1 scope
This technology is applicable to General
lighting systems inside buildings, in concrete and brick-dark pipe laying (and
not laying in the places of high temperatures and the ceiling).
2 construction preparation
2.1 materials requirements:
2.1.1 where the use of flame-retarded (PVC)
plastic pipe, the material should have a flame retardant, impact resistance,
flame retardant indicator of its oxygen should not be less than 27%, and
verification reports, and product certification.
2.1.2 fire retardant plastic, continuous
flame retardant outer wall should be spaced not more than 1M marks and factory
mark, it tube inside should be smooth, no ridges, dents, pinhole, bubble; inner
and outer diameter should be in line with national standards, tube wall
thickness should be uniform.
2.1.3 fire retardant plastic attachments
and dark flame retarded plastics products, such as lamp, switch boxes, junction
boxes and socket boxes, end fittings, pipe clamps and other, you must use the
fire retardant plastic products.
2.1.4 flame retardant plastic conduit
Circular box, switch boxes, junction boxes, and appearance should be neat and
complete opening, no splitting damage and so on.
2.1.5 supplementary material: galvanized
iron wire, special bonding agent.
2.2 the main tools:
2.2.1 pencil, tape measure, tape measure,
ruler, wire pendant, small line, the level of scale.
2.2.2 hammer, chisel, and hacksaw, saw
blade, saw blade, semi-circular files, wrenches, and buckets, ash bucket, ash
shovel.
2.2.3 pipe spring (bending springs for
short), cut pipe, hand drill, bench drill, drills and pressure case.
2.2.4 electric hammer, air heater, electric
stoves, Hole saws, insulating gloves, tool bags, tool box, simmering tubes,
high stools.
2.3 operating conditions:
2.3.1 coordination construction of masonry
(brick plus gas, slag brick) construction, according to the electrical design
requirements and civil eject horizontal line on the wall, installing pipes and
box.
When civil concrete structures 2.3.2,
templates, sliding formwork in reinforcement concrete walls, in the process,
embedded box set and pipe according to design requirements, while the hidden
check formalities.
2.3.3 aerated concrete floor slab, plate
with a circular hole, should cooperate with civil engineering when you adjust
the lifting floor joints and pipes according to the design.
3 operational processes
3.1 process:
Line positioning → processing
pipe concealed piping →
→ → steady note
box Gordon strip line
3.2 line location:
3.2.1 according to design requirements,
brick walls, large-formwork for concrete wall, sliding formwork for concrete
walls, wood, combined steel formwork of concrete wall formwork for concrete
walls to determine line positioning box, bin location, press the eject
horizontal with small lines and box level measured, accurate position and mark
the dimensions box.
3.2.2 design light requirements in aerated
concrete panels, precast plate with a circular hole (mat or in a hole
underground pipes), cast in place concrete floor slabs, precast thin on a
concrete floor, after measuring, marking exactly where the lamp holder
cartridge dimensions.
3.2.3 all partitions tick steady grooves
buried switching boxes line. According to the design requirements, brick, foam
concrete walls, slag brick walls of plaster plate walls, reefs, etc, need
steady buried switching boxes, measurement determines the switch box dimensions
accurately.
3.3 processing pipe bending:
Preformed pipe bending cold simmer method
and heating method can be used.
3.3.1 environmental temperature of the
flame retardant plastic pipe laying and simmering bending requirements are as
follows: the laying of fire-retardant Plastics pipes and fittings, installation
and simmering bending production, should be carried out on raw materials for
the permissible ambient temperature, the temperature should not be less than-15
degrees.
3.3.2 cold simmer method:
Diameter in the 25mm and the following cold
simmer method can be used.
3.3.2.1 broken pipe: small-diameter
pipe-cut can be used, large diameter using a hacksaw cut pipe fracture file,
milling.
3.3.2.2 knee simmering bending: bending
spring (referred to as insert PVC pipe bending Springs needs to simmer bend
hands hold on to both ends of the pipe, top it with a hand on his knee,
progressive curvature required to simmer, then taking the bending spring (when
bending when longer pipes, galvanized iron wire bending springs can be tied in
order to pull the bent Springs).
3.3.2.3 use lever bent tube simmering
bending, tube insert supporting pipe Bender, hand a simmering the required
curvature, as shown 3-1 shown in Figure 3-l.
3.3.3 heating method:
Electric stove, hot, heats evenly, bake
simmer bend of the pipe until the pipe is heated to optionally bending, pipe
placed on the Board immediately, fixing pipes, gradually simmer the pipe bend
required, wipe with a damp cloth to cool curve shape, and bending springs. Not
due to roast simmer bend the pipe damage, discoloration, cracking phenomenon.
3.4 stable box, box:
3.4.1 box, box fixed should participate
equally firm and mortar full undertones and flat, vertical and horizontal
coordinates accurate, consistent with the design and construction and
acceptance specification.
3.4.2 brick stable box, box:
3.4.2.1 reservation box, bin bolts:
according to the designs of boxes, cartons reserve location, along with the
construction of masonry coordinating construction electrician, set aside at the
300mm into the box, boxes of pipe length, the dump tubes outside the box, box
reserved hole, it tube end plug well, waiting for the last one hole into the
box, box buried stabilization is completed.
3.4.2.2 tick box hole stability, box,
followed by a short pipe:
Press the eject horizontal lines, control
design to find out exactly where the boxes, cartons, picking holes, played the
hole should be slightly larger than the box, box. Tick after the first water
wet cave walls, and clean up the debris in the hole. In accordance with the
line to knock off the knockouts of the box, then use high grade cement mortar
to fill the hole box, box upright stability until the mortar solidified,
followed by short pipe into the box, the box.
3.4.2.3 combined steel formwork, formwork
of concrete wall stable box, box:
A hole in the template, the box, box is
fixed with screws on the template; will be fixed in a timely manner before the
removal boxes, boxes of screws removed.
B wear reinforced boxes, fixed directly on
the bars, and wall thickness of welding support bars, box or box flush with the
wall surface.
3.4.2.4 stability of the sliding formwork
for concrete wall box, box:
A reserved box, box hole, take the next box
set, box set, then sliding the template after removing box set box set, while
stable box or enclosure.
B the box, box is fixed with screws on a
flat iron, and then flat iron welding on steel, or directly with the wear bars
fixed on the steel and wall thickness of welding support bars, make boxes flat
flush with the wall surface.
3.4.2.5 buried conduit Circular box roof
stability:
Stable aerated concrete panels, a plate
with a circular hole buried conduit Circular box. According to the design
drawings indicate position of lamp size, punch, and then picking from the
bottom up, the hole small Shang da. Will be matched with the corresponding
fixing body into the hole in the box, and fixed the hanger plate, wait for the
pipe made of high grade cement mortar buried solid stabilization.
B in-situ concrete floor slab, need to
install ceiling fans, lanterns or lifting fixture for more than 3kg, the
embedded hooks or bolts, suspension torque should guarantee the carrying
capacity and safety.
C wall stability buried switching boxes,
electrical outlet box. As in the brick walls of foam concrete walls, pick your
slot should be on each side of tank before the first line, channel width and
depth should be larger than the outer diameter of the tube, slotted with depth
greater than 1.5 times the width times the outer diameter of the tube. Brick
chisel to tick along the Groove side grooves; foamed concrete after available
saw blade into slots on either side of the wall, then tick into the slot.
Pick your slot should be stable box, then
took over, pipe galvanized wire around every 1M fixed lines, finally plastered
and smoothed together. When gypsum plate with a circular hole, appropriate to
pipe into the hole and the apply to box or the box office.
3.5 concealed piping:
3.5.1 connection:
3.5.1.1 the pipeline even takes using a
hoop connection (including end fittings to take over). Brush touch supply
plastic adhesive evenly on the outside wall, insert the tube jackets; tube
should be in place. Within 1min of adhesive bonding performance requirements do
not shift, adhesive holding long, and waterproof.
3.5.1.2 pipes laid vertically or
horizontally, every 1M from a fixed point, in the bending area should begin
with the arc center point 300~500mm plus a fixed point at both ends.
3.5.1.3 tube into the box, the box, a tube
of a hole, end fittings and lock in a fixed box, box, tube top-hat designer
well plugging holes mouthpiece, using paper or foam block plug box (plug box
materials can be based on existing soft objects, such as cement paper bags,
etc).
3.5.2 line dark laying:
3.5.2.1 dark laying the pipeline within the
concrete wall panels:
Pipeline should laying in two layer steel
middle, tube into box, box Shi should simmering into lamp fork bent, pipeline
each across 1M at with plating zinc wire lashing prison, bent parts by
requirements fixed, to Shang introduction tube should not be had long, to can
simmering bent for associate, to wall introduced tube can using "tube
Cap" reserved tube mouth, stay split die Hou out "tube Cap"
again took over.
3.5.2.2 the slippery rise template laying
pipe, light tubes can lead to bracket the wall, sliding after a good roof,
laying pipe to the light again.
3.5.2.3 in-situ concrete floor slab dark
laying the pipeline:
According to the thickness of the wall
around the room, playing the cross line determines where the conduit Circular
box, end fittings, internal lock on the fixing holes in the box, using a good
Hat Designer plug nozzle and blocked good box, fixed the box, use machine
screws or steel bars fixed on the bars at the end of it. With enough pipe, pipe
should be laid on top of the arch rib of the following bar at the end of pipe
galvanized wire binding every 1M in prison. To the partition walls of the
pipes, you can use "caps" reserve tube, stripping out caps to take
over.
3.5.2.4 precast thin dark laying concrete
pipe:
Decide on a lamp box location, power hammer
in the top hole first, and then in the following reaming, hole size should be
outside the box a little bigger. Use high-piled boxes installed on Katie (car)
will end fittings, lock in hole tube fixed to the box, and high-piled boxes of
mortar buried, and then laying pipes. Pipe layer should be not less than 80mm.
3.5.2.5 dark laying precast plate with a circular
hole in the pipeline:
Electrician in time to meet the civil
lifting plate with a circular hole, laying of pipelines. When the lifting plate
with a circular hole, looking for the light position size, light-box hole, then
laid pipes. Plate from the plate with a circular hole holes at one end of the
tube into the boxes to lamp caps and tube fixed to the lamp box, and drop box,
iron with good position and fixed with cement mortar box.
3.5.2.6 grey dark laying the pipeline in
the soil:
Dig pipe Groove after lime soil compaction,
laying pipe, and then buried concrete mortar above the Pipeline Designer,
thickness should not be less than 80mm.
3.6 and tube lines:
For concrete structures, such as walls,
floors should be carried out promptly and so Kwun Wat, with the removal of
mould with Gordon that the ability to detect blocked tubes impassability, easy
to handle because when no final set in concrete, repairing the pipeline.
For brick-concrete structure wall, in front
of the plaster and so Kwun Wat, when there is a problem to modify pipeline,
¡ñall-repair. After Gordon confirmed the pipeline flow, put on line in a timely
manner, and tube, box, box blocking well, strengthen the finished pipe
protection, prevent secondary blocking the pipeline.
4 quality criteria
4.1 project:
Flame retardant plastics pipe and the
attachment material oxygen index should reach more than 27% performance
indicators. Flame retardant plastic pipe shall not be outdoors in high
temperatures and mechanical damage-prone places laid out.
Inspection method: check the testing data,
Visual check.
4.2 Basic project:
4.2.1 connection close tube smooth, cover
over 15mm, Compact connection, use adhesive firmly.
4.2.2 box, box is set up correctly,
reliable and pipes into the box, the box straight, a hole in a tube, to end
connector with lock fixed the tubes in the box, box tube hole, strong and not
loose.
4.2.3 pipeline should satisfy the following
requirements:
Through the deformation joints compensator,
compensator can move freely through buildings and equipment base, should
protect pipe compensator smooth, pipe smooth, lock and reliable connection of
the pipe, plus protection pipe concealed works record label is correct.
Inspection method: Visual check, check for
hidden works records
4.3 allowable deviation:
Rigid PVC pipes, bending radius
installation allowable deviation and testing method, see 3-l in table 3-3
below.
5 finished product protection
5.1 when you pick your slot holes, should
be ready in advance, avoiding violently tick cause holes or slots tick too big,
too wide, or even affect the quality of civil engineering structures.
5.2 tube after the finished product
protection, especially in the in-situ concrete structure construction,
electricians tie in closely related to the construction, at the time of
collection mode and split mode, to protect the pipeline do not shift, smashed
or damaged appeared.
5.3 in the concrete, aerated when picking
holes in the plate, be careful not to tick off bar, tick should be used when
drilling the hole drilling, reaming, not allowed to use a sledgehammer touch
from above the hole.
When civil engineering concrete 5.4, should
send an electrician nursing to prevent pipe displacement or against mechanical
damage.
6 quality problems to be noticed
6.1 layer <15mm pipe are exposed, it
tube groove depth should be picking up to 1.5 times the depth times the outer
diameter of the tube and fasten the tube later use erase protect and ash layer
of cement mortar.
6.2 stable box, box has skewed; cassette,
box recessed, the phenomenon of convex walls; box, box break; coordinates
outside the allowed deviation. For stable box, box, you should use the line
first was buried, coordinates the correct fixation of unstable; a concealed box
or boxes should be flush with the wall, not the phenomenon of convex wall.
Obscura post face and the wall gap reserve; filling around the bottom of the
box with a cement mortar trowel, shut the box formation.
6.3 due to wall thickness is thin, box
almost the same wall thickness and thickness, plastering cracks at the bottom,
with metal mesh at the bottom fixed, plastering leveling together again.
6.4 concave flat tube simmering bending
over and bend radius of less than 6D (d pipe diameter). Simmer bend should
operate according to the requirements of the bending radius should be larger
than 6D.
6.5 line doesn't make sense, it tube is not
blocked on a good jam, causing debris falling into the tube. Standpipe when it
should, feel free to block good jam, other types of work, should be careful not
to break has finished laying the pipeline to avoid pipe blocked.
6.6 fire to simmer for PVC pipe bending,
prone to roast concave flat color, multiples, simmer bend enough and so on. So
when you use heating bend, care should be taken to avoid these problems.
7 quality records
7.1 flame retardant type (PVC) plastic pipe
and accessories, test reports and product certification.
7.2 rigid flame retardant plastic dark
installation, should conduct technical disclosure, pre-screening, hidden
inspection, checking and cross-checking records.
7.3 change record of negotiation and
completion.
7.4 project for quality inspection and
assessment records.
No comments:
Post a Comment