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Blockage of leak detection system

A leak detection system is installed at the High Pressure equipment items of a Urea Plant in order to detect any leakage in these HP Equipment. Normally vacuum is maintained in this system, blockage i

n the system is checked by opening atmospheric valves and breaking the vacuum on a defined frequency of one month. We could not check the blockage on this defined frequency, we performed a blockage test after a period of 10 months; blockage was found in valves V-16 & V-17 in the leak detection system of the HP Stripper. After further investigation it revealed that the blockage in the leak detection system was inside the stripper top dome. We tried to de-block the system with instrument air having a pressure of 7 bar and with low pressure steam but this failed. Then on the running plant we tried to de-block using an argon cylinder having a pressure of 100 bar and de-blocked the lines at 30 bar. The root cause of the blockage was corrosion inside the leak detection tube due to moisture ingress through the atmospheric valves. The equipment condition was found healthy on inspection during a turnaround.

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Leak Detection Safeguarding Stamicarbon's High Pressure Urea Vessels

Urea solutions are not very corrosive, but ammonium carbamate, an intermediate in urea synthesis is highly corrosive. To protect the carbon steel high pressure synthesis equipment from corrosion, stai

nless steel loose liners are commonly applied. With a loose liner a hazardous situation may arise if a leak occurs and carbamate containing fluids enters the space between liner and carbon steel. For this reason Stamicarbon designed a system which continuously monitors for leaks to allow safe operation of said equipment.

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ADVANCE MONITOR™ Leak Detection Monitoring System

Stamicarbon’s ADVANCE MONITOR™ Leak Detection Monitoring System for both new and existing High Pressure equipment. Existing Leak Detection Monitoring System can be inspected to ensure proper operation

.

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Stamicarbon Stripper Performance in Non-Stamicarbon Plants

This paper describes the successful experience of a Stamicarbon designed Safurex® HP Stripper in a world scale Snamprogetti urea plant commissioned in early 2001. The Stamicarbon designed Safurex® HP

Stripper replaced a bi-metallic designed Snamprogetti stripper in 2003 which suffered extreme corrosion issues within a short period after startup in the bottom channel section of the vessel that caused persistent operational outages and huge financial losses. The problems encountered with the original HP bi-metallic stripper and results of the decision to replace the bi-metallic tube stripper with a HP Safurex® stripper are addressed. The subject Safurex® stripper was in service for 850 operational days from March 2003 up until November 2006, after which the subject stripper was returned to Canada and installed in another Snamprogetti urea plant in 2007. The subject stripper has been in operation in Canada since 3Q 2007 and has had no issues in its new location as of this writing.

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Stamicarbon Critical Proprietary Equipment

Quality & Safurex • Proprietary Equipment • PEQ procurement

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Stami Urea Advance References

Stami Urea Launch, Advance or Evolve

Read everything in our corporate brochure!
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Report of the steps description
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A specialty SAFUREX™ for HP stripper tubes

This paper presents a historical overview of the corrosion behavior of the Safurex® HEx tubes in HP strippers and gives an account of the development of the new specialty grade. 

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Miscellaneous
WORLD UREA MARKET DYNAMICS

Stamicarbon: leader in urea technology • Global supply-demand outlook • Urea price outlook • North American’s unique nitrogen industry, supply-demand and trade • Cost competiveness of North Americ

an producers • Investments drivers for North American projects • Key take-aways

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World & Russian Market Dynamics

Stamicarbon: leader in urea technology Global supply-demand outlook Urea price outlook Cost competiveness of Russian producers Trade flows Investments drivers for Russian projects Key take

-aways

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Urea Producers & Project Development

1. Historical review presents in the region 2. Stamicarbon philosophy aplication: Full Life-Cycle 3. Successful cooperation practices 4. Project Development 5. New business development: O&M an

d Training 6. Conclusions

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Green Ammonia
Green Ammonia

Stami Green Ammonia

The answer to a more sustainable future
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Unlocking the potentials of innovative fertilizers

The required global food production increase by 70 percent must be achieved mostly from land currently under cultivation. Balanced fertilizers containing micronutrients are increasingly found importan

t to boost yield, enhance the nutrients.

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The impact of low energy prices and increasing capacity

Over the past decade we have seen many new urea projects being awarded, with the vast majority in China and US. Industry analysts foresee an increasing overcapacity, but how much capacity will effecti

vely hit the market?

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Presentation Gral+AN

• Stamicarbon licensed nitric acid technologies • Between 50's-80's licensed >40 plants worlwide • 20 Stamicarbon HNO3 plants still in operation

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How rigorously plant modeling can advance your urea business

The use of first-principles models to support process operations has been practiced in the chemical and petroleum industry for over 40 years; however their appearance in urea plants is very limited. A

ttempts making such urea models have been limited in scope and usage, due to the rapid rise in complexity, execution time, and difficulties encountered as model size increases to encompass sufficient fidelity and scope to address overall economic impact to  the business. Urea plant models however can encapsulate a large amount of process knowledge and companies start realizing significant value from the use of these models in offline and online model based applications. Such applications include real-time optimization, model predictive control, data reconciliation, virtual sensors, process performance monitoring and total plant monitoring systems to name a few. This paper gives an overview on Stamicarbon’s capabilities and products related to urea plant modeling. These models are typically implemented in the ADVANCE and EVOLVE life-cycle of a urea plant. In the LAUNCH phase, grass root plants can apply the models to optimize consumption and emission figures.  It allows urea producers to stay competitive with production improvements, monitoring and detection, staff training and full lifecycle support. Further, feedback will be given on the EVOLVE OPTIMIZER™ project at OCI in the Netherlands. This has been in operation since 2012.

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How Industry 4.0 will Transform Urea Production and Engineering

Driving the Digital Enterprise Industry 4.0 –The next Level of Manufacturing

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Changing farmer needs for fertilizer

In several parts of the world the focus of farmers shifts from maximizing yield for example through increasing the application rate of fertilisers, to optimizing inputs. This shift requires adaptation

of the fertiliser product and/or the fertiliser application technology.

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An historic perspective on Stamicarbon

Problem statement Solution directions Requirements for an OTS Stamicarbon's 40 year history and experience with OTS Cooperation OTS offerings.

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The fertilizer industry and the port of Rotterdam

In his presentation prof. dr. Harry Geerlings will describe the historic development of the Port of Rotterdam over the last 200 years.

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StamiSpecialties
Technologies and servies for AdBlue product diversification

Urea is known as the “white gold” in the fertilizer industry as it is the most utilized in the world. In recent years, AdBlue®—also known as DEF or ARLA 32—introduced a new application for urea: it is

used to reduce NOx emissions from diesel vehicles.

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Stamicarbon UAN Technology and Protect UAN

Slide presentation on Stamicarbon's UAN technology. Years of experience with AN/UANplants: More than 150 years of operation in AN and UAN plants. 15 years at our own DSM plant in Geleen, the

Netherlands, since 2010 operating as OCI Nitrogen.

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FROM UREA TO UAS TO MULTI PRODUCT GRANULATION

• Background on nutrients (macro and micro) • Selection of sulfur source • From urea to UAS • Differences to urea granulation • Features of UAS granulation • Process development • From UAS to mul

ti-product granulation • Modular build-up of granulatio...

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Closed loop urea and bio fuel production

Review of literature date shows that 1st generation biofuels show a clear energy balance deficiency. 2nd generation biofuels have a clear positive energy balance. This is even true if the urea require

d for the sustainable production of this biomass i...

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UAN design

Brochure Stamicarbon’s UAN technology and Protect UAN

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Stami Specialties Brochure
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  1. Reference List - Advance Projects -LDS-RLM-NCM
  2. Inspection Services Advance Inspect Leaflet
  3. Safurex Brochure
  4. Reference List-Safurex Products
  5. Stami Digital Brochure

Top downloads

  1. STAMICARBON brochure Green Ammonia