Document 373beDv5QkXERZ797Ypv5Ga7a

KLINGER RICHARD KLINQER INC. 2350 CAMPBELL RD. SIDNEY, OHIO 45365 PHONE (513) 408-1151 TELEX 288317 January 30, 1984 Letter No. P-1809 Utex Industries Inc. P.O. Box 79227 Houston, TX 77079 Att: Mr. W.A. Weiso Dear Mr. Weison: Mr. Byron Gardner of Sun Exploration and Production called us on Thursday, January 26 1984 ^questioning the maximum pressure we have listed in our brochureTHe is using our K62 - your Style 1101 sheet packing in 100F salt water at 500-700 psi pressure. We list a maximum pressure of 400 psi. At this point the yeild (Y) and maintenance factor were explained to him. This letter -and the enclosed copy of ;"Klinger Takes the Guesswork Out of .Gaskets" is meant to. explain fully how we arrive at the minimum assembly stress (M ) for a gasket to seal. . . . . ... . .\ w -A. i.- Because the assembler knows the application in which the gasket is being used, we prefer to provide him with the numbers so he can calculate the minimum sealing stress. The assembler calculates the minimum assembly stress (M ) for a gasket to seal by: a + 2^ Pj M_as = Y + MP. where Y is the yeild factor or minimum pressure for a gasket to seal at any pressure; M is the maintenance factor or the factor to keep a seal at higher pressures. P. is the pressure of the gas or liquid inside of the pipe or 1 vessel. A is the area of the gasket that actually is being compressed.g A is the cross sectional area of the' f larige'^joint or vessel. On the right hand side of the equation, the first two terms are self explanatory, but the last term should be explained. 2 A P^ is the force that the medium is applying to force the " flange apart due to hydrostatic end thrust. If you then divide by the area of gasket, then you are compensating for the unloading effect due to pressure of the medium. The assembler can then calculate the bolt load to seal the joint: Force/Bolt = (M A )/(Number of bolts in the joint) a5 y TG/ded UTEX 001135 KLINGER RICHARD KLINGER INC. 2350 CAMPBELL RO. SIDNEY, OHIO 45365 PHONE (513) 496-1181 TELEX 268317 Page 2 Mr. W.A. Weison January 30, 1984 Now the assembler can look up the size and torque required for the joint to seal. To satisfy your requirement, the yeild, maintenance and maximum assembly stress values for K62 are: Liquid Test Medium Gases Test Medium Y 50 kp/cm 2 Water 710 (psi) 250 Kp/cm2 3550 (psi) Nitrogen M 2.5 Water 4.0 Nitrogen MAXIMUM ASSEMBLY STRESS Temperature Maximum Stress (psi) F 1/32 1/16 1/8 RT 17000 11600 8700 150 16000 11400 8500 250 11000 9300 7800 300 9900 9000 7500 400 9800 7800 7000 550 8100 6700 5900 If you have any additional questions, please don't hesitate to call me. Kind regards, TG/ded cc: Byron Gardner Russ Johnson William Britton Derek Coomber File Enclosure . -r- - ' ' Tom Grossman Lab. Manager RICHARD KLINGER INC. UTEX 001136