SP Slide PEX

SP PEX pipe consists of three layer : Cross-linked Polyethylene (PEX)
Outer anti-diffusion layer
and a bonding layer in between them

The Polyethylene is a non-uniform material. It consists out of an amorphous and “crystalline” zones.
The most effective cross-linking occurs in the amorphous zones, acting at temperatures rising +125˚C. Cross-linking occurs in the “crystalline” zone as well.
Following the cooling stage, the cross-linking process continues in the finished pipes in the open environment and is accelerated when hot water is used in the pipes.
The minimal cross-linking percentage according to the standards is 65%. Pipes consisting of a lower cross-linking percentage (less then 60%) are not recommended to be installed in Radiator heating systems.

Catalog No. Nominal Diameter D [mm] Wall thickness S [mm] Batch Sizes [m]
511620 16 +EVOH 2.0 50 / 100 / 200 / 500
511622 16 +EVOH 2.2 100 / 200
512020 20 +EVOH 2.0 100 / 200 / 500
512028 20 +EVOH 2.8 100
512535 25 +EVOH 3.5 50 / 100
513244 32 +EVOH 4.4 50 / 6 meter poles
Nominal Outer Diameter and wall thickness 16х2.0
EVOH+
16х2.2
EVOH+
20х2.0
EVOH+
20х2.8
EVOH+
25х3.5
EVOH+
32х4.4
EVOH+
Batch size [m] 100/200 100/200 100 100 100 50
Class specification according to ISO 21003 4 2 5 4 2 5 5 5
Application Floor heating Hot & Cold drinking water Radiator heating Floor heating Hot & Cold drinking water Radiator heating Radiator heating Radiator heating
Life span, According to ISO 21003 [years] 49
(при соблюдении температурных режимов приведенных в ГОСТ Р 52134 табл. 26)
Maximum working temperature [°C] 80 95 80 95 95 95
Maximum working pressure [Bar] 10
Maximum Oxygen diffusion
[mg/m3 per day]
0 0 0 0 0.02 0.02
Maximum peak Temperature [°C]
(max. 1 hour)
100 110 100 110 100 100
Cross-linking grade
[%]
Minimum-65, Maximum=85
(Maximal Cross-linking is reached during service lifespan)
Coefficient of thermal conductivity
W/m K
1,2/1,4х10-4
Linear elongation factor at 95˚С 3% per meter
Coefficient of thermal conductivity
W/m C
0.32
Pipe water volume
L/m
0.113 0.106 0.201 0.163 0.254 0.423

Application Classes according to ISO 21003 (GOST 52134-2003)

Application Class Pipes material Pipe type Working Pressure
[Bar.]
Т Working
°С
Lifespan at working temp.
[Years]
ТMax °С Max lifespan at TMax
[Years]
ТPeak_Max 
°С
Maximum endurance at TPeak_Max
[Hours]
Application
1 PB Single-Layer 10 60 49 80 1 95        100 Cold and hot drinking water up to 60°С
PE-RT PE-RT+EVOH
PE-RT/AL/PE-RT
PE-X-c PE-X-c
PE-HD/AL/PE-Xc
PP-H Homopolymer
PP-B Block-polymer
PP-R Polypropylene Random Copolymer
PVC Single-Layer
2 PB Single-Layer 8 70 49 80 1 95 100 Cold and hot drinking water up to 70°С
PE-RT PE-RT+EVOH
PE-RT/AL/PE-RT
6 70 49 80 1 95 100 Cold and hot drinking water
8 70 49 80 1 95 100 Cold and hot drinking water
PE-X-b PE-X-b+EVOH
PE-Xb/AL/PE-Xb
10 70 49 80 1 95 100 Cold and hot drinking water
10 70 49 80 1 95 100 Cold and hot drinking water
PE-X-c PE-X-c
PE-HD/AL/PE-Xc
8 70 49 80 1 95 100 Cold and hot drinking water up to 70°С
8 70 49 80 1 95 100 Cold and hot drinking water up to 70°С
PP-H Homopolymer 6 70 49 80 1 95 100 Cold and hot drinking water up to 70°С
PP-B polypropylene-block
PP-R Polypropylene Random Copolymer
PVC Single-Layer
4 PB Single-Layer 8 20
40
60
2.5
20
25
70 2.5 100 100 High-temperature floor heating
Low-temperature radiator heating
PE-RT PE-RT+EVOH
PE-RT/AL/PE-RT
PE-X-b PE-X-b+EVOH
PE-Xb/AL/PE-Xb
10
PE-X-c PE-X-c
PE-HD/AL/PE-Xc
PP-H Homopolymer 8
PP-B polypropylene-block
PP-R Polypropylene Random Copolymer
PVC Single-Layer
 5 PB Single-Layer  6 20
60
80
14
25
10
90     1 100 100 High-temperature radiator heating
 PE-RT PE-RT+EVOH
PE-RT/AL/PE-RT
6
 PE-X-a PE-X-a+EVOH 10
 PE-X-b PE-X-b+EVO
PE-Xb/AL/PE-Xb
10
 PP-R Polypropylene Random Copolymer 6

Chemical resistance of SP-PEX + EVOH pipes

The following is the estimated chemical resistance of the pipes material:
G – Resistant (The given concentrations at the given temperature does not cause chemical destruction)
F – Fairly resistant (At these conditions there is a partial loss of strength of the pipe and the pipe must be used with an increased margin of safety)
N – Not Resistant (the use of pipes is not recommended for these conditions)
– No data is available

 Substance Concentration [%] Temperature [˚C]
20 70
Nitric acid 30 G G
Nitric acid 50 F N
Ammonia aqueous solution G G
Aniline 100 G
Acetone 100 G G
Gasoline G G F
Bhutan G G
Water G G
Sea water G G
Wine G G
Gas Oil G F
Hexane G F
Hydrochloric acid (HCI) G F
Diesel G F
Caustic Soda G F
Liquid soap G G
Kerosene G G
Mazut G F
Methane G F
Methanol G G
Milk G G
Petroleum G
Gasoline Vapor G F
Hydrogen peroxide 30 G G
Hydrogen peroxide 100 G N
Pesticides G F
Propane G G
Vegetable oil G F
Sulfuric acid 50 G G
Sulfuric acid 98 F N
Hydrogen sulphide G G
Silicone oil G G
Synthetic detergents G G
Hydrochloric acid Concentrated G G
Toluene G N
Carbon dioxide G G
Acetic acid 100 G G
Phosphoric acid 70 G N
Fluoride N N
Ammonium chloride aqueous solution G G
Chloride liquefied F G
Chromic acid 50 G N
Aqua Regia N N
Ethanol G G

Calculated pressure loss in SP-PEX pipes at 20˚C

Pipe Size
 16х2.2
16×2.0
20X2.8 20X2.0  25X3.5  32X4.4
Flow rate
[L/H]
Head loss
%
Fluid flow speed
m/sec
Head loss % Fluid flow speed
m/se
Head loss % Fluid flow speed
m/se
Head loss % Fluid flow speed
m/se
Head loss % Fluid flow speed
m/se
100 1.1 0.25
 200  3.6 0.49
300  7.3 0.74 3.5 0.54
400 12.1 0.98 5.8 0.72
500 17.9 1.23 8.6 0.90 4.6 0.69
600 24.7 1.47 11.8 1.08 6.3 0.83
700 32.4 1.72 15.6 1.26 8.2 0.97 2.8 0.62
800 41.0 1.97 19.7 1.44 10.4 1.11 3.6 0.71
900 50.4 2.21 24.2 1.62 12.8 1.24 4.4 0.80 1.3 0.74
1000 60.7 2.46 29.1 1.80 15.4 1.38 5.3 0.88 1.5 0.52
1100 34.5 1.99 18.3 1.52 6.3 0.97 1.8 0.58
1200 40.2 2.17 21.3 1.66 7.4 1.06 2.1 0.63
1300 46.3 2.34 24.5 1.80 805 1.15 2.4 0.68
1400 52.7 2.53 27.9 1.94 9.6 1.24 2.8 0.73
1500 31.5 2.07 10.9 1.33 3.1 0.79
1600 35.3 2.21 12.2 1.42 3.5 0.84
1700 39.3 2.35 13.6 1.50 3.9 0.89
1800 43.4 2.49 15.0 1.59 4.3 0.94
1900 47.8 2.63 16.5 1.68 4.7 0.99
2000 18.1 1.77 5.2 1.05
2100 19.7 1.86 5.7 1.1
2200  21.4 1.95 6.1 1.15
2300 30.6 2.39 8.8 1.41
2400 32.7 2.48 9.4 1.47
2500 34.8 2.5 10 1.52

For every 1˚C increase, the pressure drops an additional 0.5%.

Example for using the Table:

For this example we will be using a 100[m] long 16×2.0[mm] pipe.
The pressure in the pipeline is 4[atm]=40[mH2O]
We will calculate the pressure drop at 60˚C and 500[L/H] Flow rate
1 .According to the table the pressure drop for 16×2.0[mm] pipe and 500[L/H] flow rate is given at 20˚С at equals 17.9%
2.The delta between table and desired temperature  is 60˚С-20˚С=40˚С.
3. We adjust the table to the desires temperature
17.9%+(40˚Сх0.5%)=37.9%

Diagram for calculating the pressure drop in 100m long SP-PEX pipes

Pressure drop RU

The lifespan of SP-PEX system at 95˚C as a function of the internal pressure for various pipe sizes

Lifespan RU