Employer Doc. No.
NSRP
Complex Project
Nghi S
Son,, Vietnam
Nghi Son Refinery and Petrochemical
Limited Liability Company
Contractor Doc. No.
S-000-139
390-0002V
Rev. 0
Employer Contract No.: XXXXX, Contractor JOB Code: 0
0-6495--20
Page 1 of 50
Date: 24/DEC/13
2
Specification for Cold Service Insulation
Unit No.: Not Applicable
Unit Abbreviation.: Nott Applicable
Document Class: Z
Issue Purpose
Rev
Date
Page
0
A
24/DEC/13
/DEC/13
28/AUG/13
/13
5, 10, 20,
20
21, 22
All
Description
For Construction
First issue
Operation Centre JOB Code:
Responsible Company
JVD
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For Construction
Prep'd
Chk'd
App'd
A.A.
A.A.
Y.I.
Y.I.
M.S.
M.S.
Operation Centre Doc. No.:
Prepared by
A. Alvero
Checked by
Y. Ishiwata
Approved by
M. Sakai
Employer Doc. No.
NSRP Complex Project
Contractor Doc. No.
Title: Specification for Cold Service Insulation
S
S-000-1390-000
0002V
Rev. 0
Page 2 of 50
CONTENTS
1
SCOPE ................................................................
................................................................................................
................................
................................................................
..................................................4
..................................................
2
REFERENCES ................................................................
................................................................................................
................................................................................................
......................................................................
......4
3
DESIGN ................................................................
................................................................................................
................................................................................................
.................................................6
.................................................
3.1
General ................................................................
................................................................................................
................................................................................................
.................................................6
.................................................
3.2
Piping Insulation ................................
................................................................
................................................................
................................................................
................................................................
..................................7
3.3
Equi
Equipment
pment Insulation ................................
................................................................
................................
................................................................
..........................................................
..........................7
4
MATERIALS................................................................
................................................................................................
................................................................................................
..........................................................................
..........8
4.1
General ................................................................
................................................................................................
................................................................................................
.................................................8
.................................................
4.2
Thermal Insulation ................................
................................................................
................................................................
...............................................................
...............................................................9
4.3
Weatherproof Jacket ................................
................................................................
................................
................................................................
.........................................................
.........................11
4.4
Vapour Barrier Mastic, Sealants and Adhesive ................................
................................................................
..............................................12
..............................................
4.5
Ancillaries ................................................................
................................................................................................
................................................................................................
...........................................14
...........................................
5
APPLICATION ................................................................
................................................................................................
................................................................................................
....................................................................
....14
5.1
General ................................................................
................................................................................................
................................................................................................
...............................................14
...............................................
5.2
Piping and Cylindrical Equipment 900mm Diameter or Less .......................................................
.......................................................16
5.3
Vertical Vessels and Pipe Greater than 900mm Diameter .............................................................
.............................................................17
5.4
Horizontal Vessels and Pipe Greater than 900mm Diameter ........................................................
........................................................18
5.5
Acoustic Insulation................................
................................................................
................................................................
............................................................
............................................................19
5.6
Fire Hazard Protection Insulation ................................................................
................................................................................................
....................................................................
....20
5.7
Contraction Joints ................................
................................................................
................................................................
.............................................................
.............................................................20
6
TABLES ................................................................
................................................................................................
................................................................................................
..............................................21
..............................................
6.1
Table 1: Insulation, Classification and General Conditions of Use..............................................
..............................................21
6.2
Table 2: Insulation Form and Method of Securing ................................
................................................................
.........................................23
.........................................
6.3
Table 3: Vapour Barrier, Metal Cover and Method of Securing ....................................................
....................................................25
6.4
Table 4: Insulation Thickness for Prevention of Heat Gain (PU / PIR) .........................................
.........................................27
6.5
Table 5: Insulation Thickness for Prevention of Heat Gain (Cellular Glass) ...............................29
6.6
Table 6: Thickness of Acoustic Insulation ................................
................................................................
......................................................
......................31
7
DOCUMENTATION................................
................................................................
................................................................
.............................................................
.............................................................31
8
FIGURES ................................................................
................................................................................................
................................................................................................
.............................................33
.............................................
8.1
Figure 1 : Piping................................
................................................................
................................................................
................................................................
................................................................
.................................33
8.2
Figure 2 : Removable Covers for Flanged Valves ................................
................................................................
..........................................38
..........................................
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NSRP Complex Project
Title: Specification for Cold Service Insulation
Employer Doc. No.
Contractor Doc. No.
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0002V
Rev. 0
Page 3 of 50
8.3
Figure 3: Details of Insulation Vapour Barrier and Metal Jacket on Vertical Vessels ................42
8.4
Figure 4 : D
Details
etails of Insulation , Vapour Barrier and Metal Jacket on Horizontal Vessels ........45
8.5
Figure 5: Acoustic Insulation End Cap Fabrication Details ..........................................................
..........................................................48
8.6
Figure 6 : Acoustic Insulation Support , Classes B &C................................................................
................................................................
.................................49
8.7
Figure 7 : Personnel Protection ................................................................
................................................................................................
.......................................................................
.......50
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Employer Doc. No.
NSRP Complex Project
Contractor Doc. No.
Title: Specification for Cold Service Insulation
1
S
S-000-1390-000
0002V
Rev. 0
Page 4 of 50
SCOPE
(1) This specification
pecification covers the use of thermal insulation for above ground, external insulation of
piping and equipment in cold service between minus 100ºC and plus 31ºC for the purpose of
reducing heat gain, process stabilisation and the prevention of condensate accumulation.
accumulation
(2) The insulation requirements of this specification
pecification are suitable for use in both indoor and
outdoor service with normal process plant atmospheres. Alternative designs and materials
shall be considered if necessary for highly corrosive atmospheres or potential
potential leaks and spills
of chemicals.
(3) This specification does not cover hot service insulation. For hot service insulation
requirements refer to Specification for Hot Service and Acoustic Insulation
(S-000
000-1390-000
01V).
(4) This specification does not cover Vendor designed insulation for Refrigeration packages
including cryogenic pumps, compressors and tanks. This specification is intended to cover
Purchaser supplied insulation for selected parts of such packages.
(5) This specification does not cover Process or Large Product Storage Tanks and Spheres, nor
insulated underground piping and equipment.
equipment
(6) Piping and equipment
quipment requiring insulation shall be specified on the following project
documents:
1) Engineering Flow Diagrams and Line Lists
2) Piping General Arrangements and Isometrics
Iso
3) Instrument Piping Details and Schedules
4) Project specific Vessel and Exchanger Drawings and Insulation Schedules
5) Equipment Suppliers General Arrangement Drawings for equipment items and Purchaser
insulated package equipment
equipment.
2
REFERENCES
(1) Engineering Standards
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1) S
S-000-13A0-0
0001V
Specification for Painting
2) S
S-000-1390-0001V
0001V
Specification for Hot Service and Acoustic Insulation
3) S
S-000-1244-0002V
0002V
Specification for
or Equipment Noise Control
4) D
D-000-1351-0001V
0001V
Standard Drawings for Pressure Vessels
Employer Doc. No.
NSRP Complex Project
Title: Specification for Cold Service Insulation
Contractor Doc. No.
S
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0002V
Rev. 0
Page 5 of 50
(2) International Standards
ASTM A167
ASTM C177
Specification for Stainless and Heat
Heat-Resisting
Resisting
Chromium
Chromium-Nickel
Nickel Steel Plate, Sheet and Strip.
Test Method for Steady-State
Steady State Heat Flux Measurements and
Thermal Transmission Properties by means of the Guarded
Hot--Plate
Plate Apparatus
ASTM C552
Standard Specification for Cellular Glass Thermal Insulation
ASTM C795
Specification for Thermal Insulation for Use in Contact with
Austenitic Stainless Steel.
ASTM D696
Test Method for Coefficient of Linear Thermal Expansion of
Plastics Between –30ºC
30ºC and 30ºC
ASTM D1621
Test Method for Compressive Properties of Rigid Cellular
Cellular
Plastics
ASTM D1622
ASTM D1623
Test Method for Apparent Density of Rigid Cellular Plastics
Test Method for Tensile and Tensile Adhesion Properties of
Rigid Cellular Plastics
ASTM D2856
Test Method for Open-Cell
Open Cell Contents of Rigid Cellular
Plastics by the Air Pycnometer
ASTM E84
Test Method for Surface Burning Characteristics of Building
Materials
ASTM E96
ASTM SC 177
ISO 15665
Test Methods for Water Vapour Transmission of Materials
Test Method for Steady-State
Steady State Heat Flux Measurements.
Acoustic Insulation for Pipes, Valves and Flanges
BS 476 Parts 23
23-31
Fire Tests on Building Materials and Structures
BS 476 Part 7
Fire Tests on Building Materials and Structures – Method of
Test to Determine the Classification of the Surface Spread
of Flame of Products.
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Employer Doc. No.
NSRP Complex Project
Title: Specification for Cold Service Insulation
BS 1449
Contractor Doc. No.
S
S-000-1390-000
0002V
Rev. 0
Page 6 of 50
Steel plate, sheet and strip. Carbon and
carbon
carbon-manganese
manganese plate, sheet and strip. General
specificat
specification.
BS EN 10025
Hot Rolled Products of NonNon-Alloys
Alloys Structural Steels:
Technical Delivery Conditions
3
DESIGN
3.1
General
(1) In this specification,
specification, insulation for reducing heat gain is designed to provide thicknesses that
limit the heat gain to 25W/m2 and that result in hot face surface temperatures that minimise
the formation of condensation in ambient air temperature of 31ºC..
(2) Personnel protection shall be installed for unlined equipment
quipment and piping with exposed surface
temperatures of minus 10ºC and below.
(3) Items requiring low level vapour relief load and systems required to operate during a fire, shall
be subject to fire protection insulation.
(4) Equip
Equipment,, vessels and piping shall be insulated with the thickness of insulation appropriate
to the insulation classification and operating temperature.
(5) The insulation classification shall be identified by a type code in accordance with Table 1.
(6) The design of the insulation system, including the selection of adhesives, weather coatings,
vapour seals and joint sealers shall take into account that piping and equipment
quipment may be
subject to elevated temperatures during purging, cleaning and flushing operations.
(7) Instal
Installation
lation of approved materials will proceed according to the manufacturers indicated
requirements and recommendations. Proposed techniques which do not meet the
manufacturers’ requirements will require ‘Prior Approval’.
(8) Each line shall be insulated as a sing
single
le unit. A minimum clearance of 50mm shall be
maintained between the outer surface of insulation and any obstruction such as structural
steel, electrical conduit, piping or other insulated lines.
(9) Instruments and associated piping subject to operating flow and/or temperature conditions
approximating those in the piping or equipment
quipment to which they are connected, shall be
insulated to the same requirements as that piping or equipment in accordance with Table 1.
(10) Insulation contraction joints shall be provided for
fo all equipment and piping where differential
thermal movements exceed 15mm, and shall be positioned under insulation layer support
rings, clips and lugs when they are used. Contraction joints shall be constructed as stated in
Section 5.7.
(11) Insulation for vvessels
essels and similar equipment shall be adequately supported by clips and
supports lugs, welded around the equipment item and positioned in accordance with
Standard Drawings for Pressure Vessels (D-000-1351
(D
1351-0001V).
(12) On vertical pipe lines or lines inclined more than 45°
45 from horizontal and where straight runs
are in excess of 3m length, a bolted insulation support shall be installed at the bottom and
every 3m thereafter.
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Title: Specification for Cold Service Insulation
Employer Doc. No.
Contractor Doc. No.
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(13) The width of support rings shall be such that the inner layer(s) and one half of the outer
outer layer
of the insulation shall be supported.
(14) Pipe supports and hangers shall be either pre-insulated,
pre insulated, clamp on type supports or wrapper
plate type supports, providing the insulation has sufficient compressive strength to withstand
the loading.
3.2
Piping In
Insulation
(1) Piping systems requiring insulation shall be fully insulated, including all piping fittings and
components together with supports, piping and tubing of insulated instruments drains valves
and flanged joints. Valves shall be insulated up to and including
luding bonnet flanges but not yoke
or the packing gland.
(2) Insulation shall not be applied to piping and piping components which become cold
intermittently (i.e. blow down or pump out systems, drain or filling systems etc) unless
required for acoustic attenuation,
attenuation, personnel protection or as otherwise specified. Note: If this
piping is connected to an insulated cold source, it shall be treated as a projection and
insulated in accordance with paragraph 3.2(3).
3.2
(3) All metal protrusions through the insulation shall be insulated in accordance with Table 4 or
Table 5. Protruding metal parts include, but are not limited to, pipe trunnion supports, pipe
support clips, pipe hangers and uninsulated piping connections such as vents, sample
connections and uninsulated instru
instrumentation.
mentation.
3.3
Equipment Insulation
(1) Equipment
quipment items requiring insulation shall be fully insulated including all nozzles, manways,
bolted flanges, stiffener rings, exchanger channels and bonnet flanges.
(2) Insulation shall not be applied to pumps, fans, compresso
compressors,
rs, blowers or other rotating or
reciprocating equipment unless required for acoustic attenuation, personnel protection or
specific process requirements. Items shall be evaluated on an individual basis.
(3) Vessels and their skirts or saddles shall be thermally
thermally isolated from their holding down bolts.
Fabric based phenolic laminate blocks shall be used for this purpose.
(4) Where equipment is supported on metal saddles, the insulation shall be carried down the
saddle to the junction of the saddle and the thermal iso
isolation
lation material. The vapour barrier
shall continue down over the isolation material.
(5) Where equipment is supported through the use of attached support lugs resting on
unattached structural steel members, the insulation shall be extended not less than four times,
times,
the insulation thickness in each direction, measured from junction of equipment with insulated
support lug. Thickness of insulation over structural steel members shall be one half that
specified for body of equipment
equipment.. Thickness of insulation over sup
support
port lugs shall be the same
as the body insulation.
(6) Equipment support legs shall be insulated with insulation blocks as part of equipment area.
Insulation is to extend down legs a distance of four times, insulation thickness, measured
from leg/
leg/equipment
equipment junction.
nction. Thickness shall be as specified for body of equipment.
equipment. The body
insulation shall be brought up to and butted firmly against the leg flange. Spaces between
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flange and webs of structural members shall be filled with block cemented in place with
speci
specified
fied insulation adhesive.
(7) Skirts supporting vertical equipment shall be insulated inside and outside. Insulation shall
extend downward from junction of skirt with bottom head for a distance of not less than four
times the thickness of insulation, but in no case less than 300mm. Thickness shall be
specified for body of equipment
equipment.. Insulation shall be secured to inside of skirt with specified
insulation adhesive. Insulation inside skirt shall be supported on angle or plate support.
(8) All metal such as insulation support rings or stiffeners except vacuum stiffening rings, which
are an integral part of the vessel, shall be insulated with two thirds the total of multi-layer
multi
insulation thickness with thicknesses rounded up to the nearest 10mm. Full thickness
insulati
insulation
on is required for single layer application.
(9) For metal projections not provided with insulation for the entire length, vapour weather barrier
material shall be continued along the uninsulated metal for a minimum of 150mm to ensure a
tight joint. A low operating
operating temperature valve bonnet extension through the insulation
represents a specialised case of metal projection. A mastic seal shall be provided between
the bonnet and the insulation around it, as well as providing a continuance of the vapour
barrier alo
along
ng the metal.
(10) Where necessary, the insulation shall be taken over any nameplate without a break. The
position of the nameplate shall be marked on the outer covering and where warning notices
occur, these shall be copied on the outside of the insulation finish. A duplicate nameplate
shall be installed over the outside surface of the insulation system. The method of attachment
used shall not puncture the vapour seal. Before insulation work is commenced, a certified
copy or rubbing of the nameplate shall be made for retention in the equipment record.
(11) The pre
pre-insulation
insulation of vertical vessels in the horizontal position prior to erection is not
permitted.
4
MATERIALS
4.1
General
(1) All materials covered by this specification shall be of high quality, good appearance, and shall
not have any deleterious action on the surface to be insulated.
(2) Insulation materials shall be chemically inert, non sulphurous, water repellent, rot proof,
vermin proof, impervious to hot water and steam, non injurious to health and non corrosive to
equipment or piping materials, (even if soaked with water at ambient temperatures for
extended periods).
(3) Pre-formed
formed insulating materials shall be manufactured at the manufacturer’s works and
transported to the application site in properly constructed pack
packaging
aging cartons or crates. All
insulation materials shall be properly stored at the application site in suitably weatherproofed
storage areas.
(4) The use of insulation materials containing asbestos in any form is not permitted.
(5) Insulation and jacketing material
materials
s backed with paper or other flammable material is not
acceptable.
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Employer Doc. No.
NSRP Complex Project
Contractor Doc. No.
Title: Specification for Cold Service Insulation
4.2
S
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Page 9 of 50
Thermal Insulation
(1) Insulation material shall be either “Polyisocyanurate” (PIR) or “Cellular Glass” and shall
conform to the following requirements:
1) The cellular glass shall be of a glass thermal insulation material composed of numerous
hermetically sealed cells. The material shall be made by expanding molten glass to
approximately 15 times in volume. The cellular glass shall be totally inorganic and contain
no binders.
2) The insulation material
material shall be supplied plain faced in manufacturer's standard sizes.
Single or multi layer insulation shall be supplied as defined in Table 4 or Table 5.
3) In addition to the above, the Cellular Glass insulation shall have the following physical
properties an
and
d shall be in accordance with ASTM C552
Density
115 kg/m³
Combustibility
Non combustible
Compressive strength (Avg. at break
7 kg/cm2
point)
Hygrocopicity Zero Water Absorption
Zero
Permeability
Zero
Capillarity
Zero
Coefficient of Thermal Expansion
8.5 x 10-6/°C
10 °C
Specific Heat
0.84 kJ/kg°C
kJ/kg
Service Temperature Limits
-260
260°C to +430
+430°C
Sound Transmission (Avg. at normal
28dB for a 100mm thickness
frequency)
Thermal Conductivity
*Mean Temp ((°C)
Average Maximum
'k' (W/m°C)
(W/m
*Mean temperature is
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=
-10
10
0.036
0
0.039
+10
0.0378
Cold face temperature + Hot face temperature
2
NSRP Complex Project
Title: Specification for Cold Service Insulation
Employer Doc. No.
Contractor Doc. No.
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Rev. 0
Page 10 of 50
4) The Polyisocyanurate shall be CFC
CFC-free,
free, self-extinguishing
self extinguishing type Polyisocyanurate cut
from bun stock.
5) The bun stock shall be foamed and cured at the manufacturer’s factory. Only cutting and
fabrication from bun stock can be performed at site.
6) The insulation material shall be supplied in manufacturer’s standard sizes. Single or multi
layer insulation shall be supplied as defined in Table 4 or Table 5.
7) In addition to the above, the Polyisocyanurate insulation shall have the following physical
properties:
Density
40kg/m2 min.
Closed Cell Content
90% min
Water Vapour Permanence at 23°C
23°C &
0.8 g /(m².h )
50% RH.
Flame Spread
Less than 25,
25, ASTM E84
Class 1 to BS476 Part 7.
BS 476. Pt. 7, Class 1
Coefficient of Linear Thermal Expansion
At 23ºC 70X10
70X10-6
6 m/(m.K) max At -165ºC
165ºC
and Contraction
50X10-6
50X10 6 m/(m.K) max
Compressive strength minimum value of
0.2MPa. min.
all directions.
Tensile strength minimum value of all
0.3MPa. min.
directions.
Leachable halide content
60 ppm max.
Thermal Conductivity @ 20°C
20 mean temp:
Freshly blown foam (within 3 weeks of
0.020 w/mK max.
production)
Aged at 21ºC for 180 days (sample cut on
both sides)
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0.023 w/mK max.
NSRP Complex Project
Title: Specification for Cold Service Insulation
Employer Doc. No.
Contractor Doc. No.
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8) Low density mineral fibre slabs or blanket (unfaced) for application at contraction joints,
also valves and flange joints as in
in-fill
fill material shall have the following minimum properties:
Density
32-33
32 33 kg/m3
Thermal conductivity (at 25ºC mean
0.035 W/m°C
temperature)
Free from any shot or course fibres
9) Semi rigid mineral fibre for acoustic attenuation requirements shall meet the following
requirements:
Density
80 to 100 kg/m3
Alkalinity
pH 6-10
6
Combustibility
Non combustible
Flow resistivity of acoustic mineral fibre
(porous layer)
25,000 to 75,000 Ns/m4
Chloride content
20 ppm*
Sodium plus Silicate content
50 ppm*
* See Fig. 1 ASTM C795 for wicking type insulation over Stainless Steel
4.3
Weatherproof Jacket
(1) The selection of Aluminium material in both coil and flat sheeting form for use as the thermal
insulation protective metal cover shall take precedent over other metallic coverings with the
exception of fire hazard protection, whe
where
re aluminised steel ASTM A463 steel covering shall
be used.
(2) Aluminium jacketing shall be flat mill finished commercial grade of alloy ASTM which shall
comply with BS 1470 or ASTM B209 under the following material designations:
BS 1470 –
3103 – H6
ASTM B209 Alloy 3003 –
H14 or H16
(3) The thickness of the jacketing shall be as specified in Table 3.
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Employer Doc. No.
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Contractor Doc. No.
Title: Specification for Cold Service Insulation
4.4
S
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0002V
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Page 12 of 50
Vapour Barrier Mastic, Sealants and Adhesive
(1) The outer layer vapour barrier used to seal all piping and equipment insulation against the
ingress of moisture shall be fire resistant mastic possessing good flexibility and based on a
solution of copolymer of vinyl chloride and vinyl isobutyl ether in blend with high boiling
aromatic solvent and cyclohexanone; and pigmented with neutral pigments and aluminium
paste.
te. Vapour barrier mastic shall be applied to a total nominal dry film thickness of 3mm.
(2) The vapour barrier shall have the following properties:
Service temperature range
-30°C to +80°C
+80
Flame spread (dry state)
20 or less per ASTM E84 or BS 476, Part 7, Class
1
Water vapour permeance
ASTM E 96, Method E, 0.024 perms (0.016 metric
perms) at 51 mils dry (1.3mm) (g/Pa.s.m2 )
Colour
Aluminium
Solids content
54% by volume (trowel grades)
(3) The joint sealant used to seal all insulation joints on pipe work and equipment shall be based
on marine oil (blend of fish oils) pigmented with neutral fillers and aluminium paste, dissolved
in a small quantity of xylol. The material shall have the follow
following
ing properties:
Coverage
0.3m²/litre at 3.2 mm Film
0.6m²/litre at 1.6 mm Film
Solid Content
98% minimum, by volume
Drying Time
Touch 8 hours through 7 to 14 days
Water vapour transmission rate
ASTM E 96, Negligible (g/Pa.s.m2 )
Service temperature limits
-60°C to +150°C
+150
Solvent
White spirit or xylol
Flammability
dry low flame spread
(4) The fabrication adhesive used for bonding together pieces of prefabricated cellular glass
insulation for fittings, flange covers and valves, also for joint bonding at contraction joints in
vertical pipe work shall be a fire resistant one pack
pac grey paste of trowelling consistency
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Title: Specification for Cold Service Insulation
S
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Page 13 of 50
composed of medium oil length alkyd resin solution in xylol, pigmented with neutral fillers, and
having the following
following properties:
Coverage
1.9 to 2m²/litre
Solids content
79% by weight
Drying time
Bonding 2 to 10 minutes through 24 to 36 hours
Service temperature limits
-45°C to 150°C
150
Solvent
Xylol
Flammability
BS 476, Pt. 7, Class 1
(5) The metal sealant suitable for gun extrusion at all metal overlays shall be a tough, durable
sealant consisting of a metallic and mineral pigment filled copolymer resin solution with the
following properties:
Solid content
57% by volume
Coated surface temperature limits
30°C
°C to +180°C
Flammability
BS 476, Pt. 7, Class 1
Colour
Aluminium
(6) The heat resistant sealant for use in flashing of protrusions shall be a grey, high solids
content flexible compound, based on selected oils and of a soft paste consistency of an
approved type, with the following properties:
Solid Content
98% by volume
Service temperature limit
-60°C
60°C to +150°C
Water vapour permeance
ASTM F-1249,
F 1249, 0.6 perm (0.04metric perm
tested at 3.2mm(g/Pa.s.m2 )
(7) To reduce abrasion from vibration, expansion and contraction of vessels and piping, an
anti--abrasion
abrasion compound shall be applied which is non
non-flammable
flammable and fire resistant to the
inner surfaces of cellular glass.
(8) Adhesive for securing insulation to metal surfaces
surfaces shall be a two part adhesive compound of
polyurethane modified bitumen.
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Title: Specification for Cold Service Insulation
4.5
Employer Doc. No.
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Page 14 of 50
Ancillaries
(1) Adhesive tape used to secure all inner layers of insulation where applied to pipe work and
equipment in two layers, shall be a pressure sensitive glass fibre reinforced tape 19mm wide.
(2) Bands and seals for securing pipe work and equipment insulation and jacketing shall be Type
304 stainless steel, soft annealed temper. Bands shall be in handable coils 0.5mm thick ready
to be cut as required in width sizes as shown in Table 2 and Table 3.
(3) Reinforcing membrane for embedding between coats of the vapour barrier mastic shall be
open weave glass cloth No. 10 having 18 x 12 threads per 25mm and with a weave lock
finish.
(4) Toggle fasteners to secure removable boxes shall be of quick release, spring shackle lock
type and shall be sized commensurate with the weight of the box concerned. All fasteners
shall be constructed from stainless steel.
(5) Rivets required for metal jacket fabrication shall be the expanding Monel 'pop' blind eye type,
9.5mm long x 5mm diameter.
(6) The material requirements of normal insulation accessories shall be as follows:
1) ‘S’ and ‘J’ clips – formed from 20mm wide stainless steel banding.
2) Floating rings – shall be 10mm
10mm-dia.
dia. carbon steel rod conforming to EN 10025, 235JR, or
equivalent national or international specification.
5
APPLICATION
5.1
General
(1) Piping and equipment shall have all welding completed and shall be hydrostatically or
pneumatically tested prior to application of insulation. Surfaces to be insulated shall be free of
all oil, grease, loose scale and foreign matter and shall be dry.
(2) The Insulation Applicator shall not perform any welding on pipe or equipment;; he shall
however be responsible to carry out checks for sufficient insulation supports.
(3) All lines an
and equipment scheduled for cold insulation shall be coated where required in
accordance with the Specification for Painting (S-000
(S 000-13A0-0001)
0001).
(4) Site touch up of the shop coating including preparation and painting at field welds shall be
completed prior to commencement
commencement of insulation.
(5) Insulation for fittings, flanges and valves shall be the same thickness as the insulation of the
pipe.
(6) Stiffener rings where provided on vacuum equipment and/or piping shall be insulated with the
same thickness of insulation as sp
specified
ecified for that piece of equipment or piping. The rings shall
be fully insulated independent of the equipment or piping. Initial layers of insulation shall be
applied with all joints tightly butted and staggered relative to each other.
(7) Additional layers of insulation, where required, shall be applied in the same manner as the
first layer with side and end joints staggered between joints of preceding layers, so that no
two joints coincide.
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(8) All joints of single layer or outermost layers of multi-layer
multi layer insul
insulation,
ation, with the exception of
contraction joint locations, shall be buttered with specified joint sealer before installation. In
multi
multi-layer
layer constructions, the first layer shall be applied without sealant. The joints shall be
tightly drawn together when ins
insulation is applied so that only a very thin joint seal remains.
(9) Insulation shall be applied with all joints fitted to eliminate voids. Large voids shall not be filled
with vapour seal coating, but eliminated by refitting or replacing insulation.
(10) Each line shall be insulated as a single unit. Adjacent lines shall not be enclosedwithin a
common insulating cover.
(11) The face of the insulation in contact with the steel surfaces shall be given a coat of Fosters
30/16 anti
anti-abrasive
abrasive compound or ‘Prior Approved’ equal
equal.
(12) Whenever the application of mastic is referred to in this specification,
specification, it shall be applied in two
coats (with reinforcing fabric as specified) to obtain a total dry thickness as recommended by
the manufacturer, but not less than 2.4mm. The mastic shall be applied as a continuous
moisture vapour mastic covering.
(13) All insulation materials listed in this specification shall be kept dry and shall be applied only to
thoroughly dry frost-free
frost free surfaces.
(14) All insulation material applied in one day shall have at lleast
east one coat of the vapour barrier
applied the same day. If impractical to apply the first coat of the vapour barrier, exposed
insulation shall be temporarily protected with a moisture barrier, such as an appropriate
polyethylene film, and sealed to the p
pipe
ipe or equipment surface. All exposed ends shall be
protected before work stoppage.
(15) Vapour stops shall be installed at all directly attached pipe support locations and at locations
requiring potential maintenance, such as valves, flanges and instrumentation
instrumentation connections to
piping or equipment.
equipment. If specified that certain valves and flanges are required to be left
uninsulated until after plant start up, temporary vapour stops shall be installed.
(16) No holes, thin spots or open joints in the vapour barrier shall be allowed. The vapour barrier
shall be installed in such a manner than no area of the insulation is exposed to the
atmosphere.
(17) Metal jacketing fabrication or installation shall not result in the mastic vapour barrier being
punctured.
(18) Wire shall not be used to secure the insulating system. During construction, glass fibre
filament tape shall be used to secure the inner layer(s) of the insulation and stainless steel
bands for the outer layer. The sheet metal jacketing shall be secured with stainless steel
band
bands.
s. The type and method of securing insulation and jacketing is summarised in Table 2
and Table 3.
(19) Insulation for vessel manways, exchanger channels and bonnet flanges shall be equal in
thickness and type to that applied to the main equipment
equipment.. The insulation
insulation shall be applied
similar to the equipment with all voids kept to a minimum and packed with glass fibre
insulation where unavoidable. All joints shall be tightly fitted together and staggered where
possible.
(20) Cellular Glass and PIR blocks shall be applied using a bedding compound to avoid voids in
the inner layer that could contract water. Such bedding compound shall be approved by
Employer and meet the material manufacturers installation requirements
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Piping and Cylindrical Equipment 900mm Diameter or Less
(1) Insulation to the specified thickness shall be applied by the use of pre-formed
pre formed two (2) half pipe
sections wherever possible. For diameters where half sections are not available, multi
segments or radiused and bevelled lags shall be used.
(2) Insulation shall be applied starting with a full-length
full length piece and a half-length
half length piece so as to
stagger the circumferential joints. When more than one layer is employed, the joints in the
second layer shall not match the joints of the previous layer.
(3) When applying Cellular Glass, the bore of the inner layer shall be coated with a thin
application (to fill surface cells only) of anti abrasion compound and allowed to dry before
application of insulation to the surface.
(4) All joints of single or outermost layers of insulation, w
with
ith the exception of contraction joints,
shall be buttered with the specified joint sealer before installation and then firmly butted
together.
(5) Inner insulation layers applied in two half sections, shall be secured with 19mm wide pressure
sensitive filament
filament tape bands spaced at 220mm maximum centres applied with a 50%
overlap. Single or outer layers and where inner layers are applied in radiused and bevelled
segments, securing shall be by 12mm wide x 0.5mm thick stainless steel bands at 220mm
maximum centres,
centres, machine tensioned and sealed.
(6) Insulation on bent pipe shall be neatly cut and mitred to suit the contour of the bend. All the
external surfaces of the insulation shall be rasped smooth to facilitate the vapour barrier.
(7) Insulation of flanges, flanged fit
fittings
tings and valves shall consist of prefabricated fitting covers of
the same material and thickness and applied in the same manner as specified for pipe
insulation. The insulation shall stop short of studs and/or nuts to permit easy removal without
damage to the insulation. Voids created by stopping short at studs and/or nuts shall be
packed with glass fibre in-fill
in fill material. Securing bands shall be so located that maximum
strength and security is obtained.
(8) The installed insulation shall be vapour sealed with a vapour barrier as follows:
1) A thin coat of mastic shall be sprayed or towelled on to a minimum thickness.
2) While the mastic is still tacky, an open weave reinforcing fabric shall be laid smoothly and
thoroughly embedded in the coating. Care shall be exerc
exercised
ised that the weave does not
rupture and, the fabric shall be overlapped a minimum of 80mm at joints to provide
strength equal to that maintained elsewhere.
3) Before the first coat becomes dry to the touch a second coat of mastic shall be sprayed or
towelled over the reinforcing fabric with a smooth unbroken surface and allowed to dry.
4) The total thickness of barrier material shall be 3mm (nominal).
(9) Insulation on cylindrical straight sections of piping shall be covered with an additional
protective sheet metal jacketing to the requirements of Table 3 rolled to conform to the pipe
diameter and applied in 1.0 metre lengths. The jacketing shall be applied with minimum
50mm overlaps at both longitudinal circumferential overlaps
(10) All longitudinal overlaps on horizont
horizontal
al pipes shall be arranged weatherside down to shed
water and shall be located along the lower half at approximately 135º or 225º positions.
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Longitudinal overlaps on vertical pipes shall be arranged away from the prevailing site
weather conditions.
(11) The met
metal
al covering shall be secured tightly around the insulated pipe and held in place with
stainless steel bands at a maximum of 220mm centres. One band shall be located on each
circumferential lap and the distance between laps divided at equal band spacing.
(12) Each
ch section of metal covering on vertical piping with insulation diameters larger than 250mm
shall be supported from the next lower sections with two 'S' clips fabricated from banding
material. The 'S' clips shall be of sufficient length to allow the minimum
minimum overlap of 50mm.
(13) Insulated bends and elbows on piping 80mm (3") NPS and larger, shall be metalled with
'lobster back' segments using 10mm minimum ball swage to assist shaping. The metal
segments shall be banded.
(14) Insulated bends and elbows on piping smaller
smaller than 80mm (3") NPS and where constricted at
the throat bend, shall use fabricated 'stove pipe' elbows.
(15) Butt weld, socket weld and threaded valves, where insulated, shall be clad and secured as
pipe.
(16) Removable covers on flange joints, flange valves etc. shall be fitted with snap fasteners for
quick and easy removal.
5.3
Vertical Vessels and Pipe Greater than 900mm Diameter
(1) Insulation to the specified thickness shall be applied by the use of pre-formed
pre formed radiused and
bevelled lags for vessel, shells and pipes, and pre-formed
formed sets for vessel heads. Insulation
shall be bonded to the vessel heads using a suitable bedding compound as recommended by
the insulation manufacturer
(2) Insulation shall primarily be supported on rings welded to the steel surfaces. Additional
support
upport and application aid shall be provided by the use of adhesive.
(3) Insulation shall be applied starting from the bottom with vertical joints staggered. When more
than one layer is employed, the joints in the second layer shall not match the joints of the
previous layer.
(4) When applying Cellular Glass the base of the inner layer shall be coated with a thin
application (to fill cells only) of anti abrasion compound and allowed to dry before application
of insulation to the surface.
(5) All joints of single or outermost
outermost layers of insulation, with the exception of contraction joints,
shall be buttered with the specified joint sealer before installation and then firmly butted
together.
(6) Insulation shall be held against the metal surface with stainless steel bands in accordance
accordance
with Table 2 at 300mm maximum centres.
(7) Heads of vessels shall be insulated with pre-formed
pre formed vessel head insulation sets. Where
fabrication is necessary the material shall be cleanly cut and shaped to closely follow the
contour of the head. The joints
joints shall be buttered in accordance with paragraph 5.3.5. The
insulation shall be secured to the heads by bands drawn radially from the tan line
circumferential body bands attached at 300mm centres, to a centralised floating ring of 10mm
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diameter bar. The bands shall be tensioned in suitable sequence to ensure a positive
securing of the insulation material. Adhesive shall be used for initial support on bottom heads.
(8) An additional layer of insulation shall be applied over the outside layer where insulation
supports
upports are located.
(9) The installed insulation shall be vapour sealed in accordance with paragraph 5.2.8.
(10) Insulation shall be covered with an additional protective sheet metal jacketing employing flat
sheeting to the requirements of Table 3.
(11) The panels shal
shalll be applied commencing at the bottom of the vessel. Each circumferential
ring of panels shall be tensioned by means of temporary tensioning bands until the final joint
is made. 'S' clips shall be used as additional sheeting supports at circumferential overlaps.
overlaps.
(12) The panels shall have a minimum overlap of 80mm on both horizontal and vertical edges.
The overlaps shall be arranged to shed water at all times.
(13) The panels shall be held tight to the vessel by means of circumferential bands and seals. The
bands sha
shallll be positioned on all horizontal overlaps and at 450mm max. centres.
(14) Over vessel heads the metal sheet shall be fabricated in an orange peel construction with all
radial seams overlapping a minimum of 25mm. Radius direction joints shall be double lap
seam
m joints and circumferential direction joints shall be folded seam joints to ensure the
sheeting does not become loose.
(15) All equipment projections shall have the jacketing sealed using metal flashing cut to fit the
projections.
(16) Insulation and vapour barrier on the bottom head of a vessel protected by a closed skirt shall
not require weather protection.
5.4
Horizontal Vessels and Pipe Greater than 900mm Diameter
(1) Insulation to the specified thickness shall be pre-formed
pre formed radiused and bevelled lags for
vessels shel
shells
ls and pipes, and pre
pre-formed
formed insulation sets for vessel heads.
(2) Insulation shall be applied starting with full length and half
half-lengths
lengths lags, with all
circumferential joints being staggered. When more than one layer is employed, the joints in
the second laye
layerr shall not match the joints in the previous layer.
(3) When applying Cellular Glass, the base of the inner layer shall be coated with a thin
application (to fill cells only) of anti abrasion compound and allowed to dry before application
of insulation to the surface.
(4) All joints of single or outermost layers of insulation, with the exception of contraction joints,
shall be buttered with the specific joint sealer before installation and then firmly butted
together.
(5) The applied insulation shall be secured in place
place with circumferential stainless steel bands in
accordance with Table 2 spaced at 220mm maximum centres.
(6) Heads of vessels shall be insulated with pre-formed
pre formed vessel head insulation sets. Where
fabrication is necessary the material shall be cleanly cut and sshaped
haped to closely follow the
contour of the head. The joints shall be buttered in accordance with paragraph 5.4.4. The
insulation shall be secured to the heads by bands drawn radially from the tan line
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circumferential body bands to a centralised floating ring
ring of 10mm diameter bar. The radial
bands shall be fastened to the body bands at 300mm centres and when attached to the
floating ring shall be tensioned in suitable sequence to ensure a positive securing of the
insulation material.
(7) The installed insulation shall be vapour sealed in accordance with specified requirements
(para 6.2.8).
(8) Horizontal cylindrical equipment shall be finished with flat metal jacket arranged in
circumferential bands with the longer dimension edge applied around the circumference of
the equipment insulation.
(9) The panels shall have a minimum of 80mm overlap on both longitudinal and circumferential
edges, both overlaps being finished with a 4mm minimum ball swage and rendered water
tight with a 4mm bead of metal seam sealer located in the ball swage.
(10) The jacketing shall be held tight to the vessel by means of circumferential bands and seals.
The band sizes and spacing shall be 20mm wide x 0.5mm thick bands on all circumferential
laps and at 300mm maximum centres.
(11) For vessel heads the metal sheet shall be fabricated in an 'orange peel’ construction with all
radial seams overlapping a minimum of 25mm. Radius direction joints shall be double lap
seam joints and circumferential direction joints shall be folded seam joints to ensure the
sheeting does not become loose.
(12) All equipment projections shall have the jacketing sealed using metal flashing cut to fit the
projections.
(13) Where applicable, exchangers shall be insulated, vapour sealed and clad as horizontal
vessels, with the exception that the ch
channel
annel cover and/or bonnet covers shall have removable
cladding in accordance with paragraph 5.1.20.
5.5
Acoustic Insulation
(1) Where cold insulation and acoustic insulation are required, the cold insulation system shall be
applied first to the pipe and the acous
acoustic
tic insulation shall be applied on top. To prevent
condensation at the interface between the two layers, a second vapour seal shall be applied
outside the porous layer of the acoustic insulation.
(2) The thickness of acoustic insulation material shall be as st
stated
ated in Table 6.
(3) The acoustic insulation material shall be applied in single or double layers as stated in Table
6. When applied in double layer the joints in individual layers shall be staggered. Fixing shall
be by 12mm wide stainless steel bands at 220mm maximum centres. The entire surface of
the acoustic insulation shall be sealed with reinforced vapour barrier mastic in accordance
with paragraph 5.2.8.
(4) The specified metallic cover finish shall be applied over the cold insulation and vapour barrier
in the
e manner described in Sections 5.2, 5.3 and 5.4.
(5) Care shall be taken to ensure that there is absolutely no direct contact between the piping
and equipment from which the noise is emitted, and the insulation metallic finish.
(6) Gaps between the outer metallic cover and protruding metal part shall be sealed with a
flexible, non setting, impervious seal, of material suitable for operating temperatures.
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(7) Rigid pipe supports shall be insulated down to the concrete or steel base where acoustic
insulation is required for Class B & C.
(8) Additional insulation shall be installed over steel support structures where vibration isolations
have been omitted.
(9) Where acoustic insulation of machinery is required, it shall meet the requirements of this
specification
specification.. The design shall be subject to review prior to commencement of insulation.
5.6
Fire Hazard Protection Insulation
(1) Where fire hazard protection insulation is required Cellular Glass shall be applied. The
general insulation application procedures shall be followed as described for piping and
equipment under Sections 6.2, 5.3 and 5.4 inclusive except that the insulation shall be
applied in a minimum of two layers.
(2) The inner layer shall be coated with adhesive and allowed to dry prior to the application of the
second layer.
(3) The me
metallic
tallic insulation finish over insulation used for fire hazard protection shall be
aluminised steel A463 in accordance with Table 3.
5.7
Contraction Joints
(1) Contraction joints shall be positioned in sufficient number and at such distance to allow the
contraction
raction of piping and equipment to take place without disturbance or damage occurring
within the insulating system. Contraction joints shall be determined based on the expected
movement. Joints on horizontal piping and equipment shall be installed at 6m max.
max. centres
and a minimum of one mid way between fixed points.
(2) On vertical piping and equipment contraction joints shall be provided directly below insulation
support rings where practical. The same method described for non vertical piping shall be
employed
employed,, with the added provision that the side of the contraction joint cover adhered to the
outer layer of insulation shall be above the contraction joint.
(3) Contraction joints on non vertical piping shall be provided using a 25mm wide break in the
insulation. Co
Contraction
ntraction joints in multi layers of insulation shall be positioned approximately
200mm apart. A layer of insulation sealer shall be applied to the mating surfaces between
layers in the area between contraction joints. All joints are to be packed with mineral
mineral fibre
in-fill
fill material compressed to 50% of its thickness. Single or outer layer insulation contraction
joints shall be covered with a 150mm by 25mm thick collar of insulation centred over the joint.
One side of this cover layer of insulation shall be fixed
fixed using insulation adhesive. The other
side is to be liberally coated with insulation sealer on the inner surface which mates to the
outer layer of insulation. A heavy fillet of insulation sealer shall be applied to the butt end of
the sealed side. Bands
Bands shall be used at each end of the contraction joint cover for security.
The mastic vapour barrier system shall be applied over the contraction joint cover.
(4) On vertical piping contraction joints shall be provided directly below insulation support rings
where
re practical. The same method described above for non
non-vertical
vertical piping shall be employed,
with the added provision that the side of the contraction joint cover adhered to the outer layer
of insulation shall be above the contraction joint.
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(5) Detailed drawings of contraction joint design shall be submitted for review, prior to execution
of the work.
6
TABLES
6.1
Table 1: Insulation, Classification and General Conditions of Use
Classification
Insulation
Insulation
Insulation
Thickness
Thickness
Symbol
Table
Selection
Reference
Service
Insulation
Material
Notes
Consideration
Without
Polyisocyanurate
Each defined
steam-out
out
(PIR)
section of
equipment
operating at
CC
different temps.
Prevention of
may be insulated
heat gain
Normal operating
(process lines)
where normal
operating
Table 4 or Table
temp of process
5
fluid and nominal
pipe size
temps. are
to suit its
individual temp.
With steam
steam-out
Cellular Glass
For shell and
tube exchanger
shells and
below 31ºC
channel use the
CC1
lower of the inlet
and outlet temps.
Personnel
protection
Over piping and
equipment
CP
provide open
Personnel
mesh metal
protection with
guards over
Stood off metal
-
guard
CPG
-
surfaces which
would normally
be left
uninsulated and
which may be
accessible. See
Note
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Title: Specification for Cold Service Insulation
Classification
Insulation
Insulation
Insulation
Thickness
Thickness
Symbol
Table
Selection
Reference
Contractor Doc. No.
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Service
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Page 22 of 50
Insulation
Material
Notes
Consideration
Selected
acoustic
insulation symbol
Acoustic
attenuation for
A
noise control at
B
various level of
C
requirement
Table 6
Acoustic
shall be added to
Category
any other
Attenuation
insulation symbol
subject to
that applies. If
calculated
no other
insertion loss
insulation
requirements
symbols apply,
acoustic symbols
A, B or C shall be
used alone
Note 1:
Symbology on P&
P&IDs
IDs shall indicate only the eligibility of the lines for Personnel Protection. The exact extent
shall be determined locally at site based on the criteria of exposed surfaces below minus 10ºC and located
within 600mm horizontally or 2100mm vertically of a n
normal
ormal access, walkway, or work area.
For personnel protection, pipe and equipment shall be preferably protected by stood off metal guard. Only
where this is not feasible, thermal insulation shall be installed.
Pipe and equipment designated for personnel pr
protection
otection shall be fully painted in accordance with the
Specification for Painting (S
(S-000--13A0-0001)
0001).
Basically CPG shall be applied. If CPG is not feasible CP (thermal insulation) shall be applied.
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Table 2: Insulation Form and Method of Securing
Item
Straight Pipe
Nominal Diameter (D) of
Insulation Material
Method of Securing
Item
Form
Insulation Material
Pre-formed
Pre
pipe
12mm wide stainless steel
sections
band
150mm ≤ D
Multi-piece
Multi piece pipe sections
D > 150mm
or radiused and bevelled
lags
All sizes
reducers
Bends and Elbows
band
Oversized sections and
Welded valves and
butt-weld
weld tees and
12mm wide stainless steel
lags as per "straight"
pipe cut and shaped to
As for "straight pipe"
fit
All sizes
As for "straight pipe" cut
As for "straight pipe"
and shaped to fit
Flanged Valves and
All sizes
Joints
Oversized sections and
As for "straight pipe"
lags as per "straight
pipe" cut and shaped to
fit
Equipment Heads
See Note
900mm > D
900mm ≤ D
750mm ≤ D
Equipment Shells
750mm < D ≤ 3600mm
D > 3600mm
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Flat blocks shaped to fit
20mm wide stainless steel
bands
Radiused and bevelled
20mm wide stainless steel
Head segments in sets
bands
As for "straight pipe" in
20mm wide stainless steel
sets
bands
Radiused and bevelled
20mm wide stainless steel
lags in sets
bands
Flat blocks shaped to fit
20mm wide stainless steel
in sets
bands
Employer Doc. No.
NSRP Complex Project
Title: Specification for Cold Service Insulation
Item
Nominal Diameter (D) of
Contractor Doc. No.
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Insulation Material Form
Item
Casings of Pumps,
Manholes and
All sizes
Material
Flat blocks cut and
Adhesive tape as necessary
shaped to fit.
to secure.
Exchanger Channel
and Bonnet Flanges
Note 1: Bottom heads enclosed with weather protective support skirt shall not require metal
cover finish.
Note 2: Adhesive tape used to secure all inner layers of insulation where applied to pipe
work and equipment in two layers, shall be a pressure
pressure-sensitive
sensitive glass fibre reinforced
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Method of Securing Insulation
Handholes,
tape 19mm wide.
Rev. 0
Employer Doc. No.
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Title: Specification for Cold Service Insulation
6.3
Rev. 0
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Table 3: Vapour Barrier, Metal Cover and Method of Securing
Item
Nominal Diameter
(D) of Item
200mm ≤ D
201mm < D ≤
Straight Pipe
450mm
450mm < D
Welded valves and
butt-weld
weld tees and
All sizes
reducers
Bends and Elbows
Flanged Valves and
Joints
All sizes
All sizes
Vapour Barrier
Two coats of
Metal Cover
Method of Securing
Thickness
Cover
0.5mm
continuous
membrane
0.8mm
steel band
reinforced
vapour barrier
mastic
As for “straight
pipe”
As for “straight
pipe”
As for “straight
pipe”
12mm wide stainless
0.9mm
As for “straight
pipe”
As for “straight
pipe”
As for “straight
pipe”
As for "straight pipe"
As for "straight pipe"
As for "straight pipe"
Two coats of
continuous
Equipment Heads
membrane
See Note 1
0.9mm
reinforced vapour
20mm wide stainless
steel bands
barrier mastic
Two coats of
continuous
Equipment Shells
All sizes
membrane
0.9mm
reinforced vapour
20mm wide stainless
steel bands
barrier mastic
Casings of Pumps,
Two coats of
Manholes and
continuous
Handholes,
All sizes
membrane
Exchanger Channel
reinforced vapour
and Bonnet Flanges
barrier mastic
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NSRP Complex Project
Title: Specification for Cold Service Insulation
Employer Doc. No.
Contractor Doc. No.
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Rev. 0
Page 26 of 50
Note 1: Bottom heads enclosed with weather protective support skirt shall not require metal cover finish.
Note 2: Adhesive tape used to secure all inner layers of insulation where applied to pipe work and equipment
in two layers, shall be a pressure-sensitive
pressure sensitive glass fibre reinforced tape 19mm wide.
Note: 3: Al
Alll cladding overlaps both longitudinal and circumferential shall be reinforced with a self adhesive,
crease resistant flashing tape covered with heavy duty aluminium foil and a high grade bitumen backing.
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Title: Specification for Cold Service Insulation
6.4
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Page 27 of 50
S
S-000-1390-000
0002V
Table 4: Insulation Thickness for Prevention of Heat
Heat Gain (PU / PIR)
Normal Operating Temperature (°C) and Thickness (mm)
Nominal Pipe Size
+31 to
-10
-11
11 to
-20
-21
21 to
-30
-31 to
-40
-41 to
-50
-51
51 to
-60
60
-61
61 to
-70
-71 to
-80
-81 to
-90
-91
91 to
-100
100
in
mm
1
25
40
50
50
60
70
70
80
80
90
90
1½
40
40
50
60
70
70
80
80
90
90
100
2
50
40
50
60
70
70
80
90
90
100
100
3
80
50
60
70
70
80
90
90
100
110
110
4
100
50
60
70
80
80
90
100
100
110
120
6
150
50
60
70
80
90
100
110
110
120
130
8
200
50
70
80
90
90
100
110
120
130
130
10
250
50
70
80
90
100
110
120
120
130
140
12
300
60
70
80
90
100
110
120
130
130
140
14
350
60
70
80
90
100
110
120
130
140
140
16
400
60
70
80
90
100
110
120
130
140
150
18
450
60
70
80
90
100
110
120
130
140
150
20
500
60
70
80
100
110
120
130
130
140
150
24
600
60
70
80
100
110
120
130
140
150
150
Flat
Flat
60
80
90
110
120
130
150
160
170
180
Single Layer
Design Basis:
Multi layers
Maximum Heat gain = 25w/m2
Ambient Temp.: 23.6ºC
Wind speed: 3.6 m/sec
Emissivity: 0.15
Humidity: 90%
Note 1:
80mm is the maximum single layer thickness above 80mm multilayer application is
required
Note 2:
Insulation thickness may have to be rounded up depending on what thicknesses
are commercially available
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Title: Specification for Cold Service Insulation
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Double and Triple Layer shall be constructed with layer thickness as follows:
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Thk
1st Layer
2nd Layer
3rd layer
90
50
40
100
50
50
110
50
60
120
30
40
50
130
30
50
50
140
40
50
50
150
50
50
50
160
50
60
50
170
50
60
60
180
60
60
60
Rev. 0
Page 28 of 50
Employer Doc. No.
NSRP Complex Project
Contractor Doc. No.
Title: Specification for Cold Service Insulation
6.5
Rev. 0
S
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Page 29 of 50
Table 5: Insulation Thickness for Prevention of Heat Gain (Cellular Glass)
Normal Operating Temperature (ºC) and Thickness (mm)
+31 to
-11
11 to
-21
21 to
-31 to
-41 to
-51
51 to
-61
61 to
-71 to
-81 to
-91
91 to
-10
-20
-30
-40
-50
--60
-70
-80
-90
-100
100
Nominal Pipe Size
in
mm
1
25
40
50
50
60
70
70
80
80
90
90
1½
40
40
50
60
70
70
80
80
90
90
100
2
50
40
50
60
70
70
80
90
90
100
100
3
80
50
60
70
70
80
90
90
100
110
1
110
4
100
50
60
70
80
80
90
100
100
110
120
6
150
50
60
70
80
90
100
110
110
120
130
8
200
50
70
80
90
90
100
110
120
130
130
10
250
50
70
80
90
100
110
120
120
130
140
12
300
60
70
80
90
100
110
120
130
130
140
14
350
60
70
80
90
100
11
110
120
130
140
140
16
400
60
70
80
90
100
11
110
120
130
140
150
18
450
60
70
80
90
100
11
110
120
130
140
150
20
500
60
70
80
100
110
120
130
130
140
150
24
600
60
70
80
100
110
120
130
140
150
150
Flat
Flat
60
80
90
110
120
130
150
160
170
180
Single Layer
Design Basis:
Multi layers
Maximum Heat gain = 25w/m2
Ambient Temp.: 23.6ºC
Wind speed: 3.6 m/sec
Emissivity: 0.15
Humidity: 90%
Note 1:
80mm is the maximum single layer thickness above 80mm multilayer application is
Required
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Title: Specification for Cold Service Insulation
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Double and Triple Layer shall be constructed with layer thickness as follows:
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Thk
1st Layer
2nd Layer
3rd layer
90
50
40
100
50
50
110
50
60
120
30
40
50
130
30
50
50
140
40
50
50
150
50
50
50
160
50
60
50
170
50
60
60
180
60
60
60
Rev. 0
Page 30 of 50
Employer Doc. No.
NSRP Complex Project
Contractor Doc. No.
Title: Specification for Cold Service Insulation
6.6
S
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Page 31 of 50
Table 6: Thickness of Acoustic Insulation
(1) The level of acoustic attenuation is indicated by the class symbol below as required by Table
1. Where acoustic symbol A, B or C is combined with thermal insulation for prevention of heat
gain the specified acoustic insulation thickness shall be applied together with the moisture
vapour barrier followed by the thermal insulation, thickness and moisture vapour barrier.
(2) When the following
following acoustic insulation cladding thickness requirements differ from the
thermal insulation protection sheeting requirements the greater of the two thicknesses shall
be selected. The metal cladding shall be applied last over the composite insulating system.
Minimum Thickness of
Class
Acoustic (Porous) Layer
Insulation
(mm)
Acoustic Insulation Cladding
Thickness
Cladding Material
(mm)
A
50
0.70
Aluminized Steel
B
100
0.70
Aluminized Steel
C
100 (in two 50 mm layers)
1.4 (in two 0.7 mm layers)
Aluminized Steel
(3) Classes A, B and C correspond to the classification given in S-000
000-1390-0001V
0001V “Specification
for Hot Service and Acoustic Insulation”
Insulation”.
(4) Class C attenuation may be achieved by applying two layers each of 50mm thick porous
insulation and 0.70mm thick sound barrier acoustic insulation cladding sequentially.
7
DOCUMENTATION
(1) The Insulation Contractor shall ensure that detailed method statements and quality plans are
submitted for Purchaser review and agreement, covering all insulation activities and shall
include, but not be limited to, the following:
 Programme of work schedules in sufficient detail to allow inspection planning
 Safe storage and handling of materials, safe disposal of unwanted materials.
 Insulation system to be used
 Written information identifying
identifying selected materials and manufacturers. (see note 1)
 Copies of manufacturer’s current data sheets for all materials
 Material delivery dates
 Documented experience list using the selected insulation system and materials (see note
1)
 Proposed insulation, cladding and fixing expansion details
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 Stood off personnel protection guard details. (see note 1)
 Removable flange and valve cover details for both metal box and flexible types. (see note
1)
 • QA/QC procedures for the work to be carried out.
 • Test and Inspection
Inspection procedures and plans. (see note 1)
 • Copy of proposed Inspection/Record Sheets.
 • Written information regarding temporary protection arrangements in the event of:
(a) Outdoor or partial outdoor application
(b) Application in the presence of other trades
(c) Site
te storage
Note 1: - This information shall also be submitted by the Insulation Contractor for Purchaser review and
agreement prior to contract awardDetails of proposed Tank insulation system.
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Title: Specification for Cold Service Insulation
8
FIGURES
8.1
Figure 1 : Piping
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Employer Doc. No.
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Title: Specification for Cold Service Insulation
Figure 1 ( Cont.)
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Employer Doc. No.
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Title: Specification for Cold Service Insulation
Figure 1 (Cont.)
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Employer Doc. No.
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Title: Specification for Cold Service Insulation
Figure 1 ( Cont.)
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Employer Doc. No.
NSRP Complex Project
Title: Specification for Cold Service Insulation
Figure 1 ( Cont.)
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NSRP Complex Project
Title: Specification for Cold Service Insulation
8.2
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Figure 2 : Removable Covers for Flanged Valves
Employer Doc. No.
Contractor Doc. No.
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Employer Doc. No.
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Contractor Doc. No.
Title: Specification for Cold Service Insulation
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Figure 2 (cont.)
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Contractor Doc. No.
Title: Specification for Cold Service Insulation
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Figure 2 (cont.)
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Contractor Doc. No.
Title: Specification for Cold Service Insulation
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Figure 2 (cont.)
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NSRP Complex Project
Title: Specification for Cold Service Insulation
8.3
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Figure 3: Details of Insulation Vapour Barrier and Metal Jacket on Vertical Vessels
Employer Doc. No.
NSRP Complex Project
Contractor Doc. No.
Title: Specification for Cold Service Insulation
S
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Figure 3 (cont.)
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Figure 3 (cont.)
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NSRP Complex Project
Title: Specification for Cold Service Insulation
8.4
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Figure 4 : Details of Insulation , Vapour Barrier and Metal Jacket on Horizontal Vessels
Employer Doc. No.
NSRP Complex Project
Contractor Doc. No.
Title: Specification for Cold Service Insulation
S
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Figure 4 (cont.)
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Figure 4 (cont.)
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Title: Specification for Cold Service Insulation
8.5
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Figure 5: Acoustic Insulation End Cap Fabrication Details
Rev. 0
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NSRP Complex Project
Title: Specification for Cold Service Insulation
8.6
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Figure 6 : Acoustic Insulation Support , Classes B &C
Rev. 0
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NSRP Complex Project
Title: Specification for Cold Service Insulation
8.7
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Figure 7 : Personnel Protection
Employer Doc. No.
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