What is the difference between the manufacturing range and the burst tolerance?
According to the ASME Code, Section VIII, Division 1: The Manufacturing Design Range is a range of pressure within which the marked burst pressure must fall to be acceptable for a particular requirement as agreed upon between the rupture disc manufacturer and the user or his agent. Simply put, the Manufacturing Range is the range of pressure in which a rupture disc’s marked rating must fall, in order to be accepted by the customer. The Burst Tolerance is the acceptable range around the marked rating in which a rupture disc might be expected to burst. ASME code specifies a Burst Tolerance of +/- 5% for burst pressures 40 psig (2,8 barg) and above, and +/- 2 psig (0,14 barg) for burst pressures below 40 psig. See specific product literature for Continental Disc Corporation and LOTRX type rupture disc burst tolerances. In summary: the Manufacturing Range applies during the manufacturing process; Burst Tolerance applies to the marked burst pressure after the manufacturing process is done.
