Document 7RM51eLYe7pEGxnkmdx2QBye6
FILE NAME Corning OC
DATE 1969 Mar 18 & 25
DOC OC180
DOCUMENT DESCRIPTION Correspondence between United Fire & Casualty Company and Corning
wwe UNITED 32002 Full Multiple Lines of Insurance II >
4930 W. 77th St.
XXXXXXXXXXXCTOOAK XXXXXXXXXXXCTOOAK
MINNEAPOLIS MINNESOTA 55435
CEDAR RAPIDS IOWA
March 18 1969
Corning Fiberglas
717 - 5th Avenue
New York City New York
Corp.
ATTENTION MR JOHN VYRBURG
13/14/19
13/14/19
13/14/19 13/419 ,
Dear Mr. Vyrburg
Your branch office referred me to you
Pipe Insulation
on Wayzata Blvd. in Minneapolis has regarding information concerning Kaylo
We were the Workmens Compensation insurers for insureds
(-_
known as Insul Inc. in Minneapolis They we are informed
used your product known as Kaylo Pipe Insulation which I
understand is magnesia type pipe covering They also used your fiberglas pipe covering Insul Inc. employed a
Fred Herkal from May 1960 until August 1961 when he
terminated his employment He subsequently worked for six different employers In October 1967 Mr. Herkal succumbed
to a lung
widow has
us one of
condition alledgedly caused filed an action against the
the defendants
by asbestosis seven employers
The
making
We would like to insulation and a
know the composition of breakdown by percentage
the magnesia type
of the componets
Any pertinent information concerning the magnesia type and
fiberglas insulation will be appreciated Thank you for your
cooperation
Very truly yours
UNITED FIRE & CASUALTY COMPANY
WQ Hafn
( Minnesota Claims Manager
pt
March 25 1969
Mr. W. J. ilahn
United Fire and Casualty Co.
4930 W. 77th St.
Minneapolis Minn 55435
Dear Mr. Hanni
Your letter of March 18 1969 to John Vyverberg of our New York office has been referred to me for- reply
oe
oe
and
Enclosed are several reports of medical research studies
investigations that were conducted for the purpose of
determining the biological effects of exposure to fibrous
glass particles
Fibrous glass has not demonstrated during the past
.
thirty years that it has properties that cause lung disease
It does not cause asbestosis and to our knowledge no case of
silicosis has resulted from
exposure to borne fibrous glass
This last statement frequently surprises those who
with the physical structure and chemical makeup of gar leasusnfamiliar
Glass is a silicate and does not contain free silica
does cause silicosis Class is amorphous whereas silica and
asbestos are crystalline in structure The crystalline materials
have been shown to be more
pathogenic than the amorphous
substances Most of the fragmented and borne glass particles
from the glass insulations are too If the particles cannot enter the
large
to eater
the
lungs
disease On the
lungs they cannot cause lung
other hand should the glass particles be milled
impinged to form very small particles capable of
or
laboratory animals see Glass Dust A Study of IbtseinBgioliongsipicred by
Effects page 34/22 Summary and Conclusions no serious
> bronchial disease was demonstrated
Ar
Lorre
Cart Ar Lorre
Height
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Glass
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Glass
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)
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aestzMr. W. J. Hahn
-2-
March 25 1969
Therefore exposure to fibrous glass can be dismissed as being a contributing factor in this case
Did Mr. Herkal actually handle or install Kaylo or other asbestos containing products during the period from May 1960 to August 19617 If so how much of his time was spent with these products and was he subjected to high concentrations of dust
Objective symptoms of asbestosis are seldom demonstrable in
than 12 to 15 years of exposure and may require as much as 30 to 35 years
lega
mitriy
Kaylo is alhydrous calcium silicate
15 asbestos The asbestos is contained
caterial and very little of the asbestos
containing approximately
in the calcium silicate fiber will be released
except when the product is saved into desired shapes or stripped
from pipes boilers etc.
A typical composition is quickline tripoli diatomite clay calcium chloride and asbestos These materials are mixed
with water and then indurated in an autoclave at 400 and 250 p.s.i. for three hours
If
If
there
are
additional
questions
please
call
.
or write
Sincerely
FRE 91
F. H. Edwards Director of Health & Hygiene
10