General Rules And Precautions - PREVOST PPS Manuel Technique

GB
ANCHORING METHOD
Pipe clamps and anchoring systems must be selected with great care. They
must have a number of features:
Clamps should firmly anchor pipes to structures in the room;
They must neither scratch nor mar pipes in any way;
They must provide enough space between pipe work and walls
or other obstacles to allow maintenance and other work;
They must hold pipes perfectly straight and be able to support
the weight of accessories and loaded pipes by fastening them
to each anchoring point;
Be especially careful when fastening accessories and valves,
which open and close. They should not be anchored to pipes
and be fastened such that they can operate and be removed.
Take particular care when anchoring pipe ends (caps, wall
brackets, downpipes).
The aluminium pipes don't ensure the supporting of additional
elements (filters, water separators, valves...). Wall brackets are
provided for this purpose.
ASSEMBLY: GENERAL RULES AND PRECAUTIONS
WARNING : Carefully follow
A poorly designed ring main could create a safety hazard. Observe the following precautions :
Ringmains in diameter must be installed by a professional
•
• The networks must be as straight as possible so as to avoid pressure drops and a multiplication of the opposing forces (complicated runs with a large number of elbows,
tees, etc., should be avoided).
• Flexible expansion (or connection) hoses with swivel couplings must be installed on all straight runs over 50 metres long in order to:
- facilitate assembly of the network (much shorter installation time)
- protect the systems by absorbing and dissipating forces (expansion and retraction)
• Fit one fixed clamp every 20 metres and at least one of each ring main to fasten it securely to the building wall.
• Cut pipes cleanly to avoid any strain on the components
CUT THE PIPE
1
Cuts must be straight and perpendicular to the axis of the tube. A maximum
of 7° in relation to the ideal theoretical plane of 90° is tolerated for cuts.
Use an " PPS CTU " pipe cutter.
W
arning: To re a proper seal, make sure all ends are smooth and
free of scratches, impacts or ovalisation.
the instructions given when choosing the type of ring main to be installed.
When spacing clamps, use the distances given in standard charts calculated
according to the diameter, temperature and weight of the particular utility
being conveyed.
Sliding clamps must not come into contact with connections or other
accessories so that the pipe can continue to move freely.
When installing pipes horizontally or vertically at less than 2.50 m above
the floor, double the number of clamps to make sure that the pipes are
firmly anchored to the structure.
DISTANCES BETWEEN CLAMPS
Diameter
16
20
32
40
50
63
80
CHAMFER - BURR
2
Burr the inside of the pipe. Make sure to bevel the outside end of the pipe
(Z = half the pipe's thickness).
≤ 7°
Diameter
16 to 50mm
63 to 80mm
Ensure that the quality of the chamfer is good and that there is no
chip inside.
11
Space between
Clamps
clamps at 30 °C
PPS1 CI16 3
PPS1 CI20 3
PPS1 CI32 3
PPS1 CI40 4
PPS1 CI50 4
PPS1 CI63 4
PPS1 CI80 4
Bevelling tools
PPS CH50
PPS CH110