1 scope
The technology standard is applicable to civil and general industrial building of indoor fire automatic spraying system and fire hydrant system pipeline and equipment installation works.
2 construction preparation
2.1 material requirements:
2.1.1 fire spraying pipe should be selected according to the design requirements, generally adopts galvanized carbon steel pipe and pipe fittings, pipe wall inside and outside the galvanized evenly, no rust, no impalement, unbiased and parts, square buckle, Angle of the thread is not complete, are not allowed to wait for a phenomenon.
2.1.2 fire hydrant system pipe should be selected according to the design requirements, generally USES the carbon steel pipe or seamless steel tube, tubing shall not be bent, rust, double skin and concave and convex inequality.
2.1.3 spraying system of fire alarm valve, valve, control valve, retarder, water flow indicator, combined pump unit, and the main components of the specifications should comply with the design requirements, fittings is complete, the casting, the surface is bright and clean, no crack, opening and closing flexible, the factory quality certificate.
2.1.4 specification, type, action temperature of the spray head should comply with the design requirements, design rules, thread is complete, thermal bag breakage and loosening, fusible piece without shedding and loose. Has the factory quality certificate.
2.1.5 should comply with the design requirements of the specifications of the hydrant box type, the body surface smooth, bright and clean. Flexible metal case without rust, scratches, the door is open. The cabinet founder, the accessories is complete. Plug valve appearance rules, no crack, opening and closing flexible, closed tight, packing in good condition, has the factory quality certificate.
2.2 the main equipment:
2.2.1 set of silk machine, grinding wheel saws, bench drill, electric hammer, hand wheel, hand electric drill, electric welding machine, electric machinery, hydraulic test pump.
2.2.2 sets of wire plate, pipe wrench, vise, pressure pliers, chain tongs, hammer, hacksaw, wrench, nail gun, chain hoist, welding tools, etc.
2.3 operation conditions:
2.3.1 the main structure acceptance, the scene has been cleaned up.
2.3.2 pipe installation needed baseline should be measured and marked, such as condole top elevation, the ground elevation, the dividing line of position.
2.3.3 based upon examination equipment conform to the requirements of the design, installation conditions.
2.3.4 pipeline installation need of operation should be finished by professional set-up.
2.3.5 check pipe support, reserve the position of the holes, size is correct.
2.3.6 spray head installed according to the architectural decoration graph to determine position, as defined by the condole top material thickness ceiling keel installed spray head elevation. Condole top sealing in the spray head to reserve the position openings on the roof.
3 operation process
3.1 process:
Prepare - main installation - alarm valve installation to vertical pipe installation,
Spraying hierarchical power tubes, hydrant and branch pipe installation, water flow indicator, fire pump, cistern, the water pump bonder and installation
Pipeline pressure test to pipe flushing, spray head branch pipe installation (system integrated testing and flushing) - throttling device installed -
Alarm valve fittings, hose fittings, spray head installation - water system debugging
3.2 installation preparation:
3.2.1 seriously familiar with drawings, according to the construction plan, technology, safety disclosure of specific measures to choose material, measurements, drafting, prefabrication.
3.2.2 check relevant professional drawings, see if there are any more cross all kinds of coordinates and elevation of the pipe or inappropriate position of arrangement, promptly with the designer on the, go through the formalities of negotiation.
3.2.3 check the embedded parts and reserved hole are accurate.
3.2.4 check pipes, pipe fittings, valves, equipment and component meets the design requirements and quality standards.
3.2.5 to arrange reasonable construction sequence, avoid work cross interference, affect the construction.
3.3 main installation:
3.3.1 spraying pipe generally requires the use of galvanized pipe fittings (main in more than 100 mm in diameter, is used when no galvanized pipe welding flange connection, after trying the pressure marking down processing galvanized). Need galvanized processing pipeline should choose carbon steel pipe or seamless steel tube, are not allowed to brush before galvanized processing oil pipeline and pollution. Need to tear open outfit galvanized pipes should be arranged before the construction.
3.3.2 rainfall distribution on 10-12 spraying dry work flange connection each pipe length should not be more than 6 m, straight pipe can put together a few root, use chain installation, but shoulds not be too long. Also adjustable straight after the number in turn order lifting, lifting, should lift pipe end first, after waiting for stable again lift at the other end.
3.3.3 when fastening flange pipe connections, check whether the flange end face is clean, use 3 ~ 5 mm rubber gasket. Of the specifications of the flange bolts should comply with the rules. The most unfavorable point to tighten bolts should be tight and symmetry in turn fastening. The flange interfaces should be installed in the easy disassembling position.
3.3.4 fire hydrant system main should be used according to the design requirements for pipe installation, choose carbon steel tube or seamless steel pipe according to the requirements of pressure.
3.3.4.1 pipe before welding interface floating rust, dirt and grease should be removed.
3.3.4.2 when wall thickness 4 mm or less, the welding should be adopted when the diameter of 50 mm or less; Wall thickness of 45 mm, or welding should be adopted when a diameter of 70 mm or more.
3.3.4.3 different diameter of pipe welding connection, as in two pipe diameter is not more than 15% of the small diameter, can be big pipe reducing and small pipe butt welding. If the two tube differ by more than 15% of small diameter, short diameter pipe welding should be processing.
3.3.4.4 pipe counterpart on the weld shall not open welding pipe, joint shall not be installed, on a hanger position.
3.3.4.5 pipeline wall section can not have interfaces () or welding pipe through the expansion joints should be anti-freezing measures.
3.3.4.6 openings to stagger when welding the weld carbon steel pipe, and make the weld toward the direction of observation and repair.
When 3.3.4.7 pipe welding spot welding more than three points first and then check the reserved the position, direction, variable diameter etc, after having confirmed to find straight, alignment, welding, fastening card, pull down temporary fixed.
3.4 installation of alarm valve: should be located in the location of the clear, easy to operate, is apart from the ground level should be about 1 m. Alarm valve surface drainage measures should be put, the environment temperature should not be lower than + 5 ℃. Alarm valve assembly shall be according to product specifications and design requirements, the control valve should be open/close indication system, and makes the valve working in a normally open state.
3.5 spray fire and fire hydrant pipe installation:
3.5.1 track of riser dark outfit in the shaft, inside the tube well fixed, embedded iron pieces of card installed on the bottom of the riser of steam-water wants firm, to prevent the riser plate.
3.5.2 vertical GuanMing installed on each floor to floor reserved holes, through the riser with the structure, in order to reduce the riser interface.
3.6 spray fire layered power pipe installation:
3.6.1 pipe branch of obligate mouth should be prepared before assembly, wire connect with tee positioning obligate mouth, welding can be open on the main welding on wrought iron pipe hoop, straightening after lifting. All the reserved mouth with good temporary plugging.
3.6.2 need processing of galvanized pipe in other prior to installation of pipeline pressure testing, demolition, galvanized after secondary installation.
3.6.3 corridor ceiling pipe installation and air shaft position to coordinate.
3.6.4 radar echoes captured spraying line connected to unfavorable use different diameter bushing, should use reducer coupling, bend shall not be used on the bushing, should use reducing elbow, tee on the use of a bushing, cross the multi-purpose two bushing.
3.6.5 upward spraying spraying head conditional can be installed with branch main order. After the other pipe installation has difficulty in operating position should be installed upward spraying spraying head.
3.7 fire hydrant and branch pipe installation:
3.7.1 hydrant box to comply with the design requirements, the material is wood, iron and aluminum alloy, etc.), plug valve such as single and double export control. Product manufacturing license and certificate should be the fire department before use.
3.7.2 hydrant pipe to plug valve coordinates and elevation positioning of mouth, again after the approval solid fire hydrant box, box to find is stable before the check valve is installed, plug valve side in a box should be on one side of the door is open when the door is open should be flexible.
3.7.3 hydrant box installed on the light weight partition wall, shall have the reinforcement measures.
Flow detector installed 3.8: general installation at the levels of each layer of main branches or on the main branch of a region. Should be made, slope shoulds not be too big, to ensure sensitive blade activity, water flow indicator should be kept before and after five times the length of pipe diameter of straight pipe installation, pay attention to the arrow in the direction of flow and the indicator when installation. Domestic products can be directly installed on the threaded tee, imported products can be used in main opening banding solid shape card. The flow indicator is suitable for 50 to 150 mm diameter pipes installed.
3.9 fire pump installation:
3.9.1 pump specifications should comply with the design requirements, the pump should be used in the irrigation water absorption, according to the design drawings for the pump foundation construction, the suction pipe should add shock absorber. Pressure pump is not no damping device, but should add and subtract vibration device, constant pressure pump in and out of the gate and noise prevention facilities, water pump export should be slow close check valve.
3.9.2 pump piping installation shall be positioned in the pump is leveling, after solid. Water pump equipment shall not sustain the weight of the pipe. Order for check valve installation, valve and pump in turn tight, with the pump flange to connect piping of a tight with the valve flange, sank a thread for straight alignment measure pipe size, pipe welding first on the flange, to loosen the flange removed welding, good cooling and then connected to the valve, and then welded into the piping another section.
3.9.3 piping flange should be consistent with the flange of pumps, valves, valve installation the handwheel is easy to operate, the direction should be level consistent, neat piping.
3.10 high water tank installation: should the structure before the caps in place, and shall do the water test, fire water and other sharing should be to ensure the fire water tank is not it, fire total water use in 10 minutes. The life and the hydration time should make water often is in a state of flow, to prevent water quality deteriorate. Fire outlet pipe should add one-way valve (to prevent fire pressure, water into water tank). All water nozzle shall be prefabricated processing, if the site welding stiffening plate shall be welded on the tank.
Installation: 3.11 the pump joint specifications should be selected according to the design, there are three types: type wall, ground, underground. The installation position should be clearly marked, is easy to operate, valve position should be near the bonder can not have obstacles. Constant pressure relief valve should be according to the system work pressure, prevent fire engine high pressure damage indoor pipeline and components, joint should be equipped with a drain valve.
3.12 fire pipeline pressure test can be layered segments, water peak to exhaust, high and low points each with a pressure gauge, check whether there is any leakage on the pipeline after filled with water, leakage of flange, valve and other parts, if any, should be in front of the pressurized fastening, booster when leakage appear again after completes the tag, unloading post-processing. Drain water treatment when necessary. Winter testing environment temperature shall not be lower than + 5 ℃, the summer test had better not use directly outside water to prevent dewing. After testing qualified acceptance formalities in time.
3.13 pipe flushing: fire pipeline in after the pressure test can do washing work continuously. Prior to flush the system flow decompression orifice plate, filter device dismantled and packed again after flushing water quality qualified, flushing out of water to discharge, shall not damage other finished products.
3.14 spraying head branch pipe installation refers to condole type spraying a branch pipe, and at the end of the tube is not completed with branch main order at the same time, to a simultaneous and ceiling decoration. Ceiling keel loaded, according to the condole top material thickness set spraying head obligate mouth level, according to the ceiling decoration figure determine the coordinates of spray head, difficult to really in the position of branch pipe obligate mouth do. Branch pipe diameter shall be 25 mm, with 25 mm * 15 mm at the end of the reducer coupling, coupling mouth flat ceiling decoration layer, anchor installation. Branch at the end of the elbow should be within 100 mm yucca is fixed, to prevent the nozzle not firm contact with the condole top, up and down movement. Branch pipe loaded, it should be
Mouth with plug and tighten. For system testing.
3.15 spraying system testing: before sealing condole carries on the system pressure testing, in order not to affect the ceiling decoration schedule can be layered section pressure test, pressure test after flushing pipe, can be closed after qualified condole top. Condole top material in pipe hoop mouth open a 30 mm hole, revealing the reserved ports and plug off after ceiling decoration installation spray head.
: 3.16 the throttle device in a high-rise fire control system, the lower the spray head and fire hydrant flow is too big, can use the device such as decompression orifice or throttling tube equilibrium. Decompression orifice should be set on the horizontal section of not less than 50 mm diameter, orifice diameter should not less than 50%, the diameter of the installation section orifice plate should be installed on the straight pipe flow turning on the downstream side, and the distance of the bent pipe should not be less than twice the diameter of the Settings section. When the throttle tube is adopted, and its length should not be less than 1 m. Throttling pipe diameter on table l - 17.
Table 1-17 throttling tube diameter
Section diameter (mm) 50, 70, 80, 100, 125, 150, 200
Throttling tube diameter (mm) 25 32 40 to 50, 70, 80, 100
3.17 alarm valve fittings installed, shall be carried out before commissioning, delay device installed in the automatic sprinkler sprinkler systems, is to prevent false alarm facilities. Which can be installed according to the instruction and the assembly diagram should be installed between the alarm valve and hydraulic alarm signal line. Hydraulic alarm installed near the alarm valve. Connected to the alarm valve pipe should be galvanized steel pipe.
Hose fittings installation: 3.18 shall be carried out before commissioning. Fire hose should be folded in hang on the shelf or roll, plate tightly in the trunk, fire hoses to stand on the cabinet inside, self-help type nozzle and the hose should be in the hang card or in the bottom part. Fire hose and nozzle, quick joint connection, generally with 14 # lead wire binding two, each not less than two laps, using a clamp, add a lead wire in side. Equipped with electric control button, cooperate with electrical professional construction should be paid attention to.
3.19 spray head installation:
3.19.1 specification, type and action temperature of the spray head to comply with the design requirements.
3.19.2 spray head installed protection area, distance between nozzle and the distance away from the wall, and went to should comply with the specification requirements.
3.19.3 spray head direction of two rows should be installed in the uniformly. Corridor of armor plate to be against condole top, single nozzle shall be installed lateral wing.
3.19.4 install spray head should use special wrench (light fork type), special packing appropriate USES teflon belt, prevent damage and pollution condole top.
3.19.5 water curtain spraying head installed toward the protected object, should be paid attention to in the same water distribution pipe of the same size should be installed on the water curtain nozzle.
3.20 spraying pipe fixed bracket installation should comply with the design requirements.
The location of the steam-water 3.20.1 to not interfere with nozzle spray effect for the principle. To the hanger is apart from the nozzle should be greater than 300 mm, round steel hanger can small to 70 mm.
3.20.2 to prevent nozzle spray water pipe cause greatly shook, main and riser should add the fixed bracket. Main or layered main straight pipe can be located in the middle, from the head and end should not be more than 12 m, single rod hanger length less than 150 mm, don't add anti sway fixed bracket.
3.20.3 anti sway fixed bracket should be able to withstand the pipe, the total weight of parts, valve and pipe water and 50% horizontal thrust without damage or permanent deformation. The direction of the riser to set two anti sway fixed bracket.
3.2.1 set the rain and water curtain automatic sprinkler system used, should be in before open after installation. Often in the absence of heating facilities or environmental temperature higher than 70 ℃, should use dry automatic sprinkler system, dry automatic sprinkler system not spraying entered, should make efforts to pressure flushing. Conditional application of air compressor venting pipe.
3.2.2 water fire fighting system commissioning shall, in accordance with the provisions of reach the fire department testing conditions. Fire pump should be connected to the power and has set up a test run, the most unfavorable point of spray head and fire hydrant test pressure and flow rate can meet the design requirements.
4 quality standards
4.1 ensure project;
Automatic spraying and nozzle location, spacing and direction of the water curtain fire fighting equipment must comply with the design requirements and the rules and regulations of construction.
Methods: observation and control drawings and construction specifications.
4.2 the basic items:
Box type hydrant installation should be tied mouth outwards, the valve from the size of the floor, walls, conform to the rules and regulations of construction. Hose and fire hydrant and fast connection tie tightly, and roll fold, on the tray or stents.
Inspection method: to observe the feet and check.
4.3 allowable deviation projects:
4.3.1 hydrant valve center is apart from the ground 1.2 m, 20 mm allowable deviation. From valve box on the side of 140 mm, inner surface is 100 mm, is apart from the box after allowable deviation 5 mm.
4.3.2 automatic spraying and water curtain fire fighting system of pipeline slope. Water filling system should not be less than 0.002; Pneumatic system and branch pipe shall be not less than 0.004.
4.3.3 hanger and nozzle distance, should not be less than 300 mm, the distance from the end of the nozzle is not greater than 750 mm.
4.3.4 hanger should be located in the section between adjacent nozzle, when adjacent nozzle spacing is not more than 3.6 m, can set a; Less than 1.8 m, allowing the partition Settings.
Testing method: use a ruler and level.
5 finished product protection
5.1 after the fire protection system construction, various parts of the equipment components should have protective measures, to prevent the touch the running water, damage to the decoration products.
5.2 alarm valve fittings, fire hydrant box accessories, all parts of the instrument shall be such as to strengthen management and prevent the loss and damage.
5.3 fire pipeline installation and when the conflict of civil engineering and other pipeline shall not tear open change, should pass design, proper solution of the change of the negotiations.
5.4 spray head when installation shall not be surface pollution and damage to the ceiling decoration.
6 should pay attention to quality problems
6.1 spraying pipe if it is serious. The professional process installation coordination is bad, should have overall arrangement.
6.2 spray head office have leakage phenomenon. Before due to the system pressure will seal condole top, cause water leakage. Must be by the pressure testing before sealing condole top, concealed engineering acceptance formalities.
6.3 spray head and condole top contact not firm, to protect the mouth plate deflection; Due to the end of the branch pipe elbow without a fixed, branch pipe size, make oral disc is not straight.
6.4 spray head not rows, rows. Because the anchor installation.
6.5 work flow indicator insensitive. Due to the installation in the opposite direction or electric contact oxide resulting in poor contact.
6.6 the pump bonder can not pressure. Because the valve does not open, blind plate check valve upside or have not been removed.
6.7 open spray nozzle blockage in the system test. Should do before install nozzle flush or blow off work.
Closed the door is 6.8 fire hydrant is lax. Because the installation is not looking for is or deformation of the intensity of the door is not enough to cause.
6.9 fire hydrant valve closing is lax. By dry pipe is rinsed clean, seat have sundry.
7 should possess the quality of the record
7.1 should have the material equipment factory certificate, the manufacturer production license and statutory testing unit test report.
7.2 material site acceptance records of the equipment.
7.3 fire duct engineering records
7.4 fire, branch pipe engineering records
7.5 spraying, riser preview records
7.6 spraying pipe engineering records
7.7 fire, spraying pipe individual test record
7.8 fire protection, spray system pressure test record
7.9 fire, spraying pipe hidden inspection records
7.10 fire fighting, spraying system flushing records
Fire, water spraying system debugging in 7.11
The technology standard is applicable to civil and general industrial building of indoor fire automatic spraying system and fire hydrant system pipeline and equipment installation works.
2 construction preparation
2.1 material requirements:
2.1.1 fire spraying pipe should be selected according to the design requirements, generally adopts galvanized carbon steel pipe and pipe fittings, pipe wall inside and outside the galvanized evenly, no rust, no impalement, unbiased and parts, square buckle, Angle of the thread is not complete, are not allowed to wait for a phenomenon.
2.1.2 fire hydrant system pipe should be selected according to the design requirements, generally USES the carbon steel pipe or seamless steel tube, tubing shall not be bent, rust, double skin and concave and convex inequality.
2.1.3 spraying system of fire alarm valve, valve, control valve, retarder, water flow indicator, combined pump unit, and the main components of the specifications should comply with the design requirements, fittings is complete, the casting, the surface is bright and clean, no crack, opening and closing flexible, the factory quality certificate.
2.1.4 specification, type, action temperature of the spray head should comply with the design requirements, design rules, thread is complete, thermal bag breakage and loosening, fusible piece without shedding and loose. Has the factory quality certificate.
2.1.5 should comply with the design requirements of the specifications of the hydrant box type, the body surface smooth, bright and clean. Flexible metal case without rust, scratches, the door is open. The cabinet founder, the accessories is complete. Plug valve appearance rules, no crack, opening and closing flexible, closed tight, packing in good condition, has the factory quality certificate.
2.2 the main equipment:
2.2.1 set of silk machine, grinding wheel saws, bench drill, electric hammer, hand wheel, hand electric drill, electric welding machine, electric machinery, hydraulic test pump.
2.2.2 sets of wire plate, pipe wrench, vise, pressure pliers, chain tongs, hammer, hacksaw, wrench, nail gun, chain hoist, welding tools, etc.
2.3 operation conditions:
2.3.1 the main structure acceptance, the scene has been cleaned up.
2.3.2 pipe installation needed baseline should be measured and marked, such as condole top elevation, the ground elevation, the dividing line of position.
2.3.3 based upon examination equipment conform to the requirements of the design, installation conditions.
2.3.4 pipeline installation need of operation should be finished by professional set-up.
2.3.5 check pipe support, reserve the position of the holes, size is correct.
2.3.6 spray head installed according to the architectural decoration graph to determine position, as defined by the condole top material thickness ceiling keel installed spray head elevation. Condole top sealing in the spray head to reserve the position openings on the roof.
3 operation process
3.1 process:
Prepare - main installation - alarm valve installation to vertical pipe installation,
Spraying hierarchical power tubes, hydrant and branch pipe installation, water flow indicator, fire pump, cistern, the water pump bonder and installation
Pipeline pressure test to pipe flushing, spray head branch pipe installation (system integrated testing and flushing) - throttling device installed -
Alarm valve fittings, hose fittings, spray head installation - water system debugging
3.2 installation preparation:
3.2.1 seriously familiar with drawings, according to the construction plan, technology, safety disclosure of specific measures to choose material, measurements, drafting, prefabrication.
3.2.2 check relevant professional drawings, see if there are any more cross all kinds of coordinates and elevation of the pipe or inappropriate position of arrangement, promptly with the designer on the, go through the formalities of negotiation.
3.2.3 check the embedded parts and reserved hole are accurate.
3.2.4 check pipes, pipe fittings, valves, equipment and component meets the design requirements and quality standards.
3.2.5 to arrange reasonable construction sequence, avoid work cross interference, affect the construction.
3.3 main installation:
3.3.1 spraying pipe generally requires the use of galvanized pipe fittings (main in more than 100 mm in diameter, is used when no galvanized pipe welding flange connection, after trying the pressure marking down processing galvanized). Need galvanized processing pipeline should choose carbon steel pipe or seamless steel tube, are not allowed to brush before galvanized processing oil pipeline and pollution. Need to tear open outfit galvanized pipes should be arranged before the construction.
3.3.2 rainfall distribution on 10-12 spraying dry work flange connection each pipe length should not be more than 6 m, straight pipe can put together a few root, use chain installation, but shoulds not be too long. Also adjustable straight after the number in turn order lifting, lifting, should lift pipe end first, after waiting for stable again lift at the other end.
3.3.3 when fastening flange pipe connections, check whether the flange end face is clean, use 3 ~ 5 mm rubber gasket. Of the specifications of the flange bolts should comply with the rules. The most unfavorable point to tighten bolts should be tight and symmetry in turn fastening. The flange interfaces should be installed in the easy disassembling position.
3.3.4 fire hydrant system main should be used according to the design requirements for pipe installation, choose carbon steel tube or seamless steel pipe according to the requirements of pressure.
3.3.4.1 pipe before welding interface floating rust, dirt and grease should be removed.
3.3.4.2 when wall thickness 4 mm or less, the welding should be adopted when the diameter of 50 mm or less; Wall thickness of 45 mm, or welding should be adopted when a diameter of 70 mm or more.
3.3.4.3 different diameter of pipe welding connection, as in two pipe diameter is not more than 15% of the small diameter, can be big pipe reducing and small pipe butt welding. If the two tube differ by more than 15% of small diameter, short diameter pipe welding should be processing.
3.3.4.4 pipe counterpart on the weld shall not open welding pipe, joint shall not be installed, on a hanger position.
3.3.4.5 pipeline wall section can not have interfaces () or welding pipe through the expansion joints should be anti-freezing measures.
3.3.4.6 openings to stagger when welding the weld carbon steel pipe, and make the weld toward the direction of observation and repair.
When 3.3.4.7 pipe welding spot welding more than three points first and then check the reserved the position, direction, variable diameter etc, after having confirmed to find straight, alignment, welding, fastening card, pull down temporary fixed.
3.4 installation of alarm valve: should be located in the location of the clear, easy to operate, is apart from the ground level should be about 1 m. Alarm valve surface drainage measures should be put, the environment temperature should not be lower than + 5 ℃. Alarm valve assembly shall be according to product specifications and design requirements, the control valve should be open/close indication system, and makes the valve working in a normally open state.
3.5 spray fire and fire hydrant pipe installation:
3.5.1 track of riser dark outfit in the shaft, inside the tube well fixed, embedded iron pieces of card installed on the bottom of the riser of steam-water wants firm, to prevent the riser plate.
3.5.2 vertical GuanMing installed on each floor to floor reserved holes, through the riser with the structure, in order to reduce the riser interface.
3.6 spray fire layered power pipe installation:
3.6.1 pipe branch of obligate mouth should be prepared before assembly, wire connect with tee positioning obligate mouth, welding can be open on the main welding on wrought iron pipe hoop, straightening after lifting. All the reserved mouth with good temporary plugging.
3.6.2 need processing of galvanized pipe in other prior to installation of pipeline pressure testing, demolition, galvanized after secondary installation.
3.6.3 corridor ceiling pipe installation and air shaft position to coordinate.
3.6.4 radar echoes captured spraying line connected to unfavorable use different diameter bushing, should use reducer coupling, bend shall not be used on the bushing, should use reducing elbow, tee on the use of a bushing, cross the multi-purpose two bushing.
3.6.5 upward spraying spraying head conditional can be installed with branch main order. After the other pipe installation has difficulty in operating position should be installed upward spraying spraying head.
3.7 fire hydrant and branch pipe installation:
3.7.1 hydrant box to comply with the design requirements, the material is wood, iron and aluminum alloy, etc.), plug valve such as single and double export control. Product manufacturing license and certificate should be the fire department before use.
3.7.2 hydrant pipe to plug valve coordinates and elevation positioning of mouth, again after the approval solid fire hydrant box, box to find is stable before the check valve is installed, plug valve side in a box should be on one side of the door is open when the door is open should be flexible.
3.7.3 hydrant box installed on the light weight partition wall, shall have the reinforcement measures.
Flow detector installed 3.8: general installation at the levels of each layer of main branches or on the main branch of a region. Should be made, slope shoulds not be too big, to ensure sensitive blade activity, water flow indicator should be kept before and after five times the length of pipe diameter of straight pipe installation, pay attention to the arrow in the direction of flow and the indicator when installation. Domestic products can be directly installed on the threaded tee, imported products can be used in main opening banding solid shape card. The flow indicator is suitable for 50 to 150 mm diameter pipes installed.
3.9 fire pump installation:
3.9.1 pump specifications should comply with the design requirements, the pump should be used in the irrigation water absorption, according to the design drawings for the pump foundation construction, the suction pipe should add shock absorber. Pressure pump is not no damping device, but should add and subtract vibration device, constant pressure pump in and out of the gate and noise prevention facilities, water pump export should be slow close check valve.
3.9.2 pump piping installation shall be positioned in the pump is leveling, after solid. Water pump equipment shall not sustain the weight of the pipe. Order for check valve installation, valve and pump in turn tight, with the pump flange to connect piping of a tight with the valve flange, sank a thread for straight alignment measure pipe size, pipe welding first on the flange, to loosen the flange removed welding, good cooling and then connected to the valve, and then welded into the piping another section.
3.9.3 piping flange should be consistent with the flange of pumps, valves, valve installation the handwheel is easy to operate, the direction should be level consistent, neat piping.
3.10 high water tank installation: should the structure before the caps in place, and shall do the water test, fire water and other sharing should be to ensure the fire water tank is not it, fire total water use in 10 minutes. The life and the hydration time should make water often is in a state of flow, to prevent water quality deteriorate. Fire outlet pipe should add one-way valve (to prevent fire pressure, water into water tank). All water nozzle shall be prefabricated processing, if the site welding stiffening plate shall be welded on the tank.
Installation: 3.11 the pump joint specifications should be selected according to the design, there are three types: type wall, ground, underground. The installation position should be clearly marked, is easy to operate, valve position should be near the bonder can not have obstacles. Constant pressure relief valve should be according to the system work pressure, prevent fire engine high pressure damage indoor pipeline and components, joint should be equipped with a drain valve.
3.12 fire pipeline pressure test can be layered segments, water peak to exhaust, high and low points each with a pressure gauge, check whether there is any leakage on the pipeline after filled with water, leakage of flange, valve and other parts, if any, should be in front of the pressurized fastening, booster when leakage appear again after completes the tag, unloading post-processing. Drain water treatment when necessary. Winter testing environment temperature shall not be lower than + 5 ℃, the summer test had better not use directly outside water to prevent dewing. After testing qualified acceptance formalities in time.
3.13 pipe flushing: fire pipeline in after the pressure test can do washing work continuously. Prior to flush the system flow decompression orifice plate, filter device dismantled and packed again after flushing water quality qualified, flushing out of water to discharge, shall not damage other finished products.
3.14 spraying head branch pipe installation refers to condole type spraying a branch pipe, and at the end of the tube is not completed with branch main order at the same time, to a simultaneous and ceiling decoration. Ceiling keel loaded, according to the condole top material thickness set spraying head obligate mouth level, according to the ceiling decoration figure determine the coordinates of spray head, difficult to really in the position of branch pipe obligate mouth do. Branch pipe diameter shall be 25 mm, with 25 mm * 15 mm at the end of the reducer coupling, coupling mouth flat ceiling decoration layer, anchor installation. Branch at the end of the elbow should be within 100 mm yucca is fixed, to prevent the nozzle not firm contact with the condole top, up and down movement. Branch pipe loaded, it should be
Mouth with plug and tighten. For system testing.
3.15 spraying system testing: before sealing condole carries on the system pressure testing, in order not to affect the ceiling decoration schedule can be layered section pressure test, pressure test after flushing pipe, can be closed after qualified condole top. Condole top material in pipe hoop mouth open a 30 mm hole, revealing the reserved ports and plug off after ceiling decoration installation spray head.
: 3.16 the throttle device in a high-rise fire control system, the lower the spray head and fire hydrant flow is too big, can use the device such as decompression orifice or throttling tube equilibrium. Decompression orifice should be set on the horizontal section of not less than 50 mm diameter, orifice diameter should not less than 50%, the diameter of the installation section orifice plate should be installed on the straight pipe flow turning on the downstream side, and the distance of the bent pipe should not be less than twice the diameter of the Settings section. When the throttle tube is adopted, and its length should not be less than 1 m. Throttling pipe diameter on table l - 17.
Table 1-17 throttling tube diameter
Section diameter (mm) 50, 70, 80, 100, 125, 150, 200
Throttling tube diameter (mm) 25 32 40 to 50, 70, 80, 100
3.17 alarm valve fittings installed, shall be carried out before commissioning, delay device installed in the automatic sprinkler sprinkler systems, is to prevent false alarm facilities. Which can be installed according to the instruction and the assembly diagram should be installed between the alarm valve and hydraulic alarm signal line. Hydraulic alarm installed near the alarm valve. Connected to the alarm valve pipe should be galvanized steel pipe.
Hose fittings installation: 3.18 shall be carried out before commissioning. Fire hose should be folded in hang on the shelf or roll, plate tightly in the trunk, fire hoses to stand on the cabinet inside, self-help type nozzle and the hose should be in the hang card or in the bottom part. Fire hose and nozzle, quick joint connection, generally with 14 # lead wire binding two, each not less than two laps, using a clamp, add a lead wire in side. Equipped with electric control button, cooperate with electrical professional construction should be paid attention to.
3.19 spray head installation:
3.19.1 specification, type and action temperature of the spray head to comply with the design requirements.
3.19.2 spray head installed protection area, distance between nozzle and the distance away from the wall, and went to should comply with the specification requirements.
3.19.3 spray head direction of two rows should be installed in the uniformly. Corridor of armor plate to be against condole top, single nozzle shall be installed lateral wing.
3.19.4 install spray head should use special wrench (light fork type), special packing appropriate USES teflon belt, prevent damage and pollution condole top.
3.19.5 water curtain spraying head installed toward the protected object, should be paid attention to in the same water distribution pipe of the same size should be installed on the water curtain nozzle.
3.20 spraying pipe fixed bracket installation should comply with the design requirements.
The location of the steam-water 3.20.1 to not interfere with nozzle spray effect for the principle. To the hanger is apart from the nozzle should be greater than 300 mm, round steel hanger can small to 70 mm.
3.20.2 to prevent nozzle spray water pipe cause greatly shook, main and riser should add the fixed bracket. Main or layered main straight pipe can be located in the middle, from the head and end should not be more than 12 m, single rod hanger length less than 150 mm, don't add anti sway fixed bracket.
3.20.3 anti sway fixed bracket should be able to withstand the pipe, the total weight of parts, valve and pipe water and 50% horizontal thrust without damage or permanent deformation. The direction of the riser to set two anti sway fixed bracket.
3.2.1 set the rain and water curtain automatic sprinkler system used, should be in before open after installation. Often in the absence of heating facilities or environmental temperature higher than 70 ℃, should use dry automatic sprinkler system, dry automatic sprinkler system not spraying entered, should make efforts to pressure flushing. Conditional application of air compressor venting pipe.
3.2.2 water fire fighting system commissioning shall, in accordance with the provisions of reach the fire department testing conditions. Fire pump should be connected to the power and has set up a test run, the most unfavorable point of spray head and fire hydrant test pressure and flow rate can meet the design requirements.
4 quality standards
4.1 ensure project;
Automatic spraying and nozzle location, spacing and direction of the water curtain fire fighting equipment must comply with the design requirements and the rules and regulations of construction.
Methods: observation and control drawings and construction specifications.
4.2 the basic items:
Box type hydrant installation should be tied mouth outwards, the valve from the size of the floor, walls, conform to the rules and regulations of construction. Hose and fire hydrant and fast connection tie tightly, and roll fold, on the tray or stents.
Inspection method: to observe the feet and check.
4.3 allowable deviation projects:
4.3.1 hydrant valve center is apart from the ground 1.2 m, 20 mm allowable deviation. From valve box on the side of 140 mm, inner surface is 100 mm, is apart from the box after allowable deviation 5 mm.
4.3.2 automatic spraying and water curtain fire fighting system of pipeline slope. Water filling system should not be less than 0.002; Pneumatic system and branch pipe shall be not less than 0.004.
4.3.3 hanger and nozzle distance, should not be less than 300 mm, the distance from the end of the nozzle is not greater than 750 mm.
4.3.4 hanger should be located in the section between adjacent nozzle, when adjacent nozzle spacing is not more than 3.6 m, can set a; Less than 1.8 m, allowing the partition Settings.
Testing method: use a ruler and level.
5 finished product protection
5.1 after the fire protection system construction, various parts of the equipment components should have protective measures, to prevent the touch the running water, damage to the decoration products.
5.2 alarm valve fittings, fire hydrant box accessories, all parts of the instrument shall be such as to strengthen management and prevent the loss and damage.
5.3 fire pipeline installation and when the conflict of civil engineering and other pipeline shall not tear open change, should pass design, proper solution of the change of the negotiations.
5.4 spray head when installation shall not be surface pollution and damage to the ceiling decoration.
6 should pay attention to quality problems
6.1 spraying pipe if it is serious. The professional process installation coordination is bad, should have overall arrangement.
6.2 spray head office have leakage phenomenon. Before due to the system pressure will seal condole top, cause water leakage. Must be by the pressure testing before sealing condole top, concealed engineering acceptance formalities.
6.3 spray head and condole top contact not firm, to protect the mouth plate deflection; Due to the end of the branch pipe elbow without a fixed, branch pipe size, make oral disc is not straight.
6.4 spray head not rows, rows. Because the anchor installation.
6.5 work flow indicator insensitive. Due to the installation in the opposite direction or electric contact oxide resulting in poor contact.
6.6 the pump bonder can not pressure. Because the valve does not open, blind plate check valve upside or have not been removed.
6.7 open spray nozzle blockage in the system test. Should do before install nozzle flush or blow off work.
Closed the door is 6.8 fire hydrant is lax. Because the installation is not looking for is or deformation of the intensity of the door is not enough to cause.
6.9 fire hydrant valve closing is lax. By dry pipe is rinsed clean, seat have sundry.
7 should possess the quality of the record
7.1 should have the material equipment factory certificate, the manufacturer production license and statutory testing unit test report.
7.2 material site acceptance records of the equipment.
7.3 fire duct engineering records
7.4 fire, branch pipe engineering records
7.5 spraying, riser preview records
7.6 spraying pipe engineering records
7.7 fire, spraying pipe individual test record
7.8 fire protection, spray system pressure test record
7.9 fire, spraying pipe hidden inspection records
7.10 fire fighting, spraying system flushing records
Fire, water spraying system debugging in 7.11
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