Hot Spot Parallel Enquiry prEN 4126-6:2013 Bursting Disc safety devices

By BVAA’s Technical Consultant, Peter Churm

DRAFT prEN ISO 4126-6:2013 Safety devices for protection against excessive pressure – Part 6: Application, selection and installation of bursting disc safety devices (ISO/DIS 4126- 6:2013).

This document is currently submitted to the CEN/ISO Parallel Enquiry (5 month). This second edition cancels and replaces the first edition (ISO 4126-6:2003), which has been technically revised. It has been prepared by Technical Committee ISO/TC 185 “Safety devices for protection against excessive pressure” in collaboration with Technical Committee CEN/TC 69 “Industrial valves”.

This draft standard gives guidance on the application, selection and installation of bursting disc safety devices used to protect pressure equipment from excessive pressure and/or excessive vacuum.

• Annex A provides a checklist for the information to be supplied by the purchaser to the manufacturer.
• Annex B guidance on the replacement period of a bursting disc and annex C guidance on determining the mass flow rate, for single phase fluids, of a pressure relief system that contains a bursting disc safety device
• Annex D has been deleted.
• Annex E non-mandatory procedure for establishing the flow resistance of a burst bursting disc assembly.
• Annex F non-mandatory procedure for type testing of bursting disc safety devices
• Annex G typical performance characteristics for various bursting disc safety device types.

The requirements for the manufacture, inspection, testing, marking, certification and packaging of bursting disc safety devices are given in Part 2 of EN ISO 4126.

Comments should be forwarded to BVAA by Association members by end of May 2013 for onward submission to BSI/CEN.

Published in Valve User Magazine Issue 25


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