-1 Foam mixed liquid supply intensity and continuous supply time

Change point:

① Delete and remove: the protein of the fixed and semi -fixed system

② Delete membrane fluorin in the original fluorin, water film, membrane fluorin

③ The supply intensity of fluoroprotein and water -forming is changed from 5 to 6. The original supply time of the continuous supply time is separated into type A liquid and type B liquid, and the data is adjusted related.

(2) The spraying system under the non -water -soluble liquid storage liquid should not be less than 6.0L/ (min · m2), and the continuous supply time should not be less than 60min.

change:

① The supply intensity of the bubble hybrid fluid changed from 5 to 6.

② The continuous supply time was changed from 40min to 60min.

③ Delete it in the middle of the night.

(3) A, B, and C storage tanks that have a destructive effect on the water-soluble liquid and other bubbles. The supply strength and continuous supply time of the bubble mixture should not be less than the provisions of Table 3-8-2.

Table 3-8-2 Anti-soluble foam mixture supply intensity and continuous supply time

Note: The water -soluble liquid that is not listed in this table is determined by the test strength and continuous supply time of the bubble mixed liquid.

Change: A significant adjustment and increase of the entire table.

(4) The model and quantity of the spraying system foam generator on the liquid spray system are determined according to the required foam mixed liquid flow, and the number of settings is not less than the “Technical Standards for the Foam Fire Extermination System” (GB 50151-2021). When the number of foam generation required for a storage tank is greater than one, the foam generator of the same specifications should be selected, and it should be evenly arranged along the tank; the water -soluble liquid storage tank should be provided with a foam buffer device.

Knowledge point 4: System design requirements

(3) Floating top storage tank

The protection area of ​​the steel single -disc and the dual -disk -type floating top storage tank shall be determined according to the ring area between the wall and the foam weir. The supply intensity of the foam mixed liquid of non -water -soluble liquid should not be less than 12.5L/(min · m2),

The continuous supply time should not be less than 60min, and the maximum protection of a single bubble generator should not be greater than 24m.

① The continuous supply time was changed from 30min to 60min.

② Add new content: The maximum protection of a single foam generator should not be greater than 24m.

The foaming shield of the outer floating top storage tank should be set on the top of the tank wall, and the design of its foam weir board should meet the following requirements:

(1) The bubble weir panel should be sealed by 0.2m higher.

(2) The spacing of the foam weir and the wall of the tank should not be less than 0.9m.

(3) The lowest part of the foam weir plate should be set up. The opening area should be determined by 280mm2 per 1m2 ring area, and the height of the drainage hole should not be greater than 9mm.

① Delete the original content: When the foam jet port is set at the lower part of the metal raindrop plate, the height of the bubble weir panel should not be less than 0.3m.

② Delete the original content: When the foam jet port is set at the top of the tank wall, the relevant requirements of the foam weir board.

The model and quantity of the outer floating top storage tank foam generator shall be determined according to the computing strength of the foam mixing liquid supply, the continuous supply time, and the maximum protection of the maximum protection of a single foam generator. The foam diversion cover corresponding to the foam generator should be set on the top of the tank wall.

The two -semeter should be set on the platforms of the storage tank, and the following regulations should be compared with:

(1) The binsea device shall be connected from the pipeline to the fire prevention bank, and the pipe diameter of the pipeline shall meet the pressure and flow requirements of the foam gun.

(2) The tooth interface should be set on the connection pipe outside the fire prevention embankment, which should be 0.7m from the ground height.

(3) When connecting to the fixed system, the control valve should be set outside the fire prevention embankment.

Revised the original content: Direct> 45m floating top storage tank ladder platform sets the regulations for tube interface. Increase the requirements of 0.7m from the ground height.

(4) Inner floating top storage tank

The protection area of ​​the steel single -disc, dual -disk -type internal floating top storage tank shall be determined according to the ring area between the wall and the foam weir plate;

Floating top storage tanks in the floating material with a diameter of not greater than 48mm should be treated as fixed top storage tanks.

For the original “other inner floating tops are treated according to a fixed top storage tank”, the revised floating top storage tank of the inner floating top of the floating material with a diameter of not more than 48mm should be treated as a fixed top storage tank. “

Settings of steel single -disc, dual -disk -type internal floating top storage tank setting, single foam generator protective perimeter and foam mixtor supply intensity and continuous supply time shall comply with the following regulations:

(1) Bubble weir panels should not be less than 0.55m from the tank wall, and its height should not be less than 0.5m.

(2) A single bubble generator protects the perimeter than 24m.

(3) The supply intensity of non -water -soluble liquids and methanol gasoline should not be less than 12.5L/(min · m2).

(4) The continuous supply time of the bubble mixed solution should not be less than 60min.

The original 30min was revised as 60min.

(5) Other places

When a foam gun or foam gun system is set up by the loading and unloading stack of the type A, B, and C, the following provisions should be compared with:

(1) Pumps, metering instruments, vehicles and various equipment related to loading and unloading products should be protected.

(2) The bubble mixed liquid of the train loading and unloading table should not be less than 30L/s.

(3) The amount of mixed liquid of the foam of the car loading and unloading stack should not be less than 8L/s.

(4) The continuous supply time of the bubble mixed solution should not be less than 30min.

When the non -water -soluble liquid with a coffee weir flows fires, the protection area shall be calculated according to the area occupied by the ground area surrounded by coffin and the area occupied by the non -combustible structure. Smaller than below.

Supply intensity and continuous supply time of foam mixed fluid

When a foam gun and foam cannon system are set up when the outdoor -flowing fire places are provided for outdoor -flowing fire places caused by the leakage of the liquid leakage, the maximum flow area should be determined according to the specific situation of the protective place. Regulations of the table.

increased

increased

increased

deleted

Revise

Change: Cancel the semi -liquid subordinate jet system

change:

change:

change:

change:

change:

Supply intensity and continuous supply time of foam mixed fluid

Consolidate practice

Question 1: The following statement about the classification of the foam fire extinguishing system is wrong ().

A. Divided into fixed systems, semi -fixed systems, and mobile systems according to the system structure

B. Divide into a liquid spray system, liquid spray system, semi -liquid jet system according to the jet method

C. Divide the foam multiples into a low multiplier foam fire extinguishing system, medium multiple foam fire extinguishing system, high multiplication foam fire extinguishing system

D. Divided into a full flooding system, local application system, mobile system, foam-water spray system, foam spray system according to the system form

【Answer】 B

Question 2: The local application system for medium multiples can be used for () fire places.

A. Flowing position area with a fixed position area of ​​not more than 100 square meters

B. Flowing position with a fixed position area of ​​not more than 100 square meters

C. Flowing position area with a fixed position area of ​​not greater than 500 square meters

D. Flowing position area with a fixed position area of ​​500 square meters

Question 3: Non -water -soluble liquid tank jet system, the supply intensity of the bubble mixed liquid should not be less than ().

A. 5.0L/ (min · m2)

B. 6.0L/ (min · m2)

C. 8.0L/ (min · m2)

D. 10.0L/ (min · m2)

Question 4: A fixed foam fire extinguishing system is adopted by a category C -type liquid storage tank. The continuous supply time should not be less than () when the water formation foam liquid is used.

A.15min

B.30min

C.45min

D.60min

Question 5: The following statement about the foaming system of steel single -disc and dual -disk -type floating top storage tank foaming system is correct ().

A. The protection area shall be determined according to the horizontal section area of ​​the tank

B. The supply intensity of the foam mixed liquid of non -water -soluble liquid should not be less than 12.5L/(min · m2)

C. The continuous supply time of the foam mixture of non -water -soluble liquid should not be less than 30min

D. The maximum protection of a single bubble generator should not be less than 24M

Question 6:

The following practices about the foaming hood of the outer floating top storage tank and its foam weir design are correct ().

A. The foam diversion shadow should be set at the bottom of the tank wall, and the foam weir panel should be sealed by 0.5M

B. The foaming shield should be set on the top of the tank wall, and the bubble weir panel should be sealed by 0.2M

C. The foam diversion shaders should be set at the bottom of the tank wall, and the spacing of the foam weir plate and the tank wall should not be less than 0.9m

D. The foam diversion shadow should be set on the top of the tank wall, and the spacing of the foam weir plate and the tank wall should not be less than 0.5m

The knowledge points and the test points of the foam fire extinguishing system are all summarized, and the friends quickly collect it!

【Answer】 B

【Answer】 B

【Answer】 B

【Answer】 B

【Answer】 B

Product Recommendation: liquid foam pump