Mechatest is well known for it’s excellent design of water, steam sampling and analysis solutions (SWAS) built as per ASME PTC 19.11 and VGB S-006.
We take care of your steam sample from sample tab to lab!
The Steam and Water Analysis Systems (SWAS) are designed conform latest modern technology and has been continuously improved to keep the reability of your water steam analysis safe at all times and to protect your plant from corrosion and scaling.
We built state-of-the-art SWAS systems for modern power plants, with reliable components and measuring instruments, ease of maintenance and low cost of ownership.
Mechatest is an engineering company, we are a lot more than only hands for assembling of the SWAS systems, we provide advise, concepting, engineering, calculations (pressure drop, lagtime in the complete system, temperature and cooling capacity, sample probe resonance etc.), assembling and testing.
Our solutions are suitable for outdoor use in an industrial environment and ATEX Zone 1 or 2. After selecting the analysers and designing the sample systems it is very important to choose the environment for the complete system.
As an independent System Integrator our main activities are the complete design, engineering, procurement, assembly and integration of steam and water sampling, conditioning, and analysis systems for the power cycle industry, we design accordingly to VGB/DGRL and ASME PTC 19.11 which discuss the methods and instrumentation for testing boiler make-up and feedwater, steam, and condensate in relation to performance testing.
Steam and Water Analysis System (SWAS) are designed for continuous monitoring and control of water and steam purity in the boiler plant cycle.
The SWAS sampling system shall obtain samples from steam and water pipelines which shall be adequately conditioned and flow through water analysers for continuous analysis and provide parallel facility for grab sampling.
The analyser outputs signals shall be used for continuous monitoring of various parameters like analysis of pH, Specific Conductivity, Cation Conductivity, Degassed Conductivity, Sodium, Silica, Dissolved Oxygen, Phosphate, Chlorides, TOC etc.
Analyser signals will be transported to central DCS systems where process operators can monitor and optimize the boiler cycle process.
At least two signals will be used to read the analyser measurement and check the healthy of analyser sensor;
State-of-the-art systems are provided with bus communication (e.g. Profibus or Modbus), the advantage of bus communication systems are, you need only a couple of wires, the lower cost and saving of cabling, more instrument detail information available (sample flow, temperature, sensor healthy, status, error messages, etc.
Sample Conditioning Panels are designed for proper conditioning of your steam and water samples. We take care from sample tap to sampling conditioning and analysis.
Mechatest standard sample conditioning panels for steam and water sampling purposes, the conditioning systems has the main function to reduce and regulate the temperature, flow and pressure of the sample. This kind of sampling panels are mostly used in combination with water analyser equipment for analysis on chemical parameters like conductivity, pH, dissolved Oxygen, Silica, Sodium etc.
The panels are designed with best quality products for safe operation and representative sample at the desired pressure and temperature.
From the international guidance ASME PTC 19.11 Steam and Water Sampling, Conditioning, and Analysis in the Power Cycle, Mechatest is taking care of the following sections;
SWAS Guidelines and Directives
The Standard VGB-S-006-00-2012-09-EN is intended to supplement VGB-S-010-T-00;2011-12.EN Standard for Feed Water, Boiler Water and Steam Quality for Power Plants / Industrial Plants (formerly VGB Standard VGB-R-450-Le) and to give recommendations for the correct positioning, design and instrumentation as well as for the maintenance of measuring equipment in the water/steam cycle.
This is the first time that comprehensive recommendations for sampling and physico-chemical monitoring of water/steam cycles have been established. Supplementary information relating to chemical monitoring can be found in other rules and standards.
This VGB standard has been established in close co-operation with power plant users, power plant manufacturers (OEMs for boilers/turbines), measuring instrument manufacturers as well as firms providing analytical services on the power plant sector. This standard represents the state-of-the-art.
Samples must be taken from locations that are representative of the water source, treatment plant, storage facilities, distribution network, points at which water is delivered to the consumer, and points of use. In selecting sampling points, each locality should be considered individually; however, the following general criteria are usually applicable:
Sampling points should be selected such that the samples taken are representative of the different sources from which water is obtained by the public or enters the system.
These points should include those that yield samples representative of the conditions at the most unfavourable sources or places in the supply system, particularly points of possible contamination such as unprotected sources, loops, reservoirs, low-pressure zones, ends of the system, etc.
Sampling points should be uniformly distributed throughout a piped distribution system, taking population distribution into account; the number of sampling points should be proportional to the number of links or branches.
The points chosen should generally yield samples that are representative of the system as a whole and of its main components.
Sampling points should be located in such a way that water can be sampled from reserve tanks and reservoirs, etc.
In systems with more than one water source, the locations of the sampling points should take account of the number of inhabitants served by each source.
There should be at least one sampling point directly after the clean-water outlet from each treatment plant.
We make sampling solutions helping to protect the environment now and for future generations, together we can make a difference.
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