1 scope
This technology is applicable to indoor or
acid and alkali corrosive lighting wiring installation installation (not above
40 c in places vulnerable to mechanical impact, friction collision and other
places laying).
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. Pipe miles away 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 use flame retardant plastic
attachments and flame retarded plastics products, such as lamp box, switch
boxes, junction boxes and socket boxes, pipe straps, you must use the fire
retardant plastic products.
2.1.4 adhesive must be used with flame
retardant plastic pipe accessory products, adhesive must be used within a
specified period is used.
2.2 the main tools:
2.2.1 ruler, tape measure, pencil, tape
measure, level gauge rod, square, wire pendant, small line, pink bags.
2.2.2 hammer, chisel, and hacksaw, saw
blade, knives, cabinet file, live spanner, ash bucket, bucket, etc.
2.2.3 pipe spring (bending springs for
short), pipe-cutting, hand drill, bench drill, drills and pressure case.
2.2.4 electric hammer, air heater, electric
stoves, Hole saws, insulating gloves, tool bags, toolboxes, pipe-simmer, high
stools.
2.3 operating conditions:
2.3.1 when mixing concrete structure
construction, according to the design drawings in beam and plate, under the
column tube and pipe.
When construction of the brick structure
2.3.2, embed a large pipe, angle steel bracket and tube.
2.3.3 in the renovation before the
construction level and thickness of the plastering and piping, line casting
according to design embedded parts and stability with angle brackets.
2.3.4 spraying is complete, installation
for piping and all kinds of cartridges, boxes, and prevention of pollution from
pipelines.
3 operational processes
3.1 process:
Prefabricated, and hangers iron
determination of box and pipe and tube bending → → → fixed point
position of fixed line
Pipeline laying pipe into the box → → deformation joint
practice
3.2 in accordance with design machined
bracket, hanger, anchor, iron castings and pipe bends.
Preformed pipe bending cold simmer method
and heating method can be used.
3.2.1 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, temperature is not lower than-15 degrees
centigrade.
3.2.2 cold simmer method:
Diameter in the 25mm and the following cold
simmer method can be used.
3.2.2.1 use lever bent tube simmering
bending, tube insert supporting pipe Bender, needed for the lever a simmering
curves shown in Figure 3-l.
3.2.2.2 insert the bending spring (PVC)
tubes need to simmer bend, his hands gripping bend both ends of the spring
head, knee bend, camber lever gradually simmer required, and bending springs
(when bending a long tube, bending springs with wire or nylon line can be tied
on one end, simmering bending when you are finished taking).
3.2.2.3 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.
3.3 determination of boxes, cartons and
fixed line point location:
3.3.1 measured in accordance with design
drawings, such as boxes, cartons, and outlet position. When measuring, use
homemade gauge rod, line positioning.
3.3.2 under boxes, boxes for the
determination of position, vertical lines horizontal lines pop up, mark the
bracket according to the request, hangers fixing points size.
3.4 fixed line method:
3.4.1 tube method: first punch holes in the
wall, the tube into the hole, again with screws (bolts) fixing.
3.4.2 method of wooden bricks: using wood
screws directly to the embedded on the wooden block.
3.4.3 embedded iron welding method: with
the civil construction, according to the determination of position of embedded
iron parts. After stripping, brackets, hangers welded on the embedded iron
parts.
3.4.4 stability methods: with construction
brick masonry, the bracket is secured.
3.4.5 the stability methods: built with
masonry walls, the bracket is secured.
3.4.6 tick methods: according to the
determination of position, remove wall (port should be picking bigger inside
the cave), wet hole with water, then up high-grade mortar to fill the hole,
after the brackets, and hanger or bolt into the hole in the correction of
buried deep and straight, is correct, erase the hole.
3.4.7 clamp method: according to the determination
of position, when it encounters a beam, full collar, hanging the bracket is
secured.
3.4.8 regardless of the method, should be
both fixed bracket, hanger, bracket, then pull the line fixed the Middle
hanger.
3.5 tube:
3.5.1 broken pipe: small-diameter pipe-cut
can be used, large diameter using a hacksaw cut flush nozzle file after the
fracture.
3.5.2 application tube, first pipe clamp at
one end of the screws (bolts) tightening by half and conduit inside a pipe
clamp, tighten one by one.
3.5.3 brackets, and hanger is correctly
positioned, evenly spaced, solid tube kayingping; buried bracket dovetail,
embedding depth shall be not less than 120mm bolted through the wall is fixed,
add washers and springs behind pad nut is tight and firm.
3.5.4 pipe laying, height shall be not less
than 2000mm; vertical installation, not less than 1500mm (1500mm protection
pipe should be added).
3.5.5 when a longer pipe laying, when they
exceed the following, should be added to the junction box;
3.5.5.1 line when there is no bending, 30m;
3.5.5.2 pipes have a turn, 20m;
3.5.5.3 pipeline when there are two curved,
15m;
3.5.5.4 pipeline has three corners, 8M;
3.5.5.5 cannot be installed at the junction
box, tube diameter should be increased first.
3.5.6 brackets, hangers and laying pipe
clamp fixed on the wall dots and boxes, boxes from the edge of 150~300mm, pipe
middle distance shown in table 3-1.
3.5.7 wiring and piping between the minimum
distances shown in table 3-2.
3.5.8 piping connections:
3.5.8.1 pipe should be smooth; pipes with
pipes, tubes and boxes (boxes) and other devices should be connected by the
Insert method, surface should be coated with special rubber mixture at the
connection, the interface should be firmly sealed.
3.5.8.2 when used between tube and tube
cuff, sleeve length straight to 1.5~3 times the tube diameter; pipes and tubes
Counterparts should be located in the
casing on the flat.
3.5.8.3 tube and device connections, depth
appropriate to 1.1~1.8 times the pipe diameter.
3.5.9 tube:
3.5.9.1 pipes and brackets, hangers should
be mounted straight, strong, neat, pipe bends, no significant creasing, concave
flat.
3.5.9.2 bend RADIUS and bend the flat shall
conform to the specifications.
3.5.10 straight tube should be installed
every 30m compensator, compensator joint head with straight sets in and glued
at one end (PVC) section head and glued on the tube, and then the small end
into the clamping ring, small end can slide inside the ring. Compensator
installation diagram. As shown in Figure 3-2.
3.5.11 (PVC) pipe leads to the ground, you
can use a section of pipe leads, but the need to make the appropriate
transition-specific coupling, coupling embedded in the concrete and steel pipe,
steel pipe casing grounding or the zero connection protection. (PVC) pipe and
pipe connection as shown in Figure 3-3.
And brackets, and hanger should be
straight, strong, neat; pipe bends, no significant creasing, concave flat.
4.2.2 box, box is set up correctly,
reliable, it tube box, the box, apply adhesive, adhesive tight and firm when
end connector with lock, tighten the cartridge wall is not loose.
Inspection method: observation and standard
checks.
4.2.3 pipeline should satisfy the following
requirements:
Through the deformation joints compensator,
compensator can move freely through buildings and equipment, should protect
pipe compensator smooth, pipe smooth, lock and reliable connection of the pipe;
and protection pipe correctly marked in a hidden project records.
Inspection method: observation on concealed
works of checking and inspection records.
4.3 allowable deviation:
Hard (PVC) plastic pipe bending radius
installation tolerances and testing methods should be consistent with table
3-3.
5 finished product protection
5.1 laying pipe, keeping the walls,
ceiling, floors clean complete. Repair iron paint, not contaminated buildings.
5.1.1 construction when the stool is used,
not the collision wall, corner, door, window but not state high stools against
the wall; high stool foot Binder, scratch-resistant flooring, anti slip.
5.1.2 handling objects and equipment
without crushing lines and boxes, cartons.
6 quality problems to be noticed
6.1 set of hoops, looseness, plug in place,
adhesive which could have uneven, small brush evenly supporting the supply of
adhesive inserts turn the insert in place.
6.2 when simmered with large diameter bend,
with a concave flat and roast injury, discoloration, cracks. Baked baking area
is small, uneven heating should be sand furnace indirectly grilled or baked
with water. Larger area, heat should be uniform, and there is a simmering.
6.3 pipeline laying there are vertical and
horizontal overload and unbalanced, it tube cards uneven spacing. Fixed pipe
clamp without cable, resulting in horizontal error; error measurements using a
tape measure, use a spirit level to review, always point level, then line fixed
pipe clamps, fixed up the final two points, the Middle pipe clamp, select
products, and measured with a gauge Rod pipe clamp fixed height.
7 quality records
7.1 flame retardant type (PVC) plastic pipe
and accessories test reports and product certification.
7.2 rigid flame retardant plastic tubes
laid out pre-inspection, self-inspection, mutual inspection records.
7.3 change record of negotiation and completion.
7.4 project for quality inspection and
assessment records.
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