- Written by K-FLEX
- font size decrease font size increase font size
Acoustic
• Prevent condensation;
• Minimize heat gain and boil off rate;
• Energy saving;
• Protect personnel;
• Acoustic insulation.
Closed Cells Flexible Elastomeric Foam
First mechanical decoupling layer.
K-FLEX SOLAR HT
Open Cells Flexible Elastomeric Foam
Absorption and dissipation layer.
K-FLEX K-FONIK OPEN CELL
High Density Elastomeric Material
Mass barrier sound insulation layer.
K-FLEX K-FONIK GK/GV
Closed Cells Flexible Elastomeric Foam
Second mechanical decoupling layer.
K-FLEX ST
K-FLEX LS (USA Only)
K-FLEX SOLAR HT
Polymeric Outer Layer Jacketing
UV and weather protective jacketing with joints sealed with K-FLEX sealant.
K-FLEX IN CLAD Jacketing
K-FLEX acoustic insulation solutions are designed for noise reduction in industrial application e.g. piping, industrial processes etc.
A complete multilayer system based on both closed cells and open cells FEF materials provides acoustic insulation according to ISO 15665:2003 Class A, B, C; Shell DEP specification n°31 Class D; NORSOK STD R-004: Class 6, 7, 8; ASTM E1222.
Different materials with different proprieties feature different performance in the system. Each layer has been designed for a specific purpose.
Closed cells FEF layer (K-FLEX ST or K-FLEX HT) works as a mechanical decoupling.
Open cells FEF layer (K-FLEX K-FONIK OPEN CELL) provides sound absorption and dissipation.
High density material (K-FLEX K-FONIK GK/GV) works as mass barrier and sound insulator.
External jacketing layer (K-FLEX IN CLAD) provides mechanical and weather protection.
ISO 15665:2003 defines the acoustic performance of three classes (classes A, B and C) of pipe insulation. It is applicable to the acoustic insulation of cylindrical steel pipes and to their piping components. It is valid for pipes up to 1 m in diameter and a minimum wall thickness of 4,2 mm for diameters below 300 mm, and 6,3 mm for diameters from 300 mm and above.
ISO 15665:2003 covers both design and installation aspects of acoustic insulation and provides guidance to assist noise control engineers in determining the required class and extent of insulation needed for a particular application.
MINIMUM INSERTION LOSS REQUIRED FOR EACH CLASS, ISO 15665:2003 |
|||||||||
CLASS |
Nominal Pipe Diameter |
Octave band centre frequency, Hz | |||||||
125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | |||
lower limit | upper limit | Minimum insertion loss, dB | |||||||
A1 | < 300 | -4 | -4 | 2 | 9 | 16 | 22 | 29 | |
A2 |
≥ 300 |
< 650 | -4 | -4 | 2 | 9 | 16 | 22 | 29 |
A3 | ≥ 650 | < 1000 | -4 | 2 | 7 | 13 | 19 | 24 | 30 |
B1 | < 300 | -9 | -3 | 3 | 11 | 19 | 27 | 35 | |
B2 | ≥ 300 | < 650 | -9 | -3 | 6 | 15 | 24 | 33 | 42 |
B3 | ≥ 650 | < 1000 | -7 | 2 | 11 | 20 | 29 | 36 | 42 |
C1 | < 300 | -5 | -1 | 11 | 23 | 34 | 38 | 42 | |
C2 | ≥ 300 | < 650 | -7 | 4 | 14 | 24 | 34 | 38 | 42 |
C3 | ≥ 650 | < 1000 | 1 | 9 | 17 | 26 | 34 | 38 | 42 |
K-FLEX ACOUSTICAL CONFIGURATIONS FOR ISO 15665 CLASSES
K-FLEX K-FONIK INDUSTRIAL “A2” | ||||||||
![]() |
||||||||
Test Result Class A2 |
Weight: |
Octave band centre frequency, Hz |
||||||
125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | ||
Minimum insertion loss, dB | ||||||||
1 Layer K-FLEX SOLAR HT, 1 Layer K-FLEX IN CLAD |
5Kg/m2 |
1,5 | 1 | 8 | 12,5 | 18,5 | 29,5 | 37,5 |
K-FLEX K-FONIK INDUSTRIAL “B2” |
||||||||
![]() |
||||||||
Test Result Class B2 |
Weight: |
Octave band centre frequency, Hz |
||||||
125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | ||
Minimum insertion loss, dB | ||||||||
1 Layer K-FLEX SOLAR HT, 1 Layer K-FLEX K-FONIK 240, |
12Kg/m2 | -0,5 | 2,5 | 14,5 | 22,0 | 32,0 | 43,5 | 47,5 |
K-FLEX K-FONIK INDUSTRIAL “C2” |
||||||||
![]() |
||||||||
Test Result Class C2 |
Weight: |
Octave band centre frequency, Hz |
||||||
125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | ||
Minimum insertion loss, dB | ||||||||
1 Layer K-FLEX SOLAR HT, 1 Layer K-FLEX K-FONIK 240, |
25Kg/m2 | -1,5 | 4,5 | 17,5 | 30 | 45 | 51 | 51,5 |
K-FLEX K-FONIK INDUSTRIAL “C2” |
||||||||
![]() |
||||||||
Test Result Class C2 |
Weight: |
Octave band centre frequency, Hz |
||||||
125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | ||
Minimum insertion loss, dB | ||||||||
1 Layer K-FLEX SOLAR HT, 1 Layer K-FLEX K-FONIK 240, |
27Kg/m2 | -0,5 | 4,5 | 16 | 24 | 38,5 | 51,5 | 51,5 |
K-FLEX K-FONIK INDUSTRIAL “D2” |
||||||||
![]() |
||||||||
Test Result Class D2 |
Weight: |
Octave band centre frequency, Hz |
||||||
125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | ||
Minimum insertion loss, dB | ||||||||
1 Layer K-FLEX SOLAR HT, 2 Layers K-FLEX K-FONIK 240, |
29Kg/m2 | 0 | 8,5 | 24,5 | 38,5 | 52 | 55 | 49 |
1 Layer K-FLEX SOLAR HT, 2 Layers K-FLEX K-FONIK 240, |
28Kg/m2 | -1 | 6,5 | 20,5 | 37 | 52 | 55,5 | 49 |
1 Layer K-FLEX SOLAR HT, 2 Layers K-FLEX K-FONIK 240, |
30Kg/m2 | -1 | 8,5 | 20 | 36 | 51 | 56 | 50,5 |