COMPLETE REVISION
April 1999
Process Industry Practices
Insulation
PIP INEG1000
Insulation Design and Type Codes
PURPOSE AND USE OF PROCESS INDUSTRY PRACTICES
In an effort to minimize the cost of process industry facilities, this Practice has
been prepared from the technical requirements in the existing standards of major
industrial users, contractors, or standards organizations. By harmonizing these technical
requirements into a single set of Practices, administrative, application, and engineering
costs to both the purchaser and the manufacturer should be reduced. While this Practice
is expected to incorporate the majority of requirements of most users, individual
applications may involve requirements that will be appended to and take precedence over
this Practice. Determinations concerning fitness for purpose and particular matters or
application of the Practice to particular project or engineering situations should not be
made solely on information contained in these materials. The use of trade names from
time to time should not be viewed as an expression of preference but rather recognized as
normal usage in the trade. Other brands having the same specifications are equally
correct and may be substituted for those named. All practices or guidelines are intended
to be consistent with applicable laws and regulations including OSHA requirements. To
the extent these practices or guidelines should conflict with OSHA or other applicable
laws or regulations, such laws or regulations must be followed. Consult an appropriate
professional before applying or acting on any material contained in or suggested by the
Practice.
© Process Industry Practices (PIP), Construction Industry Institute, The
University of Texas at Austin, 3208 Red River Street, Suite 300, Austin,
Texas 78705. PIP member companies may copy this practice for their internal
use.
12/97 Issued
4/99
Complete Revision
Not printed with State funds
COMPLETE REVISION
April 1999
Process Industry Practices
Insulation
PIP INEG1000
Insulation Design and Type Codes
Table of Contents
1. Introduction...........................................2
1.1 Purpose ............................................2
1.2 Scope ...............................................2
2. References.............................................2
2.1 Process Industry Practices (PIP) .......2
2.2 Industry Codes and Standards ..........2
3. Use of Insulation Type Codes ..............3
4. Insulation Type Codes..........................3
4.1 Hot Insulation Types .........................3
4.2 Cold Insulation Types........................4
4.3 Insulation Types For Traced and
Energy Transfer Jacketed Systems...5
4.4 AC - Acoustic Control Insulation........6
4.5 FP - Fire Protection Insulation...........6
5. Ranking of Insulation Materials ...........6
5.1 Insulation Materials ...........................6
5.2 Ranking of Hot Insulation Material ....7
5.3 Ranking of Cold Insulation Material...7
6. Thickness Tables ..................................8
6.1 Hot Insulation Thickness Tables........8
6.2 Cold Insulation Thickness Tables ......8
Index of Tables
INEG1006 - Thickness of Cellular Glass Insulation Combined Table
INEG1007 - Thickness of Fiberglass Insulation for HC
INEG1008 - Thickness of Fiberglass Insulation for PP
INEG1009 - Thickness of Fiberglass Insulation - Combined
Table
INEG1010 - Thickness of Mineral Wool Fiber Insulation for
HC
INEG1011 - Thickness of Mineral Wool Fiber Insulation for
PP
INEG1012 - Thickness of Mineral Wool Fiber Insulation Combined Table
INEG1013 - Thickness of Expanded Perlite Insulation for
HC
INEG1014 - Thickness of Expanded Perlite Insulation for PP
INEG1015 - Thickness of Expanded Perlite Insulation Combined Table
INEG1016 - Thickness of Polyisocyanurate Insulation for
HC
INEG1017 - Thickness of Polyisocyanurate Insulation for PP
Cold Insulation Thickness Tables
INEG1051 - Thickness of Cellular Glass Insulation for CC
INEG1052 - Thickness of Cellular Glass Insulation for CP
INEG1053 - Thickness of Cellular Glass Insulation Combined Table
INEG1054 - Thickness of Polyisocyanurate Insulation for
CC
INEG1055 - Thickness of Polyisocyanurate Insulation for
CP
INEG1056 - Thickness of Polyisocyanurate Insulation Combined Table
Hot Insulation Thickness Tables:
INEG1001 - Thickness of Calcium Silicate Insulation for HC
INEG1002 - Thickness of Calcium Silicate Insulation for PP
INEG1003 - Thickness of Calcium Silicate Insulation Combined Table
INEG1004 - Thickness of Cellular Glass Insulation for HC
INEG1005 - Thickness of Cellular Glass Insulation for PP
Process Industry Practices
Page 1 of 33
PIP INEG1000
Insulation Design and Type Codes
1.
COMPLETE REVISION
April 1999
Introduction
1.1
Purpose
The purpose of this Practice is to provide requirements for the design of insulation
systems.
1.2
2.
Scope
1.2.1
This Practice covers the definitions and design requirements for types of
insulation systems that are indicated by the type code on the Piping and
Instrumentation Diagrams (P&IDs), data sheets, and other design documents.
1.2.2
Corrosion protection under insulation is not addressed in this Practice.
References
When adopted in this Practice, the latest edition of the following codes, standards,
specifications and references in effect on the date of contract award shall be used, except as
otherwise specified. Short titles will be used herein when appropriate.
2.1
2.2
Process Industry Practices (PIP)
–
PIP INSC1000 - Requirements for Cold Service Insulation Materials
–
PIP INSC2000 - Installation of Cold Service Insulation Systems
–
PIP INSH1000 - Requirements for Hot Service Insulation Materials
–
PIP INSH2000 - Installation of Hot Service Insulation Systems
Industry Codes and Standards
•
American Petroleum Institute (API)
–
•
Page 2 of 33
API RP521 - Guide for Pressure-Relieving and Depressuring Systems
American Society of Testing and Materials (ASTM)
–
ASTM C533 - Standard Specification for Calcium Silicate Block and Pipe
Thermal Insulation
–
ASTM C547 - Standard Specification for Mineral Fiber Pipe Insulation
–
ASTM C552 - Standard Specification for Cellular Glass Thermal Insulation
–
ASTM C591 - Standard Specification for Unfaced Preformed Rigid Cellular
Polyisocyanurate Thermal Insulation
–
ASTM C610 - Standard Specification for Molded Expanded Perlite Block and
Pipe Thermal Insulation
–
ASTM C680 - Standard Practice for Determination of Heat Gain or Loss and
the Surfaces Temperatures of Insulated Pipe and Equipment Systems by the
Use of a Computer Program
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
•
North American Insulation Manufacturers Association (NAIMA)
–
3.
4.
3E PLUS Insulation Thickness Computer Program
Use of Insulation Type Codes
3.1
Insulation codes shall be used on P&IDs, data sheets, piping isometrics, and other
project documents.
3.2
Insulation type codes consist of up to four characters. The first two of which are
defined in Section 4. The second two characters may be used to define additional
requirements such as combination systems or special requirements.
Insulation Type Codes
4.1
Hot Insulation Types
4.1.1
4.1.2
4.1.3
Process Industry Practices
HC - Heat Conservation Insulation
4.1.1.1
Heat conservation insulation shall be designated with the code HC.
4.1.1.2
The primary consideration for using heat conservation insulation
shall be economics.
4.1.1.3
Design of heat conservation insulation shall be based on local
average ambient climatic conditions and project economics.
4.1.1.4
Heat conservation insulation shall be used if normal operating
temperature exceeds 140° F (60° C), unless loss of heat is desirable.
PS - Process Stability Insulation
4.1.2.1
Process stability insulation shall be designated with the code PS.
4.1.2.2
The primary consideration for using process stability insulation
shall be control of process temperatures, including impact due to
sudden changes in ambient conditions.
4.1.2.3
Design of process stability insulation shall be based on anticipated
extremes in ambient conditions.
PP - Personnel Protection Insulation
4.1.3.1
Personnel protection insulation shall be designated with the code
PP.
4.1.3.2
The primary consideration for using personnel protection insulation
shall be to limit the temperature of exposed surfaces.
4.1.3.3
Design of personnel protection insulation shall be based on summer
dry bulb temperature and low wind velocity to reflect a worst case
condition.
4.1.3.4
Personnel protection insulation shall be used if normal temperature
of a surface exceeds 140° F (60° C) and if the surface is in an area
Page 3 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
that is accessible to personnel. Accessible area is defined as an area
in which personnel regularly perform duties other than maintenance
during plant operation.
4.1.4
4.2
Personnel protection shall be provided to 7 feet (2.13 m) above
grade or platforms and 3 feet (0.91 m) horizontally from the
periphery of platforms, walkways, or ladders.
4.1.3.6
Personnel protection shall consist of insulation, shields, guards or
barriers.
4.1.3.7
If corrosion under the insulation is a concern, or if heat loss is
desirable, use of fabricated shields/guards in lieu of insulation
should be considered.
PF - Prevention From Freezing Insulation
4.1.4.1
Freeze prevention insulation shall be designated with the code PF.
4.1.4.2
The primary consideration for the use of this category is protection
from freezing.
4.1.4.3
Design of prevention from freezing insulation shall be based on
local climatic conditions.
4.1.4.4
Prevention from freezing insulation may be combined with other
types of insulation.
Cold Insulation Types
4.2.1
4.2.2
Page 4 of 33
4.1.3.5
CC - Cold Service Insulation
4.2.1.1
Cold service insulation shall be designated with the code CC.
4.2.1.2
The primary consideration for using cold service insulation shall be
based on maximum allowable heat gain.
4.2.1.3
The design of cold service insulation shall be based on control of
heat gain and limiting surface condensation when the operating
temperature is below ambient.
4.2.1.4
Cold service insulation shall be sealed against atmospheric moisture
intrusion and subsequent wetting/icing of the insulation. Sealing
normally involves special consideration for design of equipment and
insulation support details.
CP - Condensation Control Insulation
4.2.2.1
Condensation control insulation shall be designated with the code
CP.
4.2.2.2
The only consideration for use of condensation control insulation
shall be control of external surface condensation.
4.2.2.3
Design of condensation control insulation shall be based on the
normal operating temperature and local climatic conditions. In some
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
humid climates it is impractical to prevent condensation 100% of
the time.
4.2.2.4
4.3
Use of surface finishes to control surface emissivity may be
considered to reduce insulation thickness.
Insulation Types For Traced and Energy Transfer Jacketed Systems
4.3.1
4.3.2
General Considerations
4.3.1.1
The primary consideration for using tracing or heat transfer
jacketing and associated insulation shall be control of process
temperatures.
4.3.1.2
Design of insulation shall be based on the operating temperature,
heat transfer jacketing temperature, or the tracer temperature. The
same insulation thickness as that for heat conservation (HC) or cold
service (CC), as appropriate, shall be used unless design
optimization dictates a different thickness.
4.3.1.3
Optimization of the tracer or heat transfer jacketing design and
insulation thickness shall be required when specified.
4.3.1.4
Oversize insulation shall be considered to accommodate tracer(s) or
heat transfer jacketing.
4.3.1.5
Grooving of insulation to accommodate tracing will not be allowed
unless specified by the Purchaser.
ET - Electric Traced
Electric tracing and associated insulation shall be designated with the code
ET.
4.3.3
ST - Steam Traced
Steam tracing and associated insulation shall be designated with the code ST.
4.3.4
SJ - Steam Jacketed
Steam jacketing and associated insulation shall be designated with the code
SJ.
4.3.5
HT - Hot Fluid Traced
Hot fluid tracing (except steam) and associated insulation shall be designated
with the code HT.
4.3.6
HJ - Hot Fluid Jacketed
Hot fluid jacketing and associated insulation shall be designated with the code
HJ.
4.3.7
CT - Chilled Fluid Traced
Chilled fluid tracing and associated insulation shall be designated with the
code CT.
Process Industry Practices
Page 5 of 33
PIP INEG1000
Insulation Design and Type Codes
4.3.8
COMPLETE REVISION
April 1999
CJ - Chilled Fluid Jacketed
Chilled fluid jacketing and associated insulation shall be designated with the
code CJ.
4.4
4.5
5.
AC - Acoustic Control Insulation
4.4.1
Acoustic control insulation shall be designated with the code AC.
4.4.2
The primary consideration for use of acoustic control insulation shall be
control of noise.
4.4.3
Normally, acoustic control insulation shall have a dedicated design for each
application.
4.4.4
Special consideration of insulation materials and jacketing is normally
required.
4.4.5
Acoustic control insulation may be combined with other types of insulation.
FP - Fire Protection Insulation
4.5.1
Fire protection insulation shall be designated with the code FP.
4.5.2
The primary consideration for use of fire protection insulation shall be control
of the rate of heat gain in a fire.
4.5.3
Design of fire protection insulation shall be based on maximum allowable heat
gain, fire case characteristics, allowable time duration, and process
characteristics. Refer to API RP521 for materials selection and design criteria.
4.5.4
Fire protection insulation may be combined with other types of insulation.
Ranking of Insulation Materials
5.1
Page 6 of 33
Insulation Materials
5.1.1
Insulation materials have been ranked relative to each other in the tables in
Sections 5.2 and 5.3. Rankings are based on PIP member company consensus,
with 1 being the best.
5.1.2
While the categories in which the materials are ranked are design criteria that
may be important to a project, all possible design criteria cannot be included.
This information is supplied to assist the designer in selecting the most
appropriate material type for a project’s application. This Practice does not
attempt to weigh the various design criteria because criteria vary from project
to project.
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
5.2
Ranking of Hot Insulation Material
Design Criteria (1 = Best)
Insulation
Material
Temp.
Range
Fire
Protection
Mechanical
Abuse
Absorption
Installed
Cost
Tracing
Vibration
Calcium
Silicate
Ambient
to 1200° F
(649° C)
1
1
6
4
5
4
Cellular
Glass
Ambient
to 800° F
(427° C)
3
3
1
6
6
6
Perlite
Ambient
to 1200° F
(649° C)
2
2
2
5
2
5
Mineral
Wool
Ambient
to 1200° F
(649° C)
4
5
4
3
3
1
Glass
Fiber
Ambient
to 850° F
(454° C)
5
6
5
2
4
2
Polyisocyanurate
Ambient
to 225° F
(107° C)
NR
4
3
1
1*
3
NR = Not Recommended
5.3
* = Note Temperature Limit
Ranking of Cold Insulation Material
Design Criteria (1 = Best)
Insulation
Material
Cellular
Glass
Polyisocyanurate
Temp.
Range
Ambient
to -290° F
(-178° C)
Ambient
to -40° F
(-40° C)
NR = Not Recommended
Process Industry Practices
Fire
Mechanical
Installed
Absorption
Protection
Abuse
Cost
Tracing
Vibration
Permeability
1
1
1
2
2
2
1
NR
2
2
1
1*
1
2
* = Note Temperature Limit
Page 7 of 33
PIP INEG1000
Insulation Design and Type Codes
6.
COMPLETE REVISION
April 1999
Thickness Tables
6.1
6.2
Page 8 of 33
Hot Insulation Thickness Tables
6.1.1
Table A design parameters were used to compute the economic and personnel
protection thicknesses shown in the Hot Insulation Thickness Tables.
6.1.2
Table A and the thickness tables are based on Gulf Coast (USA) conditions.
Users shall determine if these economic and climatic conditions are applicable
to their specific location.
6.1.3
For Hot Insulation Thickness Tables, see Tables INEG1001 through
INEG1017.
6.1.4
Thicknesses alone should not be used to select the insulation material type.
Cold Insulation Thickness Tables
6.2.1
Table B design parameters were used to compute the thicknesses shown in the
Cold Insulation Thickness Tables. Heat gain and condensation control were
considered.
6.2.2
Table B and the thickness tables are based on Gulf Coast (USA) conditions.
Users shall determine if these heat gain and climatic conditions are applicable
to their specific location.
6.2.3
For Cold Insulation Thickness Tables, see Tables INEG1051 through
INEG1056.
6.2.4
Thicknesses alone should not be used to select the insulation material type.
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
Table A
Hot Insulation Thickness – 1998 Design Parameters
Interest Rate
Effective Income Tax
Annual Insulation Maintenance
Annual Physical Plant Maintenance
Annual Fuel Inflation Rate
12%
30%
2%
1%
4%
Physical Plant Annual Operating Hours
8320 hr/year
Physical Plant Depreciation Period
New Insulation Depreciation Period
10 years
4 years
First Year Cost of Energy
Incremental Equipment Investment Rate
3.00 $/MMBtu
3.50 $/MMBtu/hr
Average Annual Ambient Temperature
69° F (21° C)
Average Annual Wind Speed
5 mph
Personnel Protection Design Wind Speed
2 mph
Personnel Protection Design Summer Dry Bulb
Temperature
Personnel Protection Maximum Surface Temperature
95° F (35° C)
140° F (60° C)
Emittance of Existing Surface
Emittance of Jacketing
0.8
0.4
Design Factor for Thermal Conductivity
1.0
Design Factor for Piping Complexity
Minimum Insulation Design Thickness
1.2 simple
1.5 in. (3.81 cm)
Labor Rate
Productivity Factor
38.35 $/hr
100.00
Horizontal Pipe and Vertical Equipment
Insulation Cost Estimated by Federal Energy Administration (FEA) Method
Materials and
Accessories
Calcium Silicate
Cellular Glass
Mineral Wool Fiber
Expanded Perlite
Polyisocyanurate
Fiber Glass
ASTM
C533 Type 1
C552
C547 Type II
C610
C591
C547 Type I
2 x 2 Pipe
Insulation
$/linear foot
3.81
5.62
3.11
4.06
3.50
2.35
2" Block
Insulation
$/sq. foot
3.04
4.49
2.49
3.24
2.80
1.90
Maximum
Service
Temp., ° F
1200
800
1200
1200
225
850
Reference: ASTM C680, Available from ASTM, Philadelphia, Pa.
3E PLUS Insulation Thickness Computer Program ver. 2.0, Copyright North America Insulation Manufacturers
Association (NAIMA).
Notes:
1. Thickness tables calculated using 3E PLUS Insulation Thickness Computer Program. Data edited to
indicate 1-1/2 in. minimum thickness and to resolve thickness discontinuities.
2. Compared to plain aluminum jacketing, the higher emissivity of coated aluminum jacketing will reduce
the surface temperatures on hot insulation systems.
Process Industry Practices
Page 9 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
Table B
Cold Insulation Thickness – 1998 Design Parameters
Design Ambient Temperature
Design Dew Point Temperature
Design Maximum Heat Gain – Insulation Surface
Design Relative Humidity
Design Wind Speed
85o F (29o C)
78o F (26o C)
10 Btu/hr-ft2
80%
5 mph
Emittance of Existing Surface
Emittance of Jacketing - Cold Service (CC)
Emittance of Jacketing - Condensation Control (CP)
0.8
0.4
0.4
Design Factor for Thermal Conductivity
1.0
Minimum Insulation Design Thickness
1.5 inches
Horizontal Pipe and Vertical Equipment
Materials and
Accessories
Cellular Glass
Polyisocyanurate
ASTM
Minimum Service
Temp., ° F
C552
C591
-450
-40
Reference: ASTM C680, Available from ASTM, Philadelphia, Pa.
3E Plus Insulation Thickness Computer Program ver. 2.11, Copyright North America Insulation Manufacturers
Association (NAIMA)
Notes:
1. Thickness tables calculated using 3E PLUS Insulation Thickness Computer Program. Data edited to
resolve thickness discontinuities.
2. Minimum thickness of polyisocyanurate for temperatures less than 0° F is 2” to force multi-layer.
3. Compared to plain aluminum jacketing, the higher emissivity of coated aluminum jacketing requires less
insulation thickness to resist condensation formation.
Page 10 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1001
Thickness of Calcium Silicate Insulation for HC
ASTM C533 Type I
Economic Thickness of Insulation - Inches
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
To
150
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
6
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
4.0
4.0
8
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
10
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
14
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
16
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
18
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
20
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
24
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
30
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
36
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
Flat
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
Process Industry Practices
Page 11 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1002
Thickness of Calcium Silicate Insulation for PP
ASTM C533 Type I
Minimum Insulation Thickness
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.5
4.0
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.5
4.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
5.0
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.5
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
4.5
5.0
5.5
6.0
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.0
3.5
4.0
4.0
4.5
4.5
5.0
5.0
6.0
6.5
6
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.0
6.5
7.0
8
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.0
6.5
7.0
7.5
10
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
3.5
4.0
4.5
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.5
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
8.0
8.5
14
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.0
5.5
6.0
6.5
6.5
7.0
8.0
8.5
16
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
18
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.5
9.0
20
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
7.5
8.5
9.0
24
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
30
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.0
9.0
9.5
36
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
7.5
8.0
9.0
10.0
Flat
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
8.0
8.5
9.0
9.5
Page 12 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1003
Thickness of Calcium Silicate Insulation – Combined Table
ASTM C533 Type I
Economic Thickness Required
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.5
4.0
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.5
4.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
5.0
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.5
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
4.5
5.0
5.5
6.0
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.0
3.5
4.0
4.0
4.5
4.5
5.0
5.0
6.0
6.5
6
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.0
6.5
7.0
8
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.0
6.5
7.0
7.5
10
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
3.5
4.0
4.5
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.5
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
8.0
8.5
14
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.0
5.5
6.0
6.5
6.5
7.0
8.0
8.5
16
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
18
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.5
9.0
20
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
7.5
8.5
9.0
24
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
30
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.0
9.0
9.5
36
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
7.5
8.0
9.0
10.0
Flat
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
8.0
8.5
9.0
9.5
Process Industry Practices
Page 13 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1004
Thickness of Cellular Glass Insulation for HC
ASTM C552
Economic Thickness of Insulation - Inches
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
To
150
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.0
6
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
8
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
10
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.0
3.0
3.0
4.0
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
4.0
3.0
4.0
14
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
16
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.0
3.0
4.0
4.0
4.0
18
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
20
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
24
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
30
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
40.
36
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
Flat
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
Page 14 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1005
Thickness of Cellular Glass Insulation for PP
ASTM C552
Maximum Insulation Thickness
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
6
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
8
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
10
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
6.0
14
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
3.5
4.0
5.0
5.5
6.0
16
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.0
4.5
5.5
6.0
18
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
20
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
24
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.5
30
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.5
6.0
6.5
36
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
4.0
5.0
5.5
6.0
6.5
Flat
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
4.0
5.0
5.5
6.0
6.5
Process Industry Practices
Page 15 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1006
Thickness of Cellular Glass Insulation – Combined Table
ASTM C552
Economic Thickness Required
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
6
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
8
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
10
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
6.0
14
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
4.0
5.0
5.5
6.0
16
1.5
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.5
4.0
4.0
4.5
5.5
6.0
18
1.5
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
20
1.5
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
24
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.5
30
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.5
6.0
6.5
36
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
4.0
5.0
5.5
6.0
6.5
Flat
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
4.0
5.0
5.5
6.0
6.5
Page 16 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1007
Thickness of Fiberglass Insulation for HC
ASTM C547 Type I
Economic Thickness of Insulation - Inches
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
To
150
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
6
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
8
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
10
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
12
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
14
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
16
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
18
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
20
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
24
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
30
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
36
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
Flat
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
Process Industry Practices
Page 17 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1008
Thickness of Fiberglass Insulation for PP
ASTM C547 Type I
Minimum Insulation Thickness
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
6
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
8
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
10
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
12
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
14
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.0
5.0
16
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
18
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
20
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
24
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.0
4.5
5.0
30
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.0
5.0
5.5
36
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Flat
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
Page 18 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1009
Thickness of Fiberglass Insulation – Combined Table
ASTM C547 Type I
Economic Thickness Required
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
3.0
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.5
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.5
6
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
3.0
3.5
3.5
4.0
8
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
3.0
3.5
3.5
4.0
10
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.5
12
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
3.0
3.5
3.5
4.0
4.5
14
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.0
5.0
16
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.5
5.0
18
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
20
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
24
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.5
4.0
4.0
4.5
5.0
30
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.5
4.0
4.0
5.0
5.5
36
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Flat
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.5
5.0
Process Industry Practices
Page 19 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1010
Thickness of Mineral Wool Fiber Insulation for HC
ASTM C547 Type II or III
Economic Thickness of Insulation - Inches
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
To
150
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
6
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
3.5
4.0
4.0
4.0
8
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
3.5
4.0
4.0
4.0
10
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
3.5
4.0
4.0
4.0
4.0
4.0
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
3.0
3.5
4.0
4.0
4.0
4.0
4.0
4.0
4.0
14
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
16
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
18
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
2.5
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
20
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
24
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
30
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
36
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
Flat
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
Page 20 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1011
Thickness of Mineral Wool Fiber Insulation for PP
ASTM C547 Type II or III
Minimum Insulation Thickness
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.5
4.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
3.5
3.5
4.0
4.5
5.0
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
5.0
5.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.0
4.5
4.5
5.5
6.0
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.0
6.0
6.5
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.5
7.0
6
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.5
8.0
8
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
6.5
8.0
8.5
10
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.0
5.5
6.0
6.5
7.0
8.0
9.0
12
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.5
9.0
14
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.0
5.0
5.0
5.5
6.0
6.5
7.0
7.5
8.5
9.5
16
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
9.0
9.5
18
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
9.0
9.5
20
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
9.0
10.0
24
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
9.5
10.0
30
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
3.0
4.0
4.0
4.0
5.0
5.5
5.5
6.0
6.5
7.5
8.0
8.5
10.0
10.5
36
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
10.0
11.0
Flat
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.5
7.0
7.5
8.0
9.0
10.0
11.0
Process Industry Practices
Page 21 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1012
Thickness of Mineral Wool Fiber Insulation – Combined Table
ASTM C547 Type II or III
Economic Thickness Required
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.5
4.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
3.5
3.5
4.0
4.5
5.0
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
5.0
5.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.0
4.5
4.5
5.5
6.0
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.0
6.0
6.5
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.5
7.0
6
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.5
8.0
8
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
6.5
8.0
8.5
10
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.0
5.5
6.0
6.5
7.0
8.0
9.0
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.5
9.0
14
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.0
5.0
5.0
5.5
6.0
6.5
7.0
7.5
8.5
9.5
16
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
9.0
9.5
18
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
9.0
9.5
20
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
9.0
10.0
24
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
9.5
10.0
30
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
4.0
4.0
4.0
5.0
5.5
5.5
6.0
6.5
7.5
8.0
8.5
10.0
10.5
36
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
10.0
11.0
Flat
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.5
7.0
7.5
8.0
9.0
10.0
11.0
Page 22 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1013
Thickness of Expanded Perlite Insulation for HC
ASTM C610
Economic Thickness of Insulation - Inches
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
To
150
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
6
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
4.0
4.0
8
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
10
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
12
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
14
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
16
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
18
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
20
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
24
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
30
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
36
1.5
1.5
2.0
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
Flat
1.5
1.5
2.0
2.0
2.0
2.5
2.5
2.5
3.0
3.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
Process Industry Practices
Page 23 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1014
Thickness of Expanded Perlite Insulation for PP
ASTM C610
Minimum Insulation Thickness
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.5
4.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
5.0
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
4.5
5.0
5.0
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.0
6.0
6.0
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
4.5
5.0
5.5
6.0
6.5
3
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.0
7.0
7.5
4
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.0
6.5
7.5
8.0
6
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.0
8.0
8.5
8
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.0
7.5
8.5
9.0
10
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.5
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
9.0
9.5
12
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.0
14
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.0
16
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.5
18
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
10.0
10.5
20
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
10.0
10.5
24
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.5
11.0
30
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.5
8.0
8.5
9.0
9.5
11.0
11.5
36
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.0
11.0
12.0
Flat
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
7.0
7.5
8.0
9.0
9.5
10.5
11.5
12.0
Page 24 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1015
Thickness of Expanded Perlite Insulation - Combined Table
ASTM C610
Economic Thickness Required
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
251
to
300
301
to
350
351
to
400
401
to
450
451
to
500
501
to
550
551
to
600
601
to
650
651
to
700
701
to
750
751
to
800
801
to
850
851
to
900
901
to
950
951
to
1000
1001
to
1050
1051
to
1100
1101
to
1150
1151
to
1200
½
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.5
4.5
¾
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
5.0
1
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
4.5
5.0
5.0
1-1/2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.0
6.0
6.0
2
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
4.5
5.0
5.5
6.0
6.5
3
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.0
7.0
7.5
4
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.0
5.5
6.0
6.5
7.5
8.0
6
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.0
8.0
8.5
8
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.0
7.5
8.5
9.0
10
1.5
1.5
1.5
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.5
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
9.0
9.5
12
1.5
1.5
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.0
14
1.5
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.0
16
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.5
18
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
10.0
10.5
20
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
10.0
10.5
24
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.5
11.0
30
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.5
8.0
8.5
9.0
9.5
11.0
11.5
36
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.5
4.0
4.0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.5
10.0
11.0
12.0
Flat
1.5
1.5
2.0
2.0
2.0
2.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
7.0
7.5
8.0
9.0
9.5
10.5
11.5
12.0
Process Industry Practices
Page 25 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1016
Thickness of Polyisocyanurate Insulation for HC
ASTM C591
Economic Thickness of Insulation - Inches
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
To
150
151
to
200
201
to
250
½
1.5
1.5
1.5
¾
1.5
1.5
1.5
1
1.5
1.5
1.5
1-1/2
1.5
1.5
1.5
2
1.5
1.5
1.5
3
1.5
1.5
1.5
4
1.5
1.5
1.5
6
1.5
1.5
1.5
8
1.5
1.5
1.5
10
1.5
1.5
1.5
12
1.5
1.5
1.5
14
1.5
1.5
1.5
16
1.5
1.5
1.5
18
1.5
1.5
1.5
20
1.5
1.5
1.5
24
1.5
1.5
1.5
30
1.5
1.5
1.5
36
1.5
1.5
1.5
Flat
1.5
1.5
1.5
Page 26 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1017
Thickness of Polyisocyanurate Insulation for PP
ASTM C591
Minimum Insulation Thickness
to Limit Maximum Surface Temperature to 140° F
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
>140
151
to
200
201
to
250
½
1.5
1.5
1.5
¾
1.5
1.5
1.5
1
1.5
1.5
1.5
1-1/2
1.5
1.5
1.5
2
1.5
1.5
1.5
3
1.5
1.5
1.5
4
1.5
1.5
1.5
6
1.5
1.5
1.5
8
1.5
1.5
1.5
10
1.5
1.5
1.5
12
1.5
1.5
1.5
14
1.5
1.5
1.5
16
1.5
1.5
1.5
18
1.5
1.5
1.5
20
1.5
1.5
1.5
24
1.5
1.5
1.5
30
1.5
1.5
1.5
36
1.5
1.5
1.5
Flat
1.5
1.5
1.5
Process Industry Practices
Page 27 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1051
Thickness of Cellular Glass Insulation for CC
ASTM C552
Thickness of Insulation
to Limit Heat Gain to 10 Btu/hr-ft2
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
50
49
to
25
24
to
0
-1
to
-25
-26
to
-50
-51
to
-75
-76
to
-100
-101
to
-125
-126
to
-150
-151
to
-175
-176
to
-200
-201
to
-225
-226
to
-250
-251
to
-275
-276
to
-290
½
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
3.5
3.5
4.0
4.0
¾
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
4.5
1
1.5
1.5
2.0
2.0
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.0
4.0
4.5
4.5
1-1/2
1.5
1.5
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
4.5
5.0
5.0
2
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.0
4.0
4.0
4.5
4.5
5.0
5.0
3
1.5
1.5
2.0
2.5
3.0
3.5
3.5
4.0
4.0
4.5
4.5
5.0
5.0
5.5
5.5
4
1.5
1.5
2.5
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.0
5.5
5.5
6.0
6.0
6
1.5
1.5
2.5
3.0
3.0
3.5
4.0
4.5
4.5
5.0
5.5
6.0
6.0
6.5
6.5
8
1.5
1.5
2.5
3.0
3.0
3.5
4.0
4.5
4.5
5.0
5.5
6.0
6.0
6.5
7.0
10
1.5
1.5
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
6.5
7.0
7.0
12
1.5
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.0
5.5
6.0
6.5
6.5
7.0
7.0
14
1.5
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
7.5
7.5
16
1.5
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.0
6.5
7.0
7.5
7.5
18
1.5
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.0
7.5
7.5
20
1.5
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.0
7.5
8.0
24
1.5
1.5
2.5
3.0
3.5
4.5
5.0
5.5
5.5
6.0
6.5
7.0
7.5
8.0
8.0
30
1.5
1.5
2.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
6.5
7.0
7.5
8.0
8.5
36
1.5
1.5
2.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
7.5
8.0
8.5
48 to Flat
1.5
1.5
2.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
Page 28 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1052
Thickness of Cellular Glass Insulation for CP
ASTM C552
Minimum Insulation Thickness for Horizontal Pipe
to Limit Surface Condensation
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
50
49
to
25
24
to
0
-1
to
-25
-26
to
-50
-51
to
-75
-76
to
-100
-101
to
-125
-126
to
-150
-151
to
-175
-176
to
-200
-201
to
-225
-226
to
-250
-251
to
-275
-276
to
-290
½
1.5
1.5
1.5
2.0
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
¾
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.0
4.0
1
1.5
1.5
1.5
2.0
2.0
2.5
3.0
3.5
3.5
3.5
3.5
4.0
4.0
4.5
4.5
1-1/2
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.5
3.5
4.0
4.0
4.5
4.5
4.5
4.5
2
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.0
4.5
4.5
5.0
5.0
5.5
5.5
3
1.5
1.5
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.0
5.5
5.5
6.0
6.0
4
1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
4.5
5.0
5.0
5.5
6.0
6.5
6.5
6
1.5
1.5
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
6.5
7.0
7.0
8
1.5
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.0
7.5
7.5
10
1.5
1.5
2.5
3.0
3.5
4.0
5.0
5.5
6.0
6.5
6.5
7.0
7.5
8.0
8.0
12
1.5
1.5
2.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
7.5
8.0
8.0
14
1.5
2.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
8.5
16
1.5
2.0
3.0
3.5
4.0
5.0
5.5
6.0
6.0
6.5
7.0
7.5
8.0
8.5
8.5
18
1.5
2.0
3.0
3.5
4.0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.0
8.5
9.0
20
1.5
2.0
3.0
3.5
4.0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.0
24
1.5
2.0
3.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.0
30
1.5
2.0
3.0
4.0
4.5
5.0
5.5
6.0
7.0
7.5
8.0
8.5
9.0
9.5
9.5
36
1.5
2.0
3.0
4.0
4.5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
9.5
48 to Flat
1.5
2.0
3.0
4.0
4.5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
9.5
Process Industry Practices
Page 29 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1053
Thickness of Cellular Glass Insulation - Combined Table
ASTM C552
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
50
49
to
25
24
to
0
-1
to
-25
-26
to
-50
-51
to
-75
-76
to
-100
-101
to
-125
-126
to
-150
-151
to
-175
-176
to
-200
-201
to
-225
-226
to
-250
-251
to
-275
-276
to
-290
½
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
3.5
3.5
4.0
4.0
¾
1.5
1.5
1.5
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
4.5
1
1.5
1.5
1.5
2.0
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.0
4.0
4.5
4.5
1-1/2
1.5
1.5
2.0
2.5
2.5
3.0
3.0
3.5
3.5
4.0
4.0
4.5
4.5
5.0
5.0
2
1.5
1.5
2.0
2.5
2.5
3.0
3.5
4.0
4.0
4.5
4.5
5.0
5.0
5.5
5.5
3
1.5
1.5
2.0
2.5
3.0
3.5
3.5
4.0
4.5
5.0
5.0
5.5
5.5
6.0
6.0
4
1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
4.5
5.0
5.0
5.5
6.0
6.5
6.5
6
1.5
1.5
2.5
3.0
3.5
4.0
4.0
4.5
5.0
5.5
6.0
6.5
6.5
7.0
7.0
8
1.5
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.0
7.5
7.5
10
1.5
1.5
2.5
3.0
3.5
4.0
5.0
5.5
6.0
6.5
6.5
7.0
7.5
8.0
8.0
12
1.5
1.5
2.5
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
7.5
8.0
8.0
14
1.5
2.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
8.5
16
1.5
2.0
3.0
3.5
4.0
5.0
5.5
6.0
6.0
6.5
7.0
7.5
8.0
8.5
8.5
18
1.5
2.0
3.0
3.5
4.0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.0
8.5
9.0
20
1.5
2.0
3.0
3.5
4.0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.0
24
1.5
2.0
3.0
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.0
30
1.5
2.0
3.0
4.0
4.5
5.0
5.5
6.0
7.0
7.5
8.0
8.5
9.0
9.5
9.5
36
1.5
2.0
3.0
4.0
4.5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
9.5
48 to Flat
1.5
2.0
3.0
4.0
4.5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
9.5
Page 30 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1054
Thickness of Polyisocyanurate Insulation for CC
ASTM C591
Thickness of Insulation
to Limit Heat Gain to 10 Btu/hr-ft2
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
50
49
to
25
24
to
0
-1
to
-25
-26
to
-40
½
1.0
1.0
1.0
1.0
1.5
¾
1.0
1.0
1.0
1.5
1.5
1
1.0
1.0
1.0
1.5
1.5
1-1/2
1.0
1.0
1.0
1.5
1.5
2
1.0
1.0
1.0
1.5
1.5
3
1.0
1.0
1.0
1.5
1.5
4
1.0
1.0
1.5
1.5
1.5
6
1.5
1.5
1.5
1.5
2.0
8
1.5
1.5
1.5
1.5
2.0
10
1.5
1.5
1.5
1.5
2.0
12
1.5
1.5
1.5
1.5
2.0
14
1.5
1.5
1.5
1.5
2.0
16
1.5
1.5
1.5
1.5
2.0
18
1.5
1.5
1.5
2.0
2.0
20
1.5
1.5
1.5
2.0
2.0
24
1.5
1.5
1.5
2.0
2.0
30
1.5
1.5
1.5
2.0
2.0
36
1.5
1.5
1.5
2.0
2.0
48 to Flat
1.5
1.5
1.5
2.0
2.0
Process Industry Practices
Page 31 of 33
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1055
Thickness of Polyisocyanurate Insulation for CP
ASTM C591
Minimum Insulation Thickness for Horizontal Pipe
to Limit Surface Condensation
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
50
49
to
25
24
to
0
-1
to
-25
-26
to
-40
½
1.0
1.0
1.0
1.0
1.0
¾
1.0
1.0
1.0
1.0
1.0
1
1.0
1.0
1.0
1.0
1.0
1-1/2
1.0
1.0
1.0
1.0
1.0
2
1.0
1.0
1.0
1.0
1.0
3
1.0
1.0
1.0
1.0
1.0
4
1.0
1.0
1.0
1.0
1.0
6
1.5
1.5
1.5
1.5
1.5
8
1.5
1.5
1.5
1.5
1.5
10
1.5
1.5
1.5
1.5
1.5
12
1.5
1.5
1.5
1.5
1.5
14
1.5
1.5
1.5
1.5
1.5
16
1.5
1.5
1.5
1.5
1.5
18
1.5
1.5
1.5
1.5
1.5
20
1.5
1.5
1.5
1.5
1.5
24
1.5
1.5
1.5
1.5
1.5
30
1.5
1.5
1.5
1.5
1.5
36
1.5
1.5
1.5
1.5
1.5
48 to Flat
1.5
1.5
1.5
2.0
2.0
Page 32 of 33
Process Industry Practices
COMPLETE REVISION
PIP INEG1000
Insulation Design and Type Codes
April 1999
INEG1056
Thickness of Polyisocyanurate Insulation - Combined Table
ASTM C591
Nominal
Pipe
Size,
Inches
Operating Temperature, ° F
50
49
to
25
24
to
0
-1
to
-25
-26
to
-40
½
1.0
1.0
1.0
1.0
1.5
¾
1.0
1.0
1.0
1.5
1.5
1
1.0
1.0
1.0
1.5
1.5
1-1/2
1.0
1.0
1.0
1.5
1.5
2
1.0
1.0
1.0
1.5
1.5
3
1.0
1.0
1.0
1.5
1.5
4
1.0
1.0
1.5
1.5
1.5
6
1.5
1.5
1.5
1.5
2.0
8
1.5
1.5
1.5
1.5
2.0
10
1.5
1.5
1.5
1.5
2.0
12
1.5
1.5
1.5
1.5
2.0
14
1.5
1.5
1.5
1.5
2.0
16
1.5
1.5
1.5
1.5
2.0
18
1.5
1.5
1.5
2.0
2.0
20
1.5
1.5
1.5
2.0
2.0
24
1.5
1.5
1.5
2.0
2.0
30
1.5
1.5
1.5
2.0
2.0
36
1.5
1.5
1.5
2.0
2.0
48 to Flat
1.5
1.5
1.5
2.0
2.0
Process Industry Practices
Page 33 of 33