DUOFLEX, DUOHARD protective pipes

DUOFLEX, DUOHARD protective pipes

Double-walled protective pipes (also called "corrugated pipes or "cable protection sleeves") are intended, primarlly, for mechanical protection of cables laid in excavations and cable trenches.

Generally, they are used for difficult section of cable routes such as, water courses, railway crossing, motorways.
The pipes provide additional protection of water and gas supply lines, drainage or sloped sewers.

Material

DUOHARD - outer and inner walls are made of HDPE
DUOFLEX - outer walls are made of HDPE, inner wall are made of LDPE+MDPE (for diameters of 40, 50 and 63 mm) or of HDPE (for diameters of 75 and 90 mm), or HDPE (for diameters from 110 mm)

Design

outer wall - corrugated for higher mechanical strength of the pip
inner wall - smooth (slight corrugation provides for excellent flexibility, does not reduce passage capacity through the pipe in bends and maintains high strength)

Colour

outer wall - red, black or blue (standard colours)
inner wall - black (standard)

outer diameter	inner diameter	DUOFLEX			DUOHARD
outer diameter	inner diameter	length coil	bend radius	pallets length	length rod	pallets length
mm	mm	m	m	m	m	m
40	32	50	0,20	1200	-	-
50	40	50	0,23	400	-	-
63	51	50	0,26	-	-	-
75	61	50	0,29	350	-	-
90	75	50	0,33	300	-	-
110	94	50	0,37	200	6	456
125	105	50	0,40	-	6	408
160	136	50	0,43	-	6	168
200	171	25	0,50	-	6	162

Heat resistance

handling temperature: of -5 ºC to + 50 ºC
operation temperature: of -40 ºC to +70 ºC
storage temperature: of -40 ºC to +60 ºC

Mechanical resistance

resistance to compression is min. 450 N / 200 mm (code 450)
impact resistance is normal (code N)

Pipe connection

using slide-on couplings

Drawing element and cable introduction

DUOFLEX protective pipes in coils (25, 50 m) have preinstalled drawing elements (PV-PAD, thickness 1,2 mm or PP string 12 500 dtex)
cables must be introduced into DUOFLEX and DUOHARD pipes via drawing (blowing-in not possible)
smooth inner walls provide for easy cable introduction into the pipe

Storage

coil be stored in horizontal position, maximum storage height 2,8 m
max. storage time up to 3 months
it is not recommended to store in direct sunlight (DN 40, 50, 63, 75 and 110 does not contain UV stabilizer. DN 90, 125, 160 and 200 contain UV stabilizer)
ambient conditions must comply with ETS 300 019-1-1, class 1.3E

Laying

observe relevant laws and technical standards when laying protective pipes for power and communication cables
in order to maintain maximum mechanical strength of DUOFLEX and DUOHARD protective pipes observe installation instructions issued by MATEICIUC a.s.
avoid too small bending radius and excessive force when installing connection and fitting devices and observe maximum allowed load
use appropriate protection of pipe ends when laying into soil in order to prevent dirt inside the pipe which could damage the cable
after introduction of the cable into the pipe seal both ends to prevent dirt from coming into the pipe
seal the ends of redundant pipe (if installed)