Document 80G6jnmE5j76DxgqwaE5Kyro

Manvllle August 27# 195* E.C. Lindstrcm/HDHQ. Attention* M. Wingerter N.Y. Naval Yard U.S.S. Saratoga Superex Specification for Pipe Covering Yours of 8/25/5* we have reviewed your subject letter with the Control Laboratory and the following are their consents. "Manvllle Factory can meet proposed specification on an S.P.P.I. basis since the Information currently available Is based on a small trial production run made in June 1953 with low magnesia oontent (550. Physical and chemical tests on this product show: 1953 Special Superex Spec. MIL-I-2781-A Density M.R. Index Abrasion Loss* 1200)) 25.9# .80 approx. 3.09 No data available 27# maximum 3 minimum 555* maximum 80< maximum Shrinkage - soaking heat 2* hrs. 1000*? Aver. Linear Volume 4 approx. .46$ maximum 1.4 maximum Magnesia 5M 5$ maximum The Fibre Length Clause Is O.K. Our present fibre blend will meet the requirement of 100 by weight shall be 3/*" or over In length." The requirement of solubility In dilute Hydrochloric of 5 maximum would require very careful control; there would be a tendency to run over. Linear shrinkage at 1000*F will require a special product. We will have no trouble meeting this specification; suggest changing linear from .46$ to .5$.