NMW / NMWA

nmw_nmwa

NMW is a medium wall semi-rigid sleeving, available in black 1.2mtr unlined lengths, It comes in a range of sizes up to 230mm diameter. NMW is available in a shrink ratio of typically 3:1 and benefits from the wall thickness where wear resistance and mechanical strength are important.

It is also available with a hot melt adhesive lining NMWA, or with a mastic sealant NMWA(S). These combine the attributes of the unlined material with the benefit of the lining, making it the ideal solution to cable jointing and repairs, both above and below ground where it protects against ingress of moisture, salt water and chlorine attack.

Physical Properties

Shrink ratio Typically 3:1
Material Cross-linked polyolefin with respective lining where applicable
Flexibility Semi rigid
Colours Black
Tensile strength 14.0N/mm”
Ultimate elongation 300% min
Relative density 1.1 max.
Longitudinal change 10% max.

Thermal Properties

Operating temperature
range
-55°C to + 80°C
Shrinkage temperature >120°C
Storage stability Very good

Electrical Properties

Dielectric strength 20KV/mm
Volume resistivity 1014ohm.cm.

Chemical Properties

Water absorption 0.5% (24h at 25°C)
Corrosion Non-corrosive
Flammability Self-extinguishing
(tubing only)
PRODUCT
CODE
REF.
Internal
Diameter (mm)
Nominal
wall
thickness
(mm)
after heating
(full recovery)
Standard
reel size
(mtrs)
Expanded
As supplied
min.
Recovered
after heating
max.
NMW12/3 12.0 3.0 2.0 1.2
NMW20/6 20.0 6.0 2.0 1.2
NMW25/8 25.0 8.0 2.0 1.2
NMW30/10 30.0 10.0 2.0 1.2
NMW34/10 34.0 10.0 2.0 1.2
NMW40/12 40.0 12.0 2.0 1.2
NMW45/13 45.0 13.0 2.0 1.2
NMW54/18 54.0 18.0 2.0 1.2
NMW70/25 70.0 25.0 2.0 1.2
NMW90/30 90.0 30.0 2.4 1.2
NMW122/40 122.0 40.0 2.6 1.2
NMW170/58 170.0 58.0 2.8 1.2
NMW230/77 229.0 77.0 3.0 1.2**

* Please prefix the above numerical reference with NMWA for hot melt adhesive, and NMWA(S) for the mastic sealant.
** Non-standard size available on request.