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Buckling Pin Devices

Peter BoulosMEA Sales Manager BS&B Specialty ValvesPeter.Boulos@bsbsystems.ae

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BPRV Design and Development

• Designed as:A non-reclosing ‘reclosable’ Pressure Relief Device

– An alternative non-reclosing Pressure Relief Device• Usually Rupture Disks.

– An alternative to reclosing Pressure Relief Valves• API series and pilot operated valves.

– To Provide in-line Pressure or Vacuum relief • Easy to upgrade a rupture disk position• Installed directly between companion flanges

– To offer quick and simple External reset, without

opening flanges/piping!

Buckling Pin types

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Buckling Pin relief ValveBPRV

Inline Body Configuration

Bucking Pin API Series Valve BPAV

Angle Body Configuration

How it works?

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- Offset shaft butterfly valve concept. - The offset of the shaft results in a turning moment - Moment is transferred to force to buckle the PIN.

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Enclosure & Mechanism

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PART LISTIDENTIFICATION

1. Set Screw2. Buckling Pin3. Pin Holder4. Stop Block5. Latch6. Input Arm7. Trigger8. Lever Arm9. Pivot Assembly10. Contact Points

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11. Bumper

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Replacing Buckling Pin

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Buckling Pin Relief Valve Set Pressure Control

Based on Euler’s Law* which allows us to predict the compressive load required to buckle the pin

*1776 German scientist

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Force to make pin buckle 2

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E: Modules elasticity

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60” BPRV testing

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Sensor - Indicator

• BPRV Closed-Green• Sensor Enclosure is to IP66

/ Nema 4 or 4X’ others by request

• Cables can be conduit connected

• Sensor switch to be electrically specified by user to meet local electrical standards

Sensor installed on free end of shaft

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Buckling Pin Cartridge SAF-T-PINpatent pending

• Cartridge is a push fit & pull out component

• Cartridge is a 1-way fit component

• Used pin is visible through plastic tube

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BPRV Response Time

-a function of set pressure….Based upon an 8” Nominal Size;Set Pressure(psi) Response Time (msec)

10 16021 10545 75

100 55142 45 210 40267 35

Response time defined as the period from first rotation of the shaft to latched full open.

Compares to typical pressure relief valve response times of 100~500 msec

International Codes & Standards

Buckling Pin Valves are recognized by the following standards as an alternative to spring loaded valves and rupture disks:

– ASME Section VIII UG-138 - UD stamp Required• Formally known as ASME Code Case 2091-3• Buckling pin devices may be used as described below:

(1) A buckling pin device may be used as the sole pressure relieving device on a vessel.

(2) A UD stamped buckling pin device may be installed between a pressure relief valve and the vessel provided

International Codes & StandardsBuckling Pin Valves are recognized by the

following standards as an alternative to spring loaded valves and rupture disks:

– API 520 / 521 / 526 / 537• Buckling pin devices are compression-loaded pin-actuated

devices and are the most extensively used type of pin-actuated device

– EU Pressure Equipment Directive• EN ISO 4126-2• Requires a “CE Mark” for all pressure relief devices over 0.5 barg

– ISO 9001 Quality Systems Certification • BS&B’s Manufacturing and assembly facilities are ISO 9001

Certified.

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Flare Application• Many customers are moving

towards emission reductions projects and closed flare systems can be used to obtain random flaring instead of constant flaring (27% reduction).

• The BPRV is used as a relief device on the bypass of the control valve incase it should fail closed, in accordance with API 537.

From API 537: “Flare system safety considerations require valve bypasses, each of which must contain a fail-safe device (rupture disk or buckling pin)."

To Flare

Fail Open Quick Control Valve

Buckling Pin Valve

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Flash

Flare Application

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Flare Application

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Buckling Pin Valves - ApplicationsESP Pump Protection

BPRV Closed – Fluid pumps freely to Oil/Water separator

BPRV Open – Flow line blocked, flow recirculates to well casing

Advantages of the BPRV in this Application

• Pump is protected by a mechanical fail safe device• Well oil/water column is maintained even with a blocked outflow pipe, reduces the

potential of the well drying out and needing to be re drilled• BPRV latches when open, eliminates chattering thus flow and pressure to pump are

constant, reduces system hysteresis and therefore improves plant reliability

Shell Tube Heat exchanger

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The BPRV has been used to protect the shell side due to the fast response time. Reducing the downtime compared to the rupture disks.

The Buckling Pin API-Series Relief Valve

BPAV

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The Buckling Pin API-Series Relief Valve – BPAV*

• The First API Series Buckling Pin Relief Valve

• Same body Configuration as API Safety Relief Valves

• Piping Dimensions are API Standard

*US & International Patents Pending

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The Buckling Pin API-Series Relief Valve

• Buckling Pins are installed with cap-screw

• Only takes minutes to reset!

• The Calibrated Pin certifies the device!!!

• Operate to 90% of set pressure with no simmering!

• No orifice, high capacity

ClosedOpen

Product Capabilities

• BPRV - Inline– Sizes, 2” ~ 60”– Pressures, 1 psig ~ 2250 psig– Temperature, -196C ~ +260C– Tolerances, +/- 5%, +/- 2 psi less than 40 psig– Gas / Liquid / Multi Phase Media

• BPAV (-R) – API Series– Sizes, 1” x 1.5” ~ 12” x 14”– Pressures, 1 psig ~ 5000 psig– Temperatures, -250 C ~ + 327 C– Tolerances, +/- 5%, +/- 2 psi less than 40 psig– Gas / Liquid / Multi Phase Media

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After Sales Focus

• BS&B is there to support our customer anywhere in the world

• BS&B supplies Complete Training seminars to operators.

• BS&B service experts can supervise installation,commissioning and give preventative maintenance training.

End User Reference ListEnergy Industry

Exxon - Baytown, Texas Esso – Kome, Chad Aramco - Saudi Arabia SABIC – Saudi Arabia Imperial Oil – Ontario, Canada Petrobras - Brazil PDVSA - Venezuela BP/Amoco – UK/USA/Azerbaijan Shell – Singapore / Nigeria/Brunei/Aberdeen ConocoPhillips – USA / Canada Talisman Energy – UK Chevron-Texaco – Kazakhstan PETRONAS – Malaysia Woodside, Pluto LNG – Australia NGC – New Zealand ADMA OPCO – UAE EnCana – Canada Chevron Amoseas – Indonesia Qatar Gas – Qatar Qatar Petrolum - Qatar Boruge 2 – UAE TransCanada - Canada ConocoPhillips, Darwin LNG – Australia Grain LNG – UK Japan Petroleum and Exploration – Japan Inpex Corporation - Japan Petrofac – UK Keyera – Alberta, Canada GASCO – UAE PDO – Oman

Process Industry

• Merck - Danville, Pa, USA• Unocal - Kenai, Alaska, USA• Hoechst Celanese – Texas, USA• Dow – Germany & Canada• DuPont – Kentucky, USA• GE Plastics – Indiana, USA• Severn Trent – UK• UCB – S. Carolina, USA• IMC – Michigan, USA• Hanford Nuclear – Washington, USA• Dow Equate – Kuwait• Caribbean Nitrogen – Trinidad &

Tobago• Chevron Phillips – USA / Saudi Arabia• Pittsburgh Paints Group, PPG – USA• MEW – Kuwait• Nova Chemical – Alberta, Canada• Peru LNG - Peru

Questions?

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