Install Instructions

IM-MP 724992 1014
12
3.6.9 Pipe hangers
Hangers and supports must conform to the
requirementsofANSI/MSSSP58,PipeHangers
and Supports, Materials, Design, Manufacture,
Selection, Application and Installation. Supports,
hangers and anchors are to be installed in a
manner that does not interfere with the free
expansion and contraction of the piping.
All parts of the support equipment need to be
designed and installed to not disengage due to
movement of the supported piping. Sliding hangers
must be positioned so that they cannot unintentionally
become rigid hangers when the system is in use. See
Fig. 3.9. Fig. 3.10 shows a sliding piping hanger that
becomes a rigid hanger with spacing in excess of 10".
Pipe Size
(in)
Steel Pipe Max. Span
(ft)
Min. Rod Diameter
(in)
½ - ¾ 6 ⅜
¾ - 1 8 ⅜
1¼ - 2 10 ⅜
Table 3.9 Hanger Spacing
3.7 Viega MegaPress installation requirements
The following are special requirements to consider
when installing the Viega MegaPress fitting system.
3.7.1 Rotating a pressed fitting
Once a Viega MegaPress fitting has been pressed, it
can be rotated (not by hand), but once rotated more
than five degrees, the fitting must be re-pressed to
restore the resistance to rotational movement.
3.7.2 Deflection
When pressing Viega MegaPress fittings in a
system, the deformation of the fitting is constant.
This allows for a consistent leak-free joint every
time and is a result of the pressing technique.
The pressing process can cause deflection
(angular misalignment) to occur. Deflection
while pressing can be corrected by alternating
the position of the press tool on each fitting
connection. An example would be placing the
press tool on the right side of the first press
connection and alternating to the left side of the
press fitting on the second connection.
While deflection cannot be completely eliminated,
it can be minimized using this method.
3.8 Identification
All Viega MegaPress black iron piping systems
should be continuously marked in accordance with
ANSI A13.1 or as required by the local authority
having jurisdiction.
Figure 3.9 Spacing for sliding pipe hanger
Figure 3.10 Spacing for sliding pipe hanger