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Seal Gas Conditioning Skid for Kvitebjorn

Industry: Oil and GasMarket: ProductionApplication: Seal Gas Conditioning Skid for turbo compressor

Requirements: - PED category 3 for the complete system with TÜV inspection - Cleanlines and flushing test with nitrogen (NORSOK L004) - Function and inspection test - ATEX certification for zone 2 - NACE MR0175 for booster and process lines

The Kvitebjorn natural gas field lies approx. 130 km west of the Sognefjord (Norway) in the North Sea. A project to increase the recovery rate was tendered in the year 2010 by the operating com-panies.

Maximator received the contract to supply a Seal Gas Conditioning Skid for the module‘s turbo compressor. The Seal Gas Conditioning Skid sup-plies the turbo compressor during start-up and shutdown of the system with Seal Gas (natural gas).

MAXIMATOR GmbH, Lange Strasse 6, 99734 Nordhausen, Telephone +49 3631 9533 – 0, Telefax +49 3631 9533 – 5010, www.maximator.de, info@maximator.de

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according to the NORSOK M-601 standard. Only ANSI flanges (1500 lbs) made of Duplex are used as connections. The Seal Gas is filtered on the inlet side with redun-dant designed 5µm gas filter. A clogging device with pressure transducers permanently inform the opera-tor about the dirt level of the filter.

Due to the low environmental temperatures at the place of use, the system is additionally equipped with heat tracing for the Seal Gas supply and a 30 kW gas heater at the system outlet. All electrical installations comply with the NORSOK E-001 Standard and the ATEX directive. One of the innovation on this system is the use of a new maintenance concept for the boosters. The boosters can be removed for maintenance issues out of the system in just a few steps. An intelligent solution with which the downtime and maintenance times are considerably reduced by the operator of the system.

Please feel so free to contact us for further informa-tion:

info@maximator.de www.maximator.de

The Kvitebjorn natural gas field lies approximately 130 km west of the Sognefjord (Norway) in the North Sea. The natural gas deposits are developed with a fully-integrated fixed steel platform with drilling and process facilities and living quarters.

Approximately 4 billion cubic metres of natural gas per year have been recovered from a depth of appro-ximately 4000 metres since 2004 on the Kvitebjorn platform.

The gas is piped to Kollsnes in Oygarden, Norway. After processing at Kollsnes, the dry gas is piped to continental Europe.

A project to increase the recovery rate was tendered in the year 2010 by the operating companies. Since then, the construction and installation of a compres-sor module for the pre-compression of natural gas has commenced.

At the beginning of 2014, the compressor module on the Kvitebjorn platform will be taken into operation and increase the recovery rate by 55% - 70%.

The Project

Maximator received the contract to supply a Seal Gas Conditioning Skid for the module‘s turbo compressor. The Seal Gas Conditioning Skid supplies the turbo compressor during start-up and shutdown of the system with Seal Gas (natural gas).

To compress the natural gas, there are four Maxi-mator 8DLE1,65 boosters in use in a special version fully made of stainless steel. The high pressure parts of the booster comply with the NACE MR-0175 directive. The tubing on the drive section is made of 6Mo (screw-connected), a high corrosion-resistant special material for offshore applications, and 316L (flan-ged).

On the high pressure section, the piping is welded

MAXIMATOR GmbH, Lange Strasse 6, 99734 Nordhausen, Telephone +49 3631 9533 – 0, Telefax +49 3631 9533 – 5010, www.maximator.de, info@maximator.de

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Seal Gas Conditioning Skid overview:Medium: Natural Gas

Dimensions: 2200 x 2000 x 2400 (Width x Depth x Height in mm)

Weight: 4650 kg

Process connections: ANSI B16.5 #1500 RTJ

Air connections: ANSI B16.5 # 150 RF

Piping: - Screw connections and piping made of 6Mo- Flanged connections made of Duplex- 100% x-ray test (according to ASME V)- 100% PMI - Positiv Material Inspection- 10% Ferrit Content Measurement- Hydrostatic pressure test at 375 bar (NORSOK L004)

Paint coating: Grey according to NORSOK M-501 paint system 6

Filtering: 5µm gas filter according to EN 13445, PED, with clogging device using differential pressure transmitters

Tempering: - Gas heater, 30 kW, Eexde IIA T3, IP56- Heat tracing, 4 kW for piping- Isolation of valves with offshore isolation blankets

Frame: - Material 316Ti- tested according to the DNV 2.7.1 directive- Strength analysis according to FEM- Levelling and assembly equipment

Tag plates: - NORSOK compliant- 100% Documentation of torque of all screw connections

Service: - Components with >25 kg are equipped with pad eyes- Gas leakage measurement system (using orifice and differential pressure transmitter) for booster

Certification / testing: - PED category 3 for the complete system with TÜV inspection- Cleanlines and flushing test with nitrogen (NORSOK L004)- Function and inspection test- ATEX certification for zone 2- NACE MR0175 for booster and process lines- Monitoring of paint coating with FROSIO Level III inspector- Certification according to NORSOK Z015- Risk analysis according to NORSOK Z015 and machinery directive

MAXIMATOR GmbH, Lange Strasse 6, 99734 Nordhausen, Telephone +49 3631 9533 – 0, Telefax +49 3631 9533 – 5010, www.maximator.de, info@maximator.de

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Fig.: Seal Gas Conditioning Skid front view

Fig.: Seal Gas Conditioning Skid rear view

Fig.: Seal Gas Conditioning Skid right view

Fig.: Seal Gas Conditioning Skid left view

MAXIMATOR GmbH, Lange Strasse 6, 99734 Nordhausen, Telephone +49 3631 9533 – 0, Telefax +49 3631 9533 – 5010, www.maximator.de, info@maximator.de

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Fig.: Filter clogging device with pressure transducers

Fig.: Orifice-based leakagemeasurement with differential pressure transmitter

Fig.: Temperature monitoring in a 4“ container for optimised incedent natural gas flow of the thermowell

Fig.: bi-lingual TAG plate

MAXIMATOR GmbH, Lange Strasse 6, 99734 Nordhausen, Telephone +49 3631 9533 – 0, Telefax +49 3631 9533 – 5010, www.maximator.de, info@maximator.de

High Pressure Technology • Testing Equipment Hydraulics • Pneumatics

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Fig.: torque certificate for flange connections

Fig.: NORSOK compliant cabeling

Fig.: 8DLE1,65 with heat tracing

Fig.: ATEX cabinet for temperature monitoring