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FPSO with LESER safety valves

Production of safety valves
FPSO ship

Due to the trend towards oil production from remote or deepwater locations, FPSO (Floating Production Storage Offloading) units are increasingly used in the upstream Oil & Gas Industry. Safety is a primary concern on an FPSO. Safety valves are used on FPSOs to protect the different topside modules for:

•    Oil and gas separation and treatment
•    Compression
•    Water injection
•    Power generation, and other processes

 

Production of safety valves
FPSO topside modules

FPSO applications have special requirements to safety valves. They result from the diverse media and processes on an FPSO and the environment in which the FPSO operates:

•    Sea water or seawater / hydrocarbon emulsion as a
      protected medium: Valve materials must be
      resistant to corrosion to enable longer service
      intervals and to ensure the operational reliability of
      the safety valve.
•    Sour gas (H2S) service: Valve materials must comply to NACE/ MR0175 specifications
•    Offshore environment: Valve shell must be made from corrosion-resistant materials or
      adequately coated
•    Approval of the relevant classification societies (DNV, ABS etc.)

Also in logistics, FPSOs have special requirements because they operate globally. Spare parts and replacement valves must be available around the globe with very short lead times.

LESER Industry solution

The LESER Industry Solution for the specific operating conditions on FPSOs consists of following elements:

Corrosion protection concept

Mainly Duplex and Super-Duplex materials are used for corrosion resistance. With the API Alloy Concept, LESER offers these materials in cost efficient configurations and short lead times. Only the parts required by the specific application are made from Duplex materials. For different applications, there are different levels of corrosion protection.

Besides Duplex materials, also nickel-base materials like Monel, Hastelloy and Inconel are available in the API Alloy Concept.

NACE-compliant valve configurations can be ordered easily with Option Codes for all valves.

Coatings for marine environment are available, such as multi-layer and epoxy coatings.

Production of safety valves
Alloy Level Guideline for Corrosive Service

Classification society approvals

LESER safety valves are type-approved by leading classification societies. The table below shows some of them.

•    DNV - Det Norske Veritas
•    GL - Germanischer Lloyd
•    BV - Bureau Veritas
•    LROS - Lloyd‘s Register of Shipping
•    ABS - American Bureau of Shipping
•    U.S. Coast Guard Classification
•    RINA - Registro Italiano Navale
•    ClassNK - Nippon Kaiji Kyokai

In addition, third party inspections by classification societies e.g. for set pressure are possible. An overview of the approvals of the API safety valves you will find in the download section.

Contacts in your country

LESER GmbH & Co. KG

LESER GmbH & Co. KG

Telephone: +49 40 25165 100

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