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ASTM C950/C950M-08(2012)

(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.

General Information

Status
Historical
Publication Date
30-Sep-2012
ICS
83.100 - Cellular materials
Technical Committee
C16 - Thermal Insulation
Drafting Committee
C16.40 - Insulation Systems
Current Stage
Ref Project

Relations

Replaces
ASTM C950/C950M-08 - Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels
Effective Date
01-Oct-2012

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ASTM C950/C950M-08(2012) - Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service VesselsASTM C950/C950M-08(2012) - Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels
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ASTM C950/C950M-08(2012) - Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C950/C950M − 08 (Reapproved 2012)
Standard Practice for
Repair of a Rigid Cellular Polyurethane Insulation System
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.)
2.1 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
...

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4.1 This practice facilitates the selection and application of an insulation system for use at service temperatures between − 30 and + 107°C (−22 and + 225°F). Although the successful installation of spray-applied PUR/PIR is influenced by many factors, this practice treats those four areas found to be of major importance:  
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* = Not available consult manufacturer for additional information.
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NB = A manufacturer can only claim conformance to this standard to the values reported in this table. The * notes are confidential data to the manufacturers and as such are not considered part of any qualifying requirements for the standard and only tell the user to inquire about that data.  
* = Not available consult manufacturer for additional information.
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1.6 When adopted by an authority having jurisdiction, codes that address fire properties in many applications regulate the use of the thermal insulation materials covered by this specification. Fire properties are controlled by job, project, or other specifications where codes or government regulations do not apply.  
1.7 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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This specification covers the types and physical properties of spray applied rigid cellular polyurethane intended for use as thermal insulation. Spray-applied rigid-cellular polyurethane thermal insulation shall be classified into four type: Type I; Type II; Type III; and Type IV. Spray-applied rigid-cellular polyurethane thermal insulation shall be produced by the catalyzed chemical reaction of polyisocyanates with polyhydroxyl compounds and by the catalyzed polymerization of polyisocyanates. The following test methods shall be performed: thermal resistance; compressive strength; water vapor permeability; water absorption; tensile strength; response to thermal and humid aging; closed cell content; and surface burning characteristics.
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This specification covers faced or unfaced rigid cellular phenolic thermal insulation. Insulations in the form of boards shall be faced or unfaced, while tubular forms shall be unfaced. This specification does not apply to field expanded cellular phenolic materials. Materials covered by this specification are used as roof insulation; sheathing or rigid board for non-load bearing, building material applications; and pipe insulation for use at specified temperature ranges. Type II Grade 1 and Type III Grade 1 materials with an appropriate vapor retarder covering on the warm surface can be used to a lower temperature limit. The thermal insulation shall be of the following types and grades: Type I, for use as roof insulation board and produced without integral vapor retarder facers; Type II, for use as sheathing or rigid panel for non-load bearing applications and produced with integral vapor retarder facers; Type III, for use as pipe insulation and produced without integral vapor retarder facers; Grade 1, closed cell material; and Grade 2, open cell material. Materials shall be sampled, prepared, tested, and conform accordingly to the following physical properties: density; compressive resistance; tensile strength; apparent thermal conductivity; dimension stability; water absorption; water vapor permeance and permeability; flame spread index; and smoke developed index.
SCOPE
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5.1.1 Ultimate tensile strength,  
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SCOPE
1.1 This test method covers the determination of the tensile properties of metal matrix composites reinforced by continuous and discontinuous high-modulus fibers. Nontraditional metal matrix composites as stated in 1.1.6 also are covered in this test method. This test method applies to specimens loaded in a uniaxial manner tested in laboratory air at either room temperature or elevated temperatures. The types of metal matrix composites covered are:  
1.1.1 Unidirectional laminates (all fibers aligned in a single direction) containing either continuous or discontinuous reinforcing fibers. Both longitudinal and transverse properties may be obtained.  
1.1.2 0°/90° balanced crossply laminates containing either continuous or discontinuous reinforcing fibers.  
1.1.3 Angleply laminates containing continuous reinforcing fibers, with layups that do not include 0° reinforcing fibers (that is, (±45)ns, (±30)ns, and so forth).  
1.1.4 Multidirectional laminates containing continuous reinforcing fibers, with layups including 0° reinforcing fibers (that is, (0/±45/90)ns quasi-isotropic laminates, (0/±30)ns laminates, and so forth).  
1.1.5 Laminates containing unoriented and random discontinuous fibers.  
1.1.6 Directionally solidified eutectic composites.  
1.2 The technical content of this standard has been stable since 1996 without significant objection from its stakeholders. As there is limited technical support for the maintenance of this standard, changes since that date have been limited to items required to retain consistency with other ASTM D30 Committee standards. The standard therefore should not be considered to include any significant changes in approach and practice since 1996. Future maintenance of the standard will only be in response to specific requests and performed only as technical support allows.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
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  • Standard
    9 pages
    English language
    sale 15% off