Danfoss FH PEXa Pipes Data sheet

Data Sheet

FH PEXa Pipes

Application

The Danfoss PEXa pipe is a high quality floor heating pipe with an EVOH oxygen barrier. All layers are permanently bonded with each other during the production process.

PEX-a (peroxide) pipes give greater flexibility than

PEX pipes cross-linked by other systems.

They can be cold bent and curved very easily and without special tools, saving joints and installation time.

The EVOH oxygen anti-diffusion barrier is a thin layer of ethylene vinyl alcohol copolymer which prevents permeability of the pipe to oxygen diffusion. This construction eliminates problems with addition of oxygen to the flow water and the resulting corrosion of metal parts in the installation, extending the working life of the whole installation.

5-layer piping made of cross-linked polyethylene and produced by the peroxide method, with oxygen anti-diffusion barrier, according to the requirements of European standard EN 1264-4. Pipe cross linking degree >70 % according to ISO 15875.

	Ordering
		Product	Size (mm)	Length	Code no.
		FH PEXa pipes	14,0 × 2,00	240 m	088X0950
		FH PEXa pipes	16,0 × 2,00	120 m	088X0951
		FH PEXa pipes	16,0 × 2,00	240 m	088X0952
		FH PEXa pipes	16,0 × 2,00	400 m	088X0969
		FH PEXa pipes	16,0 × 2,00	600 m	088X0953
		FH PEXa pipes	16,0 × 2,20	240 m	088X0954
		FH PEXa pipes	18,0 × 2,00	240 m	088X0957
		FH PEXa pipes	18,0 × 2,00	600 m	088X0958
		FH PEXa pipes	20,0 × 2,00	120 m	088X0959
		FH PEXa pipes	20,0 × 2,00	400 m	088X0961
		FH PEXa pipes	25,0 × 2,30	200 m	088X0963
	Accessories
		Product	Connection	Size	Code no.
				16,0 × 2,0 mm	088X1030
			Screw coupling
				20,0 × 2,0 mm	088X1031
				16,0 × 2,0 mm	088X1032
			Press coupling
				18,0 × 2,0 mm	088X1033
			“TH” jaw profile.
				20,0 × 2,0 mm	088X1034
		* We recommend to use compatible “TH” jaws profile from the suppliers: Novopress, Rems and Klauke.

© Danfoss | FEC | 2021.09

AI294453823003en-000701 | 1

Data Sheet FH PEXa Pipes

	Accessories
		Product	Connection	Size	Code no.
			G ½” A,	14,0 × 2,0 mm	013G4144
			external thread	16,0 × 2,0 mm	013G4146
		external thread
				14,0 × 2,0 mm	013G4154
				16,0 × 2,0 mm	013G4156
			G ¾”,
				16,0 × 2,2 mm	013G4163
			internal thread
		internal thread
				18,0 × 2,0 mm	013G4158
				20,0 × 2,0 mm	013G4160

Technical specifications
	Materials						PEXa / EVOH
	Max. working pressure						6 bar
	Max. flow temperature (Short term)						110 °C
	Max. working temperature						95 °C
	Oxygen barrier						EVOH
	Linear expansion coefficient						1,4 × 10-4 K-1
	Thermal conductivity						λ = 0,41 W/m K
	Oxygen-tightness according to DIN 4726						< 0,1 g/m³ × d
	Colour						Natural
Working conditions
	Temperature		Time		Safety Factor		Pressure
							Normal		Reinforced
	20 °C		50 years		1,5		18 bar		19,8 bar
	40 °C		50 years		1,5		14 bar		15,6 bar
	60 °C		50 years		1,5		11 bar		12,4 bar
	70 °C		25 years		2,0		7 bar		8,4 bar
	95 °C		25 years		2,0		5 bar		6,4 bar
Minimum bending radius
		Pipe dimension					Manual pipe bender radius
with bending springs
			16 mm				80 mm (5 × outside diameter)
			20 mm				100 mm (5 × outside diameter)
			25 mm				125 mm (5 × outside diameter)

2 | © Danfoss | FEC | 2021.09

AI294453823003en-000701

Data Sheet	FH PEXa Pipes
Pressure loss	Mass flow, kg/h

10000
																						1
8000																						0	.
																							0
																					8.
																					0	9
			Flow																		7 .
																					0
6000																			6 .
																			0
																		5	.
			velocity
																		0
4000																		.
															0
																.
				(m/s)]												4
									0
										.
										3
2000								0
								.
								2
1000		0
		.
800		1
600
400
									mm
								6
								/2
								32
200								Ø
										mm
									0		mm
								25/2
										0
								Ø	26/2
								Ø					mm
100											/16			mm
										20
									Ø			0/15			mm
											2
80										Ø				4
													/1			mm
											Ø18
															3		mm
													7/1
60												Ø1				2
															/1
													Ø16
40																		0mm
																	/1
																Ø14
20
10
1	2	3	4	5	6	7	8	9 10 1		2					3		4	5	6	7	8 9 10 2		2	3	4	5	6	7	8 9 10 3
																					100								1000

Pressure loss, kPa/m

Water temperature: 40 °C.

© Danfoss | FEC | 2021.09

AI294453823003en-000701 | 3