Install Instructions

Viega IM-MTL 0612
724607
18
8. PROPRESS STAINLESS PIPE AND FITTINGS 1/2" - 4"
8.1 Viega Press Systems Pipes
Only Viega ProPress Stainless piping is
approved for installation with ProPress
Stainless. This is to ensure reliability
and conformity with the stainless steel
system. ProPress Stainless pipe comes
in sizes 1/2" – 4".
General
Viega ProPress Stainless pipes are
thicker than schedule 5, inert gas
welded pipes, meeting ASTM A312
and DIN 1988.
Delivery Condition
All dimensions of pipe are delivered
in sticks that are nominal 20 ft. in
length, with a metallic bare exterior and
interior surface. The pipes are free from
annealing color, corrosion promoting
substances and hygienically questionable
substances.
All pipes have been tested for leaks.
The pipes are subject to continuous
monitoring, as well as external
monitoring by the material testing office.
Viega ProPress Stainless
pipes offer
these advantages:
• Form-stable
• Prevent fire as no soldering or welding
device is required for
installation
• Press fitted in seconds
• Low in linear expansion due to heating.
Identification
Viega ProPress Stainless pipes are
marked and labeled with the following
information along their entire length:
1. System vendor/system name
2. Test marks and approval marks
3. Material number in accordance with
DIN specifications
4. Pipe diameter x wall thickness
5. Manufacturing type g =
inert gas welded
6. Pipe manufacturer abbreviation
7. Manufacturing date
8. Lot or reel number
8.2 Handling Instructions
ProPress Stainless components shall
be free from dirt, debris, scaling, or
items that may interfere with the sealing
element and the press connection.
ProPress Stainless sealing elements
are to be visually inspected prior to
installation to ensure the seal is intact
and properly located within the fitting.
8.3 Welding Near ProPress
Stainless Fittings
When welding near a ProPress
Stainless connection, the installer must
remain at least three feet away from
the connection to prevent damage
to the sealing element. If three feet is
not possible, the installer should take
precautions to keep the ProPress
Stainless connection cool while welding.
These include:
• Wrapping the connection with a cold
wet rag
• Fabricating welded connections prior
to installing the pressed fitting making
sure the pipe has cooled before
installing the fitting
• Consistently applying “spray type"
spot freezing
8.4 Rotating a Pressed Fitting
Once a ProPress Stainless fitting
has been pressed it can be rotated
(not by hand), but once rotated more
than five degrees, the fitting must be
repressed to restore the resistance to
rotational movement.
8.5 Codes and Approvals
NSF-61 Annex G
American Bureau of Shipping
United States Coast Guard
Lloyd’s Register
Det Norske Veritas
1 System vendor/system name
2 Test marks and approval marks
3 Material number in accordance with DIN
6 Pipe manufacturer abbreviation
7 Manufacturing date
8 Lot or reel number
Identification of ProPress Stainless
4 Pipe width exterior diameter x wall
thickness
5 Manufacturing type g = inert gas welded