Document jdm3be5gEKoV7VjNnVp4wqrN

TECHNICAL* & RESEARCH COMMITTEE MEETING NATIONAL INSULATION MANUFACTURERS ASSOCIATION Chicago, &1 March 9, 19&Z The meeting was called to order at 9:00 A, M. with the following in attend'* ance: H, p. Hoopss, Chairman L. L. Collogne T. S. Ciouaing C. . Ernst W. Gubar P. L. Losse V. L. Miller E. F. Ott W. R. Seipt W. P. Sinclair V. W. smith D. W, Wingerter R C. Pariett J. M. Barnhart Fibreboard Paper Products Co. Mundet Cork Corp. M Hr Detrick Company Johas-MaaviUe Sales Corp. Gustin-Bacon Mfg. Company The Eagle-Picber Company Pittsburgh Corning Corp. Keasbey & Mattisoa Company Keasbey le Mattieon Company Union Asbestos & Rubber Co. Baldwin-Ehset-Hill, Inc. Jobns-M&nviUe Sales Corp. NIMA NXMA BASIS OF CALCULATING HEAT TRANSFER A 'write up on this -subject, date* Zl I4/-62, .circulated to the Committee prior to the meeting was diecussed. 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 H/2$/6i was discussed. Only minor editorial changes were made. This Recommended Practice is attached hereto. nr 422X67 . ft 0085 WV-059Q5 2 COMMON BASIS OF PRESENTING ECONOMIC THICKNESS It was explained that when examining the table of "B" factors in the Economic Thickness Manual irregularities In the values of "BM can produce an economic thickness table that would not rise continually, i. e, could drop back at cert ain pipe sizes, Mr, Barnhart was asked to talk to Mr, W. C, Tamer 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 sizea,) It was decided that smoothing out the values would be justified on the following basis: COMMON BASIS OF PRESENTING ECONOMIC TH1CKXBSS (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 ($760 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 thicknesse& 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 Thermal Insulation on Pipe Sr Flat Surfaces" (The basic of which has been taken from the ASHRAE "Guide and Data Book") 6, Depreciation period Utility or power Process Commercial plant & Insulation 20 yrs. 25 yrs. 20 yrs. MC 422167 Q O0S6 (b) Discussion on smoke and fire resistance of insulations and finishes was deferred for the present. The Committee does cot feel it should duplicate the work that is being done by A5TM 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. 1 .1 {Jan. '62J, The article referred to magnesia insulation as a stress v1^' 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 MIMA 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 HXMA Board of Directors as to the policy desired when other consumers request data not sub stantiated by ASTM test methods, {*} The subject of QPL was discussed, especially the time and money involved by the manufacturers having teats made for qualification, . It was requested that N2MA discuss this subject at the next Govern ment T &< R Committee Meeting, (i,e. where do manufacturers go to get reliable testa, can some of the tests be eliminated, etc,) ADJOURNMENT There being no further business, the meeting was adjourned. Respectfully submitted tIC 4223 67 fi 0088 r , > t i..a 3 7, ,,Fn Factor Utility of power - $12,00 per lb steam per hr $9,530 per million Btu per hr Proceed - $H.OO per lb steam per hr $11, i 10 per million Btu per hr Commercial $16,00 per lb steam per hr $12, 700 per million Btu per hr S. "C*> Factor- $2.30 9# Production cost of steam Utility or-power - $0,60/1000 lb steam Process - $0,76/1000 lb steam Commercial - $1,00/1000 lb steam 10, "k!t Factors - as per individual manufacturer 11. When using MD!f Tables go to nearest higher breakpoint for temperature and ECONOMIC THICKNESS STUPY (LOW TEMPERATURE! Mr, Barnhart was asked to ascertain whether die cost data needed by West Virginia University has been obtained, {Mr W C, Torse* has indicated that the cost data received Is adequate, however any further cost data re ceived from maaufaetutots, contractors, etc,, would be helpful), Mr, Barnhart was asked to arrange a meeting of the special coordinating committees on this subject, Q,t>*S OF THERMAL INSULATION FOR TUBES The Molded Section reported that their section could not come to an agree ment on insulation oatside"diameters -Mx, .Barnhart was asked to circulate to the Committee die A5TM Table for IPS dated January 32, 1962, requesting approval and/or comments as to the acceptance of the Table for O. D. `e for tubes. The comments are to be returned to the NJMA office within 30 days, A summary of the result s will be circulated to the Committee prior to the next T & R Committee Meeting, OTHER BUSINESS faj Two requests had been received asking for recommendations fo* supports for cold and refrigerated piping, Mr, Barnhart was asked to write to the individuals informing them that basically the problem was not N2MA1* responsibility for such design, and to advise them as to what factors should be taken into account when designing the supports. MC 422167, P oo&: 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* (e) Mr. W. Selpt brought to the attention of the Committee an article entitled "Stainless Failures by Stress Corrosion" featured in Hydrocarbon Processing and Petroleum Refinery V41, No, 1 * ' {Jan* The article referred to magnesia insulation as a stress .'fY 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 BRA.3 ie 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 test* 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 testa, cai* some of the tests be eliminated, etc*) ADJOURNMENT There being no further business, the meeting was adjourned. Respectfully submitted MC 422167 fi) 0088 C-!\ 3/9/62 NIMA . RECOMMENDED PRACTICE DEFINITIONS APPLICABLE TO THERMAL INSULATING MATERIALS COMPOSITIONS 1. Mineral Fibers - A generic term for all noa-metallic inorganic fibers. These fibers may be natural, such as asbestos, or may be manu factured, such as rock, slag or glass. 2. &5% Magnesia thermal insulation is composed principally of basic magnesium carbonate with reinforcing mineral fiber. 3. Dlatomaceous Silica thermal insulation is composed principally of diamtoaceous earth with or without heat-resistant inorganic binder(s) and reinforcing mineral fiber. 4. Calcium Silicate thermal insulation is composed principally of hydrous calcium silicate with reinforcing mineral fiber. 5. Cellular Glass thermal insulation is composed of glass processed by fusion, to form a homogeneous rigid mass of hermetically sealed cells. 6. Amosite Asbestos thermal insulation is composed principally of amosiie asbestos fiber with or without heat resistant inorganic binder and filler. 7. Mineral Fiber thermal insulation is composed principally of fibers manufactured from mineral substances such as rock, slag or glass with or without binder. 8. Cellular Plastic thermal insulation is composed of organic materials processed to form a homogeneous mass of cells. FORMS 1. Pipe insulation is thermal insulation suited for application to cylindrical surfaces of pipe and tubing. <a) Molded-type Pipe Insulation is thermal insulation preformed in cylindrical, semi-cylindrical or segmented sections to fit pipe and tubing. MC 422X67 /? 0099 n 01 2- (b) Blanket-type Pipe Insulation is flexible thermal insulation furnished flat in sizes to fit around pipe and tubing* 2* Block or Board Insulation is rigid thermal insulation preformed in rectangular units to fit flat surfaces or curved surfaces of diameters above S3 inches. 3* Insulating Cement is composed of a dry mixture of fibrous* powdery or granular materials which when mixed with water, applied as a plastic mass and dried in place* forms a monolithic thermal insulation. 4. Finishing Cement is composed of a dry mixture of fibrous, powdery or granular materials, which when mixed with water and applied" as a plastic mass to thermal insulation* dries to a smooth, hard, protective surface, 5. Insulating-Finishing Cement is a dry mixture of fibrous, powdery or granular materials which when mixed with water, applied as a plastic mass, dries to form a monolithic thermal insulation with a smooth, firm surface, 4, Loose Fill Insulation is thermal insulation composed of a dry mixture of fibrous, powdery, or granular materials for installation between confining surfaces or as a top layer, ?. Blanket Insulation is flexible thermal insulation that can readily be conformed to curved surfaces, and which is suitably bound together to provide units of substantial area for handling and application and which may be faced or reinforced with confining media, 8, Felt Insulation is semi-rigid or flexible thermal insulation normally furnished in flat sheets composed of mineral fibers with or without binder. MC 42216?" Q 0090