Acoustic Insulation for Equipment

1. SCOPE…………………………………………………………………..2. REFERENCES
3. GENERAL
4. MATERIALS ……………………………………………………………5. ABSORPTIVE LAYER APPLICATION
6. BARRIER LAYER APPLICATION
7. FINISH APPLICATION ……………………………………………..8. FLASHING
FIGURE
1 Absorptive / Barrier Layer Staggering and Overlapping
2 Sheet and Mastic Barrier Layer Attachment………………..
TABLE
I Equipment Barrier Layer – Finish System Combinations
II Finish Systems

1. Scope
This standard is for the materials and installation of equipment acoustic insulation systems for all
conditions of temperature (dual, hot, cold, cool).
2. References
Reference is made in this standard to the following documents. The latest issues, amendments, and
supplements to these documents shall apply unless otherwise indicated.
SABIC Engineering Standards (SES)
N01-F01 Insulation Systems for Hot Equipment 60 to 648 °C (140 to 1200 °F) (Potential Exposure to
Water))
N01-F02 Insulation Systems for Hot Equipment 60 to 648 °C (140 to 1200 °F) (No Exposure to Water))
N01-F03 Insulation for Cold and Dual Temperature Equipment, -73 to +121 °C (-100 to +250 °F)
N01-F05 Insulation Systems for Equipment, 2 to 121 °C (35 to 250 °F) (No Exposure to Water))
N01-F30 Cutting and Roll Forming of Insulation Jacket
N01-F39 Block, Blanket and Batt Insulation Fastening Method
N01-F43 Fastening of Aluminum Jackets
N01-S01 Index of Materials for Insulation of Equipment
N01-S07 Insulation Material – Acoustic
N01-S08 Insulation Laminates – Acoustic
N01-S09 Insulation Barrier Material – Acoustic
N01-S10 Insulation Adhesives and Sealers – Acoustic
N01-S11 Insulation – Preformed Blocks
N01-S12 Insulation – Blanket and Batt
N01-S15 Insulation – Coatings and Coverings
N01-S16 Insulation – Fastenings and Miscellaneous Items
N01-S17 Insulation Accessory Materials – Acoustic
N01-S19 Insulation – Adhesives and Sealers
S22-G01 Management and Control of Non-Asbestos Respirable Fibres (NARFs)
American Society for Testing and Materials (ASTM)
E 84 Standard Test Method for Surface Burning Characteristics of Building Materials
3. General
3.1 For complete listing of material codes, see SES N01-S01.
3.2 Any combination of listed absorptive and barrier layers shall be acceptable. Table I lists acceptable
barrier and finish layer combinations. Abnormal conditions, for example extreme abuse conditions, and
removable insulation, shall require individual consideration.
3.3 See SES S22-G01 when using materials containing refractory ceramic fibers.
3.4 Manufacturer’s recommended safety precautions shall be followed when handling loaded mastics.
3.5 Installations shall meet flame-spread rating limitations specified in ASTM E84. Except for certain
finishes (see finish tables in SES N01-F02), a flame-spread rating of 75 shall be the maximum installed
rating for any combination of absorptive layer, barrier layer, and finish specified.
3.6 Designation of materials for a particular installation, together with their application, shall be indicated
by identifying the work with this standard number, the absorptive layer code, the absorptive layer thickness
in inches, the barrier layer code (or laminate code where applicable), the barrier surface weight in lb/ft2
,
and the finish system numbers.

For example:

3.7 Equipment shall not be preinsulated as it is easily damaged in handling, and has poor abuse
resistance.
3.8 Insulation shall not be applied until equipment has been protected in conformance with the paint
specifications specified in the purchase order.
3.9 Austenitic stainless steel operating between 60 and 149 °C (140 and 300 °F) in areas that can get wet,
and are deemed to be in critical service, shall be protected by a SABIC approved paint system. Between
149 and 316 °C (300 and 600 °F) austenitic stainless steel shall be protected with sodium silicate.
3.10 Noncritical austenitic stainless steel in areas that can get wet, and operating between 60 and 316 °C
(140 and 600 °F), shall be protected with sodium silicate.
4. Materials
This standard is limited to the materials listed in the following section. Materials identified with * shall not be
used in direct contact with unprotected austenitic stainless steel at or above 60 °C (140 °F) (see 3.8).
4.1 Absorptive Layer Materials – See SES N01-S07, N01-S11 and N01-S12.
CODE
DESIGNATION
112.6
Glass fiberboard
204
High-temperature blanket-reinforced, 650 °C (1,200 °F)
209
High-temperature blanket, 650 °C (1,200 °F)
A10.2
High-density glass fiberboard
4.2 Absorptive/barrier/finish layer laminates – See SES N01-S08.
CODE
DESIGNATION
A30.3
Fiberglass wool core – vinyl-coated glass fabric facing
A30.8 Melamine foam – barium-loaded PVC jacketing
A30.9
Polyisocyanurate foam – barium-loaded PVC jacketing
A30.10 Aluminum jacketing 0.4 mm – loaded vinyl
A30.11
Aluminum jacketing 0.5 mm – loaded vinyl
A30.12 Stainless steel jacketing 0.4 mm – loaded vinyl
A30.13 Stainless steel jacketing 0.5 mm – loaded vinyl
4.3 Barrier layer materials – See SES N01-S09.
CODE
DESIGNATION
A60.3
Loaded vinyl
A60.8
Loaded mastic – latex based

4.4 Accessory materials
4.4.1 Coverings and coatings – SES N01-S15 and N01-S17.
CODE
DESIGNATION
709
Fibrated asphalt cutback
710
Glass cloth – open weave
714*
Poultry netting
716
Smooth aluminum jacket
716.5
Smooth aluminum jacket, coated
716.6
Deep-corrugated aluminum jacket
716.7
Deep-corrugated aluminum jacket, coated
717.1
Two-piece aluminum ell covers
723.1
Kraft aluminum laminate, white
731*
Hypalon mastic
732*
Neoprene roofing coating
734
Insulation mastic
743
Synthetic organic fiber cloth, open weave
A70.1
Glass cloth – open weave
4.4.2 Adhesives and sealers – See SES N01-S10 and N01-S19.
CODE
DESIGNATION
802.1
Lagging adhesive
803.2
Fibrous adhesive
810*
Water-resistant adhesive – rubber base
813
Flashing compound
815*
Anchor adhesive 107 °C (225 °F)
817*
Anchor adhesive 93 °C (200 °F)
819*
Lap adhesive – solvent type
A80.1*
Vinyl lap adhesive
A80.2*
Elastomer lap adhesive
4.4.3 Fastenings and miscellaneous – See SES N01-S16.
CODE
DESIGNATION
921
Stainless steel wire (18 gage)
926
Stainless steel bands and seals 10 mm
927
Stainless steel bands and seals 20 mm
929
Seals and racks
963
Diverter point staples
964.1
Spindle anchors (metal plate)
971.1
Sheet-metal screws (stainless steel)
971.4
Sheet-metal screws (aluminum)
979
Insulation pins (weldable)

980
All-weather breather springs
985*
Tedlar tape (pressure-sensitive)
988*
Polyester film tape
992*
Listing tape (glass cloth)
5. Absorptive Layer Application
5.1 For dual-temperature installations [-73 to +149 °C (-100 to +300 °F)] and cold service [-73 to +1.7 °C
(-100 to +35 °F)], the complete thermal system (basic insulation material, coverings and coatings, and
sealers) shall be applied in accordance with SES N01-F03 before any acoustical absorptive material is
applied.
5.2 For cool service [+1.7 to 27 °C (+35 to 80 °F)] and hot service [60 to 650 °C (140 to 1200 °F)], the
acoustic absorptive material may be applied directly to the equipment if its maximum service temperature is
not exceeded. Where equipment surface temperatures exceed allowable service temperatures of the
selected absorptive layer, a layer of calcium silicate, Code 102 (for carbon steel), or perlite silicate-
inhibited, Code 102.2 [for austenitic stainless steel service at or above 60 °C (140 °F)] shall first be applied
to reduce interface temperatures to within the range of the selected absorptive layer. The thermal
properties of the absorptive layer may be utilized to minimize overall insulation thickness, see Figure 1. An
alternative method shall be to utilize high-temperature absorptive blankets, Code 204 or 209.
5.3 The acoustic absorptive layer may be applied directly over existing thermal insulation without
modification to the thermal system.
5.4 Glass fiber shall be applied in accordance with SES N01-F39.
5.5 Unless otherwise specified in purchase order, all surfaces shall be covered.
6. Barrier Layer Application
6.1 A barrier layer shall be applied over all absorptive layer surfaces. This layer shall be an impervious,
dense sheet material (Codes A60.3, A60.4) or a loaded mastic (Code A60.8). In some situations, standard
finishes will be an adequate barrier layer, and, with SABIC approval, shall be the only additional treatment
after the absorptive layer.
6.2 Sheet barrier materials shall be applied in a watershed fashion, and all joints of barrier material and
absorptive material shall be staggered. Circumferential and longitudinal joints of sheet barrier material shall
be overlapped a minimum of 50 mm, see Figure 1. On horizontal adjoinments of sheet barrier material and
loaded mastics, the sheet material shall be extended a minimum of 50 mm over the mastic, see Figure 2.
On vertical adjoinments, the mastic shall be extended 50 mm over the sheet material to provide a proper
watershed. Sheet barrier materials shall be applied in an airtight, gapless fashion.
6.3 The continuity of the barrier layer shall not be broken. Where it is impossible to fit in the entire specified
thickness of absorptive and barrier layers, the thickness of the absorptive layer shall be decreased to allow
clearance.
6.4 On lead sheet barrier materials and vinyl or elastomer barrier materials, where an additional finish shall
be applied, bands, wire, tape, or adhesive bonding shall be acceptable means of attachment. On vinyl or
elastomer sheet barrier material applications, when these materials will act as the finished surface, wire or
tape shall not be used for attachment. To ensure gapless joints on vinyl or elastomer sheet applications, all
joints shall be adhesively bonded. For vinyl, Code A80.1, or for elastomer, Code A80.2 shall be used.
Sheet-metal screws shall not be used on vinyl, elastomer, or plain sheet lead barrier layer materials.
6.5 Polyurethane foam – PVC jacketing, Code A30.1, shall be applied in accordance with the
manufacturer’s installation procedures.
6.6 See SES N01-F30 for cutting or shearing lead sheeting – aluminum jacketing, Code A30.4, and
SES N01-F43 for fastening of these materials.

6.7 Loaded mastic, Code A60.8, shall be applied directly to absorptive materials and reinforced with glass
cloth, Code A70.1. A tack coat of mastic, approximately half of the desired finished thickness, shall be
applied with sufficient pressure to ensure impregnation of the absorptive layer. Reinforcing fabric shall be
embedded in the wet tack coat and then the final coat shall be applied to the specified wet thickness.
Adjacent pieces of reinforcing shall be lapped a minimum of 50 mm. The installed reinforcing shall be free
of wrinkles and protruding edges. In multiple coat applications, the reinforcing fabric shall be applied to the
middle coating.
7. Finish Application
7.1 If the acoustic insulation treatment will consist of an absorptive layer and finish only, finish systems
specified in SES N01-F01 to N01-F05 shall be applicable.
7.2 When properly sealed in accordance with section 8, many acoustic barrier layers shall require no
additional finish application. These include loaded mastic, Code A60.8, laminates of polyurethane foam –
PVC jacketing, Code A30.1, glass fiber – aluminum jacketing, Code A30.2, and lead sheeting – aluminum
jacketing, Code A30.4.
7.3 Barrier layer applications of loaded vinyls or elastomers may be left unfinished if all lap joints are
adhesively bonded, see Figure 2.
7.4 An additional protective covering shall be required over lead sheeting, except lead-aluminum
laminates. For outdoor locations, an additional protective covering shall also be required over loaded vinyl
and elastomer barrier layer materials. See Tables I and II for finish systems.
8. Flashing
A 6 mm bead of flashing compound, Code 813, shall be applied to all possible points of acoustic leakage
or moisture penetration. Examples include any interruptions of the finish or barrier layer at joints, or
between finish or barrier layers and protrusions, for example valve bonnets, hangers, and instrument
connections. The joints which will be broken when removing a removable cover shall be flashed.