1 scope
The standard is suitable for civil and
industrial construction installation of indoor hydrant system pipeline.
2 construction preparation
2.1 the main materials:
2.1.1 fire hydrant pipe should be selected
according to the design requirements of the system, generally made of carbon
steel tube or seamless steel tube, pipe shall not be bent, rusting, leather and
rugged, and so on.
2.1.2 specifications type shall conform to
the design requirements for fire hydrant Cabinet, Cabinet flat, smooth surface.
Metal box no rust, scratches, the door is open and flexible. Box founder,
complete accessories inside the box. Plug valves-type rules, no cracks, opening
and close flexibly, shut tightly, packing intact, factory certificate.
2.2 the main machine: Threading machine,
wheel saws, bench drill, hammer, drill, hand wheel, electric drill, electric
welding machines, electric pressure pumps and other machinery. Silk panels,
pipe wrenches, vise, pressure clamps, chain pliers, hammer, hacksaw, wrenches,
nail guns, chains, electric welding and other tools.
2.3 operating conditions:
2.3.1 construction drawings and related
technical documentation should be complete, should meet the construction
requirements of water, electricity, gas, system can guarantee the normal
construction equipment and materials.
2.3.2 pipes and casing installation of the
required baseline shall be determined and marked. Reserved, embedded with the
construction completed.
3 operational processes
3.1 process:
Installation preparation – tube and
pipe installation box →
→ → water tank
fittings installed the debug
3.2 installation preparation:
3.2.1 earnestly familiarity with drawing
paper, combined with the situation properly review the position coordinates,
elevation of the pipe, if there is any problem, and designer solutions in a
timely manner, go through the negotiation procedures.
3.2.2 checking for reserved and embedded
correctly, interim pick your cut should be well coordinated with design build.
3.2.3 check equipment and materials with
the design requirements and quality standards.
3.2.4 reasonable construction order, avoid
types of crossover interference affecting construction.
3.3 pipe installation:
3.3.1 fire hydrant pipe installation
according to the design of the system requires the use of pipes, made of carbon
steel pipe or according to the pressure seamless steel pipe.
3.3.2 pipelines before welding seams should
be cleared of rust, dirt, and grease.
3.3.3 wall thickness ≤ 4mm,
diameter ≤ 50mm gas welding should be used; the wall thickness ≥ 4.5mm,
diameter is greater than 70mm the use of electric welding.
3.3.4 welded pipes with different
diameters, connections such as the two diameter difference of no more than
small diameter 15%, tip necking with large diameter and small tubes can be
welded. If 15% over the two pipes of small diameter and variable diameter tube
welded should be used.
Counterpart weld 3.3.5 the piping shall not
be open on welded tubes, welded joints shall be installed on the hanger
location.
3.3.6 duct through the wall must not have
interfaces; pipes through expansion joint-freezing measures.
3.3.7 staggered weld carbon steel tube
welding and weld towards the direction of observation and maintenance.
3.3.8 pipe welding spot welding first three
points above, and then check the reserved outlet position, direction, variable
diameter are correct, get straight alignment and welding, fastening cards,
removal of temporary fasteners.
Tube and box 3.4:
3.4.1 fire hydrant Cabinet should comply
with the design requirements (material such as wood, iron and aluminum), double
outlet plug valves have single outlet and dual controls. Product shall have the
Fire Department's manufacturing license and certificate to be used.
3.4.2 fire hydrant pipe plug valve
coordinates, elevation position dump, approved after a solid fire box, box is
solid, then installing hydrant valve, Hydrant valves mounted on one side of the
box should open the door, door open, be flexible.
3.4.3 fire hydrant cabinet installed on a
light wall reinforcement measures.
3.4.4 hydrant piping installing the
hydraulic test pressure specified by the design. Design without pressure to
General working under 1.0MPa, the test pressure for 1.4MPa. The working
pressure is 1MPa, pressure test pressure working pressure plus 0.4MPa, voltage
regulator for 30 minutes, no leakage is qualified. As part of decoration,
pressure test segment.
3.4.5 finished pipeline fire hydrant system
pressure test can be used to clean the work continuously and flushing pipes
shall meet the design requirements of water flow, water inlet and outlet water
line to end.
Box 3.5 accessory installation: prior to
completion. Fire hose should be folded in a hanging rack volume solid, tight
inside the box; fire water to stand inside the box, save-water guns and hoses
should be on the cards or on the bottom. Fire hoses and nozzles, quick coupler
connection, generally with the 14# wire-tying two, each less than two laps,
when using a clamp, added in a wire. Equipped with electronic control button,
be aware of construction in conjunction with electrical professional.
3.6 water debugging:
3.6.1 before commissioning of fire fighting
equipment, including water pumps, combined with devices, such as throttling
devices should be installed, finish single pump commissioning work.
3.6.2 system working pressure water, fire
hydrant experimented the most unfavourable point of the election system,
through a combination pump and fire pump pressure, spray pressure of a fire
hydrant shall meet the design requirements.
4 quality criteria
4.1 project:
Fire hydrant system pressure testing,
flushing must conform to the design and specifications.
4.2 Basic project:
Installation bolt facing out of the
box-type fire hydrants, valves from the ground, the size of the wall meets the
construction requirements. Hoses and fire hydrants and quick connector straps
tightly, and convolution, hanging on the tray or cradle.
4.3 allowable deviation:
Ground fire hydrant valve centre distance
1.2m, permissible deviations 20mm. Valve from the box sides 140mm, from the
inner surface of the tank is 100mm, permissible deviations 5mm.
5 finished product protection
Fire box accessories before installation,
construction site conditions should be protected. After the water system,
protective measures should be taken to prevent the touch running water, damaged
decoration products.
6 quality problems to be noticed
6.1 fire box door closed is not strict; as
the installation was not found in insufficient strength or door deformation.
6.2 fire hydrant valve closed lax: because
the pipeline is not flush, seat caused by debris.
7 quality records
613 "indoor sprinkler system
installation standards."
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