ASTM C950/C950M-08
(Practice)Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels
Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels
ABSTRACT
This practice covers the repair of rigid cellular polyurethane insulation systems on outdoor service vessels operating within a specified temperature range. Before any repairs are performed, all damaged nonadhering foam should be removed up to the dry, solidly adhering layer and the remaining foam insulation should then be beveled on all sides. If the existing substrate primer is damaged, it should be wire-brushed and reprimed where feasible. To protect the surrounding undamaged area, a covering should be installed around the area that needs to be repaired prior to the application of spray foam. Repairs shall be made in accordance with the prescribed procedure.
SCOPE
1.1 This practice covers the repair of spray-applied polyurethane insulation on vessels normally operating at temperatures between − 30 and + 107°C [−22 and + 225°F].
1.2 Warning—At temperatures below 0°C [32°F] the application of a spray “foam” directly onto the cold substrate may not be possible. The term “foam” applies to spray-applied polyurethane or polyisocyanurate (PUR or PIR) rigid cellular plastic only, and not to any other plastic insulation.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.4 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific precautionary statement see 1.2.
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Designation: C950/C950M − 08
StandardPractice for
Repair of a Rigid Cellular Polyurethane Insulation System
1
on Outdoor Service Vessels
This standard is issued under the fixed designation C950/C950M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Surface Preparation
1.1 Thispracticecoverstherepairofspray-appliedpolyure-
4.1 All damaged or nonadhering foam shall be removed to
thane insulation on vessels normally operating at temperatures
the substrate in all directions, until dry, solidly adhering foam
between − 30 and + 107°C [−22 and + 225°F].
is encountered.
1.2 Warning—At temperatures below 0°C [32°F] the ap-
4.2 The remaining foam insulation shall be beveled on all
plicationofaspray“foam”directlyontothecoldsubstratemay
sides to approximately a 45° angle.
not be possible. The term “foam” applies to spray-applied
4.3 The substrate shall be examined and if the existing
polyurethane or polyisocyanurate (PUR or PIR) rigid cellular
primer is damaged, it shall be wire-brushed and reprimed,
plastic only, and not to any other plastic insulation.
where feasible, in accordance with the primer manufacturer’s
1.3 The values stated in either SI units or inch-pound units
instructions.
are to be regarded separately as standard. The values stated in
4.4 A covering shall be installed around the area to be
each system may not be exact equivalents; therefore, each
repaired, prior to spray foam application, to protect the
system shall be used independently of the other. Combining
surrounding undamaged area from overspray and removed
values from the two systems may result in non-conformance
after completion of the repair work.
with the standard.
1.4 This standard may involve hazardous materials,
5. Repair Procedure
operations, and equipment. This standard does not purport to
address all of the safety concerns associated with its use. It is
5.1 Therepairshallbeaccomplishedinoneofthefollowing
the responsibility of the user of this standard to establish
manners:
appropriate safety and health practices and determine the
5.1.1 Foam shall be spray applied to the prepared area and
applicability of regulatory limitations prior to use. For a
top-coated with the specified protective coating. (An open-
specific precautionary statement see 1.2.
weave reinforcing fabric may be embedded into the wet first
coat if desired. Caution shall be taken to embed the reinforcing
2. Referenced Documents
fabric totally within the coating.)
2
2.1 ASTM Standards:
5.1.2 For substrate temperatures below 0°C [32°F], the
C168 Terminology Relating to Thermal Insulation
following procedure shall be used: Cut to shape and install a
C945 Practice for Design Considerations and Spray Appli-
thin layer of rigid PUR/PIR board (to insulate the surface) in
cation of a Rigid Cellular Polyurethane Insulation System
the prepared area with a joint sealer. Apply spray foam in
on Outdoor Service Vessels
accordance with 5.1.1.
3. Terminology
5.2 All horizontal areas shall be repaired in a manner to
3.1 General—Definitions included in Terminology C168
provide drainage and prevent free-standing water.
shall apply to the
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C950 –05 Designation:C950/C950M–08
Standard Practice for
Repair of a Rigid Cellular Polyurethane Insulation System
1
on Outdoor Service Vessels
This standard is issued under the fixed designation C 950/C950M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1This practice covers the repair of spray-applied polyurethane insulation on vessels normally operating at temperatures
between−30 and+107°C (−22 and+225°F).
1.2Caution—At temperatures below 0°C (32°F) the application of a spray “foam” directly onto the cold substrate may not be
possible.The term “foam” applies to spray-applied polyurethane or polyisocyanurate (PUR or PIR) rigid cellular plastic only, and
not to any other plastic insulation.
1.3
1.1 This practice covers the repair of spray-applied polyurethane insulation on vessels normally operating at temperatures
between − 30 and + 107°C [−22 and + 225°F].
1.2 Warning—At temperatures below 0°C [32°F] the application of a spray “foam” directly onto the cold substrate may not
be possible. The term “foam” applies to spray-applied polyurethane or polyisocyanurate (PUR or PIR) rigid cellular plastic only,
and not to any other plastic insulation.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.4 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all
of the safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory limitations prior to use. For a specific precautionary statement see
1.2.
2. Referenced Documents
2
2.1 ASTM Standards:
C 168 Terminology Relating to Thermal Insulation
C 945 PracticeforDesignConsiderationsandSprayApplicationofaRigidCellularPolyurethaneInsulationSystemonOutdoor
Service Vessels
3. Terminology
3.1 General—Definitions included in Terminology C 168 shall apply to the terms used in this practice.
4. Surface Preparation
4.1 All damaged or nonadhering foam shall be removed to the substrate in all directions, until dry, solidly adhering foam is
encountered.
4.2 The remaining foam insulation shall be beveled on all sides to approximately a 45° angle.
4.3 Thesubstrateshallbeexaminedandiftheexistingprimerisdamaged,itshallbewire-brushedandreprimed,wherefeasible,
in accordance with the primer manufacturer’s instructions.
4.4 A covering shall be installed around the area to be repaired, prior to spray foam application, to protect the surrounding
undamaged area from overspray and removed after completion of the repair work.
1
This practice is under the jurisdiction ofASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.40 on Insulation Systems.
Current edition approved Sept. 1, 2005. Published October 2005. Originally approved in 1981. last previous edition approved in 2000 as C950–81 (2000).
Current edition approved Dec. 1, 2008. Published December 2008. Originally approved in 1981. last previous edition approved in 2005 as C 950–05.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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C950/C950M–08
5. Repair Procedure
5.1 The repair shall be accomplished in one of the following manners:
5.1.1 Foam shall be spray applied to the prepared area and top-coated with the specified protective coating. (An open-weave
reinforcing fabric may be embedded into the wet first coat if desired. Caution shall be taken to embed the reinforcing fabric totally
within the coating.)
5.1.2 Forsubstratetemperaturesbelow0°C(32°F),[32°F],thefollowingprocedureshallbeused:Cuttoshapeandinstallathin
layerofrigidPUR/PIRboard(toinsulatethesurface)inthepreparedareawithajointsealer
...
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