Type B Rupture Disk BSBsystems.com | BSB

1 Catalog #77- 2003 ASMEType B Solid Metal Rupture DisksFA-7R Safety Head2 Disk TypesDescriptionBThe type B solid metal disk, available in many sizes and metals, utilizes a dome-shaped disk with a 30 angular seating arrangement. System pressure is applied to the dished or concave side, subjecting disk metal to tension vacuum and / or back pressure occur, a vacuum support may be required. Consult the vacuum support selection criteria table for guidance on when to use a type BV, BRV or BSV or below the burst pressures identified in the Protective Ring Selection Criteria Table, type BR disks shall be used.

2 If burst pressure for type B disk is lower than shown pressures for standard sizes and disk metals, a BR protective ring should be to the minimum type B disk burst pressure, a type BRR disk is recommended. A lined type B disk having a low burst pressure is recommended to be selected as type BRR. The rings attached to each side of the solid metal disk improve handling and installation of low burst pressure or below the burst pressures identified in the Protective Ring Selection Criteria Table, when a vacuum support is required according to the Vacuum Support Selection Criteria Table, a type BRV disk shall be type BV Rupture disks applied in applications where strong vacuum conditions are present, a type BSV disk is recommended.

3 The BSV Rupture disk includes a soft ring to enhance sealing on its upstream side. The ring can be selected from aluminum, silver or a BR ring is also attached to the atmospheric side of a BSV disk, the assembly is called a Type BRSV Rupture B Forward Acting Rupture DiskType BR Rupture diskType BRR Rupture disk Type BRV Rupture DiskType BSV Rupture DiskType BV Rupture DiskType B Rupture DiskSoft gasket ring; Standard materials are aluminum or fluoropolymer. Special materials include silver or nickel. Protective ring material: 316ss, aluminum, Inconel , Monel , or nickel.

4 Note: Hastelloy is a trademark of Haynes International Inc. Monel and Inconel are registered trademarks of Special Metals Corporation and Its BRSV Rupture DiskForward Acting Tension Loaded Disks3 Vacuum Support Selection CriteriaWhere condition is:Full vacuum2/3 vacuum1/3 vacuumAbsolute pressure is:0 psia0bar5 back pressure disk material is:and pressure rating of disk is less than:psigbargpsigbargpsigbargAluminum450 313602527019 Silver700485603942029 Nickel1200839606672050 Monel 1200839606672050 Inconel 1200839606672050316 stainless steel1200839606672050 Table 1 Type B Rupture DiskDisk SizeAluminumNickel alloy 200 Monel alloy 400 Inconel alloy 600316 SSinmmpsigbargpsigbargpsigbargpsigbargps igbarg125260181,100761,4501001,8001242, ,200831, Ring Selection Criteria TableTable 2 When Support Ring will withstand Full VacuumDisk (alloy 200) (alloy 400) (alloy 600)

5 Stainless burst pressures below the values indicated in this table, a vacuum support shall be added to the type B or BR Rupture diskSoft gasket ring; Standard materials are aluminum or fluoropolymer. Special materials include silver or nickel. Protective ring material: 316ss, aluminum, Inconel , Monel , or 3 Note: Hastelloy is a trademark of Haynes International Inc. Monel and Inconel are registered trademarks of Special Metals Corporation and Its LiningsLiners may be applied to the upstream and downstream side of type B disks.

6 Protective ring is required for type B disks with Fluoropolymer lining on both sides in all disk materials except aluminum. Specify type BR, BRV, BV, BRSV, BRR, BSV. Standard Manufacturing Design Range for Solid Metal DisksDesired Burst PressureStandard - - - - - - - - - - - - - - - - - - - - - - - 500 - & & up+ 6%- 3%Features Tension loaded, forward acting Maximum operating pressure - 70% of marked burst pressure Gas or liquid service One piece construction (type B)- sizes from 1/8 to 44 inches (3 to 1,100mm)

7 Flange type installation in BS&B type FA-7R safety heads for installation between companion flanges Threaded union type installation in BS&B type UA safety heads Fragmentation - The type B ruptures in a random pattern and may fragment upon activation. Consult BS&B when pressure protection is required with minimal fragmentation High burst pressure capabilityBurst ToleranceBurst tolerance is the maximum expected variation from the disk stamped burst pressure. Manufacturing Design Range (MDR)When specifying a Rupture disk, an MDR will automatically be assigned to the specified burst pressure per the table.

8 As an example, if you select a B disk to burst at 80 psig, the standard MDR shown on the table (+9, -5) or 75-89 psig will apply. The marked burst pressure for the lot of type B disks shall be within the MDR 75-89 psi in this example. Once the disk is rated and stamped, 78 psig for example, the burst tolerance of +5% now applies to this stamped : The standard manufacturing design range can be reduced to 1/2 or 1/4 in most cases upon Burst PressureBurst Tolerance> 2 to < 15 psig ( > to < )+ psig (+ )15 to < 40 psig( to < )+ psig ( )>40+5%MaterialMaximum Recommended TemperaturePTFE500 F260 CFEP400 F204 CPFA500 F260 CNote.

9 Order as fluoropolymer liner and specify which side(s) applied5 Temperature Conversion TableTo determine the estimated Rupture pressure of a disk at other than 72 F (22 C), multiply related pressure at 72 F (22 C) by the temperature correction factor shown for the disk TempRupture disk materialDisk TempRupture disk materialsAluminumSilverNickelMonel Inconel 316ssNickelMonel Inconel 316ssF C %%%%%%F C %%%%-423-2531701641651551322003101549287 9484-320-1951521521441401261813201609286 9483-225-1431401411261291201653301669286 9483-200-1291361381221261181603401719286 9483-150-1011291301161231151503501779185 9482-130-9012712611612111414536018291859 382-110-79122123115120113141370188918593 82-100-731201221151191121393801939185938 2-90-6712012111411811213639019990849381- 80-6212012011411711113440020490849381-70 -5711912011311611013241021090849381-60-5 111911911211511013042021690849381-50-451 1911811211410912843022189849381-40-40118 11711111310812544022789839380-30-3411711 511011210812345023289839380-20-281161121 0911110712146023888839380-10-23115110108 110106118470243888393800-181141081071091 051164802498783938010-121131071061081051 144902548782948020-611110510510610411250 02608682947930-1110104104105103110520271 8582947940410810310310410210754028284829 4795010106102102103102105560293838194796 0151031011011011011035803048281947872221 0010010010010010060031681819478802610010 0100991009962032779809477903299999998999 8640338788094771003798999997999666034977 7993771104397989896999568036076799376120 4897989895989470037175789376130549697979 5989372038273779376140609596979498927403 937277937615065949596939791760404-769375 16071939496939790780416-7693751707692939 6929790800427-75927518082909295929689820 438-75927519087899195919689840449-759275 20093889095919588860460-7492752109987899 4909588880471-74917422010485879490958790 0482-739174230110848694899587920493--90- 240115828594899586940504--89-25012181849 3899586960516--88-260126--93889486980527 --87-270132--938894851000538--86-280138- -938894851020549--85-290143--93879484104 0560--85-300149--938794841060571--84---- -----1080582--83---------1100593--82-Tem perature Conversion Factor in % indicating typical variance from burst pressure at 72 F (22 C)6 Disk SizeInconel alloy 600316ssHastelloy alloy C-276inmmpsigbargpsigbargpsigbargMinMaxM inMaxMinMaxMinMaxMinMaxMinMax1 : Type B Rupture disk technology is available up to nominal size 44 (1100mm).

10 Consult BS&BType B Disk Specifications Minimum / Maximum Pressure Rating at 72 F (22 C) - Unlined DisksDisk SizeAluminumNickel alloy 200 Monel alloy 400inmmpsigbargpsigbargpsigbargMinMaxMin MaxMinMaxMinMaxMinMaxMinMax1 Size316ssHastelloy alloy C-276inmmMinimum pressure 1-sideMinimum pressure 2-sideMaximum pressure 1&2 sidesMaximum temperature FEPM