BS&B Safety Systems Rupture Disks (Bursting Discs)

Introduction :

At its burst pressure, the Sigma EXL™ Rupture Disk (Bursting Disc) dome reverses and opens by shearing around a circular score line located near the perimeter of the dome. The score line engages with one or more points on the integral hinge down stream of the disk.

The disk opens around its circular score line with the central petal supported by the hinge, avoiding fragmentation.The Sigma EXL™ Rupture Disk (Bursting Disc) is offered with a simple burst pressure tolerance.

No Manufacturing Design Range needs to be considered for this high Operating Ratio disk (effectively a 'zero' range disk).

The performance of every Sigma EXL™ disk is assured by proof pressure testing each disk to its maximum recommended operating pressure. The Sigma EXL™ Rupture Disk (Bursting Disc) provides the user with the highest Operating Ratio of any Rupture Disk (Bursting Disc) pressure relief device.

For users who wish to obtain the enhanced quality assurance testing of this disk design, and can accept more traditional Reverse Buckling Disk accuracy, the Sigma™ Rupture Disk is offered with a -5% Manufacturing Design Range.

Sigma EXL™ and Sigma™ Disk Features :

• Reverse Buckling Disk in Sizes 1"-8" (25-200 mm)
• High Operating Ratio: 95% of marked burst pressure
• High Operating Ratio: 100% of minimum burst pressure (CEN ISO4126-2)
• Standard 0% Manufacturing Design Range, optional -5%
• Designed for non-fragmentation
• Designed for Gas, Liquid, or two-phase flow conditions
• Fail Safe: Damage- Safety Ratio <1
• Saf™ technology
• Vacuum resistant
• Smooth process side of disk resists product accumulation
• Long service life in pressure cycling or pulsating conditions
• US Patent No.5167337 and worldwide patents pending
• For installation in BS&B type SRB-7RS™ Pretorqued Safety Head

BIO-SAF

BS&B Safety Systems BIO-SAF™ System

BS&B's comprehensive range of sanitary rupture disks (bursting discs), holders, and fittings has been specially designed with a uniformly smooth internal finish in non-contaminating materials for overpressure protection in sanitary/aseptic applications. The Bio-Saf range meets the demanding sanitary criteria necessary in today's pharmaceutical, biotechnology and food processing industries. 

All BS&B sanitary disk holders and fittings are designed with a standard sanitary clamp configuration to permit easy and fast disk installation. The holders may be connected to other sanitary tubing or fittings using standard clamps and sanitary gaskets. Holders and fittings are also available with butt, tank weld end connections or a flush mounted option. 

Surface Finish

Our standard surface finish on rupture disk (bursting disc) holders and fittings is 20~25Ra on all wetted parts. Polishing or electropolishing is used to meet customer special requirements.

Reverse Buckling and Composite Disk Nomenclature

Reverse buckling and composite disks are offered in type -S or type -ST (e.g. RLS-S, RLS-ST) to permit the use of a smaller sanitary connection.

Manufacturing Range of Reverse Buckling Disks

All reverse bucking disks may be offered with a 0%, 5% or 10% manufacturing range. The range is applied to the minus side of the requested burst pressure. 

Example: If a disk is ordered with 75 psig (5.17 barg burst pressure and a 10% manufacturing range, it will be tagged at a burst pressure between 67.5 psig (4.65 barg) and 75 psig (5.17 barg). 

Burst tolerance is the maximum variation from the tagged burst pressure. 

Disk tagged above 40 psig/2.76 barg.................... ±5% 

Disk tagged at 40 psig/2.76 barg and below.......... ±2 psig/0.138 barg

SKr-U Reverse Buckling Disk

Introduction :
The SKR-U™ rupture disk (bursting disc) is partnered with the UR-2 safety head to provide high integrity reverse buckling rupture disk (bursting disc) technology in a threaded union type holder. The SKR-U™ rupture disk (bursting disc) uses Saf™ technology (structural apex forming) to accurately control its burst pressure making it insensitive to the assembly torque variations that will occur in a threaded type holder.

The UR-2 safety head is available in three standard nominal sizes: 1/2 " / 15mm,3/4_" / 20mm, and 1" / 25mm. Standard inlet & outlet female threads are 1/2 ", 3/4 ", and 1" NPT. Custom thread configurations are available. The SKR-U™ rupture disks (bursting discs) are identified SKR-U™1/2" / 15mm, SKR-U™¾" / 20mm, SKR-U™ 1" / 25mm and are all supplied with permanently attached 3-D metal identification tags.

SURE-SAF ( CSR, CSI )

The ECO-SAF System

The ECO-SAF System

The type ECR reverse buckling Compression Loaded Style Disk provides over pressure relief in either gas/vapor or liquid application. The ECR disk is designed with a perforated circular score in the perimeter of the dome. Gaskets which are activated by assembly of safety head, cover the perforated score line to achieve a sealed construction. The snap action of reverse buckling disk technology enables very low burst pressures to be achieved avoiding the use of weaker slotted composite disk designs .At the disks burst pressure the disk reverse, opening along this perforated score line, relieving the overpressure.

• Overpressure protection at the lowest available reverse buckling burst pressures.
• Prevent fugitive emission from API storage vessels. The ECR disk may be installed below the emergency fire vent. Isolating the vent and eliminating leakage of the stored fluid. The vessels normal breathing vent will continue to operate.
• Relief valve isolation, an ECR disk may be installed at the inlet of a safety relief valve offering the following benefits:
• Reduces fugitive emissions.
• Less expensive valve trim may be used in corrosive applications.
• Valve life is extended by isolating valve parts from corrosive fluid.

• Sizes from 1" (25 mm) to 24 " (600 mm)
• Lowest burst pressure in a reverse buckling style disk.
• Designed to be non-fragmentation.
• Overpressure relief for either gas /vapor or liquid applications.
• Suitable for operation pressures up to 90% of the minimum burst pressure.
• High performance in pressure cycling or pulsating conditions.
• If installed damaged, disk will burst at the nominal burst pressure.
• Vacuum resistance. (May require additional vacuum support.)
• Low torque sensitivity
• Disk acts as a positive seal to prevent fugitive emissions.
• Smooth convex disk surface suitable for hygienic or polymerization applications.
• Ideal for relief valve isolation.
• Standard materials, Nickels, Alloys 200, Monel Alloy, Inconel Alloy 600, 316SS, Hastelloy C-276 and Tantalum.
• Patent No: 5,368,180, 5,413,237, and 4,751,938.

The ECR disk is a low-pressure reverse buckling disk designed with perforated circular score in the perimeter of the dome. When overpressure occurs, the disk reverses and opens along the perforated score line and folds around the pivot in the outlet of the Safety head. The pivot ensures that the disks petal is retained after rupture.

BS&B Safety Systems​ RB-90™ Reverse Buckling Disk

Highlights

For high pressure applications. MRB (The Machined Reverse Buckling Rupture Disk (Bursting Disc)) offers a one-piece design including both disk and housing. It is a uniform metal slug machined to a thin diaphragm in the center and then formed. When the reversal pressure is reached the disk snaps through and shears out completely at the disk/housing junction

Features

• Sizes ⅜" to 4"
• Pressure Ratings available up to 70,000 psig
• Opens full bore with no flow restrictions
• Design assures long service life with a very high resistance to fatigue
• Non-torque sensitive
• Maximum Operating Pressure to 90% of disk pressure rating
• No knife blades required for opening
• Use in gas or liquid service
• Designed to adapt to customer's unique application

• FRB Low Pressure
• SVI
• Rupture Disk (Bursting Disc) and Safety Relief Valve Combination

Forward acting, or conventional rupture disks (bursting discs) have been a mainstay in process applications since BS&B developed the first rupture in 1931. Developed in 1934, the Type B disk, the "granddaddy" of all rupture disks (bursting discs) is still the disk-of-choice in many applications.

Applying load to the concave side, the disk is subjected to tension forces. Forward acting disks regulate burst pressures by the tensile strength of the material.

For low burst pressures, the Type D disk has a slotted metal top section and a metal or fluorocarbon seal. For higher operating ratios, the scored NU-SAF family of disks is often selected for polymerization processes. Our VAC-SAF line offers protection from excessive vacuum or overpressure.

For tank car applications, the ITC disk protects intermodel tank containers while the SR-TC is a surge resistant disk for railroad took cars and over-the-road trailer service industry.

A wide range of standard rupture disk (bursting disc) assemblies is available for your specific application. These Threaded and Welded Assemblies are discarded after disk rupture. Customized designs are available for customer applications that cannot be met using standard assembly designs.
 

VAC-SAF

BS&B Safety Systems Assemblies - Custom Rupture Disk (Bursting Disc)

BS&B Safety Systems Graphite Disks

Monoblock Graphite Disks

MB & MBV

IMB

IMBL

AMB-HTA

BS&B Safety Systems Replaceable Element Disk

BS&B manufactures each graphite rupture disk (bursting disc) from a pure block of graphite. By impregnating the porous graphite with resin, you can be assured of a product that can withstand almost any aggressive chemical attack. Our manufacturing process achieves:

• Wide range of sizes from½" (12mm) to 60" (1200mm)
• Superior corrosion resistance
• Operating temperatures up to 400º F, rising to 800º F with the Hi-Temp Assembly (HTA) upstream of a disk
• Large burst pressure range (0.25 - 1000psig) (0.017 - 70 Bar)
• Zero manufacturing design range
• Tight burst pressure tolerances
• Supplied complete with gaskets for immediate installation and reduced downtime
• Elevated temperature testing at no additional charge
• Low KR (Flow Resistance) – Consult BS&B

BS&B Safety Systems Safety Heads

Safety Heads

BS&B Safety Systems Explosion Vents

BS&B Safety Systems Explosion Protection Systems

Common industrial processes have the potential for a dust explosion. Where combustible material is conveyed, filtered, heated, milled, or sprayed in a fine powdered form, the three elements of the ‘explosion triangle’ can combine: dust + air + ignition. When these occur in a confined and unprotected process volume with the dust dispersed, a deflagration can trigger resulting in an immediate overpressure and flameball.

An explosion risk assessment will typically recommend that a series of protection measures be implemented ranging from improvements in housekeeping to investment in protection equipment. Applying protection technology requires that the constraints of the process equipment, building facilities, environment and budgets are taken into account in achieving the level of personnel safety required by codes and standards.

Flexibility is provided by BS&B’s proven range of protection technology that includes explosion venting, explosion suppression, a choice of chemical & mechanical systems for the isolation of interconnected process equipment and spark detection & extinguishing equipment to manage a source of both dust explosion ignition and fire

BS&B Safety Systems Sensors & Monitors

SENSORS AND MONITORS

Alert Sensors® provide immediate warning of a ruptured disk when used with a BS&B Burst Disk Monitor or other suitable electrical monitoring equipment. When a disk or vent ruptures, the process flow through the device causes the sensor's conductive circuit to break. The disruption of the current flowing through the circuit activates a Burst Disk Monitor (BDM) or other suitable electrical monitoring equipment to give a visual and/or audible signal.

Features of BS&B Monitors and Sensors

• Instant Notification of a Ruptured Disk
• Quicker Corrective Action
• Activates Valves/Pumps to Control or Shut-Down Process
• Lessens Critical Downtime
• Reduces Product Loss
• Minimizes Environmental Pollution

BS&B Safety Systems Buckling Pin Relief Valves

BUCKLING PIN RELIEF VALVES

Buckling Pin technology offers an accurate and reliable means of calibrating pressure relief devices. BS&B has developed the BPRV™ Buckling Pin Relief Valve for in-line pressure or vacuum relief offering quick and simple external resetting. The BPRV is suitable for both gas and liquid applications, and provides a full relief opening at a pre-determined set pressure.

BS&B Safety Systems Safety Relief Valves

Safety Relief Valves

Standard right angle reclosing Safety Relief Valves, with conventional and/or balanced (bellows) designs. Available in full & semi-nozzle models, all Safety Relief Valves are direct action, with adjusting rings, spring loaded, pressure management devices. The are available in flanged & threaded connections, or special connection orders with a wide variety of options. Accessories are available, including a test gag, levers (packed or plain), detectors, and insulating jackets. The valves are available in carbon steel, stainless steel, and special alloys (duplex stainless steel, super duplex stainless steel, hastelloy, inconel, titanium, tantalum, etc.).

Safety Relief Valves models:

BS&B Safety Systems Flame Arresters

Flame Arresters, Detonation Arresters, Breather Vents,
and Pressure / Vacuum Vents

Flame arresters stop the transmission of flames through piping after an ignition event associated with combustible gas inside the piping. They also stop the transmission of flames into a tank or piping from an ignition event outside of a tank or piping that is venting combustible gas into the atmosphere.

The arresters are designed to reduce the heat associated with the flame as the gas flows through it. The heat is reduced to a point where the flame is extinguished. Each arrester is configured specifically to meet application requirements. Gas classification, flow requirements, pressure-drop requirements and the number of pipe diameters between the arrester and the flame’s ignition source factor into the arrester’s proposed configuration.

BS&B markets its flame arresters under the FlameSaf brand name.

Tank Vents

Tank vents (AKA conservation vents, breather vents or pressure/vacuum relief valves) prevent tanks from exploding due to overpressure. They also prevent tanks from collapsing, or imploding, due to vacuum.

The vents relieve overpressure related to pumping fluids into the tank, atmospheric heating of the tank and heating of the tank due to fire that is external to the tank. They also relieve vacuum related to pumping fluids out of the tank and atmospheric cooling of the tank. The customer chooses the point at which the vents provide relief of either pressure or vacuum.

BS&B markets its tank vents under the TankSaf brand name.

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