Document qdEmnNZNkMynOybBdpy9bBY2R
MINUTES of the TECHNICAL & RESEARCH COMMITTEE MEETING
NATIONAL INSULATION MANUFACTURERS ASSOCIATION
New York, N.Y
November 7> 1968
MINERAL FIBER SECTION
The meeting was called to order at 9^30 A.M. with the following in at tendance:
W. T. Irwin, Chairman C. E. Ernst V/. Gubar A. Kevlin L. Lach L. Mills J. M. Barnhart
PPG Industries Johns-Manvi lie Certain-Teed/Gustin-Bacon Owens-Corning Johns-Manvilie Certain-Teed/St. Gobain
NE-IA
CS-131
It was agreed that this Commercial Standard was obsolete and should be dropped.
FEDERAL SPECIFICATION KH-I-545
The responsibility of this Specification was relegated to the Duct Systems Committee.
ASTM SPECIFICATION C-6I2
The revised specification, which dropped the alkalinity requirement, was sent to ASTM C-l6 Subcommittee S-I for letter ballot.
FEDERAL SPECIFICATION HH-I-558
The following changes were agreed to:
Par.1.2.1
Delete "Semi-rigid" and "Rigid" - under Form A.
Table X
Form A - dimensions shown in length and width
2- -
Taole I
Change Fora D, Type IV, length to 2 feet.
Table I - "Sizes" - Should be amended in the thickness column for
Form D (pipe insulation) to add the word "nominal' . Note 4 shall
read ''See paragraph 3.5.1.l". Paragraph 3.5.1.1 should be amended
to read
Thicknesses available for various pipe and tube
sizes are nominal# Actual thicknesses will vary in accordance with
manufacturers* standard sizes. Greater thicknesses are available
by combining two or more layers of insulation......... ".
Table III - "Thermal Conductivity11 - (of flexible blankets) - K fac tor data for textile fiber insulation should be changed as follows:
MEAN TEMPERATURE
B-1
B -2
25 .30 .29 50 .32 .31 75 .34 .33 100 .37 .35 200 .53 .50
Par. 3.3.1.1
Change to read: "The blankets shall be either of two types of fibers..."
Par. 3.3.1.2
Change to read: "...and upon release shall spring back to its..."
Par. 4.4.10
Change to read: "...a preload of 2.5 pounds/sq.ft.
for classes 2, 3 and 4, and a preload of 36 pounds/
sq. ft. for class 5."
Table II
Change Class 4 Compressive Load from 700 pounds/ sq.ft, to 75 pounds/sq.ft.
Table IV
Class 7 - Change to "Up to 4-1/2 pcf" and delete column entitled "above 4-1/2 pcf."
Par. 6.2(j)
Change to read: "form C whether metal-cesh covered..."
J. M. Barnhart is to write to GSA incorporating the above changes.
TEMPERATURE LIMITS
Recommendations as to how the upper temperature limits for mineral fiber products are determined was discussed.
It was agreed that each company was to send to the MIMA office, prior to December 1, 1963, for circulation to the Comittcc their individual labora tory test method as well as their criteria for establishing upper tcr.porature limits for their products.
-3-
A standard method of test to evaluate upper temperature limit is to be established.
THERMAL CONDUCTIVITY CURVES W. Gubar is to send to the NIMA office, prior to December 15, 1968, for comments by the Committee suggested. "K" curves, for adoption as NUIA Standard, that are indicative of the various processes used to produce resilient-flexible bl&nliets. It is recommended that manufacturers publish "K1* values that are consistent with current production and that published literature should reflect these values by October, 1$69*
NEXT MEETING It was agreed to hold the next Committee Meeting in conjunction with the Spring ASTM Meeting, in Savannah, Ga.
ADJOURNMENT There being no further business, the meeting was adjourned.
Respectfully submitted,
JM3:rc
J, M. Barnhart
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