Pressure control valves for compressor station in Baltic Pipe project

Pressure control valves for compressor station in Baltic-Pipe project

The Baltic-Pipe project will transport natural gas from Norway to Denmark and Poland. The 900 km long pipeline will increase energy reliability in Europe with up to 10 billion cubic meters of gas per year. In addition, the transition from coal to natural gas is expected to reduce carbon dioxide emissions. [wikipedia link]
Compressors in compressor stations along this pipeline are responsible for maintaining or increasing the pressure of the natural gas. This is the only way to transport it over long distances! Along the 900km pipeline, compressor stations are built at predetermined intervals for this purpose.

Project data

company: Siemens

industry: natural gas pipeline: Baltic-Pipe project

services: control valve sizing and dimensioning, coating according to ISO12994 directive

products: A. Hock series 2000 control valves, A. Hock series 2060 control valve

Exact pressure control of seal gas in Siemens compressor

Gas-lubricated seals (dry gas seals) are used in compressors to ensure a reliable seal to the atmosphere with as little friction as possible. Sealing gas (nitrogen, argon or carbon dioxide) is fed into the seal chamber as lubrication. Its purpose is to keep the pressure inside the chamber higher than the surrounding gas pressure and prevent other gases or liquids from entering the compressor.

Pneumatic pressure control valves for seal gas

The pressure of the sealing gas must be controlled quickly and precisely. The highest requirements for this control are met by our 2060 High Pressure Series valves.

We were also able to guarantee the high requirement for the design pressure (120 barg) and the design temperature (-20 to 120°C). A stainless steel cast housing in pressure rating ANSI1500 was chosen here.

Coating of pneumatic actuators according to ISO12944

ISO12944 is a standard that specifies guidelines for corrosion protection on steel structures. Operators of industrial plants use this standard to specify requirements for coatings and corrosion protection properties.

In order to ensure high corrosion resistance in this project, a C5-M coating according to ISO12944-2 C1-C2 was used for the drive chambers.

This requires painting several primer, intermediate and top coats. For each intermediate step, the coating thickness must be measured and recorded. The total coating thickness must be guaranteed, as must the 24 h drying time per coating.