Chloride induced stress corrosion cracking (CISCC) in pipelines

Chloride Corrosion of pipeline - Chloride induced stress corrosion cracking (CISCC).

The energy sector has passed through various atmospheric and process environmental challenges. How big is the challenge? It depends on the region, application, process media, and industry. It is also not limited to these factors. One of these challenges is Chloride Induced Stress Corrosion Cracking (CISCC).

CISCC is one of the most common reasons for steel deterioration. It attacks austenitic stainless steel components in the petrochemical industry.

Corrosion can lead to catastrophe. It has the potential to discharge toxic substances and stored energy. Austenitic stainless steels are iron-based alloys that contain 19 percent chromium and 9 percent nickel. These steels have high corrosion resistance in most aqueous and atmospheric settings because of passivation by a thin layer of chromium oxide. Humid and wet environments containing chloride ions can cause pitting. It also causes crevice corrosion of austenitic stainless steel components.

Many companies use 300 series stainless steel. It offers excellent resistance to general corrosion. However, even 300 Series stainless steel is susceptible to CISCC.

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DBB system in instrument piping – a cost effective safety solution

DBB system in instrument piping – a cost effective safety solution (BA Series).

I remember very well when we started the development of our Double Block & Bleed Valve Series. We called it “VariAS-Blocks”. Production started 20 years ago, and we have made many improvements since there.

We based the design on the standard SHELL MESC SPE 77/165 (which the MESC SPE 77/170 superseded) and EEMUA 182.

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Why do material traceability and type 3.2 certification matter?

Why do material traceability and type 3.2 certification matter?

Today, manufacturing has become global. Imagine a salesman in Europe or America. He supplies his product for a project in the Middle East, coming from their factory in India, which sources its raw material from China or other parts of the world. It has support and customer service from Southeast Asia. This scenario is common in companies with operations across the globe.

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Cryogenic valves for LNG application – Part 2

Cryogenic valves - LNG application.

In our second part of the cryogenic valve series I would like to responsive on questions like “What are the challenges of using cryogenic?”, “Selecting a valve for cryogenic service.”, “How can engineers ensure tightness of cryogenic valves?” and “What should engineers pay attention to during assembly of cryogenic valves?”.

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Cryogenic valves for LNG application – Part 1

Cryogenic valves - LNG application.

One of our customers needed a primary isolation valve for a pressure measurement on a container ship. The ship uses natural gas power. The valve had to meet the Fire Safe API requirements. It also had to pass a cryogenic test with liquid nitrogen (-196 ° C). The container ship rides under the American flag. Thus, an independent examiner had to administer the test. This examiner came from the American Bureau of Shipping (ABS) and the US Coast Guard.

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All about Close Coupled Flush Ring

All about Close Coupled Flush Rings.

The chemical industry uses flush rings for diaphragm seals. These rings prevent clogging of the instrument connection. The technician mounts the ring between the process flange and the diaphragm seal. It has flushing ports and membranes. The flushing ports allow users to wash out particles from in front of the membrane. It also has a pressure chamber, which users can vent, drain, or fill with cleaning liquid. The user can then flush the chamber.

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Provide usability for EPCs

Flexible alignment of the pressure gauge display.

In plant construction, you often come up against challenges where standard valves no longer fit. Then, you need professional support who can advice you what to do when standard solutions don`t meet the requirements of the installation.

Some time ago we have created a simple but very helpful solution for a pressure gauge manufacturer. The solution refers to the alignment of the pressure gauge display.

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Valves in extreme cold: 3 criteria are decisive

Arctic operation valves for extreme cold.

Whether in Alaska, Norway or Russia: Industrial valves, such as those used in chemical plants or the oil industry, are exposed to extreme cold as low as -55°C in some regions. However, not all industrial valves are suitable for operation in extreme cold. Three criteria are decisive.

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Ultrasonic Flow Meter Applications

Ultrasonic flow meter applications.

Ultrasonic flow meters are used to measure hydrocarbon gases in applications which require wide range (turn-down ratio), very high or low flow, low restriction, high accuracy or any combination of these from low pressure to super-high pressure.

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