Shtokman Development AG

Shtokman LNG plant and Terminal

Valves Actuators and Control Panels Control ValvesRelief Valves

Technical meeting with Russian valve manufacturersMoscow 24th June 2010

2Key Points Shtokman Actuated Valves

Wide range of Product Temperatures -180 to +200oC Equipment will be installed in a Arctic Marine environment Partial Stroke testing required on Emergency Shutdown Valves Partial Stroke testing on Critical Process Shutdown Valves Valve sizes range 50mm to 1400mm Total number of valves approx. 2500 (GTU and LNG) with 500 valves

which are 600 mm or above and 6 are 1100 mm or above Valve Control Panels must be supplied as an integrated package Actuator winterisation must be addressed early

N.B.: Initial design is based on international norms. However RF equivalent norms are acceptable.

A design optimisation is on going and we expect a reduction of the actual number of valves.

3Environmental and Winterisation Requirements

Environmental Conditions :Conditions are applicable to all valve types, control panels and associated

accessories. Temperatures: Min./ Max.: -39C / +37C Relative humidity: Max. 75% @ -39C / Min. 40% @ +37C

Winterisation principles :For all valve types, control panels and associated accessories to protect them from

arctic conditions : Instruments and actuators protected by heated enclosure (electrical heater) Local operation such as valve testing facilities shall be inside the control panel.

Open/close and reset commands shall be on the front of control panel and mechanically protected

All valves types, control panels and associated accessories shall be able to operate to these extreme temperatures with appropriate winterisation protection.

Safety Related On/Off valves, control panels and associated accessories shall be able to operate to these extreme temperatures even in case of failure of winterisation protection

4ON/OFF ValvesActuation and Control panels

Actuation

All On/Off Valve Actuation will be Pneumatic or Electrical

Control Panel Control panel shall be of AISI 316L stainless steel and insulated Equipped with an electrical space heater (certified for use in zone 1 as a minimum).

5Control Valves

Control Valves will require the same level of attention as On/Off valves with regard to the Site Environmental Conditions and Winterisation

Control Valve Actuators are foreseen as Piston/Cylinder and Diaphragm Control Valve Types : Globe, Butterfly, Eccentric Plug, Multi-Stage

Letdown All control Valves will be fitted with a Smart positioner based on HART

Protocol

OTHER CONTROL VALVES Self Acting Valves Pressure Regulators Back Pressure Regulators

6Severe Service Assessment and Selection Criteria

Manufacturers will supply Valve Calculations as per ISA Guide Control Valves, Practical Guides for Measurement and Control

General Rules for determining Severe Service : Liquid and Compressible Fluids Service: Pressure Drop is > 50 Bar for any given

flow rate Flashing Liquid Service: Pressure Drop is > 30 Bar for any given flow rate

A more detailed description of determining Severe Service can be found in the project documentation

7Valve Testing

Valves will require to have all the relevant Test Certificates listed in the Specifications. Examples of Tests:

Leak Test Pressure Test Material Certificates Integration Tests (with Actuator & Control panel) Cyogenic Test where applicable

8Relief Valve General Requirements

The safety relief valves shall be of direct-acting angle pattern and full nozzle

Conventional spring-loaded safety valves shall be used in services where there is no back- pressure

Balanced bellows safety valves shall be used for variable back pressures Pilot operated valves shall be considered on services such as light gases

at high set pressure, on clean gas in pulsating service Safety relief valves on cryogenic services shall be supplied with extended

bonnet Weight loaded relief valves shall be used only for low-pressure services

9Valve Material

Valve Body and Trim material will follow the same selection criteria as described in the previous Manual Valve Presentation

Specific deviations from the selection criteria would be: In severe service where the suppliers standard is a higher specification than that of

the project e.g. ceramic or titanium Corrosive service/Chemical metering where suppliers standard is Teflon of equivalent

soft trim material

Typical Selection Table (minimum material requirements)

316 Stainless SteelStellite coated

A350 LF2 / A352 LCCLow Temperature Carbon SteelProcess Fluids (Gas, condensate, refrigerants etc.

316 Stainless SteelStellite coated

A350 LF2 / A352 LCCLow Temperature Carbon SteelHot Oil

316 Stainless SteelA182 F304 or A351 CF8MStainless Steel 304/304LCryogenic Service

Valve TrimValve Body MaterialFluid

N.B.: Initial design is based on international norms. However, suppliers can propose their standards

Thank you!