《经典的爆破片课程课件.ppt》由会员分享，可在线阅读，更多相关《经典的爆破片课程课件.ppt（42页珍藏版）》请在三一办公上搜索。
1、1,What is a Rupture Disk?,A designed weak point in a pressure system.Definition:A non-reclosing pressure relief device designed to activate at a specified pressure.,(Natural Weak Point),2,爆破片的选择范围,尺寸 size 额定直径从1/8” to 72” / 3mm 到1800mm 额定爆破压力 burst pressure10mBar to 9300 Bar温度 temperature-273 deg. C
2、 to 600 deg. C,3,材料 Material,标准Standard)AluminiumNickel316SSNickel Alloy 400Nickel Alloy 600Alloy C-276,特殊(special)TitaniumTantalumGoldSilverPlatinumOthers,爆破片材料最高适用温度,4,GB567标准,设计爆破压力 (design burst pressure) 设计爆破片时由需方提出的对应于设计爆破温度下的爆破压力值制造范围(manufacturing Design Range) 厂家和用户之间商定并认可的压力制造范围，最终标定的爆破压力必
3、须在此范围内，同时兼顾经济性和实用性。标定爆破压力(Marked burst Pressure) 同一批次爆破片在一定温度下进行爆破试验所得实际爆破压力的算术平均值，并最终标记在铭牌上的爆破压力值爆破允差 (Burst Tolerance)爆破片实际的试验爆破压力相对于标定爆破压力的最大允许偏差其值可以是用正负号表示的绝对数值或百分数当商定制造范围为零时此允差即表示对设计爆破压力的最大偏差且此允差范围亦为允许爆破范围,5,6,制造设计范围,A “range” of pressures agreed upon between user and manufacturer governing the
4、 pressure range within which the marked burst pressure must fall.厂家和用户之间商定并认可的压力制造范围，最终标定的爆破压力必须在此范围内。A “pre-manufacturing agreement” between the user and the manufacturer which defines the users acceptable range of pressures within which the disks must be rated (marked). 在生产前用户和厂家达成一致，共同定义的双方均可接受的压
5、力范围，爆破片必须在此压力范围内爆破。（标定的爆破压力）Offered to satisfy the need of “economics” and “availability”. 制造设计范围同时兼顾经济性和实用性。,爆破允差,7,8,最大操作比(MOP),Maximum pressure to which a disk may be exposed during normal operating conditions（正常工作状态下爆破片能够承受的最大压力）Varies from 50% to 95% of marked burst pressure depending on type o
6、f diskHigher operating pressure moves or “re-forms” disk material which results in fatigue and premature activation.,最小泄放面积和爆破片尺寸计算,9,10,Disk Tag爆破片标牌,ASME requires tag that shows:ManufacturerType Lot numberDisk MaterialSizeMarked burst pressureSpecified disk temperatureMinimum Net Flow AreaCertifie
7、d flow resistance KRUD Symbol (Hand Stamped)NB recognition,ASME 标准要求标牌标识以下信息生产厂家型号出厂编号爆破片材料尺寸标定爆破压力额定爆破温度最小泄放面积经过认证的流体阻力系数Kr值UD标识NB 标识,11,Last Variable: Directional Orientation爆破片动作方向,Forward Acting OR Reverse Buckling,Rupture Disks are installed in service in one of two directions,正拱型 OR 反拱型,12,有何不
8、同Whats the difference?,弹性负荷爆破片相对压力负荷爆破片有许多局限Generally, tension loaded disks have many performance limitations compared to reverse buckling disksThese limitations includeLimited cycle life有限的使用寿命Limited operating margin有限的操作余量Limited resistance to vacuum or back pressure without support有限耐受真空或背压Less
9、favorable sealing characteristics有限的密封性能Product buildup on process side of disk介质淤积MDR limitations制造范围限制,13,双向爆破Dual Acting Disks,Some disks are designed to relieve in either direction or they may be tension loaded or reverse buckling depending on which direction they are installed.These disks inclu
10、de the AV, Vac Saf and Hi-Lo series, Eco Saf series, and FSMThese disks have all the limitations of forward acting disks but may not have any of the advantages of reverse buckling disks.,14,In 1966, BS&B introducedReverse Buckling (Compression-Loaded)Technology1966年，BS&B 发明反拱型爆破片（压载型）技术,15,Reverse B
11、uckling Allows:反拱爆破片,Flat seating surfacesNon-fragmenting designExtended cycle/service lifeNo vacuum support required (typical)Smooth side of disk to processUp To 95% Maximum Operating Pressure,平面底座无碎片设计大大延长使用寿命无需真空托架爆破片接触介质面为光滑面，无物料积累问题做大操作压力可达到设计爆破压力的95%,16,Type S-90,Cross Scored 90% maximum opera
12、ting pressureAll features & benefits of the RB-90 are retained while eliminating the knife blade opening mechanism.,十字刻槽操作比达90%保留了RB -90的所有特性和优点，消除了刀片的局限,17,Recommended for gas service onlyIn liquid service (pure hydraulic)Slow pressure rise could allow the disk to “roll through” and not open.May ha
13、ve only a “cracked” score line.Would then break in forward acting manner with reduced opening that is in proportion to flow demand.,S-90,建议在气相中使用如果在纯液相中使用缓慢的压力上升使爆破片慢慢开启并泄露，无法全开可能在刻槽出产生一点裂缝可正向爆破，开口很小，与流量成正比,18,JRS DiskJRS型爆破片（1977年专利）(Patented 1977),Permits lower pressures in reverse buckling disks
14、than ever before相比之前的反拱爆破片可以达到更低的爆破压力,19,Type “JRS” (“JAWS” ),When reversal pressure is reached, the disk “snaps through”Metal is cut open by the “tooth ring”Petal is held captive by special design of the retainer bar,当系统压力达到爆破压力，爆破片快速反转金属片被齿形环割裂并开启开启的“花瓣”被特殊设计的挡板条截留，不会产生碎片,20,Recommended for gas se
15、rvice onlyDamage ratioShould a damaged disk be installedThe disk will reverse and open at a maximum of 1.5 times its rated pressure (Damage Safety Ratio),JRS,推荐仅用于气体环境损坏比如果一个损坏的爆破片被安装爆破片将在不超过标定压力1.5被的压力下爆破(安全损坏比）,21,The FIRST reverse buckling disk designed for liquid service (full hydraulic) applica
16、tions第一个设计在全液体工况中使用的爆破片,RLS Disk(BS&B Patented 1983)RLS型爆破片（BS&B1983年专利）,22,A circular-scored reverse buckling rupture diskDesigned specifically for use either in liquid or gas service“Yolk” prevents fragmentation,环形刻槽的反拱爆破片特殊设计既可用于液体也可用于气体环境“Y”型衬板防止产生碎片,23,RLS FeaturesRLS特点,Liquid and gas service90
17、% “MOP”Withstands full vacuum without supportMinimal fragmentationDamage resistantDamage safety ratio of 1.5 or lessThe first full opening reverse buckling disk for isolating liquid-certified valves,液体和气体应用操作比达90%无需真空支架可抗全真空环境防止产生碎片抗损坏损坏安全比1.5第一个可以隔离液体应用阀门的反拱爆破片,24,Sigma-EXLReverse Buckling Disk,25,
18、Proof Pressure Testing压力测试,Highest Maximum Operating Pressure95% of Marked Burst PressureValidated by 100% proof pressure testing of all disks prior to shipping,最高的操作比95%所有爆破片出厂前验证测试,26,Sigma PerformanceSigma 性能,Gas & Liquid ServiceLong Cycle Life Vacuum Resistant 95% ASME Maximum Operating Pressure
19、Smooth Side of Disk to Process Damage Safety Ratio 1!Resists Backpressure Equal to Burst Pressure,气液均适合使用寿命长 抗真空环境 ASME标准的95%操作比工艺侧表面光滑 损坏比 1!可抵抗与标定爆破压力相同的背压,27,夹持器The Safety Head,BS&Bs name for the holder is a safety headThere are many different safety head typesPre-assembled预装配Full bolted全栓紧Pre-to
20、rqued预拧紧Pre-torqued and full boltedUnion组合Clamped卡箍Threaded螺纹Welded焊接,28,The Safety Head,There are many different holder typesPre-assembled,29,The Safety Head,There are many different holder typesFull bolted,30,The Safety Head,There are many different holder typesPre-torqued,31,The Safety Head,There
21、 are many different holder typesPre-torqued and full bolted,32,The Safety Head,There are many different holder typesUnion,33,The Safety Head,There are many different holder typesClamped,34,The Safety Head,There are many different holder typesThreaded,35,The Safety Head,There are many different holde
22、r typesWelded,36,SRB-7RS Safety HeadUnique design features distinguish it from other rupture disk holders,STA-SAF System Safety Head STA-SAF 家族夹持器,SRB-7RS 夹持器设计独到，与其他类型夹持器显著不同,37,Bite Type SealBubble tightOffset ShoulderRestricts movement of diskMachined RadiusHelps prevent fragmentation,咬合密封 -保证完全无
23、泄漏偏执肩部设计防止爆破片过早反向拱起倒角设计防止产生碎片,38,Offset Locating Holes & Pins偏执定位孔和定位销,Centers the disk correctlyAssures correct directional orientation,确保爆破片居中安装确保安装方向正确,39,Pre-Torqued Assembly预拧紧装配,Can be assembled in the instrument or maintenance shop before being sent to field as a one-piece unit.Pre-torquing a
24、ssures proper load on the disk.Does not rely on companion flange bolts for proper torque load.Pre-torquing allows removal and reinstallation of complete “device”,可以在送至客户现场前安装在车间里装备上爆破片，然后作为一个整体供至客户现场。预拧紧确保爆破片上的负载合适.不用依靠连接法兰加紧爆破片。可以将爆破片和夹持器作为整体卸载或重新安装,40,Proper torque is critical since overloading ca
25、n crush the seal合适的扭力至关重要，因为过度拧紧会损坏密封,“Cocking” crushes seal or results in “unbalanced” load changing disk performance“歪斜”会损坏密封层或导致爆破片失效,Unbalanced / Uneven Torque不平衡扭力,41,Other Products and Services其他的和服务,Many variations of standard productsGraphite Rupture DisksExplosion Suppression, Isolation, Fl
26、ameless VentingBuckling pin Relief ValveCustomer designed product.Inventory Management,很多不同的标准产品石墨爆破片爆炸抑制，隔离，无焰泄放工厂检查及审计维修，安装培训认证审计库存管理,42,After all other controls have failed to prevent the overpressure在所有防止超压的控制措施失效后The rupture disk or explosion vent responds to the overpressure, protecting the system, the facility, and its employees爆破片仍可以快速响应超压，保护系统、设备和工厂的人员,The Safety Device of Last Resort最终手段,
