Document RaVNKN44ejVGr2rY6DVwkkVY8

MINUTES cf the TECHNICAL. & RESEARCH COMMITTEE MEETING NATIONAL INSULATION MANUFACTURERS ASSOCIATION Chicago, ILL March 9, 1962 The The meeting was called to order at 9:00 A*M, with the following in attend ance: H* F# Hoopes, Chairman L* L* Collogue T. S. Clousing C. E. Ernst V/. Gubar P* L. Losse V. L. Miller E. F. Ctt W* R* Seipt W. P* Sinclair U. W. Smith D* \V, Wingerter R* C. Parlett J* M* Barnhart Fibreboard Paper Products Co, Mundet Cork Ccrp* M, H*- Detrick Company Jchns--Manville Sale3 Corp, Gustia-Bacon Mfg* Company The Eagle-Picher Company'Pittsburgh Coming Corp, Keasbey St Mattiscn Company Keasbey Sc Mattmon Company Union Asbestos Sc Rubber Co, Baldwin-hret-K512, lac, Johns-Manville Sales Corn, NIMA . NIMA BASIS OF CALCULATING HEAT TRANSFER A write up oa this subject, dated 2/14/ 62, circulated to the Committee prior to the meeting was discussed* Several revisions were proposed* The write up with these revisions will be circulated to the Committee for approval and/or comments* DEFINITIONS The list of definitions applicable to thermal insulating materials dated 11/28/61 was discussed* Only minor editorial changes were made* Hois Recommended Practice is attached hereto* ( 2 COMMON BASIS OF PRESENTING ECONOMIC THICKNESS IS was explained that when eramining the table of "B" factors in the Economic Thickness Manual irxsgularitics in the values of "3" can produce an economic thickness tabic that would not rise continually, i. , could drop back at cert ain pipe sines* Mr. Barnhart was asked to talk to Mr. W. C. Turner and try to ascertain as to why this happens. (Mr. Turner said that the primary reason this occurs is due to the sudden increase in costs of insulation for various pipe sizes.) It was decided that smoothing out the values would be justified on the following basis: COMMON BASIS OF PRESENTING ECONOMIC THICKNESS {Based on average conditions) ECONOMIC THICKNESS TABLES (For pipe and flat insulation) 1. Utility or-Power Full year operation {8760 hrs.) 2. Process - Full year operation (8760 hrs.) 3. Commercial - Full year operation (8760 hrs.) 4. Commercial Heating Season (5400 hrs.) Conditions 1. Temperatures 100 F to 1200 F in 100 F increments Note: Average of range 2. Use nominal thicknesses 3. Pipe sizes - as per preference 4. Average design ambient still air - 80F 5. Surface coefficient - as per curve shown in Fig. 5, in write up on "Basis of Calculating Heat Transfer Through yh&vrczl Insulation on Pipe & Flat Surfaces'1 2(T3 h4e5 basic of which has been taken from the ASHRAE "Guide and Data Book") 6, Depreciation period Utility or power Proceo3 Commercial Plant Sc Insulation 20 yxs. 15 yrs. 20 yrs. { 3 7. "F" Factor Utility or power $12, 00 per lb steam per hr -- $9t 530 per million Btu per hr Process $14,00 per lb 3tcazn per hr $11* 110 per million Btu per hr Commercial $16,00 per lb staam per hr $12, 700 per million Btu per hr 8. C" Factor - $1.30 9. Production cost of steam Utility or-power - $0. 60/1C0C lb steam Process - $0, 75/1000 lb steam Commercial $1.00/1000 lb steam 10. "k" Factors - as per individual manufacturer 11.. When using "Df* Tables go to nearest higher breakpoint for temperature and "k". ECONOMIC THICKNESS STUDY {LOW TEMPERATURE) Mr. Barnhart was asked to ascertain whether the cost data needed by Vfest Virginia University has been obtained. (Mr. Y7* C. Turner has indicated the cost data received is adequate, however any further cost data re ceived from manufacturers, contractors, etc., would be helpful). Mr. Barnhart was asked to arrange a meeting of the special coordinating committees cq this subject. O, D*S OF THERMAL INSULATION FOR TUBES The Molded Section reported that their section could not come to an agree ment on insulation outside diameters for tubes. Mr. Barnhart was asked to circulate to the Committee the ASTM Table for IPS dated January 32, 1962, requesting approval and/or comments as to the acceptance of the Table for O. D. *s for tubes. The comments are to be returned to the NIMA office within 30 days. A summary of the result s will be circulated to the Committee prior to the next T Sc R Committee Meeting. OTHER BUSINSSS w Two requests had been received asking for recommendations for supports for cold and refrigerated piping. Mr. Barnhart was asked to write to the individuals informing them that basically the problem was not NI?lAfs responsibility for such design, and to advise thorn as to what factors should be taken into account when designing the suppevbports. 4 (b) Discussion on smoke and fire resistance of insulations and finishes was deferred for the present. The Committee does not feel it should duplicate the work that is being done by ASTM on this subject. (c) Mr. W, R. Seipt brought to the attention of the Committee an article entitled "Stainless Failures by Stress Corrosion" featured in Hydrocarbon Processing and Petroleum Refiner, V41, No. i (Jan. *62). The article referred to magnesia insulation as a stress corroding material. Mr. Barnhart was asked to write to the Editor of the magazine informing him that his data was wrong and inform ing him that we would review articles pertaining to insulating materials prior to publication, if he so desires. (d) Mr. Barnhart informed the Committee that BRAB is planning to publish technical data relating to thermal insulations. The Committee agreed that NIMA and the manufacturers could furnish data to BRAB and the government agencies only those values which were obtained by ASTM test methods. Mr* Barnhart was requested to ask the NIMA Board of Directors as to the policy desired when other consumers request data not sub stantiated by ASTM test methods. (e) The subject of QPL was discussed, especially the time and money involved by the manufacturers having teats made for qualification, It was requested that NIMA discuss this subject at the next Govern ment T & R Committee Meeting, (i. e. where do manufacturers go to get reliable tests, can come of the tests be eliminated, etc.) ADJOURNMENT There being no further business, the meeting was adjourned. Respectfully submitted M. Barnhart