HH-I-1751/4
August 6, 197.3
.
FEDE8AL SPECIFICATIW
INSULATIONSLEEVING, THERMAL,
PIPE COVERING (URSTHPNE)
This specificationwas approved by the Conmnissioner,Federal Supply
Service, General Services Administration,for the use of all Federal
agencies.
1. SCOPE AND CLASSIFICATION
‘“’ =%
This specificationcovers tk requirementsfor rigid cellular urethane
thermal insu atlon fabricatedor preformed into standard shapes for pipe and tubing operating
within a twerature range of minus 10D”F. to plus 220”F.
1.2 Classification.
●
1.2.1 Types and qrades. Expanded u~”thane thermal insulation sleeving shall be of the
follmeing types, and grades, as specified (see 6.2).
Type 1
- Density less than 1.7 pounds per cu. ft. (PcF).
Type 11 -1.7 to 2.49 pounds per cu. ft. density (PcF).
Type 111 - 2.5 to 4.0 pounds per cu. ft. density (PcF).
Grade 1 - Flame spread 75.
Grade 2 - F1ame spread 25.
1.2.2 Standard sizes and dimensions.
1.2.2.1 Unless other wise specified (see 6.2) cellular urethane thermal pipe insulation
shall b+ furnished in lengths of at least 36 inches, thicknesses up to 4 inches, and inside
diamters to fit iron pipe and copper tubing sizes.
It shall be supplied as cylindrical
shapes slit in half length wise or as curved segmnts “asspecified (see 6:2). Forms for
SizeS larger than 8 inches may be in sections.
/0
1.2.2.2 Oinwnsional tolerances.
Dimensionaltolerances of pipe and tubing insulation
segments shall
1n accordance wl
th ASTM C 585.
1.3 The complete requirementsfor procuring thermal insulationsleeving described herein
shall consist of this docunmnt and the latest issue of specificationHH-I-1751/GENand
docu!mnts referenced th?rein.
2. APPLICABLE 00CUHENTS
2.1 The latest issue of Federal SpecificationHH-I-17Sl/GENand docunents referenced
therein.
2.2 Other publications. The following documents form a part of this specification to
the extent specified herein.
Unless a specific issue is identified, the issue in effect on
dam of invitation for bids or request for proposal shall apply.
American Society for Testing and Materials (ASTM) Standards:
C 203 - 8reaking Load and Calculated Flexural Strength of Prefo!md 810ck-Type
Thermal Insulation.
C S91 - Specification for Rigid Prefonred“CellularUrethane Thermal Insulation.
C 585 - Inner and Outer Diam2ters of Rigid Thetml Insulation for Nominal Sizes of
Pipe and Tubing (NPS System).
D 1621 - Test for Compressive Strength of Rigid Cellular Plastics.
D 1692 - Test for Flammability Plastics Sheeting.and Cellular Pla5tiCS.
D 2126 - Test for Resistance of Rigid Cellular Plastics to Simulated Service Conditions.
O 2842 - Test for Mater Absorption of Rigid Cellular Plastics.
E 171 - Specification for Standard Atmosphere for Conditloning and Testing Materials.
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