1 scope
The standard is suitable for civil and
industrial buildings set in carbon dioxide fire extinguishing system, Halon
1211, 1301 fire extinguishing system of pipeline and equipment installation.
2 construction preparation
2.1 after receiving the task, earnestly
familiarity with construction drawings, checked against the renovation and the
construction site pipe and nozzle position is consistent, as problems with
design consultation and the negotiation formalities in time. Determined according
to the characteristics of the construction method, is equipped with the
resources required.
2.2 equipment and materials:
2.2.1 fire service fire extinguishing
system main equipment selection of materials shall comply with 611
"General requirements for the installation of fire engineering" of
the relevant content.
2.2.2 major equipment: fire extinguishing
agent storage containers and system components including valves, container
valve, selector valves, valve drive device and nozzle. These system components
should be addressed to the national quality supervision and testing center
qualified. Cannot retest products used in the system, such as security patch
and so on, should be issued by the manufacturer of the same batch of product
test reports.
2.2.3 General material: pipes and fittings,
steel, welding rods, nitrogen, oxygen, acetylene, PTFE tape, expansion bolts,
bolts, nuts, and gaskets; oil, paint, thinner, smaller lines, wire, batteries,
and so on.
2.3 main machines: saw tube machine, casing
machine, bench drill, hand drill, shot nail gun, welding machine, air
compressor, dedicated bent tube machine, step phone, tube clamp, pressure case,
handsaw, hammer, adjustable tube dedicated bracket, hacksaw, file, die, wrench,
live wrench, screwdriver, hammer, cold chisel, steel tape, flat feet, square,
oil standard caliper, level feet, line pendant, white silk or white, pencil,
chalk, pencil,.
2.4 operating conditions:
2.4.1 reserved embedded should be aligned
with the structure of construction.
2.4.2 required for network installation
reference line shall be determined and marked. Ceiling in the pipeline should
be completed by the ceiling.
2.4.3 equipment should be installed in the
device after you complete the crude decoration.
3 operational processes
3.1 process:
Installation ready to install → → network → system
equipment and accessories installed commissioning and function of acceptance
3.2 installation preparation:
3.2.1 familiarity with drawing paper and
review pipelines to control site, identify problems and design solutions in a
timely manner. Check for correct reserve embedded; interim pick your cut and
design, construction coordination.
3.2.2 enter testing equipment and
materials: equipment and material specifications: model shall meet the design
requirements, look, defects, deformations and corrosion-free, galvanized or
painted uniform no shreds, interface thread and flange seal surface damage;
pressured pharmaceutical cylinder pressure gauge pointer should be within the
specified range. Select valve, check valve, high pressure hose, collecting pipe
hydrostatic test pressure and leak test results one by one, shall meet the
specifications provided.
3.3 network installation:
3.3.1 gas fire suppression system pipe
should be selected according to design requirements or the storage pressure,
cold-drawn precision seamless steel tube and is usually used inside and outside
galvanized. When the nominal diameter less than or equal to 80mm, the threaded
connections should be used when 80mm mm nominal diameter pipe, flange
connection should be used. Threaded and flanged fittings should meet the test
pressure and inside and outside galvanized. For corrosive environments can be used
for zinc coating or stainless steel pipes.
3.3.2 the piping installation should be
carried out before straightening and cleaning up debris. Flange connections,
were damaged by welding zinc plating to do with preservatives. Thread
connection, thread packing polyethylene PTFE tape should be used. Cutting
nozzle application file NET Burr.
3.3.3 fire extinguishing pipe must be fixed
firmly. Nominal diameter mains greater than or equal to 50mm, the vertical and
horizontal direction should at least install a baffle brace. When through the
floors of buildings, and shall have a baffle on each bracket. When the
horizontal line changes direction, slosh bracket should be added. Piping
support and hanger maximum spacing should be installed in accordance with the following
provisions:
Nominal diameter (mm): 15 20 25 32 40 50 65
80 100 150
Maximum spacing
(m):1.51.82.12.42.73.43.53.74.35.2
3.3.4 dry tube installed, a bottle of pipe
should be installed first, find the right size after immobilization, distance
between tubes and tube should be in strict accordance with construction
drawings to determine, ensure the equipment installation size, then order other
pipelines. All piping installation size should be consistent with the design
drawings, do not arbitrarily changing the pipe direction and length.
3.3.5 halon 1301 and tee diversion of
export carbon dioxide pipeline should be installed horizontally.
3.3.6 ceiling sprinkler branch pipe
installation, nozzle position should be determined according to the drawings in
the field, can fit ceiling decoration of the conditional, but ceiling panels
should be completed before the system pressure, tightness test. Sprinkler
branch pipe should be added to the attachment bracket, bracket and the nozzle
duct length should not exceed 500mm.
3.3.7 network strength test shall be
performed is installed, such as the use of hydraulic pressure test, the test
pressure is 1.5 times working pressure. Such as air pressure test, the test
pressure is 1.2 times times the working pressure. Test pressure regulator 5min,
no significant leakage, I think the pipe deformation for qualified. Pipe
hydrostatic strength test pressure high pressure carbon dioxide fire
extinguishing system should be 15MPa.
3.3.8 strength test, the network should be
purged. Purging pipe ends should ensure the flow of 20m/s when using checked
cloth until no rust, dirt, water stains and other booty appears qualified.
3.3.9 pipe network pressure test, after the
purge gas pressure leak test should be carried out, test pressure working
pressure regulator 3 minutes, pressure drop not greater than 10% qualified.
3.3.10 network volume not work when the
pressure is not high, strength testing, purging and nitrogen leak test should
be used.
3.4 equipment installed:
3.4.1 pharmacy cylinder installation:
cylinders transport protection measures need to be taken to prevent collisions,
bruises. Install the pressure gauge when the observation plane and the product
label should be facing out. Cylinders should be arranged in space comply with
the design requirements. Cylinder weight floor commitment fixed is generally
fixed a channel on the wall first, and cylinders with holding cards with
channel lock together. Hold card height should be around cylinders 2/3 and try
to avoid the sign. When the channel cannot be fixed on the wall, and also be a
framework for rooting in the ground.
3.4.2 set pipe installation: chemical
cylinders through the elbow joint, high pressure hose and nonreturn valve is
connected with the collecting pipe. Collecting pipe welding method should be
used, each product should be used before welding machine manufacturing,
galvanized after welding. When storing the pressure is not greater than 4.0MPa,
diameter not greater than 80mm, or threaded connection. Collecting pipe should
be located at least two reliable fixation. Ends of shall have a safety relief
valve.
3.4.3 select valve installation: select the
vent valve installed in the flow tube, when the installation height exceeds the
1.7m operational measures should be taken. Select valves with threaded
connections should be increased when a flanged interface. Select valve
installation should be a high degree of consensus.
3.4.4 valve drive installation:
3.4.4.1 valve drive device function is in a
protected area of fire opened the pharmacy when the cylinder container valves
and fire selector valve. Driving mode electromagnetic, pneumatic and mechanical
manual drive, and so on. Control mode of automatic, manual and emergency
braking.
3.4.4.2 electromagnetic drive device of the
electrical connection cable should be fixed fire extinguishing agent storage
containers, frame or wall fixing.
3.4.4.3 manual cable-drive unit includes:
protection box, cable box, pull handles, wire ropes and manual valves. Steel
wire ropes shall have a casing and internal and external corrosion protection.
Cable bend special pulley. Sleeve and protective case should be fixed firmly.
3.4.4.4 install objects when the
gravity-driven mechanical drive device, should ensure that the weight falls
trip no barrier, required for their journey should exceed the valve opening
stroke 25mm.
3.4.4.5 pneumatic actuators of nitrogen
bottles, copper pipe and pressure activated valve and so on. Nitrogen bottle
installation and the cylinder installation is basically the same, copper tubes
expanded mouths flaring Suo Mu connector parts connection. Copper tube should
be installed horizontal even vertical fixed support spacing and the parallel
conduit clip spacing should not exceed 0.6m, pressure tightness test shall be
performed after installation, test pressure shall not be less than the nitrogen
bottle storage in pressure regulator 5 minutes, not qualified.
3.4.5 pressure switch installation: the
pressure switch's role is to work in the system under pressure feedback
signals, usually in the collecting pipe tapered at the end of the installation,
or cones on the fitting connector wire installation.
3.4.6 nozzle nozzle towards open
specifications and open holes must meet the design requirements, special wrench
should be used during installation.
3.5 system commissioning and function of
acceptance:
3.5.1 gas fire extinguishing system is
installed according to the total number of protected area (less than 10 by 10
meter) simulated Jet test on 10%. Jet region should prepare protective
measures. Test results shall meet the design requirements.
3.5.2 halon fire extinguishing gas spray
should be simulated using nitrogen, nitrogen cylinder charging pressure shall
not be less than the pharmacy cylinder storage pressure, structures, models,
specifications and container should be the same number of 20% pharmacy bottle,
and shall not be less than l.
3.5.3 carbon dioxide fire extinguishing
system using carbon dioxide to simulate the Jet tests, test the number of
containers should be used for the protective District 10% of the total actual
use of chemical storage containers, and shall not be less than 1.
4 quality criteria
4.1 project:
System pressure test results must comply
with the design requirements. Completion must be done before the purge.
4.2 Basic project:
System pipe length and direction, rainfall
showerheads and nozzles must conform to the design requirements.
4.3 allowable deviation:
Sprinkler branch pipe fixation distance
between nozzle pipe length is not more than 500mm.
5 finished product protection
Installed gas cylinders room should have
professional management to prevent sprayed errors lead to false positives.
6 quality problems to be noticed
6.1 pipe galvanized pipe-cone bit bad
because pipe wrench old, caused by tight.
6.2 cylinder transport damage the coating.
Due to lack of protection measures.
7 quality standard
6-3 "indoor sprinkler system installation
standards."
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