Silane cross-linked polyethylene pipe INTERSOL ... - Watts Industries

SILANE CROSS-LINKED POLYETHYLENE PIPE
12 - APPROVALS FOR INTERSOL ® PEX-b
As the pipe manufacturing system is certified to ISO 9002, there are certain receiving, in-process and final
test/inspection procedures, as already mentioned previously. Consequently all INTERSOL ® PEX-b pipes are
submitted to in-house final testing, in accordance with the requirements of European standards in the sector,
which differ according to the country of destination (e.g. UNI 9338/9349, DIN 16892/16893, DIN 4726/4729, UNE
53-381-89/53-023-86-53133-82, see previous table). Furthermore there are various product certifications,
entrusted to officially recognized testing body which can be summed up as follows:
17
Table 15
Country Approval Body Floor heating Plumbing Main captions
ITALY I I P – Istituto Italiano Plastici X X UNI 315 IIP 206
GERMANY SKZ X X DIN GEPRUEFT
Süddeutsche (only chemical (only chemical DIN 4726
Kunstoff Zentrum physical tests) physical tests) DIN 16892
DIN 4726
DIN 16892
GERMANY DVGW - Igiene Institut X DVGW
(migration) DW 8306 AL 2002
GERMANY MPA - NRW X Diffusionsdicht
Materialprufungsamt
(oxygen
Nord-RheinWstfalen
diffusion)
FRANCE C.S.T.B. Centre Scientifique et X X
Technique du Batiment
PORTUGAL LNCE National Civil Engineering X X
Laboratory
HUNGARY EMI - TÜV X X
Hungarian Section of German TÜV
SPAIN AENOR Spanish Standards Institute X X
U.S.A. NSF International X X Standard 14
Body Certification
product standard
ASTM F876-877,
included chlorine,
CSA 137.5.
Standard 61
13 - COMPARISON OF DFFERENT PLASTICS USED IN HOT WATER PIPING
Table 16 shows different behaviours of cross-linked polyethylene (PEX), polybutylene (PB) and polypropylene
random copolymer (PP/R) materials with reference to certain important properties for applications in the heating
and plumbing industries.
Table 16
Property PEX PP-R PN
Stability in hot water (95°C) A C B
Long-term behaviour (up to 95°C) A C B
Flexibility A B A
Impact strength (also at low temperatures) A C B
Elongation (longitudinal tensile test) C B C
Toxicity A A A
Creep properties A C B
Thermal conductivity B B B
Surface A A A
A = very good B = good C = sufficient