Branch Piping Insulations

XLPE Insulation Foam Technical Specifications

Property

THERM barrier Typical Values

Test Method

Material description

Fire retardant closed cell, chemically cross linked polyethylene

Material form

Prefabricated

Application

Thermal Insulation

Operating temperature

-40°C to + 115°C

Thermal stability

Less than 5 % shrinkage at 90° C for 24 hours

 Colour

Natural

Nominal density (Kg/m3)

33 ± 3kg/m3

BS 4370 Part 1

Thermal conductivity (W/m° K)

Mean Temperature (°C)

W/m°k

K Cal/hr m°C

IS:3346 I 1980

o° C

0.0328

0.0273

23° C

0.0329

0.0282

46° C

0.0383

0.0329

Waler absorption

<1.2 %

ASTM D 1056-90

Water vapour permeance (28 days)

<6×10-3 ng

ASTM E-96

Water vapour transmission

(7 Days)

Negligible

(28 Days)

<1100 µg I m2s

Water vapour resistance factor (µ)

Plain > 11000

DIN 52615

Aluminum foil face one side > 14000

Tensile strength (N/m2)

Min.25

BS 4370 Part 2

 Dimensional stability

No visible changes observed

BS 4370 Part 1

(RH-60%, temp 35° C for 24 hrs.)

Volume percentage of closed cell

>90%

BS 4370 Part 2

Oxygen index, %

29 – 34

ASTM D 2863

Fire characteristic

a) Surface spread of flame Class 1

BS 476 Part 7

Resistance to chemicals

No effect

ASTM C 543

(for both mild acidic & alkaline)

Sound transmission class

40db

IS:9301 / SO 140 / ASTM E 413

(9 MM THERM barrier laminated With 12 mm gypsum board)