ASME Combination Capacity Factors
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ASME COMBINATION CAPACITY FACTORS FOR CONDUCTING FLOW TESTS OF RUPTURE DISCS, PRESSURE RELIEF VALVES AND COMBINATIONS THEREOF The following Continental Disc Corporation rupture disc and pressure relief valve combination capacity factors were determined by testing the rupture disc device mounted directly beneath the valve inlet in accordance with ASME Pressure Vessel Code, Section VIII, Division I, and certified by The National Board of Boiler and Pressure Vessel Inspectors. The information provided is to be used as a multiplier to make appropriate changes in the ASME rated relieving capacity of the pressure relief valve. It is applicable only to the combination of pressure relief valve and rupture disc designs tested. ASME allows the use of a 0.9 multiplier for those combinations not tested. Capacity factors are not applied to rupture discs installed at the outlet of a pressure relief valve. Continental Disc Corporation maintains an ASME accepted flow lab for conducting flow tests of rupture discs, pressure relief valves, and rupture disc / pressure relief valve combinations. HOW TO USE THE COMBINATION CAPACITY FACTOR To determine the combination capacity of the listed rupture disc/pressure relief valve combinations, the ASME rated capacity of the pressure relief valve is multiplied by the capacity factor for the combination. The factors listed may be used for sizes equal to or larger and pressures equal to or greater than the rupture disc/pressure relief valve combinations tested (except where limited range is indicated). EXAMPLE: 6” Crosby Model JOS-156R8 pressure relief valve with a set pressure of 80 psig and a published relieving capacity of 29248 SCFM air. Assume that a rupture disc is required to isolate the inlet side of the valve and a Continental ULTRX® Rupture Disc of HASTELLOY® material has been selected. To determine the calculated capacity of the rupture disc/pressure relief valve combination: 1. Refer to the ULTRX Rupture Discs tested. 2. Select the largest size less than or equal to the 6” size. Use the 3” size for this example. 3. Select the desired rupture disc material and pressure range from the chart. For this example, use HASTELLOY® for 60 psig plus. 4. From the chart, find the factor in column “Crosby JOS/JBS.” The ASME rated relieving capacity of the Crosby type JOS valve and ULTRX Rupture Disc combination is: 29248 x 0.987 = 28868 SCFM PERFO RMANC E

RUPTURE DISC/RELIEF VALVE COMBINATION CAPACITY FACTORS Rupture Disc Pressure Relief Valve Model Teledyne Dresser Kunkle Set Farris 1900 Crosby Crosby Crosby 5000 Lonergan Type Size Material Pressure 2600 & 1900-30 JOS/JBS JB JO thru D & DB psig 4500 1900-35 5999 ULTRX® Rupture Disc with ULTRX® holder MINTRX® Rupture Disc with MINTRX® holder Nickel/Fluoropolymer Liner Rupture Disc with STAR X® holder Nickel/Fluoropolymer Liner Nickel/Fluoropolymer Liner Nickel/Fluoropolymer Liner Nickel/Fluoropolymer Liner

RUPTURE DISC/RELIEF VALVE COMBINATION CAPACITY FACTORS Rupture Disc Pressure Relief Valve Model Teledyne Dresser Kunkle Set Farris 1900 Crosby Crosby Crosby 5000 Lonergan Type Size Material Pressure 2600 & 1900-30 JOS/JBS JB JO thru D & DB psig 4500 1900-35 5999 ZAP Disc with ZAP Holder INCONEL /Fluoropolymer MONEL®/Fluoropolymer Liner Nickel/Fluoropolymer Liner INCONEL®/Fluoropolymer Liner

RUPTURE DISC/RELIEF VALVE COMBINATION CAPACITY FACTORS Rupture Disc Pressure Relief Valve Model Teledyne Dresser Kunkle Set Farris 1900 Crosby Crosby Crosby 5000 Lonergan Type Size Material Pressure 2600 & 1900-30 JOS/JBS JB JO thru D & DB psig 4500 1900-35 5999 ZAP 3.0 MONEL /Fluoropolymer Liner Nickel/Fluoropolymer Liner Nickel/Fluoropolymer Liner Rupture Disc with ZAP Holder continued KBA Rupture Disc 1.0 MONEL® 60 PLUS — — with KBA Holder

RUPTURE DISC/RELIEF VALVE COMBINATION CAPACITY FACTORS Rupture Disc Pressure Relief Valve Model Teledyne Dresser Kunkle Set Farris 1900 Crosby Crosby Crosby 5000 Lonergan Type Size Material Pressure 2600 & 1900-30 JOS/JBS JB JO thru D & DB psig 4500 1900-35 5999 CDC Light Lip Rupture Disc with 30° Seat Light Lip Holder

RUPTURE DISC/RELIEF VALVE COMBINATION CAPACITY FACTORS Rupture Disc Pressure Relief Valve Model Teledyne Dresser Kunkle Set Farris 1900 Crosby Crosby Crosby 5000 Lonergan Type Size Material Pressure 2600 & 1900-30 JOS/JBS JB JO thru D & DB psig 4500 1900-35 5999 CDCV Light Lip Rupture Disc with 30° Seat Light Lip Holder 1.0 HASTELLOY /Fluoropolymer/HASTELLOY PLUS — — 0.960 — — — — 60 ® 1.5 HASTELLOY / Fluoropolymer/HASTELLOY PLUS — — 0.960 — — — — 60 3.0 HASTELLOY /Fluoropolymer/HASTELLOY PLUS — — 0.960 — — — — 60

RUPTURE DISC/RELIEF VALVE COMBINATION CAPACITY FACTORS Rupture Disc Pressure Relief Valve Model Teledyne Dresser Kunkle Set Farris 1900 Crosby Crosby Crosby 5000 Lonergan Type Size Material Pressure 2600 & 1900-30 JOS/JBS JB JO thru D & DB psig 4500 1900-35 5999 CDC Flat Seat Rupture Disc with UNISERT® Holder Rupture Disc Pressure Relief Valve Model Teledyne Dresser Kunkle Set Farris 1900 Crosby Crosby Crosby 5000 Lonergan Type Size Material Pressure 2600 & 1900-30 JOS/JBS JB JO thru D & DB psig 4500 1900-35 5999 CDCV Flat Seat Rupture Disc with UNISERT® Holder 1.0 HASTELLOY...

ASME Code Symbol Stamp Available When Specified Pressure Equipment Directive Available When Specified HASTELLOY® is a registered trademark of Haynes International // INCONEL® and MONEL® are registered trademarks of the Inco family of companies HEADQUARTERS // 3160 W. Heartland Drive Liberty, MO 64068 USA Ph (816) 792 1500 | Fax (816) 792 2277 sales@contdisc.com Energieweg 20 2382 NJ Zoeterwoude-Rijndijk The Netherlands Ph +(31) 71 5412221 | Fax +(31) 71 5414361 cdcnl@contdisc.com Room 910, Tower B, COFCO Plaza No. 8 JianGuoMenNei Avenue Beijing (100005), P.R. China Ph +(86) 10 522 4885 |...