bursting discs - Technical guide
16Pages

TECHNICAL GUIDE GRAPHILOR® discs have numerous advantages : Very broad spectrum of corrosion resistance Use over a wide range of temperature (-50 C /+200 C), thermal isolation device for high temperatures Standard sizes for ISO PN and ASA couplings and flanges No ageing, ensuring a stable bursting pressure over time Available from DN 25 to DN 600 Available from stock for the most widely used DNs and EBPs EBP from 0,07 to 100 bars The main areas of GRAPHILOR® discs are : Chemical Petrochemical Pharmaceutical Aeronautics Plastics Electrical engineering For the protection of : Reactors Tanks Vats Reservoirs Circuit breakers use of

Mersen, specialist in corrosion resistant materials Mersen group is recognized as a leader in the design and manufacture of corrosion resistant equipment MERSEN offers : Graphite equipment : heat exchangers, columns… Reactive metals equipment : heat exchangers, reactors, tanks… ARMYLOR® PTFE/PFA-coated steel equipment : piping, columns, tanks… Experience combined with continous improvement and development of processes and materials allow Mersen to offer a range of GRAPHILOR® bursting discs best suited to your operating conditions. A GRAPHILOR® bursting disc is a safety component intended to...

A complete range of rupture discs The norms The discs are designed in accordance with Standard BS 2915 and the tests are carried out in accordance with Directive EN ISO 4126-2 GRAPHILOR® rupture discs and safety accessories are produced in conformity with European Directive 97/23/CE, category IV, module B and module D for group I gases. As a manufacturer, the EN ISO 4126-2 directive requires Mersen to take responsibility for the design of our discs. We therefore ask our customers the following specific process information: Operating temperature Operating pressure Maximum operating pressure...

Generalities Choosing a rupture disc The following parameters must be known when selecting a rupture disc: The effective burst pressure (EBP), the difference between the upstream pressure and downstream pressure The operating temperature The minimum active diameter defined by the exhaust flow Pressure and vacuum conditions The nature of the material in contact with the rupture disc Types of products Series Active diameter EBP in bars at 20 C EBP tolerance T range (C) Discs with removable membranes inches 1 50 to 600 2 to 24 0,07 to 0,34 25% -50 to +165 2 25 to 600 1 to 24 0,35 to 30 10% -50...

Traceability, markings and coding Traceability and marking. On disc supports with removable membranes, a label indicates : The active diameter The number of bolts The tightening torque The direction of bursting The diameter and number of bolts On single-piece membranes and discs, the label indicates : The active diameter The series number The bursting pressure The batch number of the graphite The standard used The number of bolts The tightening torque The direction of bursting The diameter and number of bolts The direction of installation The CE marking A document, available on request,...

Technical informations Assembly of a rupture discs The first step is to insert the disc or the supports and membrane assembly, with their rings and gaskets, between two pipe flanges The following are general recommendations to ensure correct installations : Use flanges with flat faces in standard sizes. The flanges must be perfectly clean and flat Respect the pipe flange bore indicated for each series Center the gaskets on the discs in order to even distribution of force Do not change the material of the gaskets without consulting the factory Respect the mounting direction of the disc The...

Technical informations Most common examples of assembly Protection of a safety valve In series The effective burst pressure of the disc should be more than the opening pressure set for the valve. The safety valve would operate after the bursting of the safety disc. Protection against overpressure and negative pressure In parallel The effective burst pressure of the disc should be higher than the opening pressure of the valve. The safety disc operates only when the safety valve fails. The upper disc insures the protection against over-pressure. The lower disc insures the protection against...

Rupture discs in GRAPHILOR® Series 7 Rupture plug Low flow rate use Diameter 12,7 to 19mm Height from 32 to 50 mm mm 12,7 1/2 32 3 19 ½ 38 1,4 14 C nm nm nm nm Kg mm mm mm 80 0,140 32 5,5 6,35 ½’’ 8 17 25-15 7 50 0,280 50 9,5 12,7 ¾’’ 9,5 24 28,5/22 10 max Relative bars* Torque loading inches h Gasket thickness diameter 0,4mm mm R Diameter d2 min H Diameter d1 Effective bursting pressure Average weight Diameter D Diameter d