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ASTM C950-81(1993)

(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

SCOPE
1.1 This practice covers the repair of spray-applied polyurethane insulation on vessels normally operating at temperatures between -30 and + 107oC (-22 and + 225oF).
1.2 Caution-At temperatures below 0oC (32oF) 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 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 specific precautionary statements see 1.2 and 5.1.2.

General Information

Status
Historical
Publication Date
31-Dec-1999
Technical Committee
C16 - Thermal Insulation
Drafting Committee
C16.40 - Insulation Systems
Current Stage
Ref Project

Relations

Replaced By
ASTM C950-81(2000) - Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels
Effective Date
01-Jan-2000

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ASTM C950-81(1993) - Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service VesselsASTM C950-81(1993) - Standard Practice for Repair of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels
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ASTM C950-81(1993) - 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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 950 – 81 (Reapproved 1993)
Standard Practice for
Repair of a Rigid Cellular Polyurethane Insulation System
on Outdoor Service Vessels
This standard is issued under the fixed designation C 950; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.4 A covering should be installed around the area to be
repaired, prior to spray foam application, to protect the
1.1 This practice covers the repair of spray-applied polyure-
surrounding undamaged area from overspray and removed
thane insulation on vessels normally operating at temperatures
after completion of the repair work.
between − 30 and + 107°C (−22 and + 225°F).
1.2 Caution—At temperatures below 0°C (32°F) the appli-
5. Repair Procedure
cation of a spray “foam” directly onto the cold substrate may
5.1 The repair shall be accomplished in one of the following
not be possible. The term “foam” applies to spray-applied
manners:
polyurethane or polyisocyanurate (PUR or PIR) rigid cellular
5.1.1 Foam shall be spray applied to the prepared area and
plastic only, and not to any other plastic insulation.
top-coated with the specified protective coating. (An open-
1.3 This standard may involve hazardous materials, opera-
weave reinforcing fabric may be embedded into the wet first
tions, and equipment. This standard does not purport to
coat if desired. Caution should be taken to embed the reinforc-
address all of the safety concerns associated with its use. It is
ing fabric totally within the coating.)
the responsibility of the user of this standard to establish
5.1.2 Rigid urethane board, cut to shape, shall be installed in
appropriate safety and health practices and determine the
the prepared area with a joint sealer applied to the surface that
applicability of regulatory limitations prior to use. For specific
will come in contact with the existing spray foam. Install the
precautionary statements see 1.2 and 5.1.2.
specified protective coating over the repaired area. (An open-
2. Referenced Documents weave reinforcing fabric may be embedded into the wet first
coat if desired. Caution should be taken to embed the reinforc-
2.1 ASTM Standards:
ing fabric totally within the coating.)
C 168 Terminology Relating to Thermal Insulating Materi-
5.1.3 For substrate temperatures below 0°C (32°F), the
als
following procedure is recommended: Cut to shape and install
C 945 Practice for Design Considerations and Spray Appli-
a 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
provide drainage and prevent free-standing water.
3.1 General—Definitions included in Terminology C 168
5.3 Spraying should not be done in the presence of water
shall apply to the terms used in this practice.
(rain, fog, condensation, etc.) or wind veloc
...

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This specification covers grades of fuel oil intended for use in various types of fuel-oil-burning equipment under various climatic and operating conditions. These grades include the following: Grades No. 1 S5000, No. 1 S500, No. 2 S5000, and No. 2 S500 for use in domestic and small industrial burners; Grades No. 1 S5000 and No. 1 S500 adapted to vaporizing type burners or where storage conditions require low pour point fuel; Grades No. 4 (Light) and No. 4 (Heavy) for use in commercial/industrial burners; and Grades No. 5 (Light), No. 5 (Heavy), and No. 6 for use in industrial burners. Preheating is usually required for handling and proper atomization. The grades of fuel oil shall be homogeneous hydrocarbon oils, free from inorganic acid, and free from excessive amounts of solid or fibrous foreign matter. Grades containing residual components shall remain uniform in normal storage and not separate by gravity into light and heavy oil components outside the viscosity limits for the grade. The grades of fuel oil shall conform to the limiting requirements prescribed for: (1) flash point, (2) water and sediment, (3) physical distillation or simulated distillation, (4) kinematic viscosity, (5) Ramsbottom carbon residue, (6) ash, (7) sulfur, (8) copper strip corrosion, (9) density, and (10) pour point. The test methods for determining conformance to the specified properties are given.
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1.1 This specification (see Note 1) covers grades of fuel oil intended for use in various types of fuel-oil-burning equipment under various climatic and operating conditions. These grades are described as follows:  
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This specification covers SEBS (styrene-ethylenebutylene-styrene)-modified mopping asphalt intended for use in built-up roof construction, construction of some modified bitumen systems, construction of bituminous vapor retarder systems, and for adhering insulation boards used in various types of roofing systems. This specification is intended as a material specification and issues regarding the suitability of specific roof constructions or application techniques are beyond its scope. The specified tests and property values are intended to establish minimum properties. In place system design criteria or performance attributes are factors beyond the scope of this specification. The base asphalt shall be prepared from crude petroleum and the SEBS-modified asphalt shall incorporate sufficient SEBS as the primary polymeric modifier. The SEBS modified asphalt shall be homogeneous and free of water and shall conform to the prescribed physical properties including (1) softening point before and after heat exposure, (2) softening point change, (3) flash point, (4) penetration before and after heat exposure, (5) penetration change, (6) solubility in trichloroethylene, (7) tensile elongation, (8) elastic recovery, and (9) low temperature flexibility. The sampling and test methods to determine compliance with the specified physical properties, as well as the evaluation for stability during heat exposure are detailed.
SCOPE
1.1 This specification covers SEBS (styrene-ethylene-butylene-styrene)-modified asphalt intended for use in built-up roof construction, construction of some modified bitumen systems, construction of bituminous vapor retarder systems, and for adhering insulation boards used in various types of roof systems.  
1.2 This specification is intended as a material specification. Issues regarding the suitability of specific roof constructions or application techniques are beyond its scope.  
1.3 The specified tests and property values used to characterize SEBS-modified asphalt are intended to establish minimum properties. In-place system design criteria or performance attributes are factors beyond the scope of this specification.  
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5.1 This test method measures a lubricant's ability to protect hypoid final drive axles from abrasive wear, adhesive wear, plastic deformation, and surface fatigue when subjected to low-speed, high-torque conditions. Lack of protection can lead to premature gear or bearing failure, or both.  
5.2 This test method is used, or referred to, in specifications and classifications of rear-axle gear lubricants such as:  
5.2.1 Specification D7450.  
5.2.2 American Petroleum Institute (API) Publication 1560.  
5.2.3 SAE J308.  
5.2.4 SAE J2360.
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SCOPE
1.1 This specification covers lap cement consisting of asphalt dissolved in a volatile petroleum solvent with or without mineral or other stabilizers, or both, for use with roll roofing. The fibered version of these cements excludes the use of asbestos fibers.  
1.2 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 nonconformance with the standard.  
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