CEA 4001 - Pipe Supports

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through the drain valve at the control valve set, extra valves shall be fitted in accordance with 13.4.
In the case of dry, alternate and pre-action installations range pipes shall have a slope
towards the distribution pipe of at least 0,4 % and distribution pipes shall have a slope towards
the appropriate drain valve of at least 0,2%.
Range pipes shall only be connected to the side or top of distribution pipes.
15.2 Pipe supports
15.2.1 General
Pipe supports shall be fixed directly to the building or, if necessary, to machines, storage racks or
other structures. They shall not be used to support any other installations. They shall be of the
adjustable type in order to secure an even load bearing capability. Supports shall completely surround
the pipe and shall not be welded to the pipe or fittings.
The part of the structure to which the supports are secured shall be capable of supporting the
pipework (see Table 28). Pipes greater than 50mm diameter should not be supported from corrugated
steel sheet or aerate concrete slabs.
Distribution pipes and risers shall have a suitable number of fixed points to take account of axial
forces. No part of any support shall be made of combustible material. Nails shall not be used.
Supports for copper pipes shall be provided with a suitable lining with sufficient electrical resistance,
in order to prevent contact corrosion.
15.2.2 Spacing and location
Supports shall generally be spaced no more than 4m apart on steel pipe and 2m apart on copper
pipe. For pipes of over 50mm diameter these distances may be increased by 50% provided that one
of the following conditions is met:
- 2 independent supports are fitted directly to the structure;
- a support is used which is capable of bearing a load 50% greater than that called for in Table
28. When mechanical pipe joints are used:
- there shall be at least one support within lm of each joint;
- there shall be at least one support on each pipe section.
The distance from any terminal sprinkler to a support shall not exceed:
- 0,9m for 25mm diameter piping;
- 1,2m for piping greater than 25mm diameter.
The distance from any upright sprinkler to a support shall not be less than
0,15m. Vertical pipes shall have additional supports in the following cases:
- pipes more than 2m long;
- pipes more than lm long feeding single sprinklers.
The following pipes need not be separately supported unless they are at a low level or otherwise